/**************************************************************************** * $Id:: i2cmst.c 6097 2011-01-07 04:31:25Z nxp12832 $ * Project: NXP LPC17xx I2C example * * Description: * This file contains I2C test modules, main entry, to test I2C APIs. * **************************************************************************** * Software that is described herein is for illustrative purposes only * which provides customers with programming information regarding the * products. This software is supplied "AS IS" without any warranties. * NXP Semiconductors assumes no responsibility or liability for the * use of the software, conveys no license or title under any patent, * copyright, or mask work right to the product. NXP Semiconductors * reserves the right to make changes in the software without * notification. NXP Semiconductors also make no representation or * warranty that such application will be suitable for the specified * use without further testing or modification. ****************************************************************************/ #include "lpc17xx.h" #include "type.h" #include "i2c.h" extern volatile uint8_t I2CMasterBuffer[I2C_PORT_NUM][BUFSIZE]; extern volatile uint8_t I2CSlaveBuffer[I2C_PORT_NUM][BUFSIZE]; extern volatile uint32_t I2CReadLength[I2C_PORT_NUM]; extern volatile uint32_t I2CWriteLength[I2C_PORT_NUM]; #define PORT_USED0 /******************************************************************************* ** Main Function main() *******************************************************************************/ int main (void) { /* SystemClockUpdate() updates the SystemFrequency variable */ SystemClockUpdate(); I2C0Init( );/* initialize I2c0 */ I2C2Init () ; I2CReadLength [PORT_USED] = 1; I2CWriteLength [PORT_USED] = 2; I2CMasterBuffer [PORT_USED] [0] = PCF8594_ADDR; I2CMasterBuffer [PORT_USED] [1] = 0xFF; I2CMasterBuffer [PORT_USED] [2] = PCF8594_ADDR | RD_BIT; while (1) { I2CEngine (PORT_USED); } } /****************************************************************************** ** End Of File ******************************************************************************/ |
/****************************************************************************** * @file: core_cm3.h * @purpose: CMSIS Cortex-M3 Core Peripheral Access Layer Header File * @version: V1.20 * @date: 22. May 2009 *---------------------------------------------------------------------------- * * Copyright (C) 2009 ARM Limited. All rights reserved. * * ARM Limited (ARM) is supplying this software for use with Cortex-Mx * processor based microcontrollers. This file can be freely distributed * within development tools that are supporting such ARM based processors. * * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. * ******************************************************************************/ #ifndef __CM3_CORE_H__ #define __CM3_CORE_H__ #ifdef __cplusplus extern "C" { #endif #define __CM3_CMSIS_VERSION_MAIN (0x01) /*!< [31:16] CMSIS HAL main version */ #define __CM3_CMSIS_VERSION_SUB (0x20) /*!< [15:0] CMSIS HAL sub version */ #define __CM3_CMSIS_VERSION ((__CM3_CMSIS_VERSION_MAIN << 16) | __CM3_CMSIS_VERSION_SUB) /*!< CMSIS HAL version number */ #define __CORTEX_M (0x03) /*!< Cortex core */ /** * Lint configuration \n * ----------------------- \n * * The following Lint messages will be suppressed and not shown: \n * \n * --- Error 10: --- \n * register uint32_t __regBasePri __asm("basepri"); \n * Error 10: Expecting ';' \n * \n * --- Error 530: --- \n * return(__regBasePri); \n * Warning 530: Symbol '__regBasePri' (line 264) not initialized \n * \n * --- Error 550: --- \n * __regBasePri = (basePri & 0x1ff); \n * } \n * Warning 550: Symbol '__regBasePri' (line 271) not accessed \n * \n * --- Error 754: --- \n * uint32_t RESERVED0[24]; \n * Info 754: local structure member '<some, not used in the HAL>' (line 109, file ./cm3_core.h) not referenced \n * \n * --- Error 750: --- \n * #define __CM3_CORE_H__ \n * Info 750: local macro '__CM3_CORE_H__' (line 43, file./cm3_core.h) not referenced \n * \n * --- Error 528: --- \n * static __INLINE void NVIC_DisableIRQ(uint32_t IRQn) \n * Warning 528: Symbol 'NVIC_DisableIRQ(unsigned int)' (line 419, file ./cm3_core.h) not referenced \n * \n * --- Error 751: --- \n * } InterruptType_Type; \n * Info 751: local typedef 'InterruptType_Type' (line 170, file ./cm3_core.h) not referenced \n * \n * \n * Note: To re-enable a Message, insert a space before 'lint' * \n * */ /*lint -save */ /*lint -e10 */ /*lint -e530 */ /*lint -e550 */ /*lint -e754 */ /*lint -e750 */ /*lint -e528 */ /*lint -e751 */ #include <stdint.h> /* Include standard types */ #if defined (__ICCARM__) #include <intrinsics.h> /* IAR Intrinsics */ #endif #ifndef __NVIC_PRIO_BITS #define __NVIC_PRIO_BITS 4 /*!< standard definition for NVIC Priority Bits */ #endif /** * IO definitions * * define access restrictions to peripheral registers */ #ifdef __cplusplus #define __I volatile /*!< defines 'read only' permissions */ #else #define __I volatile const /*!< defines 'read only' permissions */ #endif #define __O volatile /*!< defines 'write only' permissions */ #define __IO volatile /*!< defines 'read / write' permissions */ /******************************************************************************* * Register Abstraction ******************************************************************************/ /* System Reset */ #define NVIC_VECTRESET 0 /*!< Vector Reset Bit */ #define NVIC_SYSRESETREQ 2 /*!< System Reset Request */ #define NVIC_AIRCR_VECTKEY (0x5FA << 16) /*!< AIRCR Key for write access */ #define NVIC_AIRCR_ENDIANESS 15 /*!< Endianess */ /* Core Debug */ #define CoreDebug_DEMCR_TRCENA (1 << 24) /*!< DEMCR TRCENA enable */ #define ITM_TCR_ITMENA 1 /*!< ITM enable */ /* memory mapping struct for Nested Vectored Interrupt Controller (NVIC) */ typedef struct { __IO uint32_t ISER[8]; /*!< Interrupt Set Enable Register */ uint32_t RESERVED0[24]; __IO uint32_t ICER[8]; /*!< Interrupt Clear Enable Register */ uint32_t RSERVED1[24]; __IO uint32_t ISPR[8]; /*!< Interrupt Set Pending Register */ uint32_t RESERVED2[24]; __IO uint32_t ICPR[8]; /*!< Interrupt Clear Pending Register */ uint32_t RESERVED3[24]; __IO uint32_t IABR[8]; /*!< Interrupt Active bit Register */ uint32_t RESERVED4[56]; __IO uint8_t IP[240]; /*!< Interrupt Priority Register, 8Bit wide */ uint32_t RESERVED5[644]; __O uint32_t STIR; /*!< Software Trigger Interrupt Register */ } NVIC_Type; /* memory mapping struct for System Control Block */ typedef struct { __I uint32_t CPUID; /*!< CPU ID Base Register */ __IO uint32_t ICSR; /*!< Interrupt Control State Register */ __IO uint32_t VTOR; /*!< Vector Table Offset Register */ __IO uint32_t AIRCR; /*!< Application Interrupt / Reset Control Register */ __IO uint32_t SCR; /*!< System Control Register */ __IO uint32_t CCR; /*!< Configuration Control Register */ __IO uint8_t SHP[12]; /*!< System Handlers Priority Registers (4-7, 8-11, 12-15) */ __IO uint32_t SHCSR; /*!< System Handler Control and State Register */ __IO uint32_t CFSR; /*!< Configurable Fault Status Register */ __IO uint32_t HFSR; /*!< Hard Fault Status Register */ __IO uint32_t DFSR; /*!< Debug Fault Status Register */ __IO uint32_t MMFAR; /*!< Mem Manage Address Register */ __IO uint32_t BFAR; /*!< Bus Fault Address Register */ __IO uint32_t AFSR; /*!< Auxiliary Fault Status Register */ __I uint32_t PFR[2]; /*!