LPC11U35 Led Blink

mohd_ — Tue, 16 Nov 2021 07:05:33 GMT

Hi,

I try to do simple led blink using LPC11u35 dip module. I use LPC-Link2 and connect to swd pins on LPC11u35 to program the flash.

Below is the change to system_LPCUUxx.c that I've made to use the internal clock of the chip;

#define CLOCK_SETUP 1
#define SYSOSCCTRL_Val 0x00000000 // Reset: 0x000
#define WDTOSCCTRL_Val 0x00000000 // Reset: 0x000
#define SYSPLLCTRL_Val 0x00000023 // Reset: 0x000
#define SYSPLLCLKSEL_Val 0x00000000 // Reset: 0x000
#define MAINCLKSEL_Val 0x00000003 // Reset: 0x000
#define SYSAHBCLKDIV_Val 0x00000001 // Reset: 0x001
#define USBPLLCTRL_Val 0x00000023 // Reset: 0x000
#define USBPLLCLKSEL_Val 0x00000001 // Reset: 0x000
#define USBCLKSEL_Val 0x00000000 // Reset: 0x000
#define USBCLKDIV_Val 0x00000001 // Reset: 0x001

/*
//-------- <<< end of configuration section >>> ------------------------------

Here is the full code of system_LPCUUxx.c.

