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rt-thread-official/bsp/ft32/libraries/Drivers/drv_usart.c

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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-03-02 FMD-AE first version
*/
#include "board.h"
#include "drv_usart.h"
#include "drv_config.h"
#ifdef RT_USING_SERIAL
//#define DRV_DEBUG
#define LOG_TAG "drv.usart"
#include <drv_log.h>
#if !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2)
#error "Please define at least one BSP_USING_UARTx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
#ifdef RT_SERIAL_USING_DMA
static void ft32_dma_config(struct rt_serial_device *serial, rt_ubase_t flag);
#endif
enum
{
#ifdef BSP_USING_UART1
UART1_INDEX,
#endif
#ifdef BSP_USING_UART2
UART2_INDEX,
#endif
};
static struct ft32_uart_config uart_config[] =
{
#ifdef BSP_USING_UART1
UART1_CONFIG,
#endif
#ifdef BSP_USING_UART2
UART2_CONFIG,
#endif
};
static struct ft32_uart uart_obj[sizeof(uart_config) / sizeof(uart_config[0])] = {0};
void UART_MspInit(USART_TypeDef *USARTx)
{
GPIO_InitTypeDef GPIO_InitStruct;
if (USARTx == USART1)
{
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
/*GPIO INIT*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_1);
/* USART1 interrupt Init */
NVIC_SetPriority(USART1_IRQn, 5);
NVIC_EnableIRQ(USART1_IRQn);
}
else if (USARTx == USART2)
{
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
/*GPIO INIT*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_1);
/* USART2 interrupt Init */
NVIC_SetPriority(USART2_IRQn, 5);
NVIC_EnableIRQ(USART2_IRQn);
}
}
static rt_err_t ft32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct ft32_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = rt_container_of(serial, struct ft32_uart, serial);
uart->Init.USART_BaudRate = cfg->baud_rate;
uart->Init.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
switch (cfg->flowcontrol)
{
case RT_SERIAL_FLOWCONTROL_NONE:
uart->Init.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
break;
case RT_SERIAL_FLOWCONTROL_CTSRTS:
uart->Init.USART_HardwareFlowControl = USART_HardwareFlowControl_RTS_CTS;
break;
default:
uart->Init.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
break;
}
switch (cfg->data_bits)
{
case DATA_BITS_8:
if (cfg->parity == PARITY_ODD || cfg->parity == PARITY_EVEN)
uart->Init.USART_WordLength = USART_WordLength_9b;
else
uart->Init.USART_WordLength = USART_WordLength_8b;
break;
case DATA_BITS_9:
uart->Init.USART_WordLength = USART_WordLength_9b;
break;
default:
uart->Init.USART_WordLength = USART_WordLength_8b;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_1:
uart->Init.USART_StopBits = USART_StopBits_1;
break;
case STOP_BITS_2:
uart->Init.USART_StopBits = USART_StopBits_2;
break;
default:
uart->Init.USART_StopBits = USART_StopBits_1;
break;
}
switch (cfg->parity)
{
case PARITY_NONE:
uart->Init.USART_Parity = USART_Parity_No;
break;
case PARITY_ODD:
uart->Init.USART_Parity = USART_Parity_Odd;
break;
case PARITY_EVEN:
uart->Init.USART_Parity = USART_Parity_Even;
break;
default:
uart->Init.USART_Parity = USART_Parity_No;
break;
}
#ifdef RT_SERIAL_USING_DMA
uart->dma_rx.last_index = 0;
#endif
UART_MspInit(uart->config->Instance);
USART_Init(uart->config->Instance, &(uart->Init));
USART_Cmd(uart->config->Instance, ENABLE);
return RT_EOK;
}
static rt_err_t ft32_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct ft32_uart *uart;
#ifdef RT_SERIAL_USING_DMA
rt_ubase_t ctrl_arg = (rt_ubase_t)arg;
#endif
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ft32_uart, serial);
switch (cmd)
{
/* disable interrupt */
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_DisableIRQ(uart->config->irq_type);
/* disable interrupt */
USART_ITConfig(uart->config->Instance, USART_IT_RXNE, DISABLE);
#ifdef RT_SERIAL_USING_DMA
/* disable DMA */
if (ctrl_arg == RT_DEVICE_FLAG_DMA_RX)
{
NVIC_DisableIRQ(uart->config->dma_rx->dma_irq);
DMA_DeInit(uart->dma_rx.Instance);
}
else if (ctrl_arg == RT_DEVICE_FLAG_DMA_TX)
{
NVIC_DisableIRQ(uart->config->dma_tx->dma_irq);
