Hello!
I need to program a comunication between 2 DSP (28335 and 28035) with a RS485 bus. The drivers used for adapt signals has a TX enable pin. This pin must remain in '0' for enable the reception, and must be seted for transmit data. When I begin a transmission, my program set this pin correctly. For detect when the transmision is finished, I use the TXRDY interrupt, but if I clear the TX enable in that moment, there are 4 bits in buffer, and the transmision ends before this bits are sent. For detect when all bits have been sent, the DSP has a TXEMPTY bit, but this bit does no set an interrupt... The solution that I have implemented is check this bit by polling... There is any other solution for detect when all bits are sent for clear the TXENABLE pin? Thanks everybody!!