/****************************************************************************** * @file system_LPC11Uxx.c * @purpose CMSIS Cortex-M3 Device Peripheral Access Layer Source File * for the NXP LPC13xx Device Series * @version V1.10 * @date 24. November 2010 * * @note * Copyright (C) 2009-2010 ARM Limited. All rights reserved. * * @par * ARM Limited (ARM) is supplying this software for use with Cortex-M * processor based microcontrollers. This file can be freely distributed * within development tools that are supporting such ARM based processors. * * @par * 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. * ******************************************************************************/ #include <stdint.h> #include "LPC11Uxx.h" /* //-------- <<< Use Configuration Wizard in Context Menu >>> ------------------ */ /*--------------------- Clock Configuration ---------------------------------- // // <e> Clock Configuration // <h> System Oscillator Control Register (SYSOSCCTRL) // <o1.0> BYPASS: System Oscillator Bypass Enable // If enabled then PLL input (sys_osc_clk) is fed // directly from XTALIN and XTALOUT pins. // <o1.9> FREQRANGE: System Oscillator Frequency Range // Determines frequency range for Low-power oscillator. // <0=> 1 - 20 MHz // <1=> 15 - 25 MHz // </h> // // <h> Watchdog Oscillator Control Register (WDTOSCCTRL) // <o2.0..4> DIVSEL: Select Divider for Fclkana // wdt_osc_clk = Fclkana/ (2 � (1 + DIVSEL)) // <0-31> // <o2.5..8> FREQSEL: Select Watchdog Oscillator Analog Output Frequency (Fclkana) // <0=> Undefined // <1=> 0.5 MHz // <2=> 0.8 MHz // <3=> 1.1 MHz // <4=> 1.4 MHz // <5=> 1.6 MHz // <6=> 1.8 MHz // <7=> 2.0 MHz // <8=> 2.2 MHz // <9=> 2.4 MHz // <10=> 2.6 MHz // <11=> 2.7 MHz // <12=> 2.9 MHz // <13=> 3.1 MHz // <14=> 3.2 MHz // <15=> 3.4 MHz // </h> // // <h> System PLL Control Register (SYSPLLCTRL) // F_clkout = M * F_clkin = F_CCO / (2 * P) // F_clkin must be in the range of 10 MHz to 25 MHz // F_CCO must be in the range of 156 MHz to 320 MHz // <o3.0..4> MSEL: Feedback Divider Selection // M = MSEL + 1 // <0-31> // <o3.5..6> PSEL: Post Divider Selection // <0=> P = 1 // <1=> P = 2 // <2=> P = 4 // <3=> P = 8 // </h> // // <h> System PLL Clock Source Select Register (SYSPLLCLKSEL) // <o4.0..1> SEL: System PLL Clock Source // <0=> IRC Oscillator // <1=> System Oscillator // <2=> Reserved // <3=> Reserved // </h> // // <h> Main Clock Source Select Register (MAINCLKSEL) // <o5.0..1> SEL: Clock Source for Main Clock // <0=> IRC Oscillator // <1=> Input Clock to System PLL // <2=> WDT Oscillator // <3=> System PLL Clock Out // </h> // // <h> System AHB Clock Divider Register (SYSAHBCLKDIV) // <o6.0..7> DIV: System AHB Clock Divider // Divides main clock to provide system clock to core, memories, and peripherals. // 0 = is disabled // <0-255> // </h> // // <h> USB PLL Control Register (USBPLLCTRL) // F_clkout = M * F_clkin = F_CCO / (2 * P) // F_clkin must be in the range of 10 MHz to 25 MHz // F_CCO must be in the range of 156 MHz to 320 MHz // <o7.0..4> MSEL: Feedback Divider Selection // M = MSEL + 1 // <0-31> // <o7.5..6> PSEL: Post Divider Selection // <0=> P = 1 // <1=> P = 2 // <2=> P = 4 // <3=> P = 8 // </h> // // <h> USB PLL Clock Source Select Register (USBPLLCLKSEL) // <o8.0..1> SEL: USB PLL Clock Source // USB PLL clock source must be switched to System Oscillator for correct USB operation // <0=> IRC Oscillator // <1=> System Oscillator // <2=> Reserved // <3=> Reserved // </h> // // <h> USB Clock Source Select Register (USBCLKSEL) // <o9.0..1> SEL: System PLL Clock Source // <0=> USB PLL out // <1=> Main clock // <2=> Reserved // <3=> Reserved // </h> // // <h> USB Clock Divider Register (USBCLKDIV) // <o10.0..7> DIV: USB Clock Divider // Divides USB clock to 48 MHz. // 0 = is disabled // <0-255> // </h> // </e> */ #define CLOCK_SETUP 1 #define SYSOSCCTRL_Val 0x00000000 // Reset: 0x000 #define WDTOSCCTRL_Val 0x00000000 // Reset: 0x000 #define SYSPLLCTRL_Val 0x00000023 // Reset: 0x000 #define SYSPLLCLKSEL_Val 0x00000000 // Reset: 0x000 #define MAINCLKSEL_Val 0x00000003 // Reset: 0x000 #define SYSAHBCLKDIV_Val 0x00000001 // Reset: 0x001 #define USBPLLCTRL_Val 0x00000023 // Reset: 0x000 #define USBPLLCLKSEL_Val 0x00000001 // Reset: 0x000 #define USBCLKSEL_Val 0x00000000 // Reset: 0x000 #define USBCLKDIV_Val 0x00000001 // Reset: 0x001 /* //-------- <<< end of configuration section >>> ------------------------------ */ /*---------------------------------------------------------------------------- Check the register settings *----------------------------------------------------------------------------*/ #define CHECK_RANGE(val, min, max) ((val < min) || (val > max)) #define CHECK_RSVD(val, mask) (val & mask) /* Clock Configuration -------------------------------------------------------*/ #if (CHECK_RSVD((SYSOSCCTRL_Val), ~0x00000003)) #error "SYSOSCCTRL: Invalid values of reserved bits!" #endif #if (CHECK_RSVD((WDTOSCCTRL_Val), ~0x000001FF)) #error "WDTOSCCTRL: Invalid values of reserved bits!" #endif #if (CHECK_RANGE((SYSPLLCLKSEL_Val), 0, 2)) #error "SYSPLLCLKSEL: Value out of range!" #endif #if (CHECK_RSVD((SYSPLLCTRL_Val), ~0x000001FF)) #error "SYSPLLCTRL: Invalid values of reserved bits!" #endif #if (CHECK_RSVD((MAINCLKSEL_Val), ~0x00000003)) #error "MAINCLKSEL: Invalid values of reserved bits!" #endif #if (CHECK_RANGE((SYSAHBCLKDIV_Val), 0, 255)) #error "SYSAHBCLKDIV: Value out of range!" #endif #if (CHECK_RANGE((USBPLLCLKSEL_Val), 0, 1)) #error "USBPLLCLKSEL: Value out of range!" #endif #if (CHECK_RSVD((USBPLLCTRL_Val), ~0x000001FF)) #error "USBPLLCTRL: Invalid values of reserved bits!" #endif #if (CHECK_RANGE((USBCLKSEL_Val), 0, 1)) #error "USBCLKSEL: Value out of range!" #endif #if (CHECK_RANGE((USBCLKDIV_Val), 0, 255)) #error "USBCLKDIV: Value out of range!" #endif /*---------------------------------------------------------------------------- DEFINES *----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- Define clocks *----------------------------------------------------------------------------*/ #define __XTAL (12000000UL) /* Oscillator frequency */ #define __SYS_OSC_CLK ( __XTAL) /* Main oscillator frequency */ #define __IRC_OSC_CLK (12000000UL) /* Internal RC oscillator frequency */ #define __FREQSEL ((WDTOSCCTRL_Val >> 5) & 0x0F) #define __DIVSEL (((WDTOSCCTRL_Val & 0x1F) << 1) + 2) #if (CLOCK_SETUP) /* Clock Setup */ #if (__FREQSEL == 0) #define __WDT_OSC_CLK ( 0) /* undefined */ #elif (__FREQSEL == 1) #define __WDT_OSC_CLK ( 500000 / __DIVSEL) #elif (__FREQSEL == 2) #define __WDT_OSC_CLK ( 800000 / __DIVSEL) #elif (__FREQSEL == 3) #define __WDT_OSC_CLK (1100000 / __DIVSEL) #elif (__FREQSEL == 4) #define __WDT_OSC_CLK (1400000 / __DIVSEL) #elif (__FREQSEL == 5) #define __WDT_OSC_CLK (1600000 / __DIVSEL) #elif (__FREQSEL == 6) #define __WDT_OSC_CLK (1800000 / __DIVSEL) #elif (__FREQSEL == 7) #define __WDT_OSC_CLK (2000000 / __DIVSEL) #elif (__FREQSEL == 8) #define __WDT_OSC_CLK (2200000 / __DIVSEL) #elif (__FREQSEL == 9) #define __WDT_OSC_CLK (2400000 / __DIVSEL) #elif (__FREQSEL == 10) #define __WDT_OSC_CLK (2600000 / __DIVSEL) #elif (__FREQSEL == 11) #define __WDT_OSC_CLK (2700000 / __DIVSEL) #elif (__FREQSEL == 12) #define __WDT_OSC_CLK (2900000 / __DIVSEL) #elif (__FREQSEL == 13) #define __WDT_OSC_CLK (3100000 / __DIVSEL) #elif (__FREQSEL == 14) #define __WDT_OSC_CLK (3200000 / __DIVSEL) #else #define __WDT_OSC_CLK (3400000 / __DIVSEL) #endif /* sys_pllclkin calculation */ #if ((SYSPLLCLKSEL_Val & 0x03) == 0) #define __SYS_PLLCLKIN (__IRC_OSC_CLK) #elif ((SYSPLLCLKSEL_Val & 0x03) == 1) #define __SYS_PLLCLKIN (__SYS_OSC_CLK) #else #define __SYS_PLLCLKIN (0) #endif #define __SYS_PLLCLKOUT (__SYS_PLLCLKIN * ((SYSPLLCTRL_Val & 0x01F) + 1)) /* main clock calculation */ #if ((MAINCLKSEL_Val & 0x03) == 0) #define __MAIN_CLOCK (__IRC_OSC_CLK) #elif ((MAINCLKSEL_Val & 0x03) == 1) #define __MAIN_CLOCK (__SYS_PLLCLKIN) #elif ((MAINCLKSEL_Val & 0x03) == 2) #if (__FREQSEL == 0) #error "MAINCLKSEL: WDT Oscillator selected but FREQSEL is undefined!" #else #define __MAIN_CLOCK (__WDT_OSC_CLK) #endif #elif ((MAINCLKSEL_Val & 0x03) == 3) #define __MAIN_CLOCK (__SYS_PLLCLKOUT) #else #define __MAIN_CLOCK (0) #endif #define __SYSTEM_CLOCK (__MAIN_CLOCK / SYSAHBCLKDIV_Val) #else #define __SYSTEM_CLOCK (__IRC_OSC_CLK) #endif // CLOCK_SETUP /*---------------------------------------------------------------------------- Clock Variable definitions *----------------------------------------------------------------------------*/ uint32_t SystemCoreClock = __SYSTEM_CLOCK;/*!