Hello,

I am trying to do test with de0_nano by following the guideline from "https://github.com/openrisc/tutorials/tree/master/de0_nano" and . after program the sof file into de0_nano and upload the timer.elf to FPGA via alter usb blaster. when i do the below command, there is no led blinking then i dump the 0x91000000 (mdb 0x91000000 0x10) is kept same value that means the code isn't running but i can use mwb 0x91000000 0x?? to control the led status. is something wrong in de0_nano setting ? How can i do ?

target remote :50001
load
set $npc=0x100
continue

after that , i use gdb to trace the code, it always show "Single stepping until exit from function or1k reset, which has no line number information." but it has -g already in Makefile.

the or1k-elf-gcc is from tutorials/toolchains/or1k-elf/bin/ and version is 5.2.0
or1k-elf-gdb version is 7.11

I also try this "http://web.archive.org/web/20150208222518/http://elec4fun.fr/downloads/led_blink.S" by using telnet to upload the binary to target then run it without any problem.

step 1:
or1k-elf-as -o led_blink.elf led_blink.S

step 2:
or1k-elf-objcopy -O binary led_blink.elf led_blink.bin

step 3:
telnet 127.0.0.1 4444
load_image led_blink.bin 0
reg npc 0x100
resume

then the led is blinking.

could someone help me how to figure out the problem on or1k-elf-gcc and gdb ? is something wrong on newlib ?

sorry, it just work today. No idea how it was failed.