void TimerCounterHandler(void* CallBackRef, u8 TmrCtrNumber)
{
XTmrCtr* InstancePtr = (XTmrCtr*)CallBackRef;
if (XTmrCtr_IsExpired(InstancePtr, TmrCtrNumber)) {
xil_printf("count = %d\r\n", count++);
}
}
/*定时器中断服务程序*/
void timer_int_handler(void * CallBackRef, u8 TmrCtrNumber){
//设置回调函数
XTmrCtr * InstancePtr = (XTmrCtr *)CallBackRef;
//检查定时器的值是否过期
if(XTmrCtr_IsExpired(InstancePtr, TmrCtrNumber)){
count++;
one_second_flag = 1;
//通过UART在终端上打印技术值
xil_printf("Count value is: %x\n\r", count);
}
}
void usleep(unsigned int duration){
XTmrCtr *TmrCtrInstancePtr = &TimerCounter;
XTmrCtr_SetResetValue(TmrCtrInstancePtr,0,duration*(TIMER_FREQ/1000000));
XTmrCtr_Start(TmrCtrInstancePtr,0);
volatile u8 isExpired = 0;
while(isExpired!=1){
isExpired = XTmrCtr_IsExpired(TmrCtrInstancePtr,0);
}
XTmrCtr_Reset(TmrCtrInstancePtr,0);
return;
}
/*
* Timer Interrupt Handler
*/
void tmrIntrHandler(void *InstancePtr) {
if (XTmrCtr_IsExpired(&tmrCtr, 0)) {
//Stop Timer Controller
XTmrCtr_Stop(&tmrCtr, 0);
//Set flag
tmrExpired = BOOL_TRUE;
//Reset Timer Controller
XTmrCtr_Reset(&tmrCtr, 0);
//Start Timer
XTmrCtr_Start(&tmrCtr, 0);
}
}
/**
* This function is the handler which performs processing for the timer counter.
* It is called from an interrupt context such that the amount of processing
* performed should be minimized. It is called when the timer counter expires
* if interrupts are enabled.
*
* This handler provides an example of how to handle timer counter interrupts
* but is application specific.
*
* @param CallBackRef is a pointer to the callback function
* @param TmrCtrNumber is the number of the timer to which this
* handler is associated with.
*
* @return None.
*
* @note None.
*
******************************************************************************/
void TimerCounterHandler(void *CallBackRef, u8 TmrCtrNumber)
{
XTmrCtr *InstancePtr = (XTmrCtr *)CallBackRef;
/*
* Check if the timer counter has expired, checking is not necessary
* since that's the reason this function is executed, this just shows
* how the callback reference can be used as a pointer to the instance
* of the timer counter that expired, increment a shared variable so
* the main thread of execution can see the timer expired
*/
if (XTmrCtr_IsExpired(InstancePtr, TmrCtrNumber)) {
TimerExpired++;
if(TimerExpired == 3) {
XTmrCtr_SetOptions(InstancePtr, TmrCtrNumber, 0);
}
}
}
int main (void) {
int old_count = 0;
gpio_init();
XGpio_DiscreteWrite(&led,1,0);
XGpio_DiscreteWrite(&ledPush,1,0x1);
xil_printf("-- Entering main() --\r\n");
XTmrCtr_Initialize(&XTC, XPAR_OPB_TIMER_1_DEVICE_ID );
XTmrCtr_SetOptions(&XTC, 0, XTC_DOWN_COUNT_OPTION | XTC_INT_MODE_OPTION |
XTC_AUTO_RELOAD_OPTION );
XTmrCtr_SetHandler(&XTC, TimerCounterHandler, &XTC);
microblaze_register_handler( (XInterruptHandler)XTmrCtr_InterruptHandler,
&XTC );
microblaze_enable_interrupts();
XTmrCtr_SetResetValue ( &XTC, 0, 50*1000000L );
XTmrCtr_Start( &XTC, 0 );
XGpio_DiscreteWrite(&ledPush,1,0x3);
while(1) {
if (gpio_check()) break;
if ( old_count != intr_count ) {
xil_printf(" TmrCtr update %d\r\n", intr_count );
XGpio_DiscreteWrite(&led,1,3);
XGpio_DiscreteWrite(&ledPush,1,0x10 | (intr_count&0xF));
old_count = intr_count;
}
}
if ( XTmrCtr_IsExpired( &XTC, 0 ) ) {
xil_printf(" TmrCtr Timed out\r\n" );
} else {
xil_printf(" TmrCtr un-Timeout\r\n" );
}
XTmrCtr_Stop(&XTC, 0 );
microblaze_disable_interrupts();
XGpio_DiscreteWrite(&ledPush,1,0x10);
xil_printf("-- Exiting main() --\r\n");
return 0;
}
