uart_emul.h File Reference

Backend API for emulated UART. More...

#include <zephyr/device.h>
#include <zephyr/types.h>

Go to the source code of this file.

Typedefs
typedef void(*	uart_emul_callback_tx_data_ready_t) (const struct device *dev, size_t size, void *user_data)
	Define the application callback function signature for uart_emul_callback_tx_data_ready_set() function. More...

Functions
void	uart_emul_callback_tx_data_ready_set (const struct device *dev, uart_emul_callback_tx_data_ready_t cb, void *user_data)
	Set the TX data ready callback. More...
uint32_t	uart_emul_put_rx_data (const struct device *dev, uint8_t *data, size_t size)
	Write (copy) data to RX buffer. More...
uint32_t	uart_emul_get_tx_data (const struct device *dev, uint8_t *data, size_t size)
	Read data from TX buffer. More...
uint32_t	uart_emul_flush_rx_data (const struct device *dev)
	Clear RX buffer content. More...
uint32_t	uart_emul_flush_tx_data (const struct device *dev)
	Clear TX buffer content. More...

Detailed Description

Backend API for emulated UART.

Typedef Documentation

uart_emul_callback_tx_data_ready_t

typedef void(* uart_emul_callback_tx_data_ready_t) (const struct device *dev, size_t size, void *user_data)

Define the application callback function signature for uart_emul_callback_tx_data_ready_set() function.

Parameters

dev	UART device instance
size	Number of available bytes in TX buffer
user_data	Arbitrary user data

Function Documentation

uart_emul_callback_tx_data_ready_set()

void uart_emul_callback_tx_data_ready_set	(	const struct device *	dev,
		uart_emul_callback_tx_data_ready_t	cb,
		void *	user_data
	)

Set the TX data ready callback.

This sets up the callback that is called every time data was appended to the TX buffer.

Parameters

dev	The emulated UART device instance
cb	Pointer to the callback function
user_data	Data to pass to callback function

uart_emul_flush_rx_data()

uint32_t uart_emul_flush_rx_data

(

const struct device *

dev

)

Clear RX buffer content.

Parameters

dev	The emulated UART device instance

Returns

Number of cleared bytes

uart_emul_flush_tx_data()

uint32_t uart_emul_flush_tx_data

(

const struct device *

dev

)

Clear TX buffer content.

Parameters

dev	The emulated UART device instance

Returns

Number of cleared bytes

uart_emul_get_tx_data()

uint32_t uart_emul_get_tx_data	(	const struct device *	dev,
		uint8_t *	data,
		size_t	size
	)

Read data from TX buffer.

Parameters

dev	The emulated UART device instance
data	The address of the output buffer
size	Number of bytes to read

Returns

Number of bytes written to the output buffer

uart_emul_put_rx_data()

uint32_t uart_emul_put_rx_data	(	const struct device *	dev,
		uint8_t *	data,
		size_t	size
	)

Write (copy) data to RX buffer.

Parameters

dev	The emulated UART device instance
data	The data to append
size	Number of bytes to append

Returns

Number of bytes appended