Driver / Extension UART

Driver for the UART serial communication peripheral. More...

Functions
void	exuart_Init (uint32_t baudRate)
	Initializes the UART module. More...
void	exuart_SendByteAsync (uint8_t data)
	Asynchronously sends the given byte through the UART bus. More...
void	exuart_SendBytesAsync (uint8_t *data, int length)
	Asynchronously sends the given bytes through the UART bus. More...
uint16_t	exuart_ReceivedBytesCount (void)
	Gets the number of bytes received and ready to read. More...
uint8_t	exuart_GetByte (void)
	Gets the next received byte. More...

Detailed Description

Driver for the UART serial communication peripheral.

This driver controls the UART peripheral of the STM32, connected to the digital extension connector.

Call exuart_Init() first in the initialization code. To send data, call exuart_SendByteAsync(). To receive data, check first that bytes are available by calling exuart_ReceivedBytesCount(), then call exuart_GetByte().

Function Documentation

exuart_GetByte()

uint8_t exuart_GetByte

(

void

)

Gets the next received byte.

Returns

the value of the received byte.

Remarks

call exuart_ReceivedBytesCount() before calling this function.

Warning

this function return 0 if no byte is available.

exuart_Init()

void exuart_Init

(

uint32_t

baudRate

)

Initializes the UART module.

Parameters

baudRate

UART communication frequency (baud rate) [b/s].

exuart_ReceivedBytesCount()

uint16_t exuart_ReceivedBytesCount

(

void

)

Gets the number of bytes received and ready to read.

Returns

the number of bytes ready to be acquired with exuart_GetByte().

Remarks

This function must called often, otherwise the DMA RX buffer may be full, and data will be lost.

exuart_SendByteAsync()

void exuart_SendByteAsync

(

uint8_t

data

)

Asynchronously sends the given byte through the UART bus.

Parameters

data	the data byte to send.

exuart_SendBytesAsync()

void exuart_SendBytesAsync	(	uint8_t *	data,
		int	length
	)

Asynchronously sends the given bytes through the UART bus.

Parameters

data	pointer to the data bytes array to send.
length	number of bytes to send (array size).