// uart.h

typedef struct _UART_HARDWARE_DRIVER {
  UART_INITIALIZE_PORT InitializePort;
  UART_SET_BAUD        SetBaud;
  UART_GET_BYTE        GetByte;
  UART_PUT_BYTE        PutByte;
  UART_RX_READY        RxReady;
  UART_SET_POWER_D0    SetPowerD0;
  UART_SET_POWER_D3    SetPowerD3;
} UART_HARDWARE_DRIVER, *PUART_HARDWARE_DRIVER;
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Windows Driver Kit DDI reference (ns-uart-_uart_hardware_driver)

_UART_HARDWARE_DRIVER structure

Description

Contains function pointers for interacting with a specific type of UART hardware. Generally, there should be one instance of this structure for each supported hardware device. The function pointers are not expected to change at runtime.

Members

`InitializePort`

A pointer to a UART_INITIALIZE_PORT callback function to initialize/reset the UART hardware. This function must be called before calling any other driver functions.

`SetBaud`

A pointer to a UART_SET_BAUD callback function that sets the baud rate of the UART hardware to the specified value.

`GetByte`

A pointer to a UART_GET_BYTE callback function that reads a byte from the UART device.

`PutByte`

A pointer to a UART_PUT_BYTE callback function that writes a byte to the UART device.

`RxReady`

A pointer to a UART_RX_READY callback function that determines whether there is data pending in the UART hardware.

`SetPowerD0`

For information about Windows power states, see Device Power States

`SetPowerD3`