RE: Multiple serial "ports" on nRF51822, e.g., using app_uart module from SDK with UIDs?

Nguyen Hoan Hoang — Fri, 07 Nov 2014 20:02:42 GMT

The C0 still works with SDK6, SDK5 too. You are not stuck with 4. I don't recall app_uart issuing UID. Do you mean UID for BLE ? You don't need to reinit each time. You just need to switch pin map for the UART, provide 2 both use the same baudrate. But that is only good for transmit, you may have issue on receive. Unless you use hardware handshaking.

RE: Multiple serial "ports" on nRF51822, e.g., using app_uart module from SDK with UIDs?

David Robins — Fri, 07 Nov 2014 19:49:48 GMT

Yes, you need to bracket usage of each port with app_uart_init and app_uart_close, and you should reuse the UID you got back from the first app_uart_init when re-initializing a peripheral.

I've been doing something similar; note, however, I've found that app_uart_close does not do a proper shutdown; it disables the UART before receive/transmit are finished, resulting in lost data if transmit or receive are happening at the time of shutdown (you'll be fine if you pre-arrange with the other device to shut down first). I'll be making a post on the issue I found and a fix (search on app_uart_close).