# B-G474E-DPOW1 Keil DCDC Starter

Starter project for Keil MDK/uVision and the ST B-G474E-DPOW1 Discovery kit.

What is included:

- `printf` retarget to ST-LINK VCP: USART3 on PC10/PC11, 115200 baud.
- HRTIM1 Timer C setup for the onboard buck leg: PB12/PB13, 200 kHz, complementary outputs, dead-time.
- ADC monitor for PA1 VIN, PA2 input current average, PA3 VOUT.
- Readable voltage/current protection and a small starter PI voltage loop.

Important safety defaults:

- `DCDC_POWER_STAGE_ENABLE` is `0` in `Core/Inc/app_config.h`. The firmware configures peripherals and prints measurements, but HRTIM outputs remain disabled.
- Before setting it to `1`, check JP1/JP5, use a current-limited VIN source, connect a safe load, and verify PB12/PB13 dead-time with an oscilloscope.
- `DCDC_CONNECT_USBPD_INPUT` is also `0`. Set it to `1` only if JP1 is prepared to feed VIN from USB-PD and the USB-PD source is appropriate.

Open `B-G474E-DPOW1_DCDC.uvprojx` in Keil and build the target `B-G474E-DPOW1_DCDC`.

The project references the local Keil packs under `C:\Keil_v5\ARM\Packs`. If Keil is installed elsewhere, update the include paths and startup file path in the uVision project options.