AMP: Multicore blink led

Core 0

Blink one single led using the three cores, core0 toggle flag variable each second, core1 set the led to low when flag == FALSE and core2 set the led high when flag == TRUE

#include "Ifx_Types.h"
#include "IfxCpu.h"
#include "IfxScuWdt.h"
#include "IfxPort_Io.h"
#include "bsp.h"

IFX_ALIGN(4) IfxCpu_syncEvent g_cpuSyncEvent = 0;
/*global value shared by the three cores, but only core 0
has awrite operation on this variable*/
uint8 flag;

void core0_main( void )
{
    IfxCpu_enableInterrupts();
    
    /* !!WATCHDOG0 AND SAFETY WATCHDOG ARE DISABLED HERE!!
     * Enable the watchdogs and service them periodically if it is required */
    IfxScuWdt_disableCpuWatchdog( IfxScuWdt_getCpuWatchdogPassword() );
    IfxScuWdt_disableSafetyWatchdog( IfxScuWdt_getSafetyWatchdogPassword() );
    
    /*since the port 00.5 is share resource ti must be configured before cpu suyncrhonization */
    IfxPort_setPinMode( &MODULE_P00, 5, IfxPort_Mode_outputPushPullGeneral );
    IfxPort_setPinPadDriver( &MODULE_P00, 5, IfxPort_PadDriver_cmosAutomotiveSpeed1 );

    /* Wait for CPU sync event */
    IfxCpu_emitEvent( &g_cpuSyncEvent );
    IfxCpu_waitEvent( &g_cpuSyncEvent, 1u );

    while(1)
    {
        /*toggle flag value every second*/
        flag = !flag;
        wait( IfxStm_getTicksFromMilliseconds(&MODULE_STM0, 1000 ) );
    }
}

Core 1

Only core 0 write the variable every second, but core 1 write into the register to clear the pin

#include "Ifx_Types.h"
#include "IfxCpu.h"
#include "IfxScuWdt.h"
#include "IfxPort_Io.h"

extern IfxCpu_syncEvent g_cpuSyncEvent;
extern uint8 flag;

void core1_main(void)
{
    IfxCpu_enableInterrupts();
    
    /* !!WATCHDOG1 IS DISABLED HERE!!
     * Enable the watchdog and service it periodically if it is required
     */
    IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());
    
    /* Wait for CPU sync event */
    IfxCpu_emitEvent(&g_cpuSyncEvent);
    IfxCpu_waitEvent(&g_cpuSyncEvent, 1);

    while(1)
    {
        /*when global variable is reset*/
        if( flag == FALSE )
        {
            IfxPort_setPinLow( &MODULE_P00, 5 );
        }
    }
}

Core 2

While core 2 write into the register again to set the pin, there is no risk of a race condition because the difference of one second between both writing operation in both cores,

#include "Ifx_Types.h"
#include "IfxCpu.h"
#include "IfxScuWdt.h"
#include "IfxPort_Io.h"

extern IfxCpu_syncEvent g_cpuSyncEvent;
extern uint8 flag;

void core2_main(void)
{
    IfxCpu_enableInterrupts();
    
    /* !!WATCHDOG2 IS DISABLED HERE!!
     * Enable the watchdog and service it periodically if it is required
     */
    IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());
    
    /* Wait for CPU sync event */
    IfxCpu_emitEvent(&g_cpuSyncEvent);
    IfxCpu_waitEvent(&g_cpuSyncEvent, 1);

    while(1)
    {
        /*when global variable is set*/
        if( flag == TRUE )
        {
            IfxPort_setPinHigh( &MODULE_P00, 5 );
        }
    }
}