Is it possible to remotely program a PCB (that you don't have physical access to) via SAM-BA, if you've got an RS485 transceiver connected to the debug UART on your board (with dedicated H/W on board to manage the RS485 transceiver's TX control)?
In other words, is a 1/2 duplex link on the DBGU adequate for SAM-BA to work, or do you really need a full duplex connection (such as an RS232 transciever connected to the DBGU could provide)?
Do you have to have local, physical access to the PCB to use SAM-BA (i.e., to manually set, clear, or toggle pins on the uC, such as TST or ERASE)?
I'm trying to find a freeware tool to reprogram the application flash on SAM7S uC's that are in remote (i.e., inaccessible) locations, and that have an RS485 port connected to the debug UART that can be used to activate and perform the reprogramming of the application flash. Is SAM-BA adequate for this task, and if not, can anyone point me to a freeware tool that I can use for this?