I need to interface to a radio module, namely an ANT AP2 module that has some specific requirements for serial communications. The module needs the host to obey the RTS line, which it uses to signal when it can accept more data, and when a message was received. It also has "sleep", "suspend" and "reset" lines that are used for low power states, resetting the module and the like. I should point out that the RTS is not strictly standard.
In the past, I created a driver that operated from the MSP430 interrupts and controlled these signals. Now, the new project is based on the MSP432 and TI-RTOS, and since the RTOS is a new concept for me, I am not sure the best way to proceed.
Would I be better to
1) try and create a new "UART.c/h" and "UART432.c/h" to handle the timing on the IO lines, and try to recreate the RTOS driver for my application
2) Use an Hwi (34) to catch the uart rx and tx interrupt and use more traditional techniques in parallel with the RTOS, and not use the TI-RTOS UART driver, but MSPWare instead.
3) Use some hooks in the RTOS (I can't find any at a character level) to block the sending of characters from the TI-RTOS ring buffers to the hardware when not allowed by the module
4) other (please suggest)
I am not keen on 1), as these are likely to change as upgrades and bugfixes in the RTOS are implemented, and these may break the driver in unusual ways, plus ensuring the RTOS remains stable may be above me.
Many thanks,
Josh
