readme: add note about alternative methods of flashing

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>
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Eric Callahan 2022-04-14 15:15:16 -04:00
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@ -37,7 +37,11 @@ The menuconfig will present the following options:
if the LED is on when the pin is low. For example, the status LED Pin for a
"blue pill" is !PC13.
Once configured and built flash with a programmer such as an ST-Link.
Once configured and built flash with a programmer such as an ST-Link. If you
don't have a programmer available, it should be possible to flash STM32F103
devices via UART and STM32F042/72 devices over DFU. ST's STM32CubeProgrammer
software can facilitate all of these methods, however there are also other
tools such as `stm32flash` (UART) and `dfu-util` (USB DFU).
## Uploading a Program
1) Build Klipper with CAN support and with the "8KiB" bootloader setting enabled.