I have a simple microblaze setup with two Gpio (Push button and switches). I want to handle both devices interrupts.
Here follows my current non-working code.
#include<xparameters.h>
#include<xgpio.h>
#include<xintc.h>
#include<xil_exception.h>
static XGpio PushBt;
static XGpio sw;
static XIntc myIntc;
int delay, limit=3000000;
void pb_int_handler(void *baseaddr_p) {
Xuint32 dsr;
//DSR contains the INFORMATION of which button was depressed, so we can switch
//on its value.
dsr = XGpio_DiscreteRead(&PushBt, 1);
switch(dsr) {
case 0x01:
xil_printf("Up\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
break;
case 0x02:
xil_printf("Left\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
break;
case 0x08:
xil_printf("Right\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
break;
case 0x04:
xil_printf("Down\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
break;
default : {}
}
//Clear the interrupt both in the Gpio instance as well as the interrupt controller
XGpio_InterruptClear(&PushBt, 0x3);
XIntc_Acknowledge(&myIntc,XPAR_AXI_INTC_0_PUSH_IP2INTC_IRPT_INTR);
}
void sw_int_handler(void *baseaddr_p) {
Xuint32 dsr;
//DSR contains the INFORMATION of which button was depressed, so we can switch
//on its value.
dsr = XGpio_DiscreteRead(&sw, 1);
switch(dsr) {
case 0x00:
xil_printf("Switches 00 \r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
break;
case 0x01:
xil_printf("Switches 01 \r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
break;
case 0x02:
xil_printf("Switches 02 \r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
break;
case 0x03:
xil_printf("Switches 03 \r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
break;
default : {}
}
//Clear the interrupt both in the Gpio instance as well as the interrupt controller
XGpio_InterruptClear(&sw, 0x3);
XIntc_Acknowledge(&myIntc,XPAR_AXI_INTC_0_SW_IP2INTC_IRPT_INTR);
}
int main(void) {
xil_printf("Setting up peripherals...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
xil_printf("Setting up push buttons...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
XGpio_Initialize(&PushBt, XPAR_PUSH_DEVICE_ID);
XGpio_SetDataDirection(&PushBt,1,1); //set pb as input port
XGpio_InterruptEnable(&PushBt, XPAR_PUSH_IP2INTC_IRPT_MASK);
XGpio_InterruptGlobalEnable(&PushBt);
xil_printf("Setting up switches...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
XGpio_Initialize(&sw, XPAR_SW_DEVICE_ID);
XGpio_SetDataDirection(&sw,1,1); //set sw as input port
XGpio_InterruptEnable(&sw, XPAR_SW_IP2INTC_IRPT_MASK);
XGpio_InterruptGlobalEnable(&sw);
xil_printf("Setting up interrupt controller...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
XIntc_Initialize(&myIntc, XPAR_INTC_0_DEVICE_ID);
xil_printf("Register the interrupt...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
XIntc_Connect(&myIntc, XPAR_AXI_INTC_0_PUSH_IP2INTC_IRPT_INTR,
(XInterruptHandler)pb_int_handler,
&PushBt);
XIntc_Connect(&myIntc, XPAR_AXI_INTC_0_SW_IP2INTC_IRPT_INTR,
(XInterruptHandler)sw_int_handler,
&sw);
xil_printf("Enable individual interrupt...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
XIntc_EnableIntr(&myIntc,XPAR_PUSH_IP2INTC_IRPT_MASK | XPAR_SW_IP2INTC_IRPT_MASK);
xil_printf("Start the interrupt controller...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
XIntc_Start(&myIntc, XIN_REAL_MODE);
XIntc_MasterEnable(&myIntc);
microblaze_enable_interrupts();
xil_printf("Setting up exceptions...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
Xil_ExceptionInit();
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_M_AXI_I_EXCEPTION,
(XExceptionHandler)XIntc_InterruptHandler,
&myIntc);
Xil_ExceptionEnable();
while(1) {
xil_printf("Entering loop...\r\n");
for(delay=0;delay<limit;delay++){}; // delay cycle
}
}
Any help explaining the right interrupt code sequence?
- I set up the handlers.
- I initialized the Interrupt controller.
- I connected the handlers.
- I enabled interrupt masks.
- I started the Interrupt Controller.
- I enabled the Master Interrupt Controller.
So what did I forgot? Or what's wrong? Thanks