< System Clock Frequency (Core Clock)*/ /*---------------------------------------------------------------------------- Clock functions *----------------------------------------------------------------------------*/ void SystemCoreClockUpdate (void) /* Get Core Clock Frequency */ { uint32_t wdt_osc = 0; /* Determine clock frequency according to clock register values */ switch ((LPC_SYSCON->WDTOSCCTRL >> 5) & 0x0F) { case 0: wdt_osc = 0; break; case 1: wdt_osc = 500000; break; case 2: wdt_osc = 800000; break; case 3: wdt_osc = 1100000; break; case 4: wdt_osc = 1400000; break; case 5: wdt_osc = 1600000; break; case 6: wdt_osc = 1800000; break; case 7: wdt_osc = 2000000; break; case 8: wdt_osc = 2200000; break; case 9: wdt_osc = 2400000; break; case 10: wdt_osc = 2600000; break; case 11: wdt_osc = 2700000; break; case 12: wdt_osc = 2900000; break; case 13: wdt_osc = 3100000; break; case 14: wdt_osc = 3200000; break; case 15: wdt_osc = 3400000; break; } wdt_osc /= ((LPC_SYSCON->WDTOSCCTRL & 0x1F) << 1) + 2; switch (LPC_SYSCON->MAINCLKSEL & 0x03) { case 0: /* Internal RC oscillator */ SystemCoreClock = __IRC_OSC_CLK; break; case 1: /* Input Clock to System PLL */ switch (LPC_SYSCON->SYSPLLCLKSEL & 0x03) { case 0: /* Internal RC oscillator */ SystemCoreClock = __IRC_OSC_CLK; break; case 1: /* System oscillator */ SystemCoreClock = __SYS_OSC_CLK; break; case 2: /* Reserved */ case 3: /* Reserved */ SystemCoreClock = 0; break; } break; case 2: /* WDT Oscillator */ SystemCoreClock = wdt_osc; break; case 3: /* System PLL Clock Out */ switch (LPC_SYSCON->SYSPLLCLKSEL & 0x03) { case 0: /* Internal RC oscillator */ if (LPC_SYSCON->SYSPLLCTRL & 0x180) { SystemCoreClock = __IRC_OSC_CLK; } else { SystemCoreClock = __IRC_OSC_CLK * ((LPC_SYSCON->SYSPLLCTRL & 0x01F) + 1); } break; case 1: /* System oscillator */ if (LPC_SYSCON->SYSPLLCTRL & 0x180) { SystemCoreClock = __SYS_OSC_CLK; } else { SystemCoreClock = __SYS_OSC_CLK * ((LPC_SYSCON->SYSPLLCTRL & 0x01F) + 1); } break; case 2: /* Reserved */ case 3: /* Reserved */ SystemCoreClock = 0; break; } break; } SystemCoreClock /= LPC_SYSCON->SYSAHBCLKDIV; } /** * Initialize the system * * @param none * @return none * * @brief Setup the microcontroller system. * Initialize the System. */ void SystemInit (void) { volatile uint32_t i; #if (CLOCK_SETUP) /* Clock Setup */ #if ((SYSPLLCLKSEL_Val & 0x03) == 1) LPC_SYSCON->PDRUNCFG &= ~(1 << 5); /* Power-up System Osc */ LPC_SYSCON->SYSOSCCTRL = SYSOSCCTRL_Val; for (i = 0; i < 200; i++) __NOP(); #endif LPC_SYSCON->SYSPLLCLKSEL = SYSPLLCLKSEL_Val; /* Select PLL Input */ LPC_SYSCON->SYSPLLCLKUEN = 0x01; /* Update Clock Source */ LPC_SYSCON->SYSPLLCLKUEN = 0x00; /* Toggle Update Register */ LPC_SYSCON->SYSPLLCLKUEN = 0x01; while (!(LPC_SYSCON->SYSPLLCLKUEN & 0x01)); /* Wait Until Updated */ #if ((MAINCLKSEL_Val & 0x03) == 3) /* Main Clock is PLL Out */ LPC_SYSCON->SYSPLLCTRL = SYSPLLCTRL_Val; LPC_SYSCON->PDRUNCFG &= ~(1 << 7); /* Power-up SYSPLL */ while (!(LPC_SYSCON->SYSPLLSTAT & 0x01)); /* Wait Until PLL Locked */ #endif #if (((MAINCLKSEL_Val & 0x03) == 2) ) LPC_SYSCON->WDTOSCCTRL = WDTOSCCTRL_Val; LPC_SYSCON->PDRUNCFG &= ~(1 << 6); /* Power-up WDT Clock */ for (i = 0; i < 200; i++) __NOP(); #endif LPC_SYSCON->MAINCLKSEL = MAINCLKSEL_Val; /* Select PLL Clock Output */ LPC_SYSCON->MAINCLKUEN = 0x01; /* Update MCLK Clock Source */ LPC_SYSCON->MAINCLKUEN = 0x00; /* Toggle Update Register */ LPC_SYSCON->MAINCLKUEN = 0x01; while (!(LPC_SYSCON->MAINCLKUEN & 0x01)); /* Wait Until Updated */ LPC_SYSCON->SYSAHBCLKDIV = SYSAHBCLKDIV_Val; #if ((USBCLKDIV_Val & 0x1FF) != 0) /* USB clock is used */ LPC_SYSCON->PDRUNCFG &= ~(1 << 10); /* Power-up USB PHY */ #if ((USBCLKSEL_Val & 0x003) == 0) /* USB clock is USB PLL out */ LPC_SYSCON->PDRUNCFG &= ~(1 << 8); /* Power-up USB PLL */ LPC_SYSCON->USBPLLCLKSEL = USBPLLCLKSEL_Val; /* Select PLL Input */ LPC_SYSCON->USBPLLCLKUEN = 0x01; /* Update Clock Source */ LPC_SYSCON->USBPLLCLKUEN = 0x00; /* Toggle Update Register */ LPC_SYSCON->USBPLLCLKUEN = 0x01; while (!(LPC_SYSCON->USBPLLCLKUEN & 0x01)); /* Wait Until Updated */ LPC_SYSCON->USBPLLCTRL = USBPLLCTRL_Val; while (!(LPC_SYSCON->USBPLLSTAT & 0x01)); /* Wait Until PLL Locked */ LPC_SYSCON->USBCLKSEL = 0x00; /* Select USB PLL */ #endif LPC_SYSCON->USBCLKSEL = USBCLKSEL_Val; /* Select USB Clock */ LPC_SYSCON->USBCLKDIV = USBCLKDIV_Val; /* Set USB clock divider */ #else /* USB clock is not used */ LPC_SYSCON->PDRUNCFG |= (1 << 10); /* Power-down USB PHY */ LPC_SYSCON->PDRUNCFG |= (1 << 8); /* Power-down USB PLL */ #endif #endif /* System clock to the IOCON needs to be enabled or most of the I/O related peripherals won't work. */ LPC_SYSCON->SYSAHBCLKCTRL |= (1<<16); }

