640 lines
16 KiB
C
640 lines
16 KiB
C
/**
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* @file uart.c
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* @author armfly
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* @author Myth
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* @version 0.1
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* @date 2021.10.11
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* @brief stm32f103x6 串口 FIFO 库
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* @note 请勿更改此文件内容
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*/
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#include "stdio.h"
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#include "sys.h"
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#include "systick.h"
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#include "uart.h"
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COM_PORT_E printf_Com = COM1;
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COM_PORT_E getchar_Com = COM1;
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// USART1 PA9 PA10
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#define USART1_CLK_ENABLE() __HAL_RCC_USART1_CLK_ENABLE()
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#define USART1_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
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#define USART1_TX_GPIO_PORT GPIOA
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#define USART1_TX_PIN GPIO_PIN_9
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#define USART1_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
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#define USART1_RX_GPIO_PORT GPIOA
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#define USART1_RX_PIN GPIO_PIN_10
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// USART2 PA2 PA3
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#define USART2_CLK_ENABLE() __HAL_RCC_USART2_CLK_ENABLE()
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#define USART2_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
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#define USART2_TX_GPIO_PORT GPIOA
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#define USART2_TX_PIN GPIO_PIN_2
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#define USART2_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
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#define USART2_RX_GPIO_PORT GPIOA
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#define USART2_RX_PIN GPIO_PIN_3
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//定义每个串口结构体变量
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#if UART1_FIFO_EN == 1
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static UART_T g_tUART1;
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static uint8_t g_TxBuf1[UART1_TX_BUF_SIZE]; //发送缓冲区
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static uint8_t g_RxBuf1[UART1_RX_BUF_SIZE]; //接收缓冲区
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#endif
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#if UART2_FIFO_EN == 1
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static UART_T g_tUART2;
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static uint8_t g_TxBuf2[UART2_TX_BUF_SIZE]; //发送缓冲区
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static uint8_t g_RxBuf2[UART2_RX_BUF_SIZE]; //接收缓冲区
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#endif
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static void UART_Var_Init(void);
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static void UART_Hard_Init(void);
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static void UART_T_Send(UART_T *_pUART, uint8_t *_ucaBuf, uint16_t _usLen);
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static uint8_t UART_T_GetChar(UART_T *_pUART, uint8_t *_pByte);
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static void UART_T_IRQ(UART_T *_pUART);
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/**
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* @brief 初始化串口
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*/
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void UART_Init(void)
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{
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UART_Var_Init(); //初始化全局变量
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UART_Hard_Init(); //配置串口的硬件参数
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}
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/**
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* @brief 将 COM 端口号转换为 UART 指针
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* @param _ucPort: 端口号 (COM1-2)
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* @retval UART 指针
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*/
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UART_T *ComToUART(COM_PORT_E _ucPort)
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{
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if (_ucPort == COM1)
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{
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#if UART1_FIFO_EN == 1
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return &g_tUART1;
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#else
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return 0;
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#endif
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}
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else if (_ucPort == COM2)
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{
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#if UART2_FIFO_EN == 1
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return &g_tUART2;
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#else
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return 0;
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#endif
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}
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else
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{
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return 0;
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}
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}
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/**
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* @brief 将 COM 端口号转换为 USART_TypeDef*
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* @param _ucPort: 端口号 (COM1-2)
