Interrupt from FPGA received only one time !

Hi,

Thank you very much for the answer.

I observe a similar behavior (handle is not called in interrupt) in 2 different baremetal OS: uc/os (page: https://www.micrium.com/download/de10-nano_webserver/) and code-time .

In both of this OS, I just added a call to the interrupt (72, 73) of irq0 and irq1 (which should be operated from KEY0 and KEY1 on DE-10 nano board) according to qsys of GHRD:

(https://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&No=1046&PartNo=4)

These are the steps I am doing:

1. I use DE-10 nano, with an example for bare-metal which work AS-IS without any modifications. The example is for uc/os , and can be downloaded from this
2. Load fpga GHRD for DE-10 nano
3. I added interrupt call for KEY0 as following:

BSP_IntVectSet(INT_ID_FPGA_IRQ1,	0,     CPU_ID_IF_0,                 BSP_OS_FpgaIntHandler);
 
   BSP_IntSetType();
 
    BSP_IntEnable(INT_ID_FPGA_IRQ1);
 
 
void  BSP_IntSetType (void)
 {
	    ARM_GIC_DIST_REG->ICDICFRn[4] = 0xffffffff;
 }

4.reset board - click key0 , first interrupt is being caught with a breakpoint, but on continue and clicking key0 again - nothing happens.

Is there any baremetal example showing how to catch interrupt from FPGA to HPS ?

Best Regards,

ranran