I believe i’ve hard bricked my RAK4630. Its on a RAK19003 WisBlock Base Board; dmesg has it as a RAK4631. Have had it over a yeaer never did anything with it until now. It always booted to an AT cli, and AT+VER=? gives: RUI_BOOT_0.7_nRF52840
I could always get to [57967.091220] usb 1-4: Product: Open DFU Bootloader
by using AT+BOOT
Anyhow due to my stupidity and screwing up an attempted flash, its broke. Dmesg no longer does anything when its plugged in. single/double RST does nothing either. Red power led is always on. Pretty sure its hosed.
Can I fix it with my Flipper0 and DAP Link? AI had me wire up like so:
- Flipper Pin 10 (SWCLK) $\rightarrow$ SWDCLK pad
- Flipper Pin 12 (SWDIO) $\rightarrow$ SWDIO pad
- Flipper Pin 8 (GND) $\rightarrow$ GND pad
And Im trying to use openocd, with the hex file I got from RAK, but:
$ openocd -f interface/cmsis-dap.cfg -f target/nrf52.cfg -c "adapter speed 50; init; reset halt; nrf52 mass_erase; program firmware-rak4631-2.7.26.54e0d8d.hex verify reset; exit"
Open On-Chip Debugger 0.12.0
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Info : auto-selecting first available session transport "swd". To override use 'transport select <transport>'.
Info : Using CMSIS-DAPv2 interface with VID:PID=0x0483:0x5740, serial=DAP_Ameli93e
Info : CMSIS-DAP: SWD supported
Info : CMSIS-DAP: JTAG supported
Info : CMSIS-DAP: FW Version = 2.0.0
Info : CMSIS-DAP: Serial# = DAP_Ameli93e
Info : CMSIS-DAP: Interface Initialised (SWD)
Info : SWCLK/TCK = 1 SWDIO/TMS = 1 TDI = 1 TDO = 0 nTRST = 1 nRESET = 1
Info : CMSIS-DAP: Interface ready
Info : clock speed 50 kHz
Error: Error connecting DP: cannot read IDR
Ive tried 50, 200, 1000 for speed, all fail. On the Flipper0 DAP link screen I see activity when that ocd command goes though.
Am I doing this right? What else to try?