< Processor Feature Register */ __I uint32_t DFR; /*!< Debug Feature Register */ __I uint32_t ADR; /*!< Auxiliary Feature Register */ __I uint32_t MMFR[4]; /*!< Memory Model Feature Register */ __I uint32_t ISAR[5]; /*!< ISA Feature Register */ } SCB_Type; /* memory mapping struct for SysTick */ typedef struct { __IO uint32_t CTRL; /*!< SysTick Control and Status Register */ __IO uint32_t LOAD; /*!< SysTick Reload Value Register */ __IO uint32_t VAL; /*!< SysTick Current Value Register */ __I uint32_t CALIB; /*!< SysTick Calibration Register */ } SysTick_Type; /* memory mapping structur for ITM */ typedef struct { __O union { __O uint8_t u8; /*!< ITM Stimulus Port 8-bit */ __O uint16_t u16; /*!< ITM Stimulus Port 16-bit */ __O uint32_t u32; /*!< ITM Stimulus Port 32-bit */ } PORT [32]; /*!< ITM Stimulus Port Registers */ uint32_t RESERVED0[864]; __IO uint32_t TER; /*!< ITM Trace Enable Register */ uint32_t RESERVED1[15]; __IO uint32_t TPR; /*!< ITM Trace Privilege Register */ uint32_t RESERVED2[15]; __IO uint32_t TCR; /*!< ITM Trace Control Register */ uint32_t RESERVED3[29]; __IO uint32_t IWR; /*!< ITM Integration Write Register */ __IO uint32_t IRR; /*!< ITM Integration Read Register */ __IO uint32_t IMCR; /*!< ITM Integration Mode Control Register */ uint32_t RESERVED4[43]; __IO uint32_t LAR; /*!< ITM Lock Access Register */ __IO uint32_t LSR; /*!< ITM Lock Status Register */ uint32_t RESERVED5[6]; __I uint32_t PID4; /*!< ITM Product ID Registers */ __I uint32_t PID5; __I uint32_t PID6; __I uint32_t PID7; __I uint32_t PID0; __I uint32_t PID1; __I uint32_t PID2; __I uint32_t PID3; __I uint32_t CID0; __I uint32_t CID1; __I uint32_t CID2; __I uint32_t CID3; } ITM_Type; /* memory mapped struct for Interrupt Type */ typedef struct { uint32_t RESERVED0; __I uint32_t ICTR; /*!< Interrupt Control Type Register */ #if ((defined __CM3_REV) && (__CM3_REV >= 0x200)) __IO uint32_t ACTLR; /*!< Auxiliary Control Register */ #else uint32_t RESERVED1; #endif } InterruptType_Type; /* Memory Protection Unit */ #if defined (__MPU_PRESENT) && (__MPU_PRESENT == 1) typedef struct { __I uint32_t TYPE; /*!< MPU Type Register */ __IO uint32_t CTRL; /*!< MPU Control Register */ __IO uint32_t RNR; /*!< MPU Region RNRber Register */ __IO uint32_t RBAR; /*!< MPU Region Base Address Register */ __IO uint32_t RASR; /*!< MPU Region Attribute and Size Register */ __IO uint32_t RBAR_A1; /*!< MPU Alias 1 Region Base Address Register */ __IO uint32_t RASR_A1; /*!< MPU Alias 1 Region Attribute and Size Register */ __IO uint32_t RBAR_A2; /*!< MPU Alias 2 Region Base Address Register */ __IO uint32_t RASR_A2; /*!< MPU Alias 2 Region Attribute and Size Register */ __IO uint32_t RBAR_A3; /*!< MPU Alias 3 Region Base Address Register */ __IO uint32_t RASR_A3; /*!< MPU Alias 3 Region Attribute and Size Register */ } MPU_Type; #endif /* Core Debug Register */ typedef struct { __IO uint32_t DHCSR; /*!< Debug Halting Control and Status Register */ __O uint32_t DCRSR; /*!< Debug Core Register Selector Register */ __IO uint32_t DCRDR; /*!< Debug Core Register Data Register */ __IO uint32_t DEMCR; /*!< Debug Exception and Monitor Control Register */ } CoreDebug_Type; /* Memory mapping of Cortex-M3 Hardware */ #define SCS_BASE (0xE000E000) /*!< System Control Space Base Address */ #define ITM_BASE (0xE0000000) /*!< ITM Base Address */ #define CoreDebug_BASE (0xE000EDF0) /*!< Core Debug Base Address */ #define SysTick_BASE (SCS_BASE + 0x0010) /*!< SysTick Base Address */ #define NVIC_BASE (SCS_BASE + 0x0100) /*!< NVIC Base Address */ #define SCB_BASE (SCS_BASE + 0x0D00) /*!< System Control Block Base Address */ #define InterruptType ((InterruptType_Type *) SCS_BASE) /*!< Interrupt Type Register */ #define SCB ((SCB_Type *) SCB_BASE) /*!< SCB configuration struct */ #define SysTick ((SysTick_Type *) SysTick_BASE) /*!< SysTick configuration struct */ #define NVIC ((NVIC_Type *) NVIC_BASE) /*!< NVIC configuration struct */ #define ITM ((ITM_Type *) ITM_BASE) /*!< ITM configuration struct */ #define CoreDebug ((CoreDebug_Type *) CoreDebug_BASE) /*!< Core Debug configuration struct */ #if defined (__MPU_PRESENT) && (__MPU_PRESENT == 1) #define MPU_BASE (SCS_BASE + 0x0D90) /*!< Memory Protection Unit */ #define MPU ((MPU_Type*) MPU_BASE) /*!< Memory Protection Unit */ #endif /******************************************************************************* * Hardware Abstraction Layer ******************************************************************************/ #if defined ( __CC_ARM ) #define __ASM __asm /*!< asm keyword for ARM Compiler */ #define __INLINE __inline /*!< inline keyword for ARM Compiler */ #elif defined ( __ICCARM__ ) #define __ASM __asm /*!< asm keyword for IAR Compiler */ #define __INLINE inline /*!< inline keyword for IAR Compiler. Only avaiable in High optimization mode! */ #elif defined ( __GNUC__ ) #define __ASM __asm /*!< asm keyword for GNU Compiler */ #define __INLINE inline /*!< inline keyword for GNU Compiler */ #elif defined ( __TASKING__ ) #define __ASM __asm /*!< asm keyword for TASKING Compiler */ #define __INLINE inline /*!< inline keyword for TASKING Compiler */ #endif /* ################### Compiler specific Intrinsics ########################### */ #if defined ( __CC_ARM ) /*------------------RealView Compiler -----------------*/ /* ARM armcc specific functions */ #define __enable_fault_irq __enable_fiq #define __disable_fault_irq __disable_fiq #define __NOP __nop #define __WFI __wfi #define __WFE __wfe #define __SEV __sev #define __ISB() __isb(0) #define __DSB() __dsb(0) #define __DMB() __dmb(0) #define __REV __rev #define __RBIT __rbit #define __LDREXB(ptr) ((unsigned char ) __ldrex(ptr)) #define __LDREXH(ptr) ((unsigned short) __ldrex(ptr)) #define __LDREXW(ptr) ((unsigned int ) __ldrex(ptr)) #define __STREXB(value, ptr) __strex(value, ptr) #define __STREXH(value, ptr) __strex(value, ptr) #define __STREXW(value, ptr) __strex(value, ptr) /* intrinsic unsigned long long __ldrexd(volatile void *ptr) */ /* intrinsic int __strexd(unsigned long long val, volatile void *ptr) */ /* intrinsic void __enable_irq(); */ /* intrinsic void __disable_irq(); */ /** * @brief Return the Process Stack Pointer * * @param none * @return uint32_t ProcessStackPointer * * Return the actual process stack pointer */ extern uint32_t __get_PSP(void); /** * @brief Set the Process Stack Pointer * * @param uint32_t Process Stack Pointer * @return none * * Assign the value ProcessStackPointer to the MSP * (process stack pointer) Cortex processor register */ extern void __set_PSP(uint32_t topOfProcStack); /** * @brief Return the Main Stack Pointer * * @param none * @return uint32_t Main Stack Pointer * * Return the current value of the MSP (main stack pointer) * Cortex processor register */ extern uint32_t __get_MSP(void); /** * @brief Set the Main Stack Pointer * * @param uint32_t Main Stack Pointer * @return none * * Assign the value mainStackPointer to the MSP * (main stack pointer) Cortex processor register */ extern void __set_MSP(uint32_t topOfMainStack); /** * @brief Reverse byte order in unsigned short value * * @param uint16_t value to reverse * @return uint32_t reversed value * * Reverse byte order in unsigned short value */ extern uint32_t __REV16(uint16_t value); /* * @brief Reverse byte order in signed short value with sign extension to integer * * @param