nrf_drv_uart_tx silently fails on UARTE1 with SDK15

[Gordon]

Hi,

I've got some code (at https://github.com/espruino/Espruino/blob/master/targets/nrf5x/jshardware.c#L1201-L1318) where I use nrf_drv_uart to access the UART. I don't use nrf_serial because my application has its own IO buffering that I want to use.

This has worked great on multiple SDKs and multiple devices, however I just came to port it to UARTE1.

This was a bit more painful than expected because I had to fiddle with a bunch of sdk_config stuff to get it compiling without errors (related to it expecting NRF_UART1), but now it compiles and runs.

Receive works perfectly, and the very first transmit works too (and even fires the callback to say that it has finished). However subsequent transmits fail to do anything. nrf_drv_uart_tx is called and it returns with no error codes, but it just doesn't cause anything to be sent on UART1.

Any ideas what the issue could be?

thanks!

[Jared]

Hi,

I can't see that you actually check if the function uart_starttx() returns an error? 

regards

Jared 

[Gordon]

`uart_starttx` doesn't return anything, but it does call `nrf_drv_uart_tx`. In the code that's posted I don't check the error, but before posting I did modify my version slightly to check it, and as I mentioned in my post there were never any error codes returned.

Or did you mean something else?