nRF51822 how many UARTS

RE: nRF51822 how many UARTS

joshjack — Sat, 14 Sep 2013 11:15:27 GMT

Any code examples, or is my app_uart_init correct?

RE: nRF51822 how many UARTS

Bastiaan — Fri, 13 Sep 2013 05:03:50 GMT

Yes, as Hung said, you can do that. All digital peripherals can be connected to any pin, so as long as you don't need any of them concurrently, you can switch at will.

RE: nRF51822 how many UARTS

Guest — Fri, 13 Sep 2013 05:03:50 GMT

Yes, as Hung said, you can do that. All digital peripherals can be connected to any pin, so as long as you don't need any of them concurrently, you can switch at will.

RE: nRF51822 how many UARTS

joshjack — Thu, 12 Sep 2013 22:33:36 GMT

Looking at the nRF51822 SDK documentation if I'm following it correctly, I can define any GPIO pins to be a UART using the app_uart_init function. I don't need 2 concurrent UARTS, but am I right in assuming I can setup two seperate UARTS and then swap between them using this function?

Anyone have a code example?

RE: nRF51822 how many UARTS

Hung Bui — Tue, 10 Sep 2013 07:05:34 GMT

The nRF51822 has only 1 UART hardware peripheral. You can do the bit banging to have more but I don't think it's the case here. You can refer to the nRF51 Reference Manual for more information about the nRF51822.

Regarding the GPIO, the nRF51822 has the Pin Crossbar feature that you can chose and connect any GPIO pins as UART's (or SPI/TWI etc) pins. And you can change these pins in runtime. Which means, if you don't need 2 UARTs running concurrently, you can use 1 UART and switch between the pins to interface with 2 devices.