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* @retval USART_TypeDef*
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*/
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USART_TypeDef *ComToUSARTx(COM_PORT_E _ucPort)
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{
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if (_ucPort == COM1)
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{
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#if UART1_FIFO_EN == 1
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return USART1;
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#else
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return 0;
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#endif
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}
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else if (_ucPort == COM2)
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{
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#if UART2_FIFO_EN == 1
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return USART2;
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#else
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return 0;
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#endif
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}
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else
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{
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return 0;
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}
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}
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/**
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* @brief 向串口发送一组数据。数据放到发送缓冲区后立即返回，由中断服务程序在后台完成发送
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* @param _ucPort: 端口号 (COM1-2)
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* @param _ucaBuf: 待发送的数据缓冲区
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* @param _usLen : 数据长度
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*/
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void UART_SendBuff(COM_PORT_E _ucPort, uint8_t *_ucaBuf, uint16_t _usLen)
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{
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UART_T *pUART;
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pUART = ComToUART(_ucPort);
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if (pUART == 0)
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{
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return;
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}
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UART_T_Send(pUART, _ucaBuf, _usLen);
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}
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/**
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* @brief 向串口发送 1 个字节。数据放到发送缓冲区后立即返回，由中断服务程序在后台完成发送
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* @param _ucPort: 端口号 (COM1-2)
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* @param _ucByte: 待发送的数据
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*/
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void UART_SendChar(COM_PORT_E _ucPort, uint8_t _ucByte)
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{
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UART_SendBuff(_ucPort, &_ucByte, 1);
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}
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/**
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* @brief 从接收缓冲区读取 1 字节，非阻塞。无论有无数据均立即返回
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* @param _ucPort: 端口号 (COM1-2)
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* @param _pByte: 接收到的数据指针
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* @retval 0 表示无数据，1 表示读取到有效字节
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*/
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uint8_t UART_GetChar(COM_PORT_E _ucPort, uint8_t *_pByte)
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{
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UART_T *pUART;
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pUART = ComToUART(_ucPort);
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if (pUART == 0)
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{
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return 0;
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}
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return UART_T_GetChar(pUART, _pByte);
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}
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/**
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* @brief 从接收缓冲区读取到特定字节，阻塞，有超时
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* @param _ucPort: 端口号 (COM1-2)
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* @param _pBuf: 接收到的数据指针
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* @param _endByte: 终止字节
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* @param _timeout: 超时时间
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* @retval 0 表示超时，1 表示成功
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*/
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uint8_t UART_GetBuffUntil(COM_PORT_E _ucPort, uint8_t *_pBuf, uint8_t _endByte, uint16_t _timeout)
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{
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uint8_t ch;
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int32_t start_t = SysTick_GetRunTime();
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uint16_t i = 0;
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while (1)
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{
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if (UART_GetChar(_ucPort, &ch) == 1)
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{
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if (ch == _endByte)
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{
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_pBuf[i] = '\0';
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return 1;
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}
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_pBuf[i++] = ch;
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}
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else if (SysTick_GetRunTime() - start_t > _timeout)
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{
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return 0;
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}
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}
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}
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/**
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* @brief 清零串口发送缓冲区
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* @param _ucPort: 端口号 (COM1-2)
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*/
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void UART_ClearTxFIFO(COM_PORT_E _ucPort)
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{
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UART_T *pUART;
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pUART = ComToUART(_ucPort);
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if (pUART == 0)
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{
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return;
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}
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pUART->usTxWrite = 0;
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pUART->usTxRead = 0;
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pUART->usTxCount = 0;
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}
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/**
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* @brief 清零串口接收缓冲区
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* @param _ucPort: 端口号 (COM1-2)
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*/
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void UART_ClearRxFIFO(COM_PORT_E _ucPort)
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{
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UART_T *pUART;
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pUART = ComToUART(_ucPort);
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if (pUART == 0)
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{
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return;
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}
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pUART->usRxWrite = 0;
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pUART->usRxRead = 0;
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pUART->usRxCount = 0;
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}
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/**
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* @brief 设置串口的波特率。无校验，收发都使能
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* @param _ucPort: 端口号 (COM1-2)
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* @param _BaudRate: 波特率
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*/
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void UART_SetBaud(COM_PORT_E _ucPort, uint32_t _BaudRate)
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{
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USART_TypeDef *USARTx;
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USARTx = ComToUSARTx(_ucPort);
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if (USARTx == 0)
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{
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return;
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}
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UART_SetUARTParam(USARTx, _BaudRate, UART_PARITY_NONE, UART_MODE_TX_RX);
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}
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/**
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* @brief 设置串口接受中断处理函数
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* @param _ucPort: 端口号 (COM1-2)
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* @param Receive: 中断处理函数
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*/
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void UART_BindReceiveHandle(COM_PORT_E _ucPort, UARTReceiveHandler Receive)
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{
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UART_T *pUART;
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pUART = ComToUART(_ucPort);
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if (pUART == 0)
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{
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return;
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}
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pUART->Receive = Receive;
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}
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/**
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* @brief 初始化串口相关的变量
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*/
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static void UART_Var_Init(void)
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{
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#if UART1_FIFO_EN == 1
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g_tUART1.uart = USART1; //串口设备
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g_tUART1.pTxBuf = g_TxBuf1; //发送缓冲区指针
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g_tUART1.pRxBuf = g_RxBuf1; //接收缓冲区指针
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g_tUART1.usTxBufSize = UART1_TX_BUF_SIZE; //发送缓冲区大小
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g_tUART1.usRxBufSize = UART1_RX_BUF_SIZE; //接收缓冲区大小
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g_tUART1.usTxWrite = 0; //发送 FIFO 写索引
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g_tUART1.usTxRead = 0; //发送 FIFO 读索引
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g_tUART1.usRxWrite = 0; //接收 FIFO 写索引
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g_tUART1.usRxRead = 0; //接收 FIFO 读索引
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g_tUART1.usRxCount = 0; //接收到的新数据个数
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g_tUART1.usTxCount = 0; //待发送的数据个数
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g_tUART1.Receive = 0; //接收到新数据后的回调函数
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g_tUART1.Sending = 0; //正在发送中标志
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#endif
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#if UART2_FIFO_EN == 1
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g_tUART2.uart = USART2; //串口设备
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g_tUART2.pTxBuf = g_TxBuf2; //发送缓冲区指针
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g_tUART2.pRxBuf = g_RxBuf2; //接收缓冲区指针
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g_tUART2.usTxBufSize = UART2_TX_BUF_SIZE; //发送缓冲区大小
