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MQX serial driver on K70

Question asked by Louie Moye on Jun 26, 2017
Latest reply on Jun 28, 2017 by Louie Moye



I'm using MQX 4.1, CW10.6, K70 processor.  I'm trying to get the MQX Serial-device driver working on UART3.  I've enabled BSPCFG_ENABLE_TTYD, and everything seems to be initializing correctly as _io_fopen() get a valid file pointer; However, I am never seeing any activity on the serial transmit pin when I do an _io_fwrite().  I suspect a pin configuration problem.  I'm not sure how select the required pins and cannot find any clues in the MQX driver docs.  I'm using PTE4/5 for the tx/rx lines to my RS-232 transceiver.  Any help would be much appreciated.