CMSIS中的delay与osDelay的区别

代码片段

CMSIS-RTOS，版本V1

• 延时函数，也可以当成HAL_delay函数

void delay (unsigned int count)
{
unsigned int index;

	for(index =0;index<count;index++)
	{
		;
	}
}

• 任务一

void led_thread1 (void const *argument) 
{
	static uint32_t num = 0;
	for (;;) 
	{
		num++ ;
		LED_On(1);                          
		//delay(500);
		LED_Off(1);
		//delay(500);
		osDelay(50);
	}
}

• 任务二

void led_thread2 (void const *argument) 
{
	for (;;) 
	{
		LED_On(2);                          
		delay(25);
//		osDelay(25);
		LED_Off(2);
		//delay(500);
		osDelay(50);
	}
}

• 定义线程

osThreadId main_ID,led_ID1,led_ID2;	
osThreadDef(led_thread2, osPriorityNormal, 1, 0);
//osThreadDef(led_thread1, osPriorityNormal, 1, 0);
osThreadDef(led_thread1, osPriorityLow, 1, 0);

• 创建线程

int main (void) 
{
	osKernelInitialize ();                    // initialize CMSIS-RTOS
	
	LED_Initialize ();
	led_ID2 = osThreadCreate(osThread(led_thread2), NULL);
	led_ID1 = osThreadCreate(osThread(led_thread1), NULL);

	osKernelStart ();                         // start thread execution 
	while(1)
	{
		osDelay(50);
	}
}

官方文档

结果显示

在stop/start debug session模式下，在工具栏中的Debug->OS Support->Event Viewer或者是System and Thread Viewer

• 延时的效果