Hello All,
I am implementing hardware handshaking with USART on AT91RM9200 board (24.6.3.12 in data sheet). I need to make RTS signal orignating from CP drop to allow the remote device with which the CPU is communicating t transmit information to the CPU. The data sheet states that the USAR needs requires the use of the PDC (peripheral DMA controller) fo reception when using hardware handshaking. I have used the PD successfully before to talk (send/receive) to other peripherals, and ca successfully use it to send out the USART, but even though I believe t have configured the PDC reception correctly, the RTS signal does not dro low. Is there something else that I need to do besides set up PDC an enable receive on USART?
Another Question:
Does hardware handshaking work for both synchronous and asynchronou transmission? I assume so, as I haven't read otherwise in the dat sheet.
Thank you very much for your help.
Joshua
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