MMIO keybord interrtupt not triggering.

[Harish765]

I have Assembeled the below code. then connected the MMIO keyboard and display simulator using "Connect to Program".

The value is updated properly in 0xffff0004 on button press but the interrupt is not triggered.

.text 

main:
	la t0, isrHandle
	li t1, 8
	li t3, 1

	la	t0, isrHandle
	li t1, 0x100

	csrrs	zero, 5, t0
	csrrs	zero, 4, t1
	csrrsi zero, 0, 0x1
	
	
loop_main:
	li t1, 10
	addi t1, t1, 1
	j loop_main
	
	
	
isrHandle:
	nop
	nop
	uret

When I ran a different program for timer interrupt that is working. what is the issue with the MMIO interrupt ?

[Harish765]

[Harish765]

[Harish765]

attached the screen shot of the CSRs and MMIO address in the comments.

Please help with this issue have tried all the configuration and this issues seems to persist.

[Harish765]

          if (updatedReceiverControl != 1) {

               System.out.println("EXTERNAL_INTERRUPT_KEYBOARD");
               InterruptController.registerExternalInterrupt(EXTERNAL_INTERRUPT_KEYBOARD);
           }

https://github.com/TheThirdOne/rars/blob/master/src/rars/tools/KeyboardAndDisplaySimulator.java#L774

The problem is this check fails and interrupt is not send ever.

when i created the rar with this check commented

          /*if (updatedReceiverControl != 1) */{

               System.out.println("EXTERNAL_INTERRUPT_KEYBOARD");
               InterruptController.registerExternalInterrupt(EXTERNAL_INTERRUPT_KEYBOARD);
           } 

The interrupt is properly triggered.

Why is this check here ?
my understanding is this updatedReceiverControl is set to one when key is pressed so this check will always fail right ?

[Harish765]

@TheThirdOne The issue is blocking my project for more than a week. Please provide any help