This is a MicroPython board definition file for the G30HDR from ghielectronics.

The G30HDR isn't made any more, but the product page can be found here: https://www.ghielectronics.com/catalog/product/538

Build the firmware using:

cd micropython/stmhal/boards
git clone https://github.com/dhylands/G30HDR.git
cd ..
make BOARD=G30HDR

The G30HDR has a spot for a voltage regulator on the board, but it isn't populated by default. A LM1117MP-3.3 is spec'd in the schematics, along with a 10 uF polarized capacitor. You can leave the regulator unpopulated and power the board using the 3.3v pin.

To get the device in DFU mode, you need to connect BOOT0 which is the test point located near R6 to 3.3v, while powering up or RESETing the device.

Once in DFU mode, you should be able to use the dfu-list command and see something like this:

Found DFU: [0483:df11] ver=2200, devnum=45, cfg=1, intf=0, alt=3, name="@Device Feature/0xFFFF0000/01*004 e", serial="348E37423533"
Found DFU: [0483:df11] ver=2200, devnum=45, cfg=1, intf=0, alt=2, name="@OTP Memory /0x1FFF7800/01*512 e,01*016 e", serial="348E37423533"
Found DFU: [0483:df11] ver=2200, devnum=45, cfg=1, intf=0, alt=1, name="@Option Bytes  /0x1FFFC000/01*016 e", serial="348E37423533"
Found DFU: [0483:df11] ver=2200, devnum=45, cfg=1, intf=0, alt=0, name="@Internal Flash  /0x08000000/04*016Kg,01*064Kg,03*128Kg", serial="348E37423533"

The G30HDR is read protected. In order to flash MicroPython on it, you need to unprotect it, which will in turn erase the part. This is a one-time operation. Once MicroPython is flashed, the device will remain unprotected.

Unprotect/Erase the device using:

dfu-util -s :unprotect:force -a 0 -d 0483:df11 -D build-G30HDR/firmware.dfu

Now you can flash MicroPython using:

make BOARD=G30HDR deploy

Reboot with BOOT0 unconnected, and it should boot up MicroPython on the REPL:

USB Serial device with vendor 'MicroPython' serial '348E37423533' connected @/dev/ttyACM0
Use Control-Y to exit.
MicroPython v1.5.1-184-g7c8c5d8 on 2015-12-27; G30HDR with STM32F401CE
Type "help()" for more information.
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