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TriCore TC27D STM(System Timer)


HW: ShieldBuddy TC275

There are as many STM modules as there are CPUs in the system. Thus each CPU can use one STM for its time base

  • IfxStm_cfg.h: STM on-chip implementation data.
  • IfxStm.h: STM basic functionality.
  • IfxStm_Timer.h: STM TIMER details.

Examples​

info

폴더를 새로 생성한 경우 clean projet 후, 다시 빌드해야 합니다.

0_Src/AppSw/Tricore/TC27D_lib/Config/Ifx_IntPrioDef.h를 만들고 아래와 같이 작성합니다.

#pragma once

#define IFX_INTPRIO_STM0_SR0 10

주기적인 함수 호출​

#include "IfxCpu.h"
#include "IfxPort_Io.h"
#include "IfxPort_PinMap.h"
#include "IfxScuWdt.h"
#include "IfxStm.h"
#include "Ifx_IntPrioDef.h"
#include "Ifx_Types.h"

IfxCpu_syncEvent cpuSyncEvent = 0;

Ifx_STM *            stmSfr;
IfxStm_CompareConfig stmConfig;

// P10.2 핀을 OUTPUT으로 설정.
const IfxPort_Io_ConfigPin configPin[] = {
    {&IfxPort_P10_2,
     IfxPort_Mode_outputPushPullGeneral,
     IfxPort_PadDriver_cmosAutomotiveSpeed1},
};

const IfxPort_Io_Config conf
    = {sizeof(configPin) / sizeof(IfxPort_Io_ConfigPin),
       (IfxPort_Io_ConfigPin *)configPin};

IFX_INTERRUPT(stm0Sr0ISR, 0, IFX_INTPRIO_STM0_SR0) {
    IfxStm_clearCompareFlag(stmSfr, stmConfig.comparator);
    IfxStm_increaseCompare(stmSfr, stmConfig.comparator, stmConfig.ticks);

    // 함수 호출
    IfxPort_setPinState(&MODULE_P10, 2, IfxPort_State_toggled);
}

void STM0_init(void) {
    stmSfr = &MODULE_STM0;
    IfxStm_initCompareConfig(&stmConfig);
    // configure to generate interrupt every 100 us
    sint32 ticks              = IfxStm_getTicksFromMicroseconds(stmSfr, 100);
    stmConfig.ticks           = ticks;
    stmConfig.triggerPriority = IFX_INTPRIO_STM0_SR0;
    stmConfig.typeOfService   = IfxSrc_Tos_cpu0;
    IfxStm_initCompare(stmSfr, &stmConfig);
}

int core0_main(void) {
    IfxCpu_enableInterrupts();
    /*
     * !!WATCHDOG0 AND SAFETY WATCHDOG ARE DISABLED HERE!!
     * Enable the watchdog in the demo if it is required and also service the
     * watchdog periodically
     * */
    IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());
    IfxScuWdt_disableSafetyWatchdog(IfxScuWdt_getSafetyWatchdogPassword());

    /* Cpu sync event wait*/
    IfxCpu_emitEvent(&cpuSyncEvent);
    IfxCpu_waitEvent(&cpuSyncEvent, 1);

    // 핀 설정 적용.
    IfxPort_Io_initModule(&conf);

    STM0_init();

    while(1) {

    }

    return 1;
}