UART HW FLOW Control testing

RE: UART HW FLOW Control testing

Simonr — Mon, 15 Apr 2019 13:11:48 GMT

Hi Justin

Due to the Easter holiday you will have to expect a delay in replies, sorry for the inconvenience!

Yes, for the most part, this is normal. However, eventually, when you have flow control disabled, your application is likely to receive damaged data and not fix it automatically, as the flow control takes care of that.

Best regards and happy Easter,

Simon

RE: UART HW FLOW Control testing

Justin_Yeh — Mon, 15 Apr 2019 02:46:02 GMT

enable & disable are the same, Is it normal ?

RE: UART HW FLOW Control testing

Simonr — Fri, 29 Mar 2019 09:16:04 GMT

Yes, this is normal. You can try disabling the flow control by using the APP_UART_FLOW_CONTROL_DISABLED functionif you want to see what happens when flow control isn't enabled.

Best regards,

Simon

RE: UART HW FLOW Control testing

Justin_Yeh — Fri, 29 Mar 2019 01:37:50 GMT

But, even uart data transmission complete, the CTS/RTS still keep low, Is it normal ?

Nordic uart library doesn't control these pins ? because CTS/RTS always keep low.

RE: UART HW FLOW Control testing

Simonr — Thu, 28 Mar 2019 13:34:17 GMT

The UART flow control by default is active low on both these pins, which is why they are low during data transmission, so this is totally normal.

You should be able to control these lines fully in software. For example, you can based on the logic levels on the pins, start and stop the UART to receive or transmit serial data.

Best regards,

Simon