Hello,
I have a custom core atatched to the microblaze PLB, which simply creates an interrupt with a given period. Its code is as generated by the periopheral wizard in EDK:
INTR_PROC : process( Bus2IP_Clk ) is
constant COUNT_SIZE : integer := 30;
constant ALL_ONES : std_logic_vector(0 to COUNT_SIZE-1) := (others => '1');
variable counter : std_logic_vector(0 to COUNT_SIZE-1);
begin
if ( Bus2IP_Clk'event and Bus2IP_Clk = '1' ) then
if ( Bus2IP_Reset = '1' ) then
counter := (others => '0');
intr_counter <= (others => '0');
else
counter := counter + 1;
if ( counter = ALL_ONES ) then
intr_counter <= (others => '1');
else
intr_counter <= (others => '0');
end if;
end if;
end if;
end process INTR_PROC;
IP2Bus_IntrEvent <= intr_counter;
This is a very simple core which I named cf_interface_2. I have checked all connections to the interrupt controller and they are OK:
BEGIN cf_interface_v2
PARAMETER INSTANCE = cf_interface_v2_0
PARAMETER HW_VER = 1.00.a
PARAMETER C_BASEADDR = 0xc6000000
PARAMETER C_HIGHADDR = 0xc600ffff
BUS_INTERFACE SPLB = mb_plb
PORT IP2INTC_Irpt = cf_interface_v2_0_IP2INTC_Irpt
END
BEGIN xps_intc
PARAMETER INSTANCE = xps_intc_0
PARAMETER HW_VER = 1.00.a
PARAMETER C_BASEADDR = 0x81800000
PARAMETER C_HIGHADDR = 0x8180ffff
BUS_INTERFACE SPLB = mb_plb
PORT Irq = Interrupt
PORT Intr = cf_interface_v2_0_IP2INTC_Irpt
END
I have written a simple C code to register the handler, start interrupt service, etc:
main()
{
xil_printf("\033[H\033[J"); //clears the screen
xil_printf("Hello!\n\r");
int loop_count, mem_data_read, mem_write_data[16], mem_test_size;
// The following function call initialize the GPIO ports. LEDS_4BIT is configured
// to be an output port
XGpio_mSetDataDirection(XPAR_LEDS_4BIT_BASEADDR, 1, 0x00000000);
XGpio_mSetDataReg(XPAR_LEDS_4BIT_BASEADDR, 1, display_on);
//XGpio_mSetDataReg(XPAR_LEDS_4BIT_BASEADDR, 1, display_on);
xil_printf("Waiting for interrupts...\n\r");
xil_printf("\n\r");
// Register the interrupt
XIntc_RegisterHandler(XPAR_INTC_0_BASEADDR, XPAR_XPS_INTC_0_CF_INTERFACE_V2_0_IP2INTC_IRPT_INTR, (XInterruptHandler)myhandler, XPAR_INTC_0_BASEADDR);
// Start the interrupt controller
XIntc_mMasterEnable(XPAR_INTC_0_BASEADDR);
// Enable fe interrupts in the interrupt controller
XIntc_mEnableIntr(XPAR_INTC_0_BASEADDR, XPAR_CF_INTERFACE_V2_0_IP2INTC_IRPT_MASK);
// Enable microblaze interrupts
microblaze_enable_interrupts();
while(1);
}
void myhandler(void *baseAddr_p)
{
unsigned int csr;
int loop_count, dip_gpio_data, temp_data;
XGpio_mSetDataReg(XPAR_LEDS_4BIT_BASEADDR, 1, 0x00);
xil_printf("Caught interrupt from FE Controller!\n\r");
// Clear the timer interrupt */
//XTmrCtr_mSetControlStatusReg(XPAR_FE_IN_CONTROLLER_0_BASEADDR, 0, csr);
XIntc_Acknowledge(XPAR_INTC_0_BASEADDR,XPAR_XPS_INTC_0_CF_INTERFACE_0_IP2INTC_IRPT_INTR);
}
And the application stops at the second prinntf, and the interrupt handler never runs. Can someone please tell me what's wrong? I've checked everything and i'm running out of ideas..
Best,
JM
Message Edited by jmonteiro-dme on 05-28-2009 09:11 AM
