int main()
{
init_platform();
XIOModule_Initialize(&gpo, XPAR_IOMODULE_0_DEVICE_ID); // Initialize the GPO module
microblaze_register_handler(XIOModule_DeviceInterruptHandler,
XPAR_IOMODULE_0_DEVICE_ID); // register the interrupt handler
XIOModule_Start(&gpo); // start the GPO module
XIOModule_Connect(&gpo, XIN_IOMODULE_FIT_1_INTERRUPT_INTR, timerTick,
NULL); // register timerTick() as our interrupt handler
XIOModule_Enable(&gpo, XIN_IOMODULE_FIT_1_INTERRUPT_INTR); // enable the interrupt
microblaze_enable_interrupts(); // enable global interrupts
u8 leds = 0;
while (1){
// write the LED value to port 1 (you can have up to 4 ports)
XIOModule_DiscreteWrite(&gpo, 1, leds++);
xil_printf("%d", leds);
xil_printf(",");
delay(500); // delay one half second
}
return 0;
}
/**
*
* This function connects the interrupt handler of the IO Module to the
* processor. This function is separate to allow it to be customized for each
* application. Each processor or RTOS may require unique processing to connect
* the interrupt handler.
*
* @param None.
*
* @return None.
*
* @note None.
*
****************************************************************************/
XStatus SetUpInterruptSystem(XIOModule *XIOModuleInstancePtr)
{
XStatus Status;
/*
* Connect a device driver handler that will be called when an interrupt
* for the device occurs, the device driver handler performs the specific
* interrupt processing for the device
*/
Status = XIOModule_Connect(XIOModuleInstancePtr, IOMODULE_DEVICE_ID,
(XInterruptHandler) DeviceDriverHandler,
(void *)0);
if (Status != XST_SUCCESS)
{
return XST_FAILURE;
}
/*
* Start the IO Module such that interrupts are enabled for all devices
* that cause interrupts.
*/
Status = XIOModule_Start(XIOModuleInstancePtr);
if (Status != XST_SUCCESS)
{
return XST_FAILURE;
}
/*
* Enable interrupts for the device and then cause interrupts so the
* handlers will be called.
*/
XIOModule_Enable(XIOModuleInstancePtr, IOMODULE_DEVICE_ID);
/*
* Initialize the exception table.
*/
Xil_ExceptionInit();
/*
* Register the IO module interrupt handler with the exception table.
*/
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler)XIOModule_DeviceInterruptHandler,
(void*) 0);
/*
* Enable exceptions.
*/
Xil_ExceptionEnable();
return XST_SUCCESS;
}