DMA_DeInit(uart->dma_rx.Instance);
}
#endif
break;
/* enable interrupt */
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
NVIC_SetPriority(uart->config->irq_type, 1);
NVIC_EnableIRQ(uart->config->irq_type);
/* enable interrupt */
USART_ITConfig(uart->config->Instance, USART_IT_RXNE, ENABLE);
break;
#ifdef RT_SERIAL_USING_DMA
case RT_DEVICE_CTRL_CONFIG:
ft32_dma_config(serial, ctrl_arg);
break;
#endif
case RT_DEVICE_CTRL_CLOSE:
USART_DeInit(uart->config->Instance);
break;
}
return RT_EOK;
}
rt_uint32_t ft32_uart_get_mask(rt_uint32_t word_length, rt_uint32_t parity)
{
rt_uint32_t mask;
if (word_length == USART_WordLength_8b)
{
if (parity == USART_Parity_No)
{
mask = 0x00FFU ;
}
else
{
mask = 0x007FU ;
}
}
else if (word_length == USART_WordLength_9b)
{
if (parity == USART_Parity_No)
{
mask = 0x01FFU ;
}
else
{
mask = 0x00FFU ;
}
}
else if (word_length == USART_WordLength_7b)
{
if (parity == USART_Parity_No)
{
mask = 0x007FU ;
}
else
{
mask = 0x003FU ;
}
}
else
{
mask = 0x0000U;
}
return mask;
}
static int ft32_putc(struct rt_serial_device *serial, char c)
{
struct ft32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ft32_uart, serial);
UART_INSTANCE_CLEAR_FUNCTION(uart->config->Instance, USART_FLAG_TC);
#if defined(SOC_SERIES_FT32F0)
uart->config->Instance->TDR = c;
#else
uart->config->Instance->DR = c;
#endif
while (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_TC) == RESET);
return 1;
}
static int ft32_getc(struct rt_serial_device *serial)
{
int ch;
struct ft32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ft32_uart, serial);
ch = -1;
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_RXNE) != RESET)
{
#if defined(SOC_SERIES_FT32F0)
ch = uart->config->Instance->RDR & ft32_uart_get_mask(uart->Init.USART_WordLength, uart->Init.USART_Parity);
#else
ch = uart->config->Instance->DR & ft32_uart_get_mask(uart->Init.USART_WordLength, uart->Init.USART_Parity);
#endif
}
return ch;
}
static rt_ssize_t ft32_dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction)
{
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(buf != RT_NULL);
if (size == 0)
{
return 0;
}
if (RT_SERIAL_DMA_TX == direction)
{
return size;
}
return 0;
}
/**
* Uart common interrupt process. This need add to uart ISR.
*
* @param serial serial device
*/
static void uart_isr(struct rt_serial_device *serial)
{
struct ft32_uart *uart;
#ifdef RT_SERIAL_USING_DMA
rt_size_t recv_total_index, recv_len;
rt_base_t level;
#endif
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ft32_uart, serial);
/* UART in mode Receiver -------------------------------------------------*/
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_RXNE) != RESET)
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
}
#ifdef RT_SERIAL_USING_DMA
else if ((uart->uart_dma_flag) && (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_RXNE) != RESET))
{
level = rt_hw_interrupt_disable();
recv_total_index = serial->config.bufsz - DMA_GetCurrDataCounter(&(uart->dma_rx.Instance));
recv_len = recv_total_index - uart->dma_rx.last_index;
uart->dma_rx.last_index = recv_total_index;
rt_hw_interrupt_enable(level);
if (recv_len)
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_DMADONE | (recv_len << 8));
}
USART_ClearFlag(uart->config->Instance, USART_IT_IDLE);
}
else if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_TC) != RESET)
{
if ((serial->parent.open_flag & RT_DEVICE_FLAG_DMA_TX) != 0)
{
}
UART_INSTANCE_CLEAR_FUNCTION(uart->config->Instance, USART_FLAG_TC);
}
#endif
else
{
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_ORE) != RESET)
{
USART_ClearFlag(uart->config->Instance, USART_FLAG_ORE);
}
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_NE) != RESET)
{
USART_ClearFlag(uart->config->Instance, USART_FLAG_NE);
}
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_FE) != RESET)
{
USART_ClearFlag(uart->config->Instance, USART_FLAG_FE);
}
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_PE) != RESET)
{
USART_ClearFlag(uart->config->Instance, USART_FLAG_PE);
