LPC2148

science_exp9 — Thu, 17 Oct 2019 08:22:16 GMT

Please help me to get the answer.

Re: LPC2148 ASM program need on system call, number 0x55 need to be implemented in assembly language

xiangjun_rong — Fri, 18 Oct 2019 07:09:19 GMT

Hi, Jon,

Regarding your question, I think it is dependent on what tools you are using. Unfortunately, I have not the UM of ARM7TDMI-S CPU which the LPC2148 uses. Anyway, I think the LPC21xx has core interrupt vector table, when the core executes the instruction:

SVC #0x32

an interrupt will be triggered. Based on the tools you are using, for Kinetis, as following is the vector table

You can write the ISR:

/*interrupt service routine*/
   .global SVC_Handler
   .text
   .align 2
   .type SVC_Handler function
   .func
SVC_Handler:
       /*clear interrupt*/
   push {R0,R1,LR}
    //LDR R1,=PIT_TFLG0
// LDR R0,[R1] /*dummy reading*/
   // MOV R0,#0x01
// STR R0, [R1]
   /*toggle a LED*/
   // LDR R1,=GPIOB_PDOR
// LDR R0,[R1]
    //LDR R3,=0x200000
   // EOR R0,R0,R3
   // STR R0,[R1]
   // NOP
   POP {R0,R1,PC}
   .endfunc
/*************************************

Hope it can help you

XiangJun Rong

/*
*    kinetis_sysinit.c - Default init routines for Flycatcher
*                            Kinetis ARM systems
*    Copyright �2012 Freescale semiConductor Inc. All Rights Reserved.
*/

#include "kinetis_sysinit.h"
#include "derivative.h"

/**
**===========================================================================
** External declarations
**===========================================================================
*/
#if __cplusplus
extern "C" {
#endif
extern uint32_t __vector_table[];
extern unsigned long _estack;
extern void __thumb_startup(void);
#if __cplusplus
}
#endif

/**
**===========================================================================
** Default interrupt handler
**===========================================================================
*/
void Default_Handler()
{
__asm("bkpt");
}

/**
**===========================================================================
** Reset handler
**===========================================================================
*/
void __init_hardware()
{
   SCB_VTOR = (uint32_t)__vector_table; /* Set the interrupt vector table position */
   /*
       Disable the Watchdog because it may reset the core before entering main().
       There are 2 unlock words which shall be provided in sequence before
       accessing the control register.
   */
   WDOG_UNLOCK = KINETIS_WDOG_UNLOCK_SEQ_1;
   WDOG_UNLOCK = KINETIS_WDOG_UNLOCK_SEQ_2;
   WDOG_STCTRLH = KINETIS_WDOG_DISABLED_CTRL;
}

/* Weak definitions of handlers point to Default_Handler if not implemented */
void NMI_Handler() __attribute__ ((weak, alias("Default_Handler")));
void HardFault_Handler() __attribute__ ((weak, alias("Default_Handler")));
void Mem_Manage_Fault_Handler() __attribute__ ((weak, alias("Default_Handler")));
void Bus_Fault_Handler() __attribute__ ((weak, alias("Default_Handler")));
void Usage_Fault_Handler() __attribute__ ((weak, alias("Default_Handler")));
void SVC_Handler() __attribute__ ((weak, alias("Default_Handler")));
void DebugMonitor_Handler() __attribute__ ((weak, alias("Default_Handler")));
void PendSV_Handler() __attribute__ ((weak, alias("Default_Handler")));
void SysTick_Handler() __attribute__ ((weak, alias("Default_Handler")));

void DMA0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA3_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA4_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA5_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA6_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA7_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA8_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA9_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA10_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA11_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA12_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA13_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA14_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA15_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DMA_Error_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void MCM_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void FTFL_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void Read_Collision_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void LVD_LVW_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void LLW_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void Watchdog_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void RNG_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void I2C0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void I2C1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void SPI0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void SPI1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void I2S0_Tx_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void I2S0_Rx_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART0_LON_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART0_Status_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART0_ERR_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART1_Status_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART1_ERR_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART2_Status_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART2_ERR_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART3_Status_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART3_ERR_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void ADC0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CMP0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CMP1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void FTM0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void FTM1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void FTM2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CMT_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void RTC_Alarm_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void RTC_Seconds_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PIT0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PIT1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PIT2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PIT3_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PDB_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void USB_OTG_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void USB_Charger_Detect_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void Tamper_Drylce_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DAC0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void MCG_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void LPTimer_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PORTA_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PORTB_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PORTC_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PORTD_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void PORTE_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void SWI_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void SPI2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART4_Status_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void UART4_ERR_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CMP2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void FTM3_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void DAC1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void ADC1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void I2C2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CAN0_Message_buffer_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CAN0_Bus_Off_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CAN0_Err_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CAN0_Tx_WarningIRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CAN0_Rx_Warning_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void CAN0_Wake_Up_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void SDHC_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void ENET_MAC_Timer_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void ENET_MAC_Transmit_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void ENET_MAC_Receive_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
void ENET_MAC_Error_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));

/* The Interrupt Vector Table */
void (* const InterruptVector[])() __attribute__ ((section(".vectortable"))) = {
    /* Processor exceptions */
    (void(*)(void)) &_estack,
    __thumb_startup,
    NMI_Handler,
    HardFault_Handler,
    Mem_Manage_Fault_Handler,
    Bus_Fault_Handler,
    Usage_Fault_Handler,
    0,
    0,
    0,
    0,
    SVC_Handler,
    DebugMonitor_Handler,
    0,
    PendSV_Handler,
    SysTick_Handler,

