FreeModbus移植到STM32F103（串行传输方式）

1.创建工程

2.将FreeModbus源码，拷贝到工程目录

3.将FreeModbus文件添加进工程

添加好之后，编译出现错误

4.移植底层接口

先看第一个错误，缺少port.h

借鉴AVR架构的程序，将demo里面AVR中的port文件夹，拷贝到工程中

进入port文件夹，删除重复文件，mbcrc.c

添加好之后，重新编译，出现错误，port.h中包含了很多iar相关代码

将这些代码删除或修改

重新编译，错误少了很多，剩下的错误是，portserial和porttimer中包含avr相关代码

将portserial和porttimer中，串口和定时器的驱动，改成STM32架构的代码

#include "port.h"/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"/* GPIO配置 */
static void gpio_config(void)
{GPIO_InitTypeDef GPIO_InitStructure;/* 使能GPIOA时钟 */RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);/* 设置PA2为复用推挽输出 */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  GPIO_Init(GPIOA, &GPIO_InitStructure); /* 设置PA3为浮空输入 */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;  GPIO_Init(GPIOA, &GPIO_InitStructure);
}/* 中断配置 */
static void nvic_config(void)
{NVIC_InitTypeDef NVIC_InitStructure;/* 设置串口1中断的先占优先级为2,从占优先级为2 */NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);
}/* 串口配置 */
static void usart_config(uint32_t baudRate, uint16_t wordLength, uint16_t parity)
{USART_InitTypeDef USART_InitStruct;    /* 使能GPIOA时钟和串口时钟 */RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);/* 设置串口波特率115200、数据位8bit、停止位1bit、校验位无、无硬件流、接收发送 */if(wordLength == 9)USART_InitStruct.USART_WordLength = USART_WordLength_9b;elseUSART_InitStruct.USART_WordLength = USART_WordLength_8b;if(MB_PAR_NONE != parity)USART_InitStruct.USART_StopBits = USART_StopBits_1;elseUSART_InitStruct.USART_StopBits = USART_StopBits_2;if(MB_PAR_NONE == parity)USART_InitStruct.USART_Parity = USART_Parity_No;else if(MB_PAR_EVEN == parity)USART_InitStruct.USART_Parity = USART_Parity_Even;elseUSART_InitStruct.USART_Parity = USART_Parity_Odd;USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;USART_Init(USART1, &USART_InitStruct);
}void vMBPortSerialEnable(BOOL xRxEnable, BOOL xTxEnable)
{if(xRxEnable == FALSE && xTxEnable == FALSE)USART_Cmd(USART1, DISABLE);elseUSART_Cmd(USART1, ENABLE);if(xRxEnable == TRUE){USART_ClearITPendingBit(USART1, USART_IT_RXNE);USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);}elseUSART_ITConfig(USART1, USART_IT_RXNE, DISABLE);if(xTxEnable == TRUE){USART_ClearITPendingBit(USART1, USART_IT_TC);USART_ITConfig(USART1, USART_IT_TC, ENABLE);pxMBFrameCBTransmitterEmpty();}elseUSART_ITConfig(USART1, USART_IT_TC, DISABLE);
}BOOL xMBPortSerialInit(UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity)
{(void)ucPORT;/* 串口配置 */usart_config(ulBaudRate, ucDataBits, eParity);  /* GPIO配置 */gpio_config();/* 中断配置 */nvic_config();vMBPortSerialEnable(FALSE, FALSE);return TRUE;
}BOOL xMBPortSerialPutByte(CHAR ucByte)
{   USART_SendData(USART1, ucByte);return TRUE;
}BOOL xMBPortSerialGetByte(CHAR *pucByte)
{*pucByte = USART_ReceiveData(USART1);return TRUE;
}void USART1_IRQHandler(void)
{  if(USART_GetITStatus(USART1, USART_IT_ORE) != RESET){  USART_ClearITPendingBit(USART1, USART_IT_ORE);pxMBFrameCBByteReceived();}  if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET){  USART_ClearITPendingBit(USART1, USART_IT_RXNE);pxMBFrameCBByteReceived();}  if(USART_GetITStatus(USART1, USART_IT_TC) != RESET){ USART_ClearITPendingBit(USART1, USART_IT_TC);pxMBFrameCBTransmitterEmpty();}
}

/* ----------------------- Platform includes --------------------------------*/
#include "port.h"/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"/* 功能:     定时器配置参数:        period 自动重载值返回值:    无   */
static void timer_config(uint16_t period)
{TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;/* 允许TIM3的时钟 */RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);/* 将定时器3寄存器设为初始值 */TIM_DeInit(TIM3);/* 设置定时器3由内部时钟 */TIM_InternalClockConfig(TIM3);/* 预分频值 */TIM_TimeBaseStructure.TIM_Prescaler = 3600 - 1;/* 时钟分割 */TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;/* 向上计数 */TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;/* 自动重载值 */TIM_TimeBaseStructure.TIM_Period = period - 1;/* 初始化定时器3 */TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);/* 清除溢出中断标志 */TIM_ClearFlag(TIM3, TIM_FLAG_Update);/* 禁止ARR预装载缓冲器 */TIM_ARRPreloadConfig(TIM3, DISABLE);
}/* 功能:     中断配置参数:     无返回值:   无   */
static void nvic_config(void)
{NVIC_InitTypeDef NVIC_InitStructure;/* 选择TIM3的中断通道 */NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;/* 抢占式中断优先级设置为2 */NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;/* 响应式中断优先级设置为2 */NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;/* 使能中断 */NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/* 中断初始化 */NVIC_Init(&NVIC_InitStructure);
}BOOL xMBPortTimersInit(USHORT usTim1Timerout50us)
{/* 设置定时器定时时间 */timer_config(usTim1Timerout50us);/* 中断配置 */nvic_config();return TRUE;
}void vMBPortTimersEnable(void)
{/* 清空定时器3计数器 */TIM_SetCounter(TIM3, 0);/* 使能定时器3 */TIM_Cmd(TIM3, ENABLE);/* 使能TIM3的中断 */TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
}void vMBPortTimersDisable(void)
{/* 禁止定时器3 */TIM_Cmd(TIM3, DISABLE);/* 关闭TIM3的中断 */TIM_ITConfig(TIM3, TIM_IT_Update, DISABLE);
}/* 定时器3中断向量 */
void TIM3_IRQHandler(void)
{/* 定时器3溢出标志位 */if(TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET){/* 定时器3清除溢出标志位 */TIM_ClearITPendingBit(TIM3 , TIM_FLAG_Update);/* 关闭TIM3的中断 */TIM_ITConfig(TIM3, TIM_IT_Update, DISABLE);/* 关闭定时器3 */TIM_Cmd(TIM3, DISABLE);(void)pxMBPortCBTimerExpired();}
}

重新编译，驱动相关的错误，已经不存在。

报告eMBRegCoilsCB、eMBRegDiscreteCB、eMBRegHoldingCB和eMBRegInputCB没有定义。

这四个接口是协议栈预留给用户自己去实现的，分别创建user_mb_app.h和user_mb_app.c两个文件

#ifndef _USER_MB_APP_H_
#define _USER_MB_APP_H_/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbconfig.h"
#include "mbframe.h"
#include "mbutils.h"/* -----------------------Slave Defines -------------------------------------*/
#define S_DISCRETE_INPUT_START        0
#define S_DISCRETE_INPUT_NDISCRETES   16
#define S_COIL_START                  0
#define S_COIL_NCOILS                 64
#define S_REG_INPUT_START             0
#define S_REG_INPUT_NREGS             100
#define S_REG_HOLDING_START           0
#define S_REG_HOLDING_NREGS           100
/* salve mode: holding register's all address */
#define          S_HD_RESERVE                     0
#define          S_HD_CPU_USAGE_MAJOR             1
#define          S_HD_CPU_USAGE_MINOR             2
/* salve mode: input register's all address */
#define          S_IN_RESERVE                     0
/* salve mode: coil's all address */
#define          S_CO_RESERVE                     0
/* salve mode: discrete's all address */
#define          S_DI_RESERVE                     0/* -----------------------Master Defines -------------------------------------*/
#define M_DISCRETE_INPUT_START        0
#define M_DISCRETE_INPUT_NDISCRETES   16
#define M_COIL_START                  0
#define M_COIL_NCOILS                 64
#define M_REG_INPUT_START             0
#define M_REG_INPUT_NREGS             100
#define M_REG_HOLDING_START           0
#define M_REG_HOLDING_NREGS           100
/* master mode: holding register's all address */
#define          M_HD_RESERVE                     0
/* master mode: input register's all address */
#define          M_IN_RESERVE                     0
/* master mode: coil's all address */
#define          M_CO_RESERVE                     0
/* master mode: discrete's all address */
#define          M_DI_RESERVE                     0#endif

