UART DMA and CTS

[lsrbigfoot]

Does the UART-CTS input signal (when activated) have the ability to block/unblock UART-Tx DMA traffic automatically (without processor intervention)?

If not, then what extra controls are required to make this happen?

[mjbcswitzerland · Accepted solution]

Hi

Check the UART MODEM register for the part type that you are using.

The control bit TXCTSE enables CTS control of the transmitter, which also pauses DMA transmission.

Regards

Mark