Using multiple UARTs on nRF52832

[schef]

Hi guys. What do you suggest when i have to use multiple uart devices?

[awneil]

As noted, the nRF52832 itself only has a single UART. If your "UART devices" are suitable, you could multiplex this single UART among them - either using the internal pin crossbar, or some external arrangement (or a bit of both).

If that's not suitable, then you will need to add additional UARTs - in software, or as external hardware (or both). In this case, there is nothing particularly special to the nRF - it's just the same as adding extra UARTs to any microcontroller.

A further option, if multiple UARTs is really critical to your project, would be to choose a different chip which does have enough UARTs in the first place!

[neosarchizo]

I read UART part in nRF52 v13 document.
There is following paragraph

The UART driver can use multiple instances of the UART/UARTE peripherals, and it provides a common API for both peripheral types.

I guess it means that if there are the multiple instances then nRF52832 can do multiple UART connection.

[awneil]

See: infocenter.nordicsemi.com/index.jsp

As it says, "UART" and "UARTE" are different UART hardware implementations - that does not mean that both are present together on the same chip!

You will have one or the other - not both.

[neosarchizo]

@awneil Thanks!

[neosarchizo]

@awneil
So I created UART emulation by GPIO.