maxikrie commented on issue #11877:
URL: https://github.com/apache/nuttx/issues/11877#issuecomment-1988330586
@acassis Thanks a lot!
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maxikrie closed issue #11877: STM32H7 (& STM32F4): UART write issue
URL: https://github.com/apache/nuttx/issues/11877
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acassis commented on issue #11877:
URL: https://github.com/apache/nuttx/issues/11877#issuecomment-1988306785
@maxikrie I think these differences between ESP32 and STM32 could happen
because the former has internal HW FIFO and the later doesn't.
More info about O_NONBLOCK please read
maxikrie commented on issue #11877:
URL: https://github.com/apache/nuttx/issues/11877#issuecomment-1987368423
@acassis Thanks for the hint! It lead me to the solution.
The issue in my example was the `O_NONBLOCK` flag. I guess immediate
`close(fd);` causes the bytes not to be
acassis commented on issue #11877:
URL: https://github.com/apache/nuttx/issues/11877#issuecomment-1986987674
@maxikrie I used zmodem running on STM32F4Discovery and it worked, so the
TX/RX is working. BTW, are you using DMA? Could be related to same issue they
are discussing in the mailing
