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homeinit's avatar
homeinit
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2 years ago

Adding a PIO for leds to my qsys and could not download and execute the program

Hello, I am building a qsys SOC, I am using an extern SDRAM connected to my NIOS; the project works and I could print anything and debug the project, When I added a PIO connected to the SOC the...
homeinit's avatar
homeinit
Icon for New Contributor rankNew Contributor
2 years ago

I managed to execute the program on the SDRAM memory by connecting the pll_slave to the data master but when I execute the code it seems the result is not what the C code does.

I could not understand why instead of alt_putstr("Hello from Nios II!\n"); it printed, "Hehho brom Jios II!"

It looks like the rest of the program is okay but I am not sure why this happening! I changed the size of the JTAG buffer size before but I don't know if I have to change anything else if I pass from 64 bytes to 128 bytes. It could be related to this modification I did and still has a side effect.

I'm a bit suspicious about running the code in the SDRAM, I'm not sure about the timing parameters I set in the SDRAM IP controller ...

Here is a picture: