At present, only FIT images are supported via the SparX-5i eval board's U-Boot, which must contain a valid load address. If you are using this board, after selecting your base configuration, run the following command to supplement the existing config with the required FIT options:
make board-enable-sparx-fit
- Don't load a corrupt bootloader to begin with
- Done
If, for some reason, you didn't manage to follow step 1, you can use
the FLASH_PROG(J4) connector on the board to access the SPI flash
directly.
Using a Bus Blaster in combination with dangerspi, you can load a new bootloader. The schematic below details how to connect the Bus Blaster to the board, but the concept should be portable to any debugger/device based around an FTDI2232 chip.
Bus Blaster: FLASH_PROG (J4):
.---. .---.
VTG >o o| VTG SCK >o o| GND
TRST |o o| GND MISO |o o| #RESET_FLASH
TDI |o o| GND o o| 3V3
TMS |o o| GND #CS |o o| #SYSRESET
TCK o o| GND MOSI |o o| GND
RTCK o o| GND '---'
TDO |o o| GND
TSRST |o o| GND
DBGRQ |o o| GND
DBGACK |o o| GND
'---'
| Bus Blaster | FLASH_PROG |
|---|---|
VTG |
3V3 |
GND |
GND |
VTG |
#RESET_FLASH |
GND |
#SYSRESET |
TDI |
MOSI |
TMS |
#CS |
TCK |
SCK |
TDO |
MISO |
With the cable in place, build U-Boot with the correct configuration:
make fireant_boot_defconfig && make
To flash it to the board, connect the cable to J4 and run:
make board-sparx-flash-uboot