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FRDM K22F Bootloader Communication

Question asked by njdesmarais on May 27, 2020
Latest reply on Jun 2, 2020 by Jing Pan



I have a FRDM-K22F development board with an MCU flash-resident bootloader. I'm writing an application to utilize the flash commands described in the MCU Bootloader v2.5.0 Reference manual. My issue is that when I place the board into bootloader mode (via holding reset during power on), I can no longer communicate over the OpenSDA Serial Port (it no longer appears on a list of open ports). I had read something about redirecting the UART signal, but had no luck.