/** FreeModbus Libary: user callback functions and buffer define in slave mode* Copyright (C) 2013 Armink <armink.ztl@gmail.com>** This library is free software; you can redistribute it and/or* modify it under the terms of the GNU Lesser General Public* License as published by the Free Software Foundation; either* version 2.1 of the License, or (at your option) any later version.** This library is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU* Lesser General Public License for more details.** You should have received a copy of the GNU Lesser General Public* License along with this library; if not, write to the Free Software* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA** File: $Id: user_mb_app.c,v 1.60 2013/11/23 11:49:05 Armink $*/
#include "user_mb_app.h"/*------------------------Slave mode use these variables----------------------*/
//Slave mode:DiscreteInputs variables
USHORT   usSDiscInStart                               = S_DISCRETE_INPUT_START;
#if S_DISCRETE_INPUT_NDISCRETES%8
UCHAR    ucSDiscInBuf[S_DISCRETE_INPUT_NDISCRETES/8+1];
#else
UCHAR    ucSDiscInBuf[S_DISCRETE_INPUT_NDISCRETES/8]  ;
#endif
//Slave mode:Coils variables
USHORT   usSCoilStart                                 = S_COIL_START;
#if S_COIL_NCOILS%8
UCHAR    ucSCoilBuf[S_COIL_NCOILS/8+1]                ;
#else
UCHAR    ucSCoilBuf[S_COIL_NCOILS/8]                  ;
#endif
//Slave mode:InputRegister variables
USHORT   usSRegInStart                                = S_REG_INPUT_START;
USHORT   usSRegInBuf[S_REG_INPUT_NREGS]               ;
//Slave mode:HoldingRegister variables
USHORT   usSRegHoldStart                              = S_REG_HOLDING_START;
USHORT   usSRegHoldBuf[S_REG_HOLDING_NREGS]           ;/*** Modbus slave input register callback function.** @param pucRegBuffer input register buffer* @param usAddress input register address* @param usNRegs input register number** @return result*/
eMBErrorCode eMBRegInputCB(UCHAR *pucRegBuffer, USHORT usAddress, USHORT usNRegs)
{eMBErrorCode    eStatus = MB_ENOERR;USHORT          iRegIndex;USHORT *        pusRegInputBuf;USHORT          REG_INPUT_START;USHORT          REG_INPUT_NREGS;USHORT          usRegInStart;pusRegInputBuf = usSRegInBuf;REG_INPUT_START = S_REG_INPUT_START;REG_INPUT_NREGS = S_REG_INPUT_NREGS;usRegInStart = usSRegInStart;/* it already plus one in modbus function method. */usAddress--;if ((usAddress >= REG_INPUT_START)&& (usAddress + usNRegs <= REG_INPUT_START + REG_INPUT_NREGS)){iRegIndex = usAddress - usRegInStart;while (usNRegs > 0){*pucRegBuffer++ = (UCHAR) (pusRegInputBuf[iRegIndex] >> 8);*pucRegBuffer++ = (UCHAR) (pusRegInputBuf[iRegIndex] & 0xFF);iRegIndex++;usNRegs--;}}else{eStatus = MB_ENOREG;}return eStatus;
}/*** Modbus slave holding register callback function.** @param pucRegBuffer holding register buffer* @param usAddress holding register address* @param usNRegs holding register number* @param eMode read or write** @return result*/
eMBErrorCode eMBRegHoldingCB(UCHAR *pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode)
{eMBErrorCode    eStatus = MB_ENOERR;USHORT          iRegIndex;USHORT *        pusRegHoldingBuf;USHORT          REG_HOLDING_START;USHORT          REG_HOLDING_NREGS;USHORT          usRegHoldStart;pusRegHoldingBuf = usSRegHoldBuf;REG_HOLDING_START = S_REG_HOLDING_START;REG_HOLDING_NREGS = S_REG_HOLDING_NREGS;usRegHoldStart = usSRegHoldStart;/* it already plus one in modbus function method. */usAddress--;if ((usAddress >= REG_HOLDING_START)&& (usAddress + usNRegs <= REG_HOLDING_START + REG_HOLDING_NREGS)){iRegIndex = usAddress - usRegHoldStart;switch (eMode){/* read current register values from the protocol stack. */case MB_REG_READ:while (usNRegs > 0){*pucRegBuffer++ = (UCHAR) (pusRegHoldingBuf[iRegIndex] >> 8);*pucRegBuffer++ = (UCHAR) (pusRegHoldingBuf[iRegIndex] & 0xFF);iRegIndex++;usNRegs--;}break;/* write current register values with new values from the protocol stack. */case MB_REG_WRITE:while (usNRegs > 0){pusRegHoldingBuf[iRegIndex] = *pucRegBuffer++ << 8;pusRegHoldingBuf[iRegIndex] |= *pucRegBuffer++;iRegIndex++;usNRegs--;}break;}}else{eStatus = MB_ENOREG;}return eStatus;
}/*** Modbus slave coils callback function.** @param pucRegBuffer coils buffer* @param usAddress coils address* @param usNCoils coils number* @param eMode read or write** @return result*/
eMBErrorCode eMBRegCoilsCB(UCHAR *pucRegBuffer, USHORT usAddress, USHORT usNCoils, eMBRegisterMode eMode)
{eMBErrorCode    eStatus = MB_ENOERR;USHORT          iRegIndex , iRegBitIndex , iNReg;UCHAR *         pucCoilBuf;USHORT          COIL_START;USHORT          COIL_NCOILS;USHORT          usCoilStart;iNReg =  usNCoils / 8 + 1;pucCoilBuf = ucSCoilBuf;COIL_START = S_COIL_START;COIL_NCOILS = S_COIL_NCOILS;usCoilStart = usSCoilStart;/* it already plus one in modbus function method. */usAddress--;if( ( usAddress >= COIL_START ) &&( usAddress + usNCoils <= COIL_START + COIL_NCOILS ) ){iRegIndex = (USHORT) (usAddress - usCoilStart) / 8;iRegBitIndex = (USHORT) (usAddress - usCoilStart) % 8;switch ( eMode ){/* read current coil values from the protocol stack. */case MB_REG_READ:while (iNReg > 0){*pucRegBuffer++ = xMBUtilGetBits(&pucCoilBuf[iRegIndex++],iRegBitIndex, 8);iNReg--;}pucRegBuffer--;/* last coils */usNCoils = usNCoils % 8;/* filling zero to high bit */*pucRegBuffer = *pucRegBuffer << (8 - usNCoils);*pucRegBuffer = *pucRegBuffer >> (8 - usNCoils);break;/* write current coil values with new values from the protocol stack. */case MB_REG_WRITE:while (iNReg > 1){xMBUtilSetBits(&pucCoilBuf[iRegIndex++], iRegBitIndex, 8,*pucRegBuffer++);iNReg--;}/* last coils */usNCoils = usNCoils % 8;/* xMBUtilSetBits has bug when ucNBits is zero */if (usNCoils != 0){xMBUtilSetBits(&pucCoilBuf[iRegIndex++], iRegBitIndex, usNCoils,*pucRegBuffer++);}break;}}else{eStatus = MB_ENOREG;}return eStatus;
}/*** Modbus slave discrete callback function.** @param pucRegBuffer discrete buffer* @param usAddress discrete address* @param usNDiscrete discrete number** @return result*/
eMBErrorCode eMBRegDiscreteCB(UCHAR *pucRegBuffer, USHORT usAddress, USHORT usNDiscrete)
{eMBErrorCode    eStatus = MB_ENOERR;USHORT          iRegIndex , iRegBitIndex , iNReg;UCHAR *         pucDiscreteInputBuf;USHORT          DISCRETE_INPUT_START;USHORT          DISCRETE_INPUT_NDISCRETES;USHORT          usDiscreteInputStart;iNReg =  usNDiscrete / 8 + 1;pucDiscreteInputBuf = ucSDiscInBuf;DISCRETE_INPUT_START = S_DISCRETE_INPUT_START;DISCRETE_INPUT_NDISCRETES = S_DISCRETE_INPUT_NDISCRETES;usDiscreteInputStart = usSDiscInStart;/* it already plus one in modbus function method. */usAddress--;if ((usAddress >= DISCRETE_INPUT_START)&& (usAddress + usNDiscrete    <= DISCRETE_INPUT_START + DISCRETE_INPUT_NDISCRETES)){iRegIndex = (USHORT) (usAddress - usDiscreteInputStart) / 8;iRegBitIndex = (USHORT) (usAddress - usDiscreteInputStart) % 8;while (iNReg > 0){*pucRegBuffer++ = xMBUtilGetBits(&pucDiscreteInputBuf[iRegIndex++],iRegBitIndex, 8);iNReg--;}pucRegBuffer--;/* last discrete */usNDiscrete = usNDiscrete % 8;/* filling zero to high bit */*pucRegBuffer = *pucRegBuffer << (8 - usNDiscrete);*pucRegBuffer = *pucRegBuffer >> (8 - usNDiscrete);}else{eStatus = MB_ENOREG;}return eStatus;
}

