An invalid value is acquired by Uart communication.

RE: An invalid value is acquired by Uart communication.

haakonsh — Wed, 16 Oct 2019 09:04:39 GMT

Aww that sucks! I'm glad to hear you've located the root cause though :)

RE: An invalid value is acquired by Uart communication.

Sawada — Tue, 15 Oct 2019 23:41:55 GMT

I'm sorry. Due to the actions we added on our own, an overrun occurred and invalid data was received.

RE: An invalid value is acquired by Uart communication.

haakonsh — Tue, 08 Oct 2019 10:51:47 GMT

Can it be the result of the oscilloscope probe capacitively loading the data line?

Can you show us the scope in question?

Is the HFXO running when you're using the UART?

RE: An invalid value is acquired by Uart communication.

Sawada — Mon, 07 Oct 2019 23:59:53 GMT

Host CPU ----uart----> BLE

expect command: [10 02 00 06 00 01 00 00 10 03 04]

unexpect command: [10 02 02 06 00 00 01 00 00 10 03 04]

The expected command is received continuously every 100ms on BLE device.

The device may receive an unexpected command once every 10 minutes.

However, when I check with an oscilloscope, it is an expected command.

RE: An invalid value is acquired by Uart communication.

awneil — Mon, 07 Oct 2019 14:17:26 GMT

Far too little information to comment!