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STM32F103 internal bootloader work on RS485?

Question asked by Jian Chen on Oct 25, 2017



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?


Thanks, Jian