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No, I don't forget to set I_EN. I don't enable the IRQ because I'll not use a ISR routine in my project to transmit the data from DMA to UART.
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Oh, sorry I forgot!:-)
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Which version of Quartus and Nios EDS do you use?
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I use Quartus 10.0 and NIOS EDS 10.0. Both with SP1.
It's really strange that you get almost correct transfer though you are using (in my opinion) the wrong address of the TXDATA register of the UART.
Hmmm? No Idea yet. Sorry...
Maybe you should use SignalTap for debugging. It helped us a lot! Really amazing tool.
Regards
Honored Contributor
