UART

UART configuration and control. More...

Modules
	UART Definitions
	UART Exported Variables
	UART Functions
	UART Private Variables
	UART Types

Functions
static enum sd_uart_err	sd_uart_dev_init (struct sd_uart_dev *dev, UART_HandleTypeDef *huart)
	UART Device Initialization Initialize UART device structure. More...
static enum sd_uart_err	sd_uart_rx_isr (struct sd_uart_dev *dev)
	Receive Interrupt Routine. More...
static void	sd_uart_err_cb (struct sd_uart_dev *dev)
	Handle UART errors. More...

Detailed Description

UART configuration and control.

Function Documentation

sd_uart_dev_init()

enum sd_uart_err sd_uart_dev_init ( struct sd_uart_dev *  dev, UART_HandleTypeDef *  huart  )

static

#include <Src/sd_uart.c>

UART Device Initialization Initialize UART device structure.

Parameters

uart_dev

Device structure to initialize

Return values

SD_UART_SUCCESS

on success, error state otherwise

{
    if (huart == NULL)
        return SD_UART_ERROR;
    
    /* Reset the UART device structure */
    memset(dev, 0, sizeof(struct sd_uart_dev));
  
    dev->uart = huart;      /* Set the UART handle pointer */
    
    
    return SD_UART_SUCCESS;
}

sd_uart_err_cb()

static void sd_uart_err_cb ( struct sd_uart_dev *  dev )

inlinestatic

#include <Src/sd_uart.c>

Handle UART errors.

Parameters

huart

UART handle with error triggered error interrupt

Return values

none

{
  /* Handle errors */
}

sd_uart_rx_isr()

enum sd_uart_err sd_uart_rx_isr ( struct sd_uart_dev *  dev )

inlinestatic

#include <Src/sd_uart.c>

Receive Interrupt Routine.

Note

This function is called from within the interrupt handler when the the RXNE interrupt is enabled and set.

Parameters

dev	The UART peripheral that triggered interrupt

Return values

SD_UART_SUCCESS

on success, error status otherwise

Put the character in the current buffer

{
    struct sd_cbuf *rx_buff = dev->rx_buff;
    UART_HandleTypeDef *huart = dev->uart;
    uint16_t mask = huart->Mask;

    rx_buff->buff[rx_buff->in++] = (uint8_t)(huart->Instance->RDR & (uint8_t)mask);
    
    /* Wrap buffer if at the end */
    if (rx_buff->in >= rx_buff->size)
        rx_buff->in = 0;

    if (++rx_buff->len >= rx_buff->size) {
        rx_buff->state = SD_BUFF_OVERFLOW;
        return SD_UART_ERROR;
    }

    return SD_UART_SUCCESS;
}