STM32与labview 2019 组成的测控系统

1万 · 2019-9-4 16:35

1万 · 2019-9-4 16:35

1万 · 2019-9-4 16:36

1万 · 2019-9-4 16:36

1万 · 2019-9-4 16:37

下载freemodbus源码如上图所示，添加进去到你的工程里面！

1万 · 2019-9-4 16:37

// 串口1-USART1

#define  DEBUG_USARTx                USART1
#define  DEBUG_USART_CLK             RCC_APB2Periph_USART1
#define  DEBUG_USART_APBxClkCmd       RCC_APB2PeriphClockCmd
#define  DEBUG_USART_BAUDRATE          115200

// USART GPIO 引脚宏定义
#define  DEBUG_USART_GPIO_CLK          (RCC_APB2Periph_GPIOA)
#define  DEBUG_USART_GPIO_APBxClkCmd RCC_APB2PeriphClockCmd

#define  DEBUG_USART_TX_GPIO_PORT       GPIOA
#define  DEBUG_USART_TX_GPIO_PIN       GPIO_Pin_9
#define  DEBUG_USART_RX_GPIO_PORT    GPIOA
#define  DEBUG_USART_RX_GPIO_PIN       GPIO_Pin_10

#define  DEBUG_USART_IRQ             USART1_IRQn
#define  DEBUG_USART_IRQHandler       USART1_IRQHandler

#define  MODBUS_USARTx                USART1
#define  MODBUS_USART_CLK             RCC_APB2Periph_USART1
#define  MODBUS_USART_APBxClkCmd       RCC_APB2PeriphClockCmd
#define  MODBUS_USART_BAUDRATE          115200

// USART GPIO 引脚宏定义
#define  MODBUS_USART_GPIO_CLK          (RCC_APB2Periph_GPIOA)
#define  MODBUS_USART_GPIO_APBxClkCmd RCC_APB2PeriphClockCmd

#define  MODBUS_USART_TX_GPIO_PORT       GPIOA
#define  MODBUS_USART_TX_GPIO_PIN       GPIO_Pin_9
#define  MODBUS_USART_RX_GPIO_PORT    GPIOA
#define  MODBUS_USART_RX_GPIO_PIN       GPIO_Pin_10

#define  MODBUS_USART_IRQ             USART1_IRQn
#define  MODBUS_USART_IRQHandler       USART1_IRQHandler

1万 · 2019-9-4 16:37

在这里使用串口1 ----PA9 -PA10

1万 · 2019-9-4 16:38

改动后三个文件！

1万 · 2019-9-4 16:38

BOOL
xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
{
GPIO_InitTypeDef  GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef  NVIC_InitStructure;

(void)ucPORT;  //不修改串口号
(void)ucDataBits;  //不修改数据位长度
(void)eParity;  //不修改检验格式

// 打开串口GPIO的时钟
MODBUS_USART_GPIO_APBxClkCmd(MODBUS_USART_GPIO_CLK, ENABLE);
// 打开串口外设的时钟
MODBUS_USART_APBxClkCmd(MODBUS_USART_CLK, ENABLE);

// 将USART Tx的GPIO配置为推挽复用模式
GPIO_InitStructure.GPIO_Pin = MODBUS_USART_TX_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(MODBUS_USART_TX_GPIO_PORT, &GPIO_InitStructure);

// 将USART Rx的GPIO配置为浮空输入模式
GPIO_InitStructure.GPIO_Pin = MODBUS_USART_RX_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(MODBUS_USART_RX_GPIO_PORT, &GPIO_InitStructure);

// 配置串口的工作参数
// 配置波特率
USART_InitStructure.USART_BaudRate = ulBaudRate;
// 配置针数据字长
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
// 配置停止位
USART_InitStructure.USART_StopBits = USART_StopBits_1;
// 配置校验位
USART_InitStructure.USART_Parity = USART_Parity_No ;
// 配置硬件流控制
USART_InitStructure.USART_HardwareFlowControl =USART_HardwareFlowControl_None;
// 配置工作模式，收发一起
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
// 完成串口的初始化配置
USART_Init(MODBUS_USARTx, &USART_InitStructure);

// 串口中断优先级配置
/* 嵌套向量中断控制器组选择 */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
/* 配置USART为中断源 */
NVIC_InitStructure.NVIC_IRQChannel = MODBUS_USART_IRQ;
/* 抢断优先级*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
/* 子优先级 */
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
/* 使能中断 */
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
/* 初始化配置NVIC */
NVIC_Init(&NVIC_InitStructure);