int16_t value to reverse * @return int32_t reversed value * * Reverse byte order in signed short value with sign extension to integer */ extern int32_t __REVSH(int16_t value); #if (__ARMCC_VERSION < 400000) /** * @brief Remove the exclusive lock created by ldrex * * @param none * @return none * * Removes the exclusive lock which is created by ldrex. */ extern void __CLREX(void); /** * @brief Return the Base Priority value * * @param none * @return uint32_t BasePriority * * Return the content of the base priority register */ extern uint32_t __get_BASEPRI(void); /** * @brief Set the Base Priority value * * @param uint32_t BasePriority * @return none * * Set the base priority register */ extern void __set_BASEPRI(uint32_t basePri); /** * @brief Return the Priority Mask value * * @param none * @return uint32_t PriMask * * Return the state of the priority mask bit from the priority mask * register */ extern uint32_t __get_PRIMASK(void); /** * @brief Set the Priority Mask value * * @param uint32_t PriMask * @return none * * Set the priority mask bit in the priority mask register */ extern void __set_PRIMASK(uint32_t priMask); /** * @brief Return the Fault Mask value * * @param none * @return uint32_t FaultMask * * Return the content of the fault mask register */ extern uint32_t __get_FAULTMASK(void); /** * @brief Set the Fault Mask value * * @param uint32_t faultMask value * @return none * * Set the fault mask register */ extern void __set_FAULTMASK(uint32_t faultMask); /** * @brief Return the Control Register value * * @param none * @return uint32_t Control value * * Return the content of the control register */ extern uint32_t __get_CONTROL(void); /** * @brief Set the Control Register value * * @param uint32_t Control value * @return none * * Set the control register */ extern void __set_CONTROL(uint32_t control); #else /* (__ARMCC_VERSION >= 400000) */ /** * @brief Remove the exclusive lock created by ldrex * * @param none * @return none * * Removes the exclusive lock which is created by ldrex. */ #define __CLREX __clrex /** * @brief Return the Base Priority value * * @param none * @return uint32_t BasePriority * * Return the content of the base priority register */ static __INLINE uint32_t __get_BASEPRI(void) { register uint32_t __regBasePri __ASM("basepri"); return(__regBasePri); } /** * @brief Set the Base Priority value * * @param uint32_t BasePriority * @return none * * Set the base priority register */ static __INLINE void __set_BASEPRI(uint32_t basePri) { register uint32_t __regBasePri __ASM("basepri"); __regBasePri = (basePri & 0x1ff); } /** * @brief Return the Priority Mask value * * @param none * @return uint32_t PriMask * * Return the state of the priority mask bit from the priority mask * register */ static __INLINE uint32_t __get_PRIMASK(void) { register uint32_t __regPriMask __ASM("primask"); return(__regPriMask); } /** * @brief Set the Priority Mask value * * @param uint32_t PriMask * @return none * * Set the priority mask bit in the priority mask register */ static __INLINE void __set_PRIMASK(uint32_t priMask) { register uint32_t __regPriMask __ASM("primask"); __regPriMask = (priMask); } /** * @brief Return the Fault Mask value * * @param none * @return uint32_t FaultMask * * Return the content of the fault mask register */ static __INLINE uint32_t __get_FAULTMASK(void) { register uint32_t __regFaultMask __ASM("faultmask"); return(__regFaultMask); } /** * @brief Set the Fault Mask value * * @param uint32_t faultMask value * @return none * * Set the fault mask register */ static __INLINE void __set_FAULTMASK(uint32_t faultMask) { register uint32_t __regFaultMask __ASM("faultmask"); __regFaultMask = (faultMask & 1); } /** * @brief Return the Control Register value * * @param none * @return uint32_t Control value * * Return the content of the control register */ static __INLINE uint32_t __get_CONTROL(void) { register uint32_t __regControl __ASM("control"); return(__regControl); } /** * @brief Set the Control Register value * * @param uint32_t Control value * @return none * * Set the control register */ static __INLINE void __set_CONTROL(uint32_t control) { register uint32_t __regControl __ASM("control"); __regControl = control; } #endif /* __ARMCC_VERSION */ #elif (defined (__ICCARM__)) /*------------------ ICC Compiler -------------------*/ /* IAR iccarm specific functions */ #define __enable_irq __enable_interrupt /*!< global Interrupt enable */ #define __disable_irq __disable_interrupt /*!< global Interrupt disable */ static __INLINE void __enable_fault_irq() { __ASM ("cpsie f"); } static __INLINE void __disable_fault_irq() { __ASM ("cpsid f"); } #define __NOP __no_operation() /*!< no operation intrinsic in IAR Compiler */ static __INLINE void __WFI() { __ASM ("wfi"); } static __INLINE void __WFE() { __ASM ("wfe"); } static __INLINE void __SEV() { __ASM ("sev"); } static __INLINE void __CLREX() { __ASM ("clrex"); } /* intrinsic void __ISB(void) */ /* intrinsic void __DSB(void) */ /* intrinsic void __DMB(void) */ /* intrinsic void __set_PRIMASK(); */ /* intrinsic void __get_PRIMASK(); */ /* intrinsic void __set_FAULTMASK(); */ /* intrinsic void __get_FAULTMASK(); */ /* intrinsic uint32_t __REV(uint32_t value); */ /* intrinsic uint32_t __REVSH(uint32_t value); */ /* intrinsic unsigned long __STREX(unsigned long, unsigned long); */ /* intrinsic unsigned long __LDREX(unsigned long *); */ /** * @brief Return the Process Stack Pointer * * @param none * @return uint32_t ProcessStackPointer * * Return the actual process stack pointer */ extern uint32_t __get_PSP(void); /** * @brief Set the Process Stack Pointer * * @param uint32_t Process Stack Pointer * @return none * * Assign the value ProcessStackPointer to the MSP * (process stack pointer) Cortex processor register */ extern void __set_PSP(uint32_t topOfProcStack); /** * @brief Return the Main Stack Pointer * * @param none * @return uint32_t Main Stack Pointer * * Return the current value of the MSP (main stack pointer) * Cortex processor register */ extern uint32_t __get_MSP(void); /** * @brief Set the Main Stack Pointer * * @param uint32_t Main Stack Pointer * @return none * * Assign the value mainStackPointer to the MSP * (main stack pointer) Cortex processor register */ extern void __set_MSP(uint32_t topOfMainStack); /** * @brief Reverse byte order in unsigned short value * * @param uint16_t value to reverse * @return uint32_t reversed value * * Reverse byte order in unsigned short value */ extern uint32_t __REV16(uint16_t value); /** * @brief Reverse bit order of value * * @param uint32_t value to reverse * @return uint32_t reversed value * * Reverse bit order of value */ extern uint32_t __RBIT(uint32_t value); /** * @brief LDR Exclusive * * @param uint8_t* address * @return uint8_t value of (*address) * * Exclusive LDR command */ extern uint8_t __LDREXB(uint8_t *addr); /** * @brief LDR Exclusive * * @param uint16_t* address * @return uint16_t value of (*address) * * Exclusive LDR command */ extern uint16_t __LDREXH(uint16_t *addr); /** * @brief LDR Exclusive * * @param uint32_t* address * @return uint32_t value of (*address) * * Exclusive LDR command */ extern uint32_t __LDREXW(uint32_t *addr); /** * @brief STR Exclusive * * @param uint8_t *address * @param uint8_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ extern uint32_t __STREXB(uint8_t value, uint8_t *addr); /** * @brief