Interrupt Problem over HLGPI

[Altera_Forum]

Hello, 

 I'm very new in developing with Cyclone V SoC and have big problems to recognize an interrupt send from a Button to the HPS.   What I have done so far:  1. Initiate the HPS System with Qsys (enable HLGPI interface)  2. compiled the project with quartus and load the fpga and boot YOCTO Linux  3. I have pushed the button and read out the interrupt with "./devmem2 0x70a000" ( I have checked all 16 bits) but i only got the result 0x00000000   What am I doing wrong? This is very frustrating.  I appreciate any help

[Altera_Forum]

Hello, 

 Try reading "./devmem2 0x70a050". That worked for me, but I still can't figure out why reading "./devmem2 0x70a000" (previusly I had set the bits to INPUT) only gives me 0x0.   "./devmem2 0x70a050" is the GPIO2_EXP_PORTA  Regards!

[Altera_Forum]

Thank You! 

This has helped me a lot.  Best Regards

[Altera_Forum]

I want to find out, which gpio pin is used for 0xff70a50 under /sys/class/gpio. 

 The Documentation "Cortex-A9 Microprozessor Unit Subsystem" says Pin 198 (Table 6-2). But I don't think so.  Does anyone know the answer?