// 使能串口
USART_Cmd(MODBUS_USARTx, ENABLE);

return TRUE;
}

1万 · 2019-9-4 16:38

串口的一个定义！这里，网上的移植方法与教程也是多的很！随便看一看，百度一下，就可以找到！

1万 · 2019-9-4 16:39

/**
  *****************************************************************************
  * @name : 串口中断服务函数
  *
  * @brief  : none
  *
  * @Input  : none
  *
  * @output : none
  *
  * @return : none
  *****************************************************************************
**/
void  MODBUS_USART_IRQHandler(void)
{
if (USART_GetITStatus(MODBUS_USARTx, USART_IT_RXNE) == SET)  //接收中断
{
      prvvUARTRxISR();
      USART_ClearITPendingBit(MODBUS_USARTx, USART_IT_RXNE);
}

if (USART_GetITStatus(MODBUS_USARTx, USART_IT_TXE) == SET)  //发送中断
{
      prvvUARTTxReadyISR();
      USART_ClearITPendingBit(MODBUS_USARTx, USART_IT_TXE);
}
}

1万 · 2019-9-4 16:39

串口的中断函数，写到这里，改成上面的模式！

1万 · 2019-9-4 16:39

修改完串口，修改一下定时器！

1万 · 2019-9-4 16:39

/* ----------------------- Start implementation -----------------------------*/
BOOL
xMBPortTimersInit( USHORT usTim1Timerout50us )
{
// return FALSE;

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef       NVIC_InitStructure;

uint16_t PrescalerValue = 0;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

//
//HCLK为72MHz
//时基频率72 / （1 + Prescaler) = 20KHz
//
PrescalerValue = (uint16_t)((SystemCoreClock / 20000) - 1);
//
//初始化定时器参数
//
TIM_TimeBaseStructure.TIM_Period = (uint16_t)usTim1Timerout50us;
TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
//
//使能预装
//
TIM_ARRPreloadConfig(TIM2, ENABLE);

//
//初始化中断优先级
//
NVIC_InitStructure.NVIC_IRQChannel                = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority       = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd             = ENABLE;
NVIC_Init(&NVIC_InitStructure);

TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_ITConfig(TIM2, TIM_IT_Update, DISABLE);
TIM_Cmd(TIM2, DISABLE);

return TRUE;
}

1万 · 2019-9-4 16:40

void
vMBPortTimersEnable( )
{
/* Enable the timer with the timeout passed to xMBPortTimersInit( ) */

TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
TIM_SetCounter(TIM2, 0x00000000);
TIM_Cmd(TIM2, ENABLE);
}

void
vMBPortTimersDisable( )
{
/* Disable any pending timers. */

TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_ITConfig(TIM2, TIM_IT_Update, DISABLE);
TIM_SetCounter(TIM2, 0x00000000);
TIM_Cmd(TIM2, DISABLE);
}

1万 · 2019-9-4 16:40

void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
prvvTIMERExpiredISR();
}
}

1万 · 2019-9-4 16:40

定时器修改完毕！

1万 · 2019-9-4 16:40

/* ----------------------- Variables ---------------------------------*/
//Slave mode use these variables
//开关输入状态
USHORT usSDiscInStart                            = S_DISCRETE_INPUT_START;
UCHAR ucSDiscInBuf[S_DISCRETE_INPUT_NDISCRETES/8];
//线圈状态
USHORT usSCoilStart                            = S_COIL_START;
UCHAR ucSCoilBuf[S_COIL_NCOILS/8]             ;
//输入寄存器内容
USHORT usSRegInStart                            = S_REG_INPUT_START;
USHORT usSRegInBuf[S_REG_INPUT_NREGS]          ;
//保持寄存器内容
USHORT usSRegHoldStart                         = S_REG_HOLDING_START;
USHORT usSRegHoldBuf[S_REG_HOLDING_NREGS]       ;

1万 · 2019-9-4 16:40

修改 mb_app.c的内容！

1万 · 2019-9-4 16:40

/* -----------------------Slave Defines -------------------------------------*/
#define S_DISCRETE_INPUT_START       1
#define S_DISCRETE_INPUT_NDISCRETES 255
#define S_COIL_START                1
#define S_COIL_NCOILS                255
#define S_REG_INPUT_START          1
#define S_REG_INPUT_NREGS          255
#define S_REG_HOLDING_START          1
#define S_REG_HOLDING_NREGS          255