STR Exclusive * * @param uint16_t *address * @param uint16_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ extern uint32_t __STREXH(uint16_t value, uint16_t *addr); /** * @brief STR Exclusive * * @param uint32_t *address * @param uint32_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ extern uint32_t __STREXW(uint32_t value, uint32_t *addr); #elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/ /* GNU gcc specific functions */ static __INLINE void __enable_irq() { __ASM volatile ("cpsie i"); } static __INLINE void __disable_irq() { __ASM volatile ("cpsid i"); } static __INLINE void __enable_fault_irq() { __ASM volatile ("cpsie f"); } static __INLINE void __disable_fault_irq() { __ASM volatile ("cpsid f"); } static __INLINE void __NOP() { __ASM volatile ("nop"); } static __INLINE void __WFI() { __ASM volatile ("wfi"); } static __INLINE void __WFE() { __ASM volatile ("wfe"); } static __INLINE void __SEV() { __ASM volatile ("sev"); } static __INLINE void __ISB() { __ASM volatile ("isb"); } static __INLINE void __DSB() { __ASM volatile ("dsb"); } static __INLINE void __DMB() { __ASM volatile ("dmb"); } static __INLINE void __CLREX() { __ASM volatile ("clrex"); } /** * @brief Return the Process Stack Pointer * * @param none * @return uint32_t ProcessStackPointer * * Return the actual process stack pointer */ extern uint32_t __get_PSP(void); /** * @brief Set the Process Stack Pointer * * @param uint32_t Process Stack Pointer * @return none * * Assign the value ProcessStackPointer to the MSP * (process stack pointer) Cortex processor register */ extern void __set_PSP(uint32_t topOfProcStack); /** * @brief Return the Main Stack Pointer * * @param none * @return uint32_t Main Stack Pointer * * Return the current value of the MSP (main stack pointer) * Cortex processor register */ extern uint32_t __get_MSP(void); /** * @brief Set the Main Stack Pointer * * @param uint32_t Main Stack Pointer * @return none * * Assign the value mainStackPointer to the MSP * (main stack pointer) Cortex processor register */ extern void __set_MSP(uint32_t topOfMainStack); /** * @brief Return the Base Priority value * * @param none * @return uint32_t BasePriority * * Return the content of the base priority register */ extern uint32_t __get_BASEPRI(void); /** * @brief Set the Base Priority value * * @param uint32_t BasePriority * @return none * * Set the base priority register */ extern void __set_BASEPRI(uint32_t basePri); /** * @brief Return the Priority Mask value * * @param none * @return uint32_t PriMask * * Return the state of the priority mask bit from the priority mask * register */ extern uint32_t __get_PRIMASK(void); /** * @brief Set the Priority Mask value * * @param uint32_t PriMask * @return none * * Set the priority mask bit in the priority mask register */ extern void __set_PRIMASK(uint32_t priMask); /** * @brief Return the Fault Mask value * * @param none * @return uint32_t FaultMask * * Return the content of the fault mask register */ extern uint32_t __get_FAULTMASK(void); /** * @brief Set the Fault Mask value * * @param uint32_t faultMask value * @return none * * Set the fault mask register */ extern void __set_FAULTMASK(uint32_t faultMask); /** * @brief Return the Control Register value * * @param none * @return uint32_t Control value * * Return the content of the control register */ extern uint32_t __get_CONTROL(void); /** * @brief Set the Control Register value * * @param uint32_t Control value * @return none * * Set the control register */ extern void __set_CONTROL(uint32_t control); /** * @brief Reverse byte order in integer value * * @param uint32_t value to reverse * @return uint32_t reversed value * * Reverse byte order in integer value */ extern uint32_t __REV(uint32_t value); /** * @brief Reverse byte order in unsigned short value * * @param uint16_t value to reverse * @return uint32_t reversed value * * Reverse byte order in unsigned short value */ extern uint32_t __REV16(uint16_t value); /* * Reverse byte order in signed short value with sign extension to integer * * @param int16_t value to reverse * @return int32_t reversed value * * @brief Reverse byte order in signed short value with sign extension to integer */ extern int32_t __REVSH(int16_t value); /** * @brief Reverse bit order of value * * @param uint32_t value to reverse * @return uint32_t reversed value * * Reverse bit order of value */ extern uint32_t __RBIT(uint32_t value); /** * @brief LDR Exclusive * * @param uint8_t* address * @return uint8_t value of (*address) * * Exclusive LDR command */ extern uint8_t __LDREXB(uint8_t *addr); /** * @brief LDR Exclusive * * @param uint16_t* address * @return uint16_t value of (*address) * * Exclusive LDR command */ extern uint16_t __LDREXH(uint16_t *addr); /** * @brief LDR Exclusive * * @param uint32_t* address * @return uint32_t value of (*address) * * Exclusive LDR command */ extern uint32_t __LDREXW(uint32_t *addr); /** * @brief STR Exclusive * * @param uint8_t *address * @param uint8_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ extern uint32_t __STREXB(uint8_t value, uint8_t *addr); /** * @brief STR Exclusive * * @param uint16_t *address * @param uint16_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ extern uint32_t __STREXH(uint16_t value, uint16_t *addr); /** * @brief STR Exclusive * * @param uint32_t *address * @param uint32_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ extern uint32_t __STREXW(uint32_t value, uint32_t *addr); #elif (defined (__TASKING__)) /*------------------ TASKING Compiler ---------------------*/ /* TASKING carm specific functions */ /* * The CMSIS functions have been implemented as intrinsics in the compiler. * Please use "carm -?i" to get an up to date list of all instrinsics, * Including the CMSIS ones. */ #endif /* ########################## NVIC functions #################################### */ /** * @brief Set the Priority Grouping in NVIC Interrupt Controller * * @param uint32_t priority_grouping is priority grouping field * @return none * * Set the priority grouping field using the required unlock sequence. * The parameter priority_grouping is assigned to the field * SCB->AIRCR [10:8] PRIGROUP field. Only values from 0..7 are used. * In case of a conflict between priority grouping and available * priority bits (__NVIC_PRIO_BITS) the smallest possible priority group is set. */ static __INLINE void NVIC_SetPriorityGrouping(uint32_t PriorityGroup) { uint32_t reg_value; uint32_t PriorityGroupTmp = (PriorityGroup & 0x07); /* only values 0..7 are used */ reg_value = SCB->AIRCR; /* read old register configuration */ reg_value &= ~((0xFFFFU << 16) | (0x0F << 8)); /* clear bits to change */ reg_value = ((reg_value | NVIC_AIRCR_VECTKEY | (PriorityGroupTmp << 8))); /* Insert write key and priorty group */ SCB->AIRCR = reg_value; } /** * @brief Get the Priority Grouping from NVIC Interrupt Controller * * @param none * @return uint32_t priority grouping field * * Get the priority grouping from NVIC Interrupt Controller. * priority grouping is SCB->AIRCR [10:8] PRIGROUP field. */ static __INLINE uint32_t NVIC_GetPriorityGrouping(void) { return ((SCB->AIRCR >> 8) & 0x07); /* read priority grouping field */ } /** * @brief Enable Interrupt in NVIC Interrupt Controller * * @param IRQn_Type IRQn specifies the interrupt number * @return none * * Enable a device specific interupt in the