Uart baud rate 512

[Fritz Kendeffy-Hermann]

Is it possibe to configure uart with baud rate of 512 on nrf52832?

I tried to configure the uart with this baud rate, but I am not able to get the uart communication working

[awneil]

Have you checked in the Product Specification ?

512 is not a "normal" baud rate - why do you need that, specifically?

Have you verified that your setup works with a "normal" baud rate?

Fritz Kendeffy-Hermann said:

I tried to configure the uart with this baud rate, but I am not able to get the uart communication working

So what, exactly, did you do?

And what, exactly, was the result?

Do you see any activity at all on transmit?

[Fritz Kendeffy-Hermann]

I am not able to change the FW of the device where the nrf52832 is connected to. So I need go get it work with baud rate 512.

The uart communication (same code) was working before with normal baud rate in another project.

When I connect TX of the connected mcu via serial adapter to my PC, I am able to monitor what it is sending.

On 52832 side I am not able to receive a single byte. There happens nothing

[Einar Thorsrud]

Hi,

512 is not a supported baud rate. You can always try to play with the BAUDRATE register but using anything other than the listed baud rates may or may not work. You can refer to this ancient post to see an explanation on the BAUDRATE register (it is the same for the UARTE peripheral on the nRF52 series).

[awneil]

At such a low baud rate, a software (bit-banged) UART may be practical ... ?

[awneil]

Fritz Kendeffy-Hermann said:

On 52832 side I am not able to receive a single byte. There happens nothing

So what testing / debugging / investigation have you done to find out why?

Again, do you see any activity at all when you transmit from the nRF? If so, is the baud rate correct?

If your external MCU is using such a weird baud rate, is it also doing other weird things - like inverting the data, or using a weird frame format ...?