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g_tUART2.usRxBufSize = UART2_RX_BUF_SIZE; //接收缓冲区大小
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g_tUART2.usTxWrite = 0; //发送 FIFO 写索引
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g_tUART2.usTxRead = 0; //发送 FIFO 读索引
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g_tUART2.usRxWrite = 0; //接收 FIFO 写索引
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g_tUART2.usRxRead = 0; //接收 FIFO 读索引
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g_tUART2.usRxCount = 0; //接收到的新数据个数
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g_tUART2.usTxCount = 0; //待发送的数据个数
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g_tUART2.Receive = 0; //接收到新数据后的回调函数
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g_tUART2.Sending = 0; //正在发送中标志
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#endif
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}
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/**
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* @brief 配置串口的硬件参数
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* @param Instance: USART_TypeDef*
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* @param BaudRate: 波特率
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* @param Parity: 校验类型，奇校验或者偶校验
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* @param Mode: 发送和接收模式使能
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*/
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void UART_SetUARTParam(USART_TypeDef *Instance, uint32_t BaudRate, uint32_t Parity, uint32_t Mode)
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{
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UART_HandleTypeDef UARTHandle;
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UARTHandle.Instance = Instance;
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UARTHandle.Init.BaudRate = BaudRate;
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UARTHandle.Init.WordLength = UART_WORDLENGTH_8B;
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UARTHandle.Init.StopBits = UART_STOPBITS_1;
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UARTHandle.Init.Parity = Parity;
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UARTHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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UARTHandle.Init.Mode = Mode;
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UARTHandle.Init.OverSampling = UART_OVERSAMPLING_16;
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HAL_UART_Init(&UARTHandle);
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}
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/**
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* @brief 配置串口的硬件参数
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*/
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static void UART_Hard_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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#if UART1_FIFO_EN == 1
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USART1_TX_GPIO_CLK_ENABLE();
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USART1_RX_GPIO_CLK_ENABLE();
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USART1_CLK_ENABLE();
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GPIO_InitStruct.Pin = USART1_TX_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(USART1_TX_GPIO_PORT, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = USART1_RX_PIN;
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HAL_GPIO_Init(USART1_RX_GPIO_PORT, &GPIO_InitStruct);
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//配置NVIC the NVIC for UART
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HAL_NVIC_SetPriority(USART1_IRQn, 0, 1);
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HAL_NVIC_EnableIRQ(USART1_IRQn);
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//配置波特率、奇偶校验
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UART_SetUARTParam(USART1, UART1_BAUD, UART_PARITY_NONE, UART_MODE_TX_RX);
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CLEAR_BIT(USART1->SR, USART_SR_TC); //清除 TC 发送完成标志
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CLEAR_BIT(USART1->SR, USART_SR_RXNE); //清除 RXNE 接收标志
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SET_BIT(USART1->CR1, USART_CR1_RXNEIE); //使能 PE RX 接受中断
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#endif
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#if UART2_FIFO_EN == 1
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USART2_TX_GPIO_CLK_ENABLE();
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USART2_RX_GPIO_CLK_ENABLE();
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USART2_CLK_ENABLE();
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GPIO_InitStruct.Pin = USART2_TX_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(USART2_TX_GPIO_PORT, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = USART2_RX_PIN;
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HAL_GPIO_Init(USART2_RX_GPIO_PORT, &GPIO_InitStruct);
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HAL_NVIC_SetPriority(USART2_IRQn, 0, 2);
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HAL_NVIC_EnableIRQ(USART2_IRQn);
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UART_SetUARTParam(USART2, UART2_BAUD, UART_PARITY_NONE, UART_MODE_TX_RX);
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CLEAR_BIT(USART2->SR, USART_SR_TC); //清除 TC 发送完成标志
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CLEAR_BIT(USART2->SR, USART_SR_RXNE); //清除 RXNE 接收标志
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SET_BIT(USART2->CR1, USART_CR1_RXNEIE); //使能 PE RX 接受中断
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#endif
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}
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/**
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* @brief 填写数据到 UART 发送缓冲区，并启动发送中断。中断处理函数发送完毕后，自动关闭发送中断
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* @param _pUART
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* @param _ucaBuf
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* @param _usLen
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*/
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static void UART_T_Send(UART_T *_pUART, uint8_t *_ucaBuf, uint16_t _usLen)
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{
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uint16_t i;
