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* serialhdl: Update callers to decide serial fd typeKevin O'Connor2021-03-021-2/+4
| | | | | | | | Don't try to detect a "real serial port" in serialhdl.py. Instead, have the callers invoke either connect_uart(), connect_file(), or connect_pipe(). Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
* spi_flash: support for firmware upgrades via SD CardArksine2021-02-051-0/+1112
This module connects directly to MCU's previously flashed with Klipper, uploads Klipper firmware to an attached SD Card, and performs a device reset to intiate the bootloader's update process. Signed-off-by: Eric Callahan <arksine.code@gmail.com>