XGpioPs_SetDirection(Gpio,0x7,0x01);
I am designed to write XGpioPs_SetDirectionPin(Gpio,0x07,0x01) but make a mistake !
The driver api will check the validity of parameters:
Xil_AssertVoid(InstancePtr != NULL);
Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
Xil_AssertVoid(Pin < XGPIOPS_DEVICE_MAX_PIN_NUM);
Xil_AssertVoid((Direction == 0) || (Direction == 1));
Go into sentence: Xil_AssertVoid(Pin < XGPIOPS_DEVICE_MAX_PIN_NUM);
if (Expression) { \
Xil_AssertStatus = XIL_ASSERT_NONE; \
} else { \
Xil_Assert(__FILE__, __LINE__); \
Xil_AssertStatus = XIL_ASSERT_OCCURRED; \
return; \
}
Once the parameters occur false and the following 2 sentences will be executed:
Xil_Assert(__FILE__, __LINE__);
Xil_AssertStatus = XIL_ASSERT_OCCURRED;
It just set the Xil_AssertStatus flag and transform the error location information to the specified routes.
void Xil_Assert(const char *File, int Line)
{
/* if the callback has been set then invoke it */
if (Xil_AssertCallbackRoutine != 0) {
(*Xil_AssertCallbackRoutine)(File, Line);
}
/* if specified, wait indefinitely such that the assert will show up
* in testing
*/
while (Xil_AssertWait) {
}
}
Once the routes equal 0, that's no route being set, just run endless loop.
So if you application seems go away but no error message has been output or the specified flow has not been executed, just to think about the
ASSERT loop.