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for (i = 0; i < _usLen; i++)
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{
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//如果发送缓冲区已经满了，则等待缓冲区空
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while (1)
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{
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__IO uint16_t usCount;
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DISABLE_INT();
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usCount = _pUART->usTxCount;
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ENABLE_INT();
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if (usCount < _pUART->usTxBufSize)
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{
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break;
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}
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else if (usCount == _pUART->usTxBufSize) //数据已填满缓冲区
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{
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if ((_pUART->uart->CR1 & USART_CR1_TXEIE) == 0)
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{
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SET_BIT(_pUART->uart->CR1, USART_CR1_TXEIE);
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}
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}
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}
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//将新数据填入发送缓冲区
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_pUART->pTxBuf[_pUART->usTxWrite] = _ucaBuf[i];
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DISABLE_INT();
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if (++_pUART->usTxWrite >= _pUART->usTxBufSize)
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{
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_pUART->usTxWrite = 0;
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}
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_pUART->usTxCount++;
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ENABLE_INT();
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}
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SET_BIT(_pUART->uart->CR1, USART_CR1_TXEIE); //使能发送中断（缓冲区空）
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}
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/**
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* @brief 填写数据到 UART 发送缓冲区，并启动发送中断。中断处理函数发送完毕后，自动关闭发送中断
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* @param _pUART
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* @param _pByte
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* @retval 成功返回 1，失败返回 0
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*/
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static uint8_t UART_T_GetChar(UART_T *_pUART, uint8_t *_pByte)
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{
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uint16_t usCount;
|
||
|
||
DISABLE_INT();
|
||
usCount = _pUART->usRxCount;
|
||
ENABLE_INT();
|
||
|
||
//如果读和写索引相同，则返回 0
|
||
if (usCount == 0)
|
||
{
|
||
return 0;
|
||
}
|
||
else
|
||
{
|
||
*_pByte = _pUART->pRxBuf[_pUART->usRxRead]; //从串口接收 FIFO 取 1 个数据
|
||
|
||
//改写 FIFO 读索引
|
||
DISABLE_INT();
|
||
if (++_pUART->usRxRead >= _pUART->usRxBufSize)
|
||
{
|
||
_pUART->usRxRead = 0;
|
||
}
|
||
_pUART->usRxCount--;
|
||
ENABLE_INT();
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @brief 判断发送缓冲区是否为空
|
||
* @param _ucPort
|
||
* @retval 1 为空，0 为不空
|
||
*/
|
||
uint8_t UART_IsTxEmpty(COM_PORT_E _ucPort)
|
||
{
|
||
UART_T *pUART;
|
||
uint8_t Sending;
|
||
|
||
pUART = ComToUART(_ucPort);
|
||
if (pUART == 0)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
Sending = pUART->Sending;
|
||
|
||
if (Sending != 0)
|
||
{
|
||
return 0;
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
/**
|
||
* @brief 供中断服务程序调用，通用串口中断处理函数
|
||
* @param _pUART
|
||
*/
|
||
static void UART_T_IRQ(UART_T *_pUART)
|
||
{
|
||
uint32_t isrflags = READ_REG(_pUART->uart->SR);
|
||
uint32_t cr1its = READ_REG(_pUART->uart->CR1);
|
||
uint32_t cr3its = READ_REG(_pUART->uart->CR3);
|
||
|
||
//处理接收中断
|
||
if ((isrflags & USART_SR_RXNE) != RESET)
|
||
{
|
||
uint8_t ch;
|
||
|
||
//从串口接收数据寄存器读取数据存放到接收 FIFO
|
||
ch = READ_REG(_pUART->uart->DR);
|
||
_pUART->pRxBuf[_pUART->usRxWrite] = ch;
|
||
if (++_pUART->usRxWrite >= _pUART->usRxBufSize)
|
||
{
|
||
_pUART->usRxWrite = 0;
|
||
}
|
||
if (_pUART->usRxCount < _pUART->usRxBufSize)
|
||
{
|
||
_pUART->usRxCount++;
|
||
}
|
||
|
||
//回调函数
|
||
if (_pUART->Receive)
|
||
{
|
||
_pUART->Receive(ch);
|
||
}
|
||
}
|
||
|
||
//处理发送缓冲区空中断
|
||
if (((isrflags & USART_SR_TXE) != RESET) && (cr1its & USART_CR1_TXEIE) != RESET)
|
||
{
|
||
if (_pUART->usTxCount == 0)
|
||
{
|
||
//发送缓冲区的数据已取完时，禁止发送缓冲区空中断（注意：此时最后1个数据还未真正发送完毕）
|
||
CLEAR_BIT(_pUART->uart->CR1, USART_CR1_TXEIE);
|
||
|
||
//使能数据发送完毕中断
|
||
SET_BIT(_pUART->uart->CR1, USART_CR1_TCIE);
|
||
}
|
||
else
|
||
{
|
||
_pUART->Sending = 1;
|
||
|
||
//从发送 FIFO 取 1 个字节写入串口发送数据寄存器
|
||
_pUART->uart->DR = _pUART->pTxBuf[_pUART->usTxRead];
|
||
if (++_pUART->usTxRead >= _pUART->usTxBufSize)
|
||
{
|
||
_pUART->usTxRead = 0;
|
||
}
|
||
_pUART->usTxCount--;
|
||
}
|
||
}
|
||
//数据bit位全部发送完毕的中断
|
||
if (((isrflags & USART_SR_TC) != RESET) && ((cr1its & USART_CR1_TCIE) != RESET))
|
||
{
|
||
if (_pUART->usTxCount == 0)
|
||
{
|
||
//如果发送 FIFO 的数据全部发送完毕，禁止数据发送完毕中断
|
||
CLEAR_BIT(_pUART->uart->CR1, USART_CR1_TCIE);
|
||
_pUART->Sending = 0;
|
||
}
|
||
else
|
||
{
|
||
//正常情况下，不会进入此分支
|
||
//如果发送 FIFO 的数据还未完毕，则从发送 FIFO 取 1 个数据写入发送数据寄存器
|
||
_pUART->uart->DR = _pUART->pTxBuf[_pUART->usTxRead];
|
||
if (++_pUART->usTxRead >= _pUART->usTxBufSize)
|
||
{
|
||
_pUART->usTxRead = 0;
|
||
}
|
||
_pUART->usTxCount--;
|
||
}
|
||
}
|
||
}
|
||
|
||
#if UART1_FIFO_EN == 1
|
||
void USART1_IRQHandler(void)
|
||
{
|
||
UART_T_IRQ(&g_tUART1);
|
||
}
|
||
#endif
|
||
|
||
#if UART2_FIFO_EN == 1
|
||
void USART2_IRQHandler(void)
|
||
{
|
||
UART_T_IRQ(&g_tUART2);
|
||
}
|
||
#endif
|
||
|
||
void UART_SetprintfCom(COM_PORT_E _ucPort)
|
||
{
|
||
printf_Com = _ucPort;
|
||
}
|
||
|
||
void UART_SetgetcharCom(COM_PORT_E _ucPort)
|
||
{
|
||
getchar_Com = _ucPort;
|
||
}
|
||
|
||
//重定义 fputc 函数，用于 printf
|
||
int fputc(int ch, FILE *f)
|
||
{
|
||
UART_SendChar(printf_Com, ch);
|
||
|
||
return ch;
|
||
}
|
||
|
||
//重定义 fgetc 函数，用于 getchar
|
||
int fgetc(FILE *f)
|
||
{
|
||
uint8_t ucData;
|
||
|
||
while (UART_GetChar(getchar_Com, &ucData) == 0)
|
||
;
|
||
|
||
return ucData;
|
||
}
|