    /* Interrupts */
    DMA0_IRQHandler, /* DMA Channel 0 Transfer Complete */
    DMA1_IRQHandler, /* DMA Channel 1 Transfer Complete */
    DMA2_IRQHandler, /* DMA Channel 2 Transfer Complete */
    DMA3_IRQHandler, /* DMA Channel 3 Transfer Complete */
   DMA4_IRQHandler, /* DMA Channel 4 Transfer Complete */
    DMA5_IRQHandler, /* DMA Channel 5 Transfer Complete */
    DMA6_IRQHandler, /* DMA Channel 6 Transfer Complete */
    DMA7_IRQHandler, /* DMA Channel 7 Transfer Complete */
   DMA8_IRQHandler, /* DMA Channel 8 Transfer Complete */
    DMA9_IRQHandler, /* DMA Channel 9 Transfer Complete */
    DMA10_IRQHandler, /* DMA Channel 10 Transfer Complete */
    DMA11_IRQHandler, /* DMA Channel 11 Transfer Complete */
   DMA12_IRQHandler, /* DMA Channel 12 Transfer Complete */
    DMA13_IRQHandler, /* DMA Channel 13 Transfer Complete */
    DMA14_IRQHandler, /* DMA Channel 14 Transfer Complete */
    DMA15_IRQHandler, /* DMA Channel 15 Transfer Complete */
   DMA_Error_IRQHandler, /* DMA Error */
    MCM_IRQHandler, /* Normal Interrupt */
    FTFL_IRQHandler, /* FTFL Interrupt */
   Read_Collision_IRQHandler,
   LVD_LVW_IRQHandler, /* Low Voltage Detect, Low Voltage Warning */
   LLW_IRQHandler, /* Low Leakage Wake-up */
   Watchdog_IRQHandler,
   RNG_IRQHandler,
   I2C0_IRQHandler, /* I2C0 interrupt */
    I2C1_IRQHandler, /* I2C1 interrupt */
    SPI0_IRQHandler, /* SPI0 Interrupt */
    SPI1_IRQHandler, /* SPI1 Interrupt */
   I2S0_Tx_IRQHandler, /* Transmit I2S0 interrupt */
    I2S0_Rx_IRQHandler, /* Receive I2S0 interrupt */
    UART0_LON_IRQHandler, /* UART0 LON interrupt */
   UART0_Status_IRQHandler, /* UART0 Status interrupt */
   UART0_ERR_IRQHandler, /* UART0 Error interrupt */
   UART1_Status_IRQHandler, /* UART1 Status interrupt */
   UART1_ERR_IRQHandler, /* UART1 Error interrupt */
   UART2_Status_IRQHandler, /* UART2 Status interrupt */
   UART2_ERR_IRQHandler, /* UART2 Error interrupt */
   UART3_Status_IRQHandler, /* UART3 Status interrupt */
   UART3_ERR_IRQHandler, /* UART3 Error interrupt */
   ADC0_IRQHandler, /* ADC0 interrupt */
    CMP0_IRQHandler, /* CMP0 interrupt */
   CMP1_IRQHandler, /* CMP1 interrupt */
    FTM0_IRQHandler, /* FTM0 fault, overflow and channels interrupt */
    FTM1_IRQHandler, /* FTM1 fault, overflow and channels interrupt */
    FTM2_IRQHandler, /* FTM2 fault, overflow and channels interrupt */
   CMT_IRQHandler,
    RTC_Alarm_IRQHandler, /* RTC Alarm interrupt */
    RTC_Seconds_IRQHandler, /* RTC Seconds interrupt */
    PIT0_IRQHandler, /* PIT timer all channels interrupt */
   PIT1_IRQHandler, /* PIT timer all channels interrupt */
   PIT2_IRQHandler, /* PIT timer all channels interrupt */
   PIT3_IRQHandler, /* PIT timer all channels interrupt */
   PDB_IRQHandler,
   USB_OTG_IRQHandler,
   USB_Charger_Detect_IRQHandler,
   Tamper_Drylce_IRQHandler,
    DAC0_IRQHandler, /* DAC0 interrupt */
   MCG_IRQHandler, /* MCG Interrupt */
    LPTimer_IRQHandler, /* LPTimer interrupt */
   PORTA_IRQHandler, /* Port A interrupt */
   PORTB_IRQHandler, /* Port B interrupt */
   PORTC_IRQHandler, /* Port C interrupt */
    PORTD_IRQHandler, /* Port D interrupt */
   PORTE_IRQHandler, /* Port E interrupt */
   SWI_IRQHandler,
   SPI2_IRQHandler,
   UART4_Status_IRQHandler,
   UART4_ERR_IRQHandler,
   0,
   0,
   CMP2_IRQHandler,
   FTM3_IRQHandler,
   DAC1_IRQHandler,
   ADC1_IRQHandler,
   I2C2_IRQHandler,
   CAN0_Message_buffer_IRQHandler,
   CAN0_Bus_Off_IRQHandler,
   CAN0_Err_IRQHandler,
   CAN0_Tx_WarningIRQHandler,
   CAN0_Rx_Warning_IRQHandler,
   CAN0_Wake_Up_IRQHandler,
   SDHC_IRQHandler,
   ENET_MAC_Timer_IRQHandler,
   ENET_MAC_Transmit_IRQHandler,
   ENET_MAC_Receive_IRQHandler,
   ENET_MAC_Error_IRQHandler
};

Re: LPC2148 ASM program need on system call, number 0x55 need to be implemented in assembly language

science_exp9 — Fri, 18 Oct 2019 10:58:36 GMT

Thanks you very much for your reply.

i am looking for below answers;

1. What will be the address location (in hexadecimal) where the PC should jump to when system call is made?
2. What should be the instruction at that address (answer from A) location in order to properly handle the system call?
3. Write the assembly code for system call handler.

If you can provide me the answers, it will be great help to me.

Regards,

Jon

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