Since virtually all the ARM7 can do half duplex RS485 in hardware (normally using the processor’s RTS line to control transmit / receive on the RS485), is there a way to put the UART in this RS485 mode? What I’m really looking for is getting at the low level ioctl calls from OpenAT.
If I want to control the registers directly, can I do that from C code via OpenAT? Is OpenAT based on glibc (or ulibc) in that these things are in the header files, etc.?
Also, any idea what ARM7 is used in the Q24 modules series? It would help to determine if it supports the mode we are looking for.
Any help would be appreciated to keep our project moving.