}
#if !defined(SOC_SERIES_FT32F0)
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_LBD) != RESET)
{
UART_INSTANCE_CLEAR_FUNCTION(uart->config->Instance, USART_FLAG_LBD);
}
#endif
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_CTS) != RESET)
{
UART_INSTANCE_CLEAR_FUNCTION(uart->config->Instance, USART_FLAG_CTS);
}
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_TXE) != RESET)
{
UART_INSTANCE_CLEAR_FUNCTION(uart->config->Instance, USART_FLAG_TXE);
}
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_TC) != RESET)
{
UART_INSTANCE_CLEAR_FUNCTION(uart->config->Instance, USART_FLAG_TC);
}
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_RXNE) != RESET)
{
UART_INSTANCE_CLEAR_FUNCTION(uart->config->Instance, USART_FLAG_RXNE);
}
}
}
#ifdef RT_SERIAL_USING_DMA
static void dma_isr(struct rt_serial_device *serial)
{
struct ft32_uart *uart;
rt_size_t recv_total_index, recv_len;
rt_base_t level;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ft32_uart, serial);
if ((DMA_GetITStatus(uart->dma_rx.Instance, DMA_IT_TC) != RESET) ||
(DMA_GetITStatus(uart->dma_rx.Instance, DMA_IT_HT) != RESET))
{
level = rt_hw_interrupt_disable();
recv_total_index = serial->config.bufsz - DMA_GetCurrDataCounter(uart->dma_rx.Instance);
if (recv_total_index == 0)
{
recv_len = serial->config.bufsz - uart->dma_rx.last_index;
}
else
{
recv_len = recv_total_index - uart->dma_rx.last_index;
}
uart->dma_rx.last_index = recv_total_index;
rt_hw_interrupt_enable(level);
if (recv_len)
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_DMADONE | (recv_len << 8));
}
}
}
#endif
#if defined(BSP_USING_UART1)
void USART1_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&(uart_obj[UART1_INDEX].serial));
/* leave interrupt */
rt_interrupt_leave();
}
#if defined(RT_SERIAL_USING_DMA) && defined(BSP_UART1_RX_USING_DMA)
void UART1_DMA_RX_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
__DMA_IRQHandler(uart_obj[UART1_INDEX].dma_rx.Instance);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* defined(RT_SERIAL_USING_DMA) && defined(BSP_UART1_RX_USING_DMA) */
#if defined(RT_SERIAL_USING_DMA) && defined(BSP_UART1_TX_USING_DMA)
void UART1_DMA_TX_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
__DMA_IRQHandler(uart_obj[UART1_INDEX].dma_tx.Instance);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* defined(RT_SERIAL_USING_DMA) && defined(BSP_UART1_TX_USING_DMA) */
#endif /* BSP_USING_UART1 */
#if defined(BSP_USING_UART2)
void USART2_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&(uart_obj[UART2_INDEX].serial));
/* leave interrupt */
rt_interrupt_leave();
}
#if defined(RT_SERIAL_USING_DMA) && defined(BSP_UART2_RX_USING_DMA)
void UART2_DMA_RX_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
__DMA_IRQHandler(uart_obj[UART2_INDEX].dma_rx.Instance);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* defined(RT_SERIAL_USING_DMA) && defined(BSP_UART2_RX_USING_DMA) */
#if defined(RT_SERIAL_USING_DMA) && defined(BSP_UART2_TX_USING_DMA)
void UART2_DMA_TX_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
__DMA_IRQHandler(uart_obj[UART2_INDEX].dma_tx.Instance);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* defined(RT_SERIAL_USING_DMA) && defined(BSP_UART2_TX_USING_DMA) */
#endif /* BSP_USING_UART2 */
static void ft32_uart_get_dma_config(void)
{
#ifdef BSP_USING_UART1
uart_obj[UART1_INDEX].uart_dma_flag = 0;
#ifdef BSP_UART1_RX_USING_DMA
uart_obj[UART1_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;
static struct dma_config uart1_dma_rx = UART1_DMA_RX_CONFIG;
uart_config[UART1_INDEX].dma_rx = &uart1_dma_rx;
#endif
#ifdef BSP_UART1_TX_USING_DMA
uart_obj[UART1_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_TX;
static struct dma_config uart1_dma_tx = UART1_DMA_TX_CONFIG;
uart_config[UART1_INDEX].dma_tx = &uart1_dma_tx;
#endif
#endif
#ifdef BSP_USING_UART2
uart_obj[UART2_INDEX].uart_dma_flag = 0;
#ifdef BSP_UART2_RX_USING_DMA
uart_obj[UART2_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;
