做网站页面代码,o2o的含义,wordpress 中文版 docker,园林设计添加FreeModbus代码
首先准备一个空白的标准库项目。
下载FreeModbus源码。
将源码中的modbus文件夹复制到项目路径下#xff0c;并把demo-BARE-port文件夹的内容也添加进来。 新建一个文件port.c备用。然后打开项目#xff0c;将上述文件添加至项目#xff0c;…添加FreeModbus代码
首先准备一个空白的标准库项目。
下载FreeModbus源码。
将源码中的modbus文件夹复制到项目路径下并把demo-BARE-port文件夹的内容也添加进来。 新建一个文件port.c备用。然后打开项目将上述文件添加至项目最好是按照文件夹建立不同分组。
完成后的项目结构如下 然后添加头文件路径将modbus与port文件夹的内容包含。
修改代码
portserial.c
首先是串口文件portserial.c
void
vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
{
}BOOL
xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
{return FALSE;
}BOOL
xMBPortSerialPutByte( CHAR ucByte )
{return TRUE;
}BOOL
xMBPortSerialGetByte( CHAR * pucByte )
{return TRUE;
}static void prvvUARTTxReadyISR( void )
{pxMBFrameCBTransmitterEmpty( );
}static void prvvUARTRxISR( void )
{pxMBFrameCBByteReceived( );
}我们进行以下修改
在vMBPortSerialEnable函数进行串口中断的使能与失能其实是切换发送或者接收。FreeModbus使用中断来进行数据的收发但是由于Modbus协议特性同时只能开启一种中断即不能进行同时收发。
根据参数xRxEnable与xTxEnable的值开启或关闭对应中断。这里发送中断选择TC、接收中断选择RXNE。
void
vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
{if (xTxEnable){USART_ITConfig(USART3,USART_IT_TC,ENABLE);}else{USART_ITConfig(USART3,USART_IT_TC,DISABLE);}if (xRxEnable){USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);}else{USART_ITConfig(USART3,USART_IT_RXNE,DISABLE);}
}xMBPortSerialInit函数进行串口初始化。传入的参数是串口、波特率、数据位与校验位。根据传入的参数对串口初始化初始化成功返回TRUE否则返回FALSE。
可以通过传入的参数进行灵活初始化也可以不管参数将初始化写死。这里使用UART3波特率与参数一致停止位1位无校验位
BOOL
xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
{RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//打开串口3的GPIO时钟RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);//打开串口3时钟//配置USART3的RX,TX的GPIO口GPIO_InitTypeDef GPIO_InitStruct;GPIO_InitStruct.GPIO_Pin GPIO_Pin_10; //将USART3_TX配置为复用推挽输出模式GPIO_InitStruct.GPIO_Mode GPIO_Mode_AF_PP;GPIO_InitStruct.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(GPIOB,GPIO_InitStruct);GPIO_InitStruct.GPIO_Pin GPIO_Pin_11; //将USART3_RX配置为浮空输入模式GPIO_InitStruct.GPIO_Mode GPIO_Mode_IN_FLOATING;GPIO_InitStruct.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(GPIOB,GPIO_InitStruct);//配置USART3USART_InitTypeDef USART_InitStruct;USART_InitStruct.USART_WordLength USART_WordLength_8b;USART_InitStruct.USART_StopBits USART_StopBits_1;USART_InitStruct.USART_BaudRate ulBaudRate;USART_InitStruct.USART_Parity USART_Parity_No;USART_InitStruct.USART_HardwareFlowControl USART_HardwareFlowControl_None;USART_InitStruct.USART_Mode USART_Mode_Rx|USART_Mode_Tx;USART_Init(USART3,USART_InitStruct);USART_Cmd(USART3,ENABLE);//配置中断NVIC_InitTypeDef NVIC_InitStruct;NVIC_InitStruct.NVIC_IRQChannelCmd ENABLE;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority 1;NVIC_InitStruct.NVIC_IRQChannelSubPriority 1;NVIC_InitStruct.NVIC_IRQChannel USART3_IRQn;NVIC_Init(NVIC_InitStruct);return TRUE;
}xMBPortSerialPutByte与xMBPortSerialGetByte实现单字节收发
BOOL
xMBPortSerialPutByte( CHAR ucByte )
{USART_SendData(USART3,ucByte);return TRUE;
}BOOL
xMBPortSerialGetByte( CHAR * pucByte )
{*pucByte USART_ReceiveData(USART3);return TRUE;
}实现串口的中断函数。要求是发生发送与接收中断时调用对应的函数。
void USART3_IRQHandler(void)
{if(USART_GetITStatus(USART3, USART_IT_RXNE) SET){prvvUARTRxISR(); USART_ClearITPendingBit(USART3, USART_IT_RXNE); }if(USART_GetITStatus(USART3, USART_IT_TC) SET){prvvUARTTxReadyISR();USART_ClearITPendingBit(USART3, USART_IT_TC);}
}完整的portserial.c函数如下
#include port.h
#include stm32f10x.h
