4.1 KiB
4.1 KiB
Flash Tool for Aruba AP-105
Tool to exchange Aruba AP-105 boot loader stored on a MX25L12835 flash chip with uboot for flashing OpenWRT with an RaspberryPi.
Prepare
Requirements:
- RaspberryPi
- Programming clip SOIC16/SOP16 and cabling
- Raspbian
- enabled SPI interface
flashromtool
Configure SPI on the RaspberryPi:
sudo raspi-config
# Select Interfacing Options
# Select SPI
# Select Yes
# Select Ok
# Leave with finish or ESC
To install flashrom:
sudo apt-get install flashrom
Connect the AP105 Flash chip. The red status LED on AP105 must glow
*-------------------------------------*
| |
| ------|MX25L12835------ |
| | | |
| *-----|1 HOLD#/SIO3 CLK 16 |---|----*
| *-----|2 VCC SI/SIO0 15 |---* |
| | |3 RESET# | |
| | |4 | |
| | |5 | |
| | |6 | |
| | *--|7 CS# GND 10 |------* |
| *-|-----|8 SO/SIO1 WP#/SIO2 |-* | |
| | | | ----------------------- | | |
| | | | | | |
| | *-------------------------------* | |
| | | | | |
| | | *-------------------------------* | |
| | | | | |
| | | --------|RaspberryPi|------- | | |
| | | | 1 2| | | |
| | | | 3 4| | | |
| | | | 5 6| | | |
| | | | 7 8| | | |
| | | | 9 10| | | |
| | | |11 12| | | |
| | | |13 14| | | |
| | | |15 16| | | |
| | *---|17 +3V3 18| | | |
| *-----|19 MOSI/GPIO 20| | | |
*-------|21 MISO/GPIO 22| | | |
*-----|23 SCLK/GPIO GPIO 8/CE0# 24|-* | |
| *---|25 GND 26| | |
| | |27 28| | |
| | |29 30| | |
| | |31 32| | |
| | |33 34| | |
| | |35 36| | |
| | |37 38| | |
| | |39 40| | |
| | ---------------------------- | |
| | | |
| *------------------------------------* |
*----------------------------------------*
Usage
ap105-flash <SERIAL NUMBER>
The flash will be secured into files:
AP105-<SERIAL NUMBER>-dump0.romAP105-<SERIAL NUMBER>-dump1.rom
The AP105-<SERIAL_NUMBER>-dump0.rom will be patched with uboot binary uboot.bin and the file AP105-<SERIAL NUMBER>-patch.rom will be created.
After a confirmation the patched file will be flashed to the device.
Known problems
Chip isn't detected by flashrom
- Check the wiring
- Ensure the RaspberryPi have enough power like a power supply with 5V/2A
- Ensure the red LED is illuminated on the AP105
- Reduce the SPI speed to 1000 kHz (default 16500 kHz)
SPEED=1000 ap105-flash <SERIAL NUMBER>
flashrom fails during erase
- Check power supply
- Reduce the SPI speed like described above