重新编译，0错误，0警告

5.添加接口

分别创建rcc.h、rcc.c、nvic.h、nvic.c文件

/************************************** 文件名:rcc.h* 作者:   stone* 版本:  V0.1* 日期:   2018-3-29* 描述:  配置时钟源************************************/
#ifndef __RCC_H_
#define __RCC_H_/* 功能:  RCC时钟配置参数:  无返回值:无*/
void rcc_config(void);#endif

/************************************** 文件名: rcc.c* 作者:      stone* 版本:      V0.1* 日期:       2018-3-29* 描述:      配置时钟源************************************/
#include "stm32f10x.h"
#include "stm32f10x_flash.h"
#include "rcc.h"/* 功能:    RCC时钟配置参数:  无返回值:无*/
void rcc_config(void)
{ ErrorStatus HSEStartUpStatus;/* RCC寄存器设置为默认配置 */RCC_DeInit();/* 打开外部高速时钟 */RCC_HSEConfig(RCC_HSE_ON);/* 等待外部高速时钟稳定 */HSEStartUpStatus = RCC_WaitForHSEStartUp();if(HSEStartUpStatus == SUCCESS) { /* 设置HCLK = SYSCLK */RCC_HCLKConfig(RCC_SYSCLK_Div1);/* 设置PCLK2 = HCLK */RCC_PCLK2Config(RCC_HCLK_Div1);/* 设置PCLK1 = HCLK / 2 */RCC_PCLK1Config(RCC_HCLK_Div2);/* 设置FLASH代码延时 */FLASH_SetLatency(FLASH_Latency_2);/* 使能预取址缓存 */FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);/* 设置PLL时钟源为HSE倍频9 72MHz */RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);/* 使能PLL */RCC_PLLCmd(ENABLE);/* 等待PLL稳定 */while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);/* 设置PLL为系统时钟源 */RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);/* 等待系统时钟源切换到PLL */while(RCC_GetSYSCLKSource() != 0x08);}
}

/************************************** 文件名: nvic.h* 作者:     stone* 版本:      V0.1* 日期:       2018-3-29* 描述:      设置中断控制器************************************/
#ifndef __NVIC_H_
#define __NVIC_H_/* 功能: 中断嵌套控制器配置参数:    无返回值:无*/
void nvic_config(void);#endif

/************************************** 文件名: nvic.c* 作者:     stone* 版本:      V0.1* 日期:       2018-3-29* 描述:      设置中断控制器************************************/
#include "stm32f10x.h"
#include "nvic.h"/* 功能:   中断嵌套控制器配置参数:    无返回值:无*/
void nvic_config(void)
{/* 选择中断分组2 */NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
}

8.协议栈移植工作完成。

#include "stm32f10x.h"
#include "rcc.h"
#include "nvic.h"
#include "mb.h"int main(void)
{/* RCC时钟配置 */rcc_config();/* 中断嵌套控制器配置 */nvic_config();/* 设置从节点ID */eMBSetSlaveID(1, TRUE, 0, 0);/* 初始化Modbus */eMBInit(MB_RTU, 1, 1, 115200, MB_PAR_NONE);/* 使能Modbus */eMBEnable();/* 主循环 */while(1){/* 轮询Modbus */eMBPoll();}
}

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