/* ----------------------- Modbus includes ----------------------------------*/
#include mb.h
#include mbport.h/* ----------------------- static functions ---------------------------------*/
static void prvvUARTTxReadyISR( void );
static void prvvUARTRxISR( void );/* ----------------------- Start implementation -----------------------------*/
void
vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
{if (xTxEnable){USART_ITConfig(USART3,USART_IT_TC,ENABLE);}else{USART_ITConfig(USART3,USART_IT_TC,DISABLE);}if (xRxEnable){USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);}else{USART_ITConfig(USART3,USART_IT_RXNE,DISABLE);}
}BOOL
xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
{RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//打开串口3的GPIO时钟RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);//打开串口3时钟//配置USART3的RX,TX的GPIO口GPIO_InitTypeDef GPIO_InitStruct;GPIO_InitStruct.GPIO_Pin GPIO_Pin_10; //将USART3_TX配置为复用推挽输出模式GPIO_InitStruct.GPIO_Mode GPIO_Mode_AF_PP;GPIO_InitStruct.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(GPIOB,GPIO_InitStruct);GPIO_InitStruct.GPIO_Pin GPIO_Pin_11; //将USART3_RX配置为浮空输入模式GPIO_InitStruct.GPIO_Mode GPIO_Mode_IN_FLOATING;GPIO_InitStruct.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(GPIOB,GPIO_InitStruct);//配置USART3USART_InitTypeDef USART_InitStruct;USART_InitStruct.USART_WordLength USART_WordLength_8b;USART_InitStruct.USART_StopBits USART_StopBits_1;USART_InitStruct.USART_BaudRate ulBaudRate;USART_InitStruct.USART_Parity USART_Parity_No;USART_InitStruct.USART_HardwareFlowControl USART_HardwareFlowControl_None;USART_InitStruct.USART_Mode USART_Mode_Rx|USART_Mode_Tx;USART_Init(USART3,USART_InitStruct);USART_Cmd(USART3,ENABLE);//配置中断NVIC_InitTypeDef NVIC_InitStruct;NVIC_InitStruct.NVIC_IRQChannelCmd ENABLE;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority 1;NVIC_InitStruct.NVIC_IRQChannelSubPriority 1;NVIC_InitStruct.NVIC_IRQChannel USART3_IRQn;NVIC_Init(NVIC_InitStruct);return TRUE;
}BOOL
xMBPortSerialPutByte( CHAR ucByte )
{USART_SendData(USART3,ucByte);return TRUE;
}BOOL
xMBPortSerialGetByte( CHAR * pucByte )
{*pucByte USART_ReceiveData(USART3);return TRUE;
}/* Create an interrupt handler for the transmit buffer empty interrupt* (or an equivalent) for your target processor. This function should then* call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that* a new character can be sent. The protocol stack will then call * xMBPortSerialPutByte( ) to send the character.*/
static void prvvUARTTxReadyISR( void )
{pxMBFrameCBTransmitterEmpty( );
}/* Create an interrupt handler for the receive interrupt for your target* processor. This function should then call pxMBFrameCBByteReceived( ). The* protocol stack will then call xMBPortSerialGetByte( ) to retrieve the* character.*/
static void prvvUARTRxISR( void )
{pxMBFrameCBByteReceived( );
}void USART3_IRQHandler(void)
{if(USART_GetITStatus(USART3, USART_IT_RXNE) SET){prvvUARTRxISR(); USART_ClearITPendingBit(USART3, USART_IT_RXNE); }if(USART_GetITStatus(USART3, USART_IT_TC) SET){prvvUARTTxReadyISR();USART_ClearITPendingBit(USART3, USART_IT_TC);}
}porttimer.c
本文件夹是初始化定时器实现帧结束的截取。
xMBPortTimersInit初始化定时器需要将计数间隔设定为50us设时钟72MHz这里将分频系数设置到3600-1实现50us计时定时周期按参数设置并使能更新中断。这里我使用TIM1。
BOOL
xMBPortTimersInit( USHORT usTim1Timerout50us )
{RCC_APB2PeriphClockCmd(RCC_APB2ENR_TIM1EN,ENABLE);TIM_TimeBaseInitTypeDef tbit;tbit.TIM_Prescaler 3600-1;tbit.TIM_Period usTim1Timerout50us;tbit.TIM_ClockDivision TIM_CKD_DIV1;tbit.TIM_CounterMode TIM_CounterMode_Up;tbit.TIM_RepetitionCounter 0;TIM_TimeBaseInit(TIM1,tbit);TIM_ClearFlag(TIM1,TIM_IT_Update);NVIC_InitTypeDef nvic_inittypeddef;nvic_inittypeddef.NVIC_IRQChannel TIM1_UP_IRQn;nvic_inittypeddef.NVIC_IRQChannelCmd ENABLE;nvic_inittypeddef.NVIC_IRQChannelPreemptionPriority 0;nvic_inittypeddef.NVIC_IRQChannelSubPriority 3;NVIC_Init(nvic_inittypeddef);return TRUE;
}vMBPortTimersEnable与vMBPortTimersDisable函数进行定时器的使能与失能去掉inline。并写对应的中断函数当中断触发时调用FreeModbus写好的处理函数。
void
vMBPortTimersEnable( )
{TIM_ClearITPendingBit(TIM1, TIM_IT_Update);TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);TIM_SetCounter(TIM1, 0);TIM_Cmd(TIM1, ENABLE);/* Enable the timer with the timeout passed to xMBPortTimersInit( ) */
}void
vMBPortTimersDisable( )
{TIM_ClearITPendingBit(TIM1, TIM_IT_Update);TIM_ITConfig(TIM1, TIM_IT_Update, DISABLE);TIM_SetCounter(TIM1, 0);TIM_Cmd(TIM1, DISABLE);/* Disable any pending timers. */
}void TIM1_UP_IRQHandler(void)
{if (TIM_GetITStatus(TIM1, TIM_IT_Update) ! RESET){prvvTIMERExpiredISR();TIM_ClearITPendingBit(TIM1, TIM_IT_Update);}
}以下是本文件全部内容
/* ----------------------- Platform includes --------------------------------*/
#include port.h
#include stm32f10x.h
/* ----------------------- Modbus includes ----------------------------------*/
#include mb.h
#include mbport.h/* ----------------------- static functions ---------------------------------*/
static void prvvTIMERExpiredISR( void );/* ----------------------- Start implementation -----------------------------*/
BOOL
xMBPortTimersInit( USHORT usTim1Timerout50us )
{RCC_APB2PeriphClockCmd(RCC_APB2ENR_TIM1EN,ENABLE);TIM_TimeBaseInitTypeDef tbit;tbit.TIM_Prescaler 3600-1;tbit.TIM_Period usTim1Timerout50us;tbit.TIM_ClockDivision TIM_CKD_DIV1;tbit.TIM_CounterMode TIM_CounterMode_Up;tbit.TIM_RepetitionCounter 0;TIM_TimeBaseInit(TIM1,tbit);TIM_ClearFlag(TIM1,TIM_IT_Update);NVIC_InitTypeDef nvic_inittypeddef;nvic_inittypeddef.NVIC_IRQChannel TIM1_UP_IRQn;nvic_inittypeddef.NVIC_IRQChannelCmd ENABLE;nvic_inittypeddef.NVIC_IRQChannelPreemptionPriority 0;nvic_inittypeddef.NVIC_IRQChannelSubPriority 3;NVIC_Init(nvic_inittypeddef);return TRUE;
}void
vMBPortTimersEnable( )
{TIM_ClearITPendingBit(TIM1, TIM_IT_Update);TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);TIM_SetCounter(TIM1, 0);TIM_Cmd(TIM1, ENABLE);/* Enable the timer with the timeout passed to xMBPortTimersInit( ) */
}void
vMBPortTimersDisable( )
{TIM_ClearITPendingBit(TIM1, TIM_IT_Update);TIM_ITConfig(TIM1, TIM_IT_Update, DISABLE);TIM_SetCounter(TIM1, 0);TIM_Cmd(TIM1, DISABLE);/* Disable any pending timers. */
}/* Create an ISR which is called whenever the timer has expired. This function* must then call pxMBPortCBTimerExpired( ) to notify the protocol stack that* the timer has expired.*/
static void prvvTIMERExpiredISR( void )
{( void )pxMBPortCBTimerExpired( );
}void TIM1_UP_IRQHandler(void)
{if (TIM_GetITStatus(TIM1, TIM_IT_Update) ! RESET){prvvTIMERExpiredISR();TIM_ClearITPendingBit(TIM1, TIM_IT_Update);}
}mbconfig.h
第49行将宏MB_ASCII_ENABLED失能因为我们这里只使用RTU。 这个文件可以选择使能Modbus功能码函数实现功能裁剪。
此时进行编译会发现会报以下错误 四种数据类型线圈、离散量、输入寄存器、保持寄存器的操作函数与断言的定义没有实现所以需要继续实现它们。
port.c
这个文件是自己新建的我们在这个文件实现上述缺少的函数。
如何实现这些函数同样可以参考Demo文件夹中的示例。例如Demo-