LPC17xx-DFU-Bootloader
LPC17xx-DFU-Bootloader copied to clipboard
triffid
DFU Bootloader for LPC17xx family
Hold P2.12 low during reset to force DFU mode even if application firmware is present.
Pinouts for the SD card are at https://github.com/triffid/LPC17xx-DFU-Bootloader/blob/develop/main.c#L211
A basic instruction on using dfu-util: https://github.com/Smoothieware/Smoothieware/blob/edge/src/makefile#L126-L127
LED pins are set as outputs and toggled during bootloader: https://github.com/triffid/LPC17xx-DFU-Bootloader/blob/develop/pins.h#L47-L51
Some other pins are set output/low ( https://github.com/triffid/LPC17xx-DFU-Bootloader/blob/develop/main.c#L196-L200 ) due to this bootloader being predominantly designed for Smoothieboard.
If the bootloader finds a file named "firmware.bin" on the FAT32-formatted SD card's first partition, it will flash it to the application region (0x4000, +16k - see https://github.com/triffid/LPC17xx-DFU-Bootloader/blob/develop/lpc1769.ld#L34-L35 ), and after successful flashing, rename the file to "firmware.cur" - 'cur' meaning 'current'.
triffid