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kyeh's avatar
kyeh
Icon for New Contributor rankNew Contributor
2 years ago

Nios V juart-terminal Continuously Returns EOF with getchar();

Hello all, I am fairly new to working with FPGAs so please be gentle. We are utilizing the Cyclone 10 GX Development Kit and programmed the Nios V IP to act as our microprocessor. The µC/OS-II is b...
Nios Cpu
aikeu's avatar
aikeu
Icon for Regular Contributor rankRegular Contributor
2 years ago

Hi kyeh,


Any further up from the previous comment?


Thanks.

Regards,

Aik Eu


kyeh's avatar
kyeh
Icon for New Contributor rankNew Contributor
2 years ago

Hello aikeu,

Thanks for checking back. I am currently investigating possible instability within the UART read_data lines. My concern currently seems to be the Avalon av_readdata bus. It fluctuates between "@5" (0x0040_3501) and "@" (0x0040_A401) in the background. Here I set signaltap to trigger when I enter "A". I do confirm on the RiscFree debugger that the device still returns EOF. I am currently unsure how this would return EOF but will look further into it.

Thanks,

kyeh