Hi everyone,
I should start by introducing the context of my application: I am currently working on a cryptosystem using the MCBSTR9. My evaluation board is connected to a modem through UART0, so I can react to specific modem interrupts (Data Carrier, Ring Indicator, etc...). At a first stage, I am required to sample voice and transmit/receive it via the modem.
My problem is the following: what if no data arrives? Going through the reference manual UM0216, I found out that I can enable the receive timeout interrupt for UART. However, I have been struggling since then with accomplishing an apparently casual functionality: How to set the timeout period for the receive timeout interrupt? especially that I may need to change it during runtime.
Here is why: My application would need to adjust to the modem (DCE) data rate, so if an increase in the data rate is perceived, I would need to adjust the UART baud rate in order to not suffer from any potential overrun. (Please Bear in mind that the microprocessor would be busy doing encryption,decryption,sampling,... in a round robin fashion -- I could have done it using interrupts instead, maybe I will - so I would not want to lose any data arriving from the modem before I can actually process it--.
Hope I was clear enough.
Thank you for your help
Why change the baudrate? Just set a baudrate that is fast enough to handle the best transfer rate possible by the modem.
Are you working with a protocol which separates packets with a number of ms or character periods of silence, or why do you need timeout-processing?