### USBPD_HW_IF_GlobalHwInit / USBPD_HW_IF_PortHwInit

Source: https://context7.com/usb-c/stusb1602/llms.txt

Initializes the USB-PD hardware stack. `USBPD_HW_IF_GlobalHwInit` initializes shared hardware, and `USBPD_HW_IF_PortHwInit` sets up a specific port and registers PD policy engine callbacks.

```APIDOC
## Hardware Interface Layer (USB-PD Middleware)

### Description
Initializes the USB-PD hardware stack. `USBPD_HW_IF_GlobalHwInit` initializes shared hardware (ADC, DMA, timers). `USBPD_HW_IF_PortHwInit` sets up a specific port with its SPI engine, DMA channels, and registers the PD policy engine callbacks.

### Methods
- **USBPD_HW_IF_GlobalHwInit**: Initializes global hardware resources for USB-PD.
- **USBPD_HW_IF_PortHwInit**: Initializes a specific USB-PD port.

### Parameters
- **port_number**: The identifier for the USB-PD port (e.g., 0).
- **pd_cbs**: A struct containing callbacks for PD events (e.g., `PD_TxCompleted_Callback`, `PD_RxCompleted_Callback`).
- **initial_role**: The initial power role for the port (e.g., `USBPD_PORTPOWERROLE_DRP`).

### Return Value
- **USBPD_StatusTypeDef**: Returns `USBPD_OK` on success, or an error code otherwise.
```