static struct dma_config uart2_dma_rx = UART2_DMA_RX_CONFIG;
uart_config[UART2_INDEX].dma_rx = &uart2_dma_rx;
#endif
#ifdef BSP_UART2_TX_USING_DMA
uart_obj[UART2_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_TX;
static struct dma_config uart2_dma_tx = UART2_DMA_TX_CONFIG;
uart_config[UART2_INDEX].dma_tx = &uart2_dma_tx;
#endif
#endif
}
#ifdef RT_SERIAL_USING_DMA
static void ft32_dma_config(struct rt_serial_device *serial, rt_ubase_t flag)
{
struct rt_serial_rx_fifo *rx_fifo;
DMA_InitTypeDef Init;
struct dma_config *dma_config;
struct ft32_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(flag == RT_DEVICE_FLAG_DMA_TX || flag == RT_DEVICE_FLAG_DMA_RX);
uart = rt_container_of(serial, struct ft32_uart, serial);
if (RT_DEVICE_FLAG_DMA_RX == flag)
{
Init = &uart->dma_rx.Init;
dma_config = uart->config->dma_rx;
}
else /* RT_DEVICE_FLAG_DMA_TX == flag */
{
Init = &uart->dma_tx.Init;
dma_config = uart->config->dma_tx;
}
LOG_D("%s dma config start", uart->config->name);
{
rt_uint32_t tmpreg = 0x00U;
#if defined(SOC_SERIES_FT32F0)
/* enable DMA clock && Delay after an RCC peripheral clock enabling*/
SET_BIT(RCC->AHBENR, dma_config->dma_rcc);
tmpreg = READ_BIT(RCC->AHBENR, dma_config->dma_rcc);
#endif
(void)(tmpreg); /* To avoid compiler warnings */
}
if (RT_DEVICE_FLAG_DMA_RX == flag)
{
}
else if (RT_DEVICE_FLAG_DMA_TX == flag)
{
}
Init.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
Init.MemInc = DMA_MemoryInc_Enable;
Init.PeriphDataAlignment = DMA_PeripheralDataSize_Byte;
Init.MemDataAlignment = DMA_MemoryDataSize_Byte;
if (RT_DEVICE_FLAG_DMA_RX == flag)
{
Init.Direction = DMA_DIR_PeripheralSRC;
Init.Mode = DMA_Mode_Circular;
}
else if (RT_DEVICE_FLAG_DMA_TX == flag)
{
Init.Direction = DMA_DIR_PeripheralDST;
Init.Mode = DMA_Mode_Normal;
}
Init.Priority = DMA_Priority_Medium;
DMA_DeInit(dma_config->Instance);
DMA_Init(dma_config->Instance);
/* enable interrupt */
if (flag == RT_DEVICE_FLAG_DMA_RX)
{
rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
/* Start DMA transfer */
UART_Receive_DMA(uart->config->Instance, rx_fifo->buffer, serial->config.bufsz);
CLEAR_BIT(uart->handle.Instance->CR3, USART_CR3_EIE);
USART_ITConfig(uart->config->Instance, USART_IT_IDLE, ENABLE);
}
/* DMA irq should set in DMA TX mode, or HAL_UART_TxCpltCallback function will not be called */
NVIC_SetPriority(dma_config->dma_irq, 0, 0);
NVIC_EnableIRQ(dma_config->dma_irq);
NVIC_SetPriority(uart->config->irq_type, 1, 0);
NVIC_EnableIRQ(uart->config->irq_type);
LOG_D("%s dma %s instance: %x", uart->config->name, flag == RT_DEVICE_FLAG_DMA_RX ? "RX" : "TX", DMA_Handle->Instance);
LOG_D("%s dma config done", uart->config->name);
}
static void _dma_tx_complete(struct rt_serial_device *serial)
{
struct ft32_uart *uart;
rt_size_t trans_total_index;
rt_base_t level;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ft32_uart, serial);
level = rt_hw_interrupt_disable();
trans_total_index = DMA_GetCurrDataCounter(uart->dma_tx.Instance);
rt_hw_interrupt_enable(level);
if (trans_total_index == 0)
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_TX_DMADONE);
}
}
#endif /* RT_SERIAL_USING_DMA */
static const struct rt_uart_ops ft32_uart_ops =
{
.configure = ft32_configure,
.control = ft32_control,
.putc = ft32_putc,
.getc = ft32_getc,
.dma_transmit = ft32_dma_transmit
};
int rt_hw_usart_init(void)
{
rt_size_t obj_num = sizeof(uart_obj) / sizeof(struct ft32_uart);
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
rt_err_t result = 0;
ft32_uart_get_dma_config();
for (int i = 0; i < obj_num; i++)
{
/* init UART object */
uart_obj[i].config = &uart_config[i];
uart_obj[i].serial.ops = &ft32_uart_ops;
uart_obj[i].serial.config = config;
/* register UART device */
result = rt_hw_serial_register(&uart_obj[i].serial, uart_obj[i].config->name,
RT_DEVICE_FLAG_RDWR
| RT_DEVICE_FLAG_INT_RX
| RT_DEVICE_FLAG_INT_TX
| uart_obj[i].uart_dma_flag
, NULL);
RT_ASSERT(result == RT_EOK);
}
return result;
}
#endif /* RT_USING_SERIAL */
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