Hello,
im trying to implement an interrupt with the interrupt controller. The problem is, that the interrupt service routine will not be entered althought the output (irq) of the interrupt controller switches to high.
The interrupt signal is only a button wich is connected directly to the interrupt controller (intr). If i use push button GPIOs the interrupt works. Is it a problem to connect signals directly to the interrupt controller? I cant see the difference between the GPIO and non GPIO implementation
mhs:
PORT fpga_0_RS232_Uart_RX_pin = fpga_0_RS232_Uart_RX_pin, DIR = I
PORT fpga_0_RS232_Uart_TX_pin = fpga_0_RS232_Uart_TX_pin, DIR = O
PORT fpga_0_clk_1_sys_clk_pin = CLK_S, DIR = I, SIGIS = CLK, CLK_FREQ = 100000000
PORT fpga_0_rst_1_sys_rst_pin = sys_rst_s, DIR = I, SIGIS = RST, RST_POLARITY = 0
PORT btn0 = btn0, DIR = I, SIGIS = INTERRUPT, SENSITIVITY = EDGE_RISING
PORT IRQ_OUT = ppc405_0_EICC405EXTINPUTIRQ_0, DIR = O
BEGIN ppc405_virtex4
PARAMETER INSTANCE = ppc405_0
PARAMETER C_FASTEST_PLB_CLOCK = DPLB0
PARAMETER C_IDCR_BASEADDR = 0b0100000000
PARAMETER C_IDCR_HIGHADDR = 0b0111111111
PARAMETER HW_VER = 2.01.b
BUS_INTERFACE DPLB0 = plb
BUS_INTERFACE IPLB0 = plb
BUS_INTERFACE JTAGPPC = ppc405_0_jtagppc_bus
BUS_INTERFACE RESETPPC = ppc_reset_bus
PORT CPMC405CLOCK = clk_100_0000MHzDCM0
PORT EICC405EXTINPUTIRQ = ppc405_0_EICC405EXTINPUTIRQ_0
END
BEGIN xps_intc
PARAMETER INSTANCE = xps_intc_0
PARAMETER HW_VER = 2.01.a
PARAMETER C_BASEADDR = 0x81800000
PARAMETER C_HIGHADDR = 0x8180ffff
BUS_INTERFACE SPLB = plb
PORT Irq = ppc405_0_EICC405EXTINPUTIRQ_0
PORT Intr = btn0
END
c file non gpio (doesnt work):
#include "xparameters.h"
#include "stdio.h"
#include "xbasic_types.h"
#include "xintc.h"
#include "xexception_l.h"
static
XIntcInterruptController;
void
btn0_ISR(){
print("btn0_ISR_used");
XIntc_Acknowledge(&InterruptController, XPAR_XPS_INTC_0_SYSTEM_BTN0_INTR);
}
int
main()
{
print(
"enter main");
XExc_Init();
XExc_RegisterHandler(XEXC_ID_NON_CRITICAL_INT, (
XExceptionHandler)XIntc_DeviceInterruptHandler, (void*)XPAR_XPS_INTC_0_DEVICE_ID);
XIntc_Initialize(&InterruptController, XPAR_XPS_INTC_0_DEVICE_ID);
XIntc_MasterEnable(XPAR_XPS_INTC_0_BASEADDR); // For setting MER
XIntc_Connect(&InterruptController, 0, (XInterruptHandler)btn0_ISR, (void*)0); // Connecting service routine
XIntc_Enable(&InterruptController, XPAR_XPS_INTC_0_SYSTEM_BTN0_INTR); //For setting IER
XExc_mEnableExceptions(XEXC_ID_NON_CRITICAL_INT);
while(1){};
return 0;
}
c file GPIO (work):
static volatile unsigned int button_count = 0;
static XIntc InterruptController;
static XGpioButtons, Lights;
void button_pressed(void) {
print("interrupted..");
XGpio_InterruptClear(&Buttons, XGPIO_IR_CH1_MASK);
}
int
main (void) {
print("-- Entering ButtonsAndLights main() v1.9 --\r\n");
XExc_Init();
XExc_RegisterHandler(XEXC_ID_NON_CRITICAL_INT, (XExceptionHandler)XIntc_DeviceInterruptHandler, (void*)XPAR_XPS_INTC_0_DEVICE_ID);
XIntc_Initialize(&InterruptController, XPAR_XPS_INTC_0_DEVICE_ID);
XIntc_MasterEnable(XPAR_XPS_INTC_0_BASEADDR);
XIntc_Connect(&InterruptController, XPAR_XPS_INTC_0_PUSH_BUTTONS_POSITION_IP2INTC_IRPT_INTR,(
XInterruptHandler) button_pressed, (void*) 0);
XIntc_Enable(&InterruptController, XPAR_XPS_INTC_0_PUSH_BUTTONS_POSITION_IP2INTC_IRPT_INTR);
XExc_mEnableExceptions(XEXC_NON_CRITICAL);
if(XGpio_Initialize(&Buttons, XPAR_PUSH_BUTTONS_POSITION_DEVICE_ID) != XST_SUCCESS) {
printf("Failed to initalize the buttons.\r\n");
}
else{
XGpio_SetDataDirection(&Buttons, 1, 0xFFFFFFFF);
XGpio_InterruptClear(&Buttons, XGPIO_IR_CH1_MASK);
XGpio_InterruptEnable(&Buttons, XGPIO_IR_CH1_MASK);
XGpio_InterruptGlobalEnable(&Buttons);
}
if(XGpio_Initialize(&Lights, XPAR_LEDS_4BIT_DEVICE_ID) != XST_SUCCESS) {
printf("Failed to initalize the LEDs.\r\n");
}
else{
XGpio_SetDataDirection(&Lights, 1, 0x00000000);
/* Switch all leds off */
XGpio_DiscreteWrite(&Lights, 1, 0x0F);
}
while(1) {}
return0;
}
