Exemple #1
0
/**
 * @brief Initialize UART channel
 *
 * This routine is called to reset the chip in a quiescent state.
 * It is assumed that this function is called only once per UART.
 *
 * @param dev UART device struct
 *
 * @return 0
 */
static int uart_stm32_init(struct device *dev)
{
	const struct uart_stm32_config *config = DEV_CFG(dev);
	struct uart_stm32_data *data = DEV_DATA(dev);
	UART_HandleTypeDef *UartHandle = &data->huart;

	__uart_stm32_get_clock(dev);
	/* enable clock */
#if defined(CONFIG_SOC_SERIES_STM32F1X) || defined(CONFIG_SOC_SERIES_STM32L4X)
	clock_control_on(data->clock, config->clock_subsys);
#elif defined(CONFIG_SOC_SERIES_STM32F4X)
	clock_control_on(data->clock,
			(clock_control_subsys_t *)&config->pclken);
#endif

	UartHandle->Instance = UART_STRUCT(dev);
	UartHandle->Init.WordLength = UART_WORDLENGTH_8B;
	UartHandle->Init.StopBits = UART_STOPBITS_1;
	UartHandle->Init.Parity = UART_PARITY_NONE;
	UartHandle->Init.HwFlowCtl = UART_HWCONTROL_NONE;
	UartHandle->Init.Mode = UART_MODE_TX_RX;
	UartHandle->Init.OverSampling = UART_OVERSAMPLING_16;

	HAL_UART_Init(UartHandle);

#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	config->uconf.irq_config_func(dev);
#endif
	return 0;
}
Exemple #2
0
/**
 * @brief Initialize UART channel
 *
 * This routine is called to reset the chip in a quiescent state.
 * It is assumed that this function is called only once per UART.
 *
 * @param dev UART device struct
 *
 * @return 0
 */
static int uart_stm32_init(struct device *dev)
{
	const struct uart_stm32_config *config = DEV_CFG(dev);
	struct uart_stm32_data *data = DEV_DATA(dev);
	USART_TypeDef *UartInstance = UART_STRUCT(dev);

	__uart_stm32_get_clock(dev);
	/* enable clock */
	if (clock_control_on(data->clock,
			(clock_control_subsys_t *)&config->pclken) != 0) {
		return -EIO;
	}

	LL_USART_Disable(UartInstance);

	/* TX/RX direction */
	LL_USART_SetTransferDirection(UartInstance,
				      LL_USART_DIRECTION_TX_RX);

	/* 8 data bit, 1 start bit, 1 stop bit, no parity */
	LL_USART_ConfigCharacter(UartInstance,
				 LL_USART_DATAWIDTH_8B,
				 LL_USART_PARITY_NONE,
				 LL_USART_STOPBITS_1);

	if (config->hw_flow_control) {
		uart_stm32_set_hwctrl(dev, LL_USART_HWCONTROL_RTS_CTS);
	}

	/* Set the default baudrate */
	uart_stm32_set_baudrate(dev, data->baud_rate);

	LL_USART_Enable(UartInstance);

#ifdef USART_ISR_TEACK
	/* Wait until TEACK flag is set */
	while (!(LL_USART_IsActiveFlag_TEACK(UartInstance)))
		;
#endif /* !USART_ISR_TEACK */

#ifdef USART_ISR_REACK
	/* Wait until REACK flag is set */
	while (!(LL_USART_IsActiveFlag_REACK(UartInstance)))
		;
#endif /* !USART_ISR_REACK */

#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	config->uconf.irq_config_func(dev);
#endif
	return 0;
}