Here is my main code;

/***************************************************************************** * * Copyright(C) 2012, Embedded Artists AB * All rights reserved. * * This project is based on Code Red Technologies systick example * ****************************************************************************** * 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. * Embedded Artists AB 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. Embedded Artists AB * reserves the right to make changes in the software without * notification. Embedded Artists AB also make no representation or * warranty that such application will be suitable for the specified * use without further testing or modification. *****************************************************************************/ /****************************************************************************** * Includes *****************************************************************************/ #ifdef __USE_CMSIS #include "LPC11Uxx.h" #endif #include <cr_section_macros.h> #include <NXP/crp.h> #include "gpio.h" /****************************************************************************** * Typedef and defines *****************************************************************************/ // p0.7 is connected to LED3 on LPC11U35 QSB Board #define LED_PORT 0 // Port for led #define LED_BIT 7 // Bit on port for led #define LED_ON 1 // Level to set port to turn on led #define LED_OFF 0 // Level to set port to turn off led // delay when toggling the LED #define DELAY_LEN_MS 500 // Variable to store CRP value in. Will be placed automatically // by the linker when "Enable Code Read Protect" selected. // See crp.h header for more information __CRP const unsigned int CRP_WORD = CRP_NO_CRP ; /****************************************************************************** * Local variables *****************************************************************************/ static volatile uint32_t msTicks; /****************************************************************************** * Local functions *****************************************************************************/ /****************************************************************************** * * Description: * Delay function * * Params: * ms - number of milliseconds to wait * *****************************************************************************/ __INLINE static void delay_ms (uint32_t ms) { uint32_t curTicks; curTicks = msTicks; while ((msTicks - curTicks) < ms); } /****************************************************************************** * Public functions *****************************************************************************/ void SysTick_Handler(void) { msTicks++; } /****************************************************************************** * * Description: * Main function * *****************************************************************************/ int main(void) { // Initialize GPIO GPIOInit(); // Set LED pin as output GPIOSetDir(0, 17, 1 ); GPIOSetDir(1, 15, 1 ); GPIOSetDir(0, 16, 1 ); // enable 1 ms timer tick if (SysTick_Config(SystemCoreClock / 1000)) { while (1); } while (1) { // off GPIOSetBitValue(0, 17, 1 ); GPIOSetBitValue(1, 15, 1 ); GPIOSetBitValue(0, 16, 1 ); delay_ms(DELAY_LEN_MS); // on GPIOSetBitValue(0, 17, 0 ); GPIOSetBitValue(1, 15, 0 ); GPIOSetBitValue(0, 16, 0 ); delay_ms(DELAY_LEN_MS); } }

