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Vincent_F's avatar
Vincent_F
Icon for New Contributor rankNew Contributor
1 year ago

UART gets stuck when enabling IRQ (NIOS II)

Hi, I'm reopening an old post from 2013 that apparently never got a reply. I'm facing the same problem. I have a small NIOS II system (used as a demo for my students) that features a jTAG UART an...
Nios Cpu
tehjingy_Altera's avatar
tehjingy_Altera
Icon for Regular Contributor rankRegular Contributor
1 year ago

HI


From the code I see that you are are enabling the interrupt for transmit ready.

Could you try to enable disable that and enable the Read ready mask instead.

ALTERA_AVALON_UART_CONTROL_TRDY_MSK <--- Transmit Ready Mask

ALTERA_AVALON_UART_CONTROL_RRDY_MSK < ---- Read Ready Mask


Regards

Jingyang, Teh


Vincent_F's avatar
Vincent_F
Icon for New Contributor rankNew Contributor
1 year ago

Hi,

Thanks for your suggestion. Unfortunately, I've already tried it and it won't work either. Whatever the interrupt (transmit or read) the symptoms are the same.

Best regards

Vincent