7、RISC-V中断与异常详解

RISC-V中断与异常详解

1. 调度器启动代码

以下代码展示了如何启动调度器：

unsigned int stackRegion [ NTASKS * TASK_STACK_SIZE ];
TCB_Type TCB[ NTASKS ];
void (* TaskFunctions [ NTASKS ]) ();
int current_task = -1;

void Task0 (){
    while (1) {}
}
void Task1 (){
    while (1) {}
}
void Task2 (){
    while (1) {}
}
void Task3 (){
    while (1) {}
}

int main ( void )
{
    TaskFunctions [0] = Task0 ;
    TaskFunctions [1] = Task1 ;
    TaskFunctions [2] = Task2 ;
    TaskFunctions [3] = Task3 ;
    // Init scheduler :
    InitSchedulerSVC ( stackRegion , TCB , TaskFunctions );
    // Start SysTick timer :
    HAL_InitTick (0);
    // Switch to NOT PRIVILEDGED with PSP:
    __set_CONTROL (0 x00000003 );
    // Start the scheduler :
    __asm volatile (" svc 0"