I successfully program the flash, but the LEDs wont blink.

Is there any other setup that I need to do?

Thank you.

Re: LPC11U35 Led Blink

frank_m — Fri, 09 Jul 2021 06:45:01 GMT

Use a debugger, and see where the code gets stuck.

I suspect a while loop in the clock setup (SystemInit()).

Re: LPC11U35 Led Blink

mohd_ — Tue, 16 Nov 2021 07:03:18 GMT

@frank_m @Alice_Yang

Thank you for the suggestion.

I found the problem.

#define CLOCK_SETUP 1
#define SYSOSCCTRL_Val 0x00000000 // Reset: 0x000
#define WDTOSCCTRL_Val 0x00000000 // Reset: 0x000
#define SYSPLLCTRL_Val 0x00000023 // Reset: 0x000
#define SYSPLLCLKSEL_Val 0x00000000 // Reset: 0x000
#define MAINCLKSEL_Val 0x00000003 // Reset: 0x000
#define SYSAHBCLKDIV_Val 0x00000001 // Reset: 0x001
#define USBPLLCTRL_Val 0x00000023 // Reset: 0x000
#define USBPLLCLKSEL_Val 0x00000000 // Reset: 0x000
#define USBCLKSEL_Val 0x00000000 // Reset: 0x000
#define USBCLKDIV_Val 0x00000000 // Reset: 0x001

/*
//-------- <<< end of configuration section >>> ------------------------------

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