USART (Universal Synchronous and Asynchronous Receiver-Transmitter)

API

Macros

This optional macro must be defined before including the driver:

#define USART_RX_BUF_N <fill-with-buffer-size>

The default size is 32 bytes.

Includes

#include "usart.ceu"

Code Abstractions

USART_Init

Initializes the USART.

code/await USART_Init (var int bps) -> NEVER;

Parameters:

• int: transmission speed in bps

Return:

• NEVER: never returns

USART_Tx

Transmits a given buffer.

code/await USART_Tx (var&[] byte buf) -> none;

Parameters:

• &[] byte: reference to buffer to transmit

Return:

• none: as soon as the transmission terminates

The given buffer is copied to the driver buffer, which transmits the bytes in the background.

USART_Rx

Receives incoming bytes to a given buffer.

code/await USART_Rx (var&[] byte buf, var usize? n) -> none;

Parameters:

• &[] byte: reference to buffer to receive
• usize?: minimum number of bytes to receive (default: as soon as something is received)

Return:

• none: as soon as the requested number of bytes is received

Examples

TODO