38.2.2.1 usart_dma_init

int32_t usart_dma_init(
    struct usart_dma_descriptor *const descr,
    void *const hw,
    void *const func
)

This function initializes the given I/O descriptor to be used as USART interface descriptor. It checks if the given hardware is not initialized and if the given hardware is permitted to be initialized.

Parameters

descr

Type: struct usart_dma_descriptor Struct *const

A USART descriptor which is used to communicate via the USART

hw

Type: void *const

The pointer to the hardware instance

func

Type: void *const

The pointer to as set of functions pointers

Returns

Type: int32_t

Initialization status.

-1

Passed parameters were invalid or the interface is already initialized

0

The initialization is completed successfully