NVIC interrupt controller. * The interrupt number cannot be a negative value. */ static __INLINE void NVIC_EnableIRQ(IRQn_Type IRQn) { NVIC->ISER[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* enable interrupt */ } /** * @brief Disable the interrupt line for external interrupt specified * * @param IRQn_Type IRQn is the positive number of the external interrupt * @return none * * Disable a device specific interupt in the NVIC interrupt controller. * The interrupt number cannot be a negative value. */ static __INLINE void NVIC_DisableIRQ(IRQn_Type IRQn) { NVIC->ICER[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* disable interrupt */ } /** * @brief Read the interrupt pending bit for a device specific interrupt source * * @param IRQn_Type IRQn is the number of the device specifc interrupt * @return uint32_t 1 if pending interrupt else 0 * * Read the pending register in NVIC and return 1 if its status is pending, * otherwise it returns 0 */ static __INLINE uint32_t NVIC_GetPendingIRQ(IRQn_Type IRQn) { return((uint32_t) ((NVIC->ISPR[(uint32_t)(IRQn) >> 5] & (1 << ((uint32_t)(IRQn) & 0x1F)))?1:0)); /* Return 1 if pending else 0 */ } /** * @brief Set the pending bit for an external interrupt * * @param IRQn_Type IRQn is the Number of the interrupt * @return none * * Set the pending bit for the specified interrupt. * The interrupt number cannot be a negative value. */ static __INLINE void NVIC_SetPendingIRQ(IRQn_Type IRQn) { NVIC->ISPR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* set interrupt pending */ } /** * @brief Clear the pending bit for an external interrupt * * @param IRQn_Type IRQn is the Number of the interrupt * @return none * * Clear the pending bit for the specified interrupt. * The interrupt number cannot be a negative value. */ static __INLINE void NVIC_ClearPendingIRQ(IRQn_Type IRQn) { NVIC->ICPR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* Clear pending interrupt */ } /** * @brief Read the active bit for an external interrupt * * @param IRQn_Type IRQn is the Number of the interrupt * @return uint32_t 1 if active else 0 * * Read the active register in NVIC and returns 1 if its status is active, * otherwise it returns 0. */ static __INLINE uint32_t NVIC_GetActive(IRQn_Type IRQn) { return((uint32_t)((NVIC->IABR[(uint32_t)(IRQn) >> 5] & (1 << ((uint32_t)(IRQn) & 0x1F)))?1:0)); /* Return 1 if active else 0 */ } /** * @brief Set the priority for an interrupt * * @param IRQn_Type IRQn is the Number of the interrupt * @param priority is the priority for the interrupt * @return none * * Set the priority for the specified interrupt. The interrupt * number can be positive to specify an external (device specific) * interrupt, or negative to specify an internal (core) interrupt. \n * * Note: The priority cannot be set for every core interrupt. */ static __INLINE void NVIC_SetPriority(IRQn_Type IRQn, uint32_t priority) { if(IRQn < 0) { SCB->SHP[((uint32_t)(IRQn) & 0xF)-4] = ((priority << (8 - __NVIC_PRIO_BITS)) & 0xff); } /* set Priority for Cortex-M3 System Interrupts */ else { NVIC->IP[(uint32_t)(IRQn)] = ((priority << (8 - __NVIC_PRIO_BITS)) & 0xff); } /* set Priority for device specific Interrupts */ } /** * @brief Read the priority for an interrupt * * @param IRQn_Type IRQn is the Number of the interrupt * @return uint32_t priority is the priority for the interrupt * * Read the priority for the specified interrupt. The interrupt * number can be positive to specify an external (device specific) * interrupt, or negative to specify an internal (core) interrupt. * * The returned priority value is automatically aligned to the implemented * priority bits of the microcontroller. * * Note: The priority cannot be set for every core interrupt. */ static __INLINE uint32_t NVIC_GetPriority(IRQn_Type IRQn) { if(IRQn < 0) { return((uint32_t)(SCB->SHP[((uint32_t)(IRQn) & 0xF)-4] >> (8 - __NVIC_PRIO_BITS))); } /* get priority for Cortex-M3 system interrupts */ else { return((uint32_t)(NVIC->IP[(uint32_t)(IRQn)] >> (8 - __NVIC_PRIO_BITS))); } /* get priority for device specific interrupts */ } /** * @brief Encode the priority for an interrupt * * @param uint32_t PriorityGroup is the used priority group * @param uint32_t PreemptPriority is the preemptive priority value (starting from 0) * @param uint32_t SubPriority is the sub priority value (starting from 0) * @return uint32_t the priority for the interrupt * * Encode the priority for an interrupt with the given priority group, * preemptive priority value and sub priority value. * In case of a conflict between priority grouping and available * priority bits (__NVIC_PRIO_BITS) the samllest possible priority group is set. * * The returned priority value can be used for NVIC_SetPriority(...) function */ static __INLINE uint32_t NVIC_EncodePriority (uint32_t PriorityGroup, uint32_t PreemptPriority, uint32_t SubPriority) { uint32_t PriorityGroupTmp = (PriorityGroup & 0x07); /* only values 0..7 are used */ uint32_t PreemptPriorityBits; uint32_t SubPriorityBits; PreemptPriorityBits = ((7 - PriorityGroupTmp) > __NVIC_PRIO_BITS) ? __NVIC_PRIO_BITS : 7 - PriorityGroupTmp; SubPriorityBits = ((PriorityGroupTmp + __NVIC_PRIO_BITS) < 7) ? 0 : PriorityGroupTmp - 7 + __NVIC_PRIO_BITS; return ( ((PreemptPriority & ((1 << (PreemptPriorityBits)) - 1)) << SubPriorityBits) | ((SubPriority & ((1 << (SubPriorityBits )) - 1))) ); } /** * @brief Decode the priority of an interrupt * * @param uint32_t Priority the priority for the interrupt * @param uint32_t PrioGroup is the used priority group * @param uint32_t* pPreemptPrio is the preemptive priority value (starting from 0) * @param uint32_t* pSubPrio is the sub priority value (starting from 0) * @return none * * Decode an interrupt priority value with the given priority group to * preemptive priority value and sub priority value. * In case of a conflict between priority grouping and available * priority bits (__NVIC_PRIO_BITS) the samllest possible priority group is set. * * The priority value can be retrieved with NVIC_GetPriority(...) function */ static __INLINE void NVIC_DecodePriority (uint32_t Priority, uint32_t PriorityGroup, uint32_t* pPreemptPriority, uint32_t* pSubPriority) { uint32_t PriorityGroupTmp = (PriorityGroup & 0x07); /* only values 0..7 are used */ uint32_t PreemptPriorityBits; uint32_t SubPriorityBits; PreemptPriorityBits = ((7 - PriorityGroupTmp) > __NVIC_PRIO_BITS) ? __NVIC_PRIO_BITS : 7 - PriorityGroupTmp; SubPriorityBits = ((PriorityGroupTmp + __NVIC_PRIO_BITS) < 7) ? 0 : PriorityGroupTmp - 7 + __NVIC_PRIO_BITS; *pPreemptPriority = (Priority >> SubPriorityBits) & ((1 << (PreemptPriorityBits)) - 1); *pSubPriority = (Priority ) & ((1 << (SubPriorityBits )) - 1); } /* ################################## SysTick function ############################################ */ #if (!defined (__Vendor_SysTickConfig)) || (__Vendor_SysTickConfig == 0) /* SysTick constants */ #define SYSTICK_ENABLE 0 /* Config-Bit to start or stop the SysTick Timer */ #define SYSTICK_TICKINT 1 /* Config-Bit to enable or disable the SysTick interrupt */ #define SYSTICK_CLKSOURCE 2 /* Clocksource has the offset 2 in SysTick Control and Status Register */ #define SYSTICK_MAXCOUNT ((1<<24) -1) /* SysTick MaxCount */ /** * @brief Initialize and start the SysTick counter and its interrupt. * * @param uint32_t ticks is the number of ticks between two interrupts * @return none * * Initialise the system tick timer and its interrupt and start the * system tick timer / counter in free running mode to generate * periodical interrupts. */ static __INLINE uint32_t SysTick_Config(uint32_t ticks) { if (ticks > SYSTICK_MAXCOUNT) return (1); /* Reload value impossible */ SysTick->LOAD = (ticks & SYSTICK_MAXCOUNT) - 1; /* set reload register */ NVIC_SetPriority (SysTick_IRQn, (1<<__NVIC_PRIO_BITS) - 1); /* set Priority for Cortex-M0 System Interrupts */ SysTick->VAL = (0x00); /* Load the SysTick Counter Value */ SysTick->CTRL = (1 << SYSTICK_CLKSOURCE) | (1<<SYSTICK_ENABLE) | (1<<SYSTICK_TICKINT); /* Enable SysTick IRQ and SysTick Timer */ return (0); /* Function successful */ } #endif /* ################################## Reset function ############################################ */ /** * @brief Initiate a system reset request. * * @param none * @return none * * Initialize a system reset request to reset the MCU */ static __INLINE void NVIC_SystemReset(void) { SCB->AIRCR = (NVIC_AIRCR_VECTKEY | (SCB->AIRCR & (0x700)) | (1<<NVIC_SYSRESETREQ)); /* Keep priority group unchanged */ __DSB(); /* Ensure completion of memory access */ while(1); /* wait until reset */ } /* ################################## Debug Output function ############################################ */ /** * @brief Outputs a character via the ITM channel 0 * * @param uint32_t character to output * @return uint32_t input character * * The function outputs a character via the ITM channel 0. * The function returns when no debugger is connected that has booked the output. * It is blocking when a debugger is connected, but the previous character send is not transmitted. */ static __INLINE uint32_t ITM_SendChar (uint32_t ch) { if (ch == '\n') ITM_SendChar('\r'); if ((CoreDebug->DEMCR & CoreDebug_DEMCR_TRCENA) && (ITM->TCR & ITM_TCR_ITMENA) && (ITM->TER & (1UL << 0)) ) { while (ITM->PORT[0].u32 == 0); ITM->PORT[0].u8 = (uint8_t) ch; } return (ch); } #ifdef __cplusplus } #endif #endif /* __CM3_CORE_H__ */ /*lint -restore */ |
/**************************************************************************** * $Id:: i2c.h 5865 2010-12-08 21:42:21Z usb00423 $ * Project: NXP LPC17xx I2C example * * Description: * This file contains I2C code header definition. * **************************************************************************** * Software that is described herein is for illustrative purposes only * which provides customers with programming information regarding the * products. This software is supplied "AS IS" without any warranties. * NXP Semiconductors assumes no responsibility or liability for the * use of the software, conveys no license or title under any patent, * copyright, or mask work right to the product. NXP Semiconductors * reserves the right to make changes in the software without * notification. NXP Semiconductors also make no representation or * warranty that such application will be suitable for the specified * use without further testing or modification. ****************************************************************************/ #ifndef __I2C_H #define __I2C_H /* If I2C SEEPROM is tested, make sure FAST_MODE_PLUS is 0. For board to board test, this flag can be turned on. */ #define FAST_MODE_PLUS 0 #define I2C_PORT_NUM 3 #define BUFSIZE 64 #define MAX_TIMEOUT 0x00FFFFFF static LPC_I2C_TypeDef (* const LPC_I2C[I2C_PORT_NUM]) = { LPC_I2C0, LPC_I2C1, LPC_I2C2 }; #define I2CMASTER 0x01 #define I2CSLAVE 0x02 #define PCF8594_ADDR 0x40 #define READ_WRITE 0x01 #define RD_BIT 0x01 #define I2C_IDLE 0 #define I2C_STARTED 1 #define I2C_RESTARTED 2 #define I2C_REPEATED_START 3 #define DATA_ACK 4 #define DATA_NACK 5 #define I2C_BUSY 6 #define I2C_NO_DATA 7 #define I2C_NACK_ON_ADDRESS 8 #define I2C_NACK_ON_DATA 9 #define I2C_ARBITRATION_LOST 10 #define I2C_TIME_OUT 11 #define I2C_OK 12 #define I2CONSET_I2EN (0x1<<6) /* I2C Control Set Register */ #define I2CONSET_AA (0x1<<2) #define I2CONSET_SI (0x1<<3) #define I2CONSET_STO (0x1<<4) #define I2CONSET_STA (0x1<<5) #define I2CONCLR_AAC (0x1<<2) /* I2C Control clear Register */ #define I2CONCLR_SIC (0x1<<3) #define I2CONCLR_STAC (0x1<<5) #define I2CONCLR_I2ENC (0x1<<6) #define I2DAT_I2C0x00000000 /* I2C Data Reg */ #define I2ADR_I2C0x00000000 /* I2C Slave Address Reg */ #define I2SCLH_SCLH0x00000080 /* I2C SCL Duty Cycle High Reg */ #define I2SCLL_SCLL0x00000080 /* I2C SCL Duty Cycle Low Reg */ #define I2SCLH_HS_SCLH0x00000008 /* Fast Plus I2C SCL Duty Cycle High Reg */ #define I2SCLL_HS_SCLL0x00000008 /* Fast Plus I2C SCL Duty Cycle Low Reg */ extern void I2C0_IRQHandler( void ); extern void I2C1_IRQHandler( void ); extern void I2C2_IRQHandler( void ); extern void I2C0Init( void ); extern void I2C1Init( void ); extern void I2C2Init( void ); extern uint32_t I2CStart( uint32_t portNum ); extern uint32_t I2CStop( uint32_t portNum ); extern uint32_t I2CEngine( uint32_t portNum ); #endif /* end __I2C_H */ /**************************************************************************** ** End Of File *****************************************************************************/ |
/**************************************************************************** * $Id:: i2c.c 5865 2010-12-08 21:42:21Z usb00423 $ * Project: NXP LPC17xx I2C example * * Description: * This file contains I2C code example which include I2C initialization, * I2C interrupt handler, and APIs for I2C access. * **************************************************************************** * Software that is described herein is for illustrative purposes only * which provides customers with programming information regarding the * products. This software is supplied "AS IS" without any warranties. * NXP Semiconductors assumes no responsibility or liability for the * use of the software, conveys no license or title under any patent, * copyright, or mask work right to the product. NXP Semiconductors * reserves the right to make changes in the software without * notification. NXP Semiconductors also make no representation or * warranty that such application will be suitable for the specified * use without further testing or modification. ****************************************************************************/ #include "lpc17xx.h" #include "type.h" #include "i2c.h" volatile uint32_t I2CMasterState[I2C_PORT_NUM] = {I2C_IDLE,I2C_IDLE,I2C_IDLE}; volatile uint32_t timeout[I2C_PORT_NUM] = {0, 0, 0}; volatile uint8_t I2CMasterBuffer[I2C_PORT_NUM][BUFSIZE]; volatile uint8_t I2CSlaveBuffer[I2C_PORT_NUM][BUFSIZE]; volatile uint32_t I2CCount[I2C_PORT_NUM] = {0, 0, 0}; volatile uint32_t I2CReadLength[I2C_PORT_NUM]; volatile uint32_t I2CWriteLength[I2C_PORT_NUM]; volatile uint32_t RdIndex0 = 0, RdIndex1 = 0, RdIndex2 = 0; volatile uint32_t WrIndex0 = 0, WrIndex1 = 0, WrIndex2 = 0; /* From device to device, the I2C communication protocol may vary, in the example below, the protocol uses repeated start to read data from or write to the device: For master read: the sequence is: STA,Addr(W),offset,RE-STA,Addr(r),data...STO for master write: the sequence is: STA,Addr(W),offset,RE-STA,Addr(w),data...STO Thus, in state 8, the address is always WRITE. in state 10, the address could be READ or WRITE depending on the I2C command. */ /***************************************************************************** ** Function name:I2C_IRQHandler ** ** Descriptions:I2C interrupt handler, deal with master mode only. ** ** parameters:None ** Returned value:None ** *****************************************************************************/ void I2C0_IRQHandler(void) { uint8_t StatValue; timeout[0] = 0; /* this handler deals with master read and master write only */ StatValue = LPC_I2C0->STAT; switch ( StatValue ) { case 0x08:/* A Start condition is issued. */ WrIndex0 = 0; LPC_I2C0->DAT = I2CMasterBuffer[0][WrIndex0++]; LPC_I2C0->CONCLR = (I2CONCLR_SIC | I2CONCLR_STAC); break; case 0x10:/* A repeated started is issued */ RdIndex0 = 0; /* Send SLA with R bit set, */ LPC_I2C0->DAT = I2CMasterBuffer[0][WrIndex0++]; LPC_I2C0->CONCLR = (I2CONCLR_SIC | I2CONCLR_STAC); break; case 0x18:/* Regardless, it's a ACK */ if ( I2CWriteLength[0] == 1 ) { LPC_I2C0->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[0] = I2C_NO_DATA; } else { LPC_I2C0->DAT = I2CMasterBuffer[0][WrIndex0++]; } LPC_I2C0->CONCLR = I2CONCLR_SIC; break; case 0x28:/* Data byte has been transmitted, regardless ACK or NACK */ if ( WrIndex0 < I2CWriteLength[0] ) { LPC_I2C0->DAT = I2CMasterBuffer[0][WrIndex0++]; /* this should be the last one */ } else { if ( I2CReadLength[0] != 0 ) { LPC_I2C0->CONSET = I2CONSET_STA;/* Set Repeated-start flag */ } else { LPC_I2C0->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[0] = I2C_OK; } } LPC_I2C0->CONCLR = I2CONCLR_SIC; break; case 0x30: LPC_I2C0->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[0] = I2C_NACK_ON_DATA; LPC_I2C0->CONCLR = I2CONCLR_SIC; break; case 0x40:/* Master Receive, SLA_R has been sent */ if ( (RdIndex0 + 1) < I2CReadLength[0] ) { /* Will go to State 0x50 */ LPC_I2C0->CONSET = I2CONSET_AA;/* assert ACK after data is received */ } else { /* Will go to State 0x58 */ LPC_I2C0->CONCLR = I2CONCLR_AAC;/* assert NACK after data is received */ } LPC_I2C0->CONCLR = I2CONCLR_SIC; break; case 0x50:/* Data byte has been received, regardless following ACK or NACK */ I2CSlaveBuffer[0][RdIndex0++] = LPC_I2C0->DAT; if ( (RdIndex0 + 1) < I2CReadLength[0] ) { LPC_I2C0->CONSET = I2CONSET_AA;/* assert ACK after data is received */ } else { LPC_I2C0->CONCLR = I2CONCLR_AAC;/* assert NACK on last byte */ } LPC_I2C0->CONCLR = I2CONCLR_SIC; break; case 0x58: I2CSlaveBuffer[0][RdIndex0++] = LPC_I2C0->DAT; I2CMasterState[0] = I2C_OK; LPC_I2C0->CONSET = I2CONSET_STO;/* Set Stop flag */ LPC_I2C0->CONCLR = I2CONCLR_SIC;/* Clear SI flag */ break; case 0x20:/* regardless, it's a NACK */ case 0x48: LPC_I2C0->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[0] = I2C_NACK_ON_ADDRESS; LPC_I2C0->CONCLR = I2CONCLR_SIC; break; case 0x38:/* Arbitration lost, in this example, we don't deal with multiple master situation */ default: I2CMasterState[0] = I2C_ARBITRATION_LOST; LPC_I2C0->CONCLR = I2CONCLR_SIC; break; } return; } /***************************************************************************** ** Function name:I2C_IRQHandler ** ** Descriptions:I2C interrupt handler, deal with master mode only. ** ** parameters:None ** Returned value:None ** *****************************************************************************/ void I2C1_IRQHandler(void) { uint8_t StatValue; timeout[1] = 0; /* this handler deals with master read and master write only */ StatValue = LPC_I2C1->STAT; switch ( StatValue ) { case 0x08:/* A Start condition is issued. */ WrIndex1 = 0; LPC_I2C1->DAT = I2CMasterBuffer[1][WrIndex1++]; LPC_I2C1->CONCLR = (I2CONCLR_SIC | I2CONCLR_STAC); break; case 0x10:/* A repeated started is issued */ RdIndex1 = 0; /* Send SLA with R bit set, */ LPC_I2C1->DAT = I2CMasterBuffer[1][WrIndex1++]; LPC_I2C1->CONCLR = (I2CONCLR_SIC | I2CONCLR_STAC); break; case 0x18:/* Regardless, it's a ACK */ if ( I2CWriteLength[1] == 1 ) { LPC_I2C1->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[1] = I2C_NO_DATA; } else { LPC_I2C1->DAT = I2CMasterBuffer[1][WrIndex1++]; } LPC_I2C1->CONCLR = I2CONCLR_SIC; break; case 0x28:/* Data byte has been transmitted, regardless ACK or NACK */ if ( WrIndex1 < I2CWriteLength[1] ) { LPC_I2C1->DAT = I2CMasterBuffer[1][WrIndex1++]; /* this should be the last one */ } else { if ( I2CReadLength[1] != 0 ) { LPC_I2C1->CONSET = I2CONSET_STA;/* Set Repeated-start flag */ } else { LPC_I2C1->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[1] = I2C_OK; } } LPC_I2C1->CONCLR = I2CONCLR_SIC; break; case 0x30: LPC_I2C1->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[1] = I2C_NACK_ON_DATA; LPC_I2C1->CONCLR = I2CONCLR_SIC; break; case 0x40:/* Master Receive, SLA_R has been sent */ if ( (RdIndex1 + 1) < I2CReadLength[1] ) { /* Will go to State 0x50 */ LPC_I2C1->CONSET = I2CONSET_AA;/* assert ACK after data is received */ } else { /* Will go to State 0x58 */ LPC_I2C1->CONCLR = I2CONCLR_AAC;/* assert NACK after data is received */ } LPC_I2C1->CONCLR = I2CONCLR_SIC; break; case 0x50:/* Data byte has been received, regardless following ACK or NACK */ I2CSlaveBuffer[1][RdIndex1++] = LPC_I2C1->DAT; if ( (RdIndex1 + 1) < I2CReadLength[1] ) { LPC_I2C1->CONSET = I2CONSET_AA;/* assert ACK after data is received */ } else { LPC_I2C1->CONCLR = I2CONCLR_AAC;/* assert NACK on last byte */ } LPC_I2C1->CONCLR = I2CONCLR_SIC; break; case 0x58: I2CSlaveBuffer[1][RdIndex1++] = LPC_I2C1->DAT; I2CMasterState[1] = I2C_OK; LPC_I2C1->CONSET = I2CONSET_STO;/* Set Stop flag */ LPC_I2C1->CONCLR = I2CONCLR_SIC;/* Clear SI flag */ break; case 0x20:/* regardless, it's a NACK */ case 0x48: LPC_I2C1->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[1] = I2C_NACK_ON_ADDRESS; LPC_I2C1->CONCLR = I2CONCLR_SIC; break; case 0x38:/* Arbitration lost, in this example, we don't deal with multiple master situation */ default: I2CMasterState[1] = I2C_ARBITRATION_LOST; LPC_I2C1->CONCLR = I2CONCLR_SIC; break; } return; } /***************************************************************************** ** Function name:I2C_IRQHandler ** ** Descriptions:I2C interrupt handler, deal with master mode only. ** ** parameters:None ** Returned value:None ** *****************************************************************************/ void I2C2_IRQHandler(void) { uint8_t StatValue; timeout[2] = 0; /* this handler deals with master read and master write only */ StatValue = LPC_I2C2->STAT; switch ( StatValue ) { case 0x08:/* A Start condition is issued. */ WrIndex2 = 0; LPC_I2C2->DAT = I2CMasterBuffer[2][WrIndex2++]; LPC_I2C2->CONCLR = (I2CONCLR_SIC | I2CONCLR_STAC); break; case 0x10:/* A repeated started is issued */ RdIndex2 = 0; /* Send SLA with R bit set, */ LPC_I2C2->DAT = I2CMasterBuffer[2][WrIndex2++]; LPC_I2C2->CONCLR = (I2CONCLR_SIC | I2CONCLR_STAC); break; case 0x18:/* Regardless, it's a ACK */ if ( I2CWriteLength[2] == 1 ) { LPC_I2C2->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[2] = I2C_NO_DATA; } else { LPC_I2C2->DAT = I2CMasterBuffer[2][WrIndex2++]; } LPC_I2C2->CONCLR = I2CONCLR_SIC; break; case 0x28:/* Data byte has been transmitted, regardless ACK or NACK */ if ( WrIndex2 < I2CWriteLength[2] ) { LPC_I2C2->DAT = I2CMasterBuffer[2][WrIndex2++]; /* this should be the last one */ } else { if ( I2CReadLength[2] != 0 ) { LPC_I2C2->CONSET = I2CONSET_STA;/* Set Repeated-start flag */ } else { LPC_I2C2->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[2] = I2C_OK; } } LPC_I2C2->CONCLR = I2CONCLR_SIC; break; case 0x30: LPC_I2C2->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[2] = I2C_NACK_ON_DATA; LPC_I2C2->CONCLR = I2CONCLR_SIC; break; case 0x40:/* Master Receive, SLA_R has been sent */ if ( (RdIndex2 + 1) < I2CReadLength[2] ) { /* Will go to State 0x50 */ LPC_I2C2->CONSET = I2CONSET_AA;/* assert ACK after data is received */ } else { /* Will go to State 0x58 */ LPC_I2C2->CONCLR = I2CONCLR_AAC;/* assert NACK after data is received */ } LPC_I2C2->CONCLR = I2CONCLR_SIC; break; case 0x50:/* Data byte has been received, regardless following ACK or NACK */ I2CSlaveBuffer[2][RdIndex2++] = LPC_I2C2->DAT; if ( (RdIndex2 + 1) < I2CReadLength[2] ) { LPC_I2C2->CONSET = I2CONSET_AA;/* assert ACK after data is received */ } else { LPC_I2C2->CONCLR = I2CONCLR_AAC;/* assert NACK on last byte */ } LPC_I2C2->CONCLR = I2CONCLR_SIC; break; case 0x58: I2CSlaveBuffer[2][RdIndex2++] = LPC_I2C2->DAT; I2CMasterState[2] = I2C_OK; LPC_I2C2->CONSET = I2CONSET_STO;/* Set Stop flag */ LPC_I2C2->CONCLR = I2CONCLR_SIC;/* Clear SI flag */ break; case 0x20:/* regardless, it's a NACK */ case 0x48: LPC_I2C2->CONSET = I2CONSET_STO; /* Set Stop flag */ I2CMasterState[2] = I2C_NACK_ON_ADDRESS; LPC_I2C2->CONCLR = I2CONCLR_SIC; break; case 0x38:/* Arbitration lost, in this example, we don't deal with multiple master situation */ default: I2CMasterState[2] = I2C_ARBITRATION_LOST; LPC_I2C2->CONCLR = I2CONCLR_SIC; break; } return; } /***************************************************************************** ** Function name:I2CStart ** ** Descriptions:Create I2C start condition, a timeout **value is set if the I2C never gets started, **and timed out. It's a fatal error. ** ** parameters:None ** Returned value:true or false, return false if timed out ** *****************************************************************************/ uint32_t I2CStart( uint32_t portNum ) { uint32_t retVal = FALSE; timeout[portNum] = 0; /*--- Issue a start condition ---*/ LPC_I2C[portNum]->CONSET = I2CONSET_STA;/* Set Start flag */ /*--- Wait until START transmitted ---*/ while( 1 ) { if ( I2CMasterState[portNum] == I2C_STARTED ) { retVal = TRUE; break; } if ( timeout[portNum] >= MAX_TIMEOUT ) { retVal = FALSE; break; } timeout[portNum]++; } return( retVal ); } /***************************************************************************** ** Function name:I2CStop ** ** Descriptions:Set the I2C stop condition, if the routine **never exit, it's a fatal bus error. ** ** parameters:None ** Returned value:true or never return ** *****************************************************************************/ uint32_t I2CStop( uint32_t portNum ) { LPC_I2C[portNum]->CONSET = I2CONSET_STO; /* Set Stop flag */ LPC_I2C[portNum]->CONCLR = I2CONCLR_SIC; /* Clear SI flag */ /*--- Wait for STOP detected ---*/ while( LPC_I2C[portNum]->CONSET & I2CONSET_STO ); return TRUE; } /***************************************************************************** ** Function name:I2CInit ** ** Descriptions:Initialize I2C controller as a master ** ** parameters:None ** Returned value:None ** *****************************************************************************/ void I2C0Init( void ) { LPC_SC->PCONP |= (1 << 7); /* set PIO0.27 and PIO0.28 to I2C0 SDA and SCL */ /* function to 01 on both SDA and SCL. */ LPC_PINCON->PINSEL1 &= ~((0x03<<22)|(0x03<<24)); LPC_PINCON->PINSEL1 |= ((0x01<<22)|(0x01<<24)); /*--- Clear flags ---*/ LPC_I2C0->CONCLR = I2CONCLR_AAC | I2CONCLR_SIC | I2CONCLR_STAC | I2CONCLR_I2ENC; /*--- Reset registers ---*/ #if FAST_MODE_PLUS LPC_PINCON->I2CPADCFG |= ((0x1<<0)|(0x1<<2)); LPC_I2C0->SCLL = I2SCLL_HS_SCLL; LPC_I2C0->SCLH = I2SCLH_HS_SCLH; #else LPC_PINCON->I2CPADCFG &= ~((0x1<<0)|(0x1<<2)); LPC_I2C0->SCLL = I2SCLL_SCLL; LPC_I2C0->SCLH = I2SCLH_SCLH; #endif /* Install interrupt handler */ NVIC_EnableIRQ(I2C0_IRQn); LPC_I2C0->CONSET = I2CONSET_I2EN; return; } /***************************************************************************** ** Function name:I2C1Init ** ** Descriptions:Initialize I2C controller as a master ** ** parameters:None ** Returned value:None ** *****************************************************************************/ void I2C1Init( void ) { LPC_SC->PCONP |= (1 << 19); #if 0 /* set PIO0.0 and PIO0.1 to I2C1 SDA and SCL */ /* function to 11 on both SDA and SCL. */ LPC_PINCON->PINSEL0 &= ~((0x3<<0)|(0x3<<2)); LPC_PINCON->PINSEL0 |= ((0x3<<0)|(0x3<<2)); LPC_PINCON->PINMODE0 &= ~((0x3<<0)|(0x3<<2)); LPC_PINCON->PINMODE0 |= ((0x2<<0)|(0x2<<2));/* No pull-up no pull-down */ LPC_PINCON->PINMODE_OD0 |= ((0x01<<0)|(0x1<<1));/* Open drain */ #endif #if 1 /* set PIO0.19 and PIO0.20 to I2C1 SDA and SCL */ /* function to 11 on both SDA and SCL. */ LPC_PINCON->PINSEL1 &= ~((0x3<<6)|(0x3<<8)); LPC_PINCON->PINSEL1 |= ((0x3<<6)|(0x3<<8)); LPC_PINCON->PINMODE1 &= ~((0x3<<6)|(0x3<<8)); LPC_PINCON->PINMODE1 |= ((0x2<<6)|(0x2<<8));/* No pull-up no pull-down */ LPC_PINCON->PINMODE_OD0 |= ((0x1<<19)|(0x1<<20)); #endif /*--- Clear flags ---*/ LPC_I2C1->CONCLR = I2CONCLR_AAC | I2CONCLR_SIC | I2CONCLR_STAC | I2CONCLR_I2ENC; /*--- Reset registers ---*/ LPC_I2C1->SCLL = I2SCLL_SCLL; LPC_I2C1->SCLH = I2SCLH_SCLH; /* Install interrupt handler */ NVIC_EnableIRQ(I2C1_IRQn); LPC_I2C1->CONSET = I2CONSET_I2EN; return; } /***************************************************************************** ** Function name:I2C2Init ** ** Descriptions:Initialize I2C controller as a master ** ** parameters:None ** Returned value:None ** *****************************************************************************/ void I2C2Init( void ) { LPC_SC->PCONP |= (1 << 26); /* set PIO0.10 and PIO0.11 to I2C2 SDA and SCL */ /* function to 10 on both SDA and SCL. */ LPC_PINCON->PINSEL0 &= ~((0x03<<20)|(0x03<<22)); LPC_PINCON->PINSEL0 |= ((0x02<<20)|(0x02<<22)); LPC_PINCON->PINMODE0 &= ~((0x03<<20)|(0x03<<22)); LPC_PINCON->PINMODE0 |= ((0x02<<20)|(0x2<<22));/* No pull-up no pull-down */ LPC_PINCON->PINMODE_OD0 |= ((0x01<<10)|(0x1<<11)); /*--- Clear flags ---*/ LPC_I2C2->CONCLR = I2CONCLR_AAC | I2CONCLR_SIC | I2CONCLR_STAC | I2CONCLR_I2ENC; /*--- Reset registers ---*/ LPC_I2C2->SCLL = I2SCLL_SCLL; LPC_I2C2->SCLH = I2SCLH_SCLH; /* Install interrupt handler */ NVIC_EnableIRQ(I2C2_IRQn); LPC_I2C2->CONSET = I2CONSET_I2EN; return; } /***************************************************************************** ** Function name:I2CEngine ** ** Descriptions:The routine to complete a I2C transaction **from start to stop. All the intermitten **steps are handled in the interrupt handler. **Before this routine is called, the read **length, write length, I2C master buffer, **and I2C command fields need to be filled. **see i2cmst.c for more details. ** ** parameters:I2C port number ** Returned value:master state of current I2C port. ** *****************************************************************************/ uint32_t I2CEngine( uint32_t portNum ) { /*--- Issue a start condition ---*/ LPC_I2C[portNum]->CONSET = I2CONSET_STA;/* Set Start flag */ I2CMasterState[portNum] = I2C_BUSY; while ( I2CMasterState[portNum] == I2C_BUSY ) { if ( timeout[portNum] >= MAX_TIMEOUT ) { I2CMasterState[portNum] = I2C_TIME_OUT; break; } timeout[portNum]++; } LPC_I2C[portNum]->CONCLR = I2CONCLR_STAC; return ( I2CMasterState[portNum] ); } /****************************************************************************** ** End Of File ******************************************************************************/ |
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Original Attachment has been moved to: I2C.rar