I am using STM32F103RET6 microcontroller. On my PCB, the USART1 channel is used as RS485 communication with a SN65HVD11HD transceiver. That means to transmit/receive each character, the direction pins RE, DE pin of the transceiver has to be controlled. Can I still use the internal bootloader inside the micro developed by ST?
If I cannot, is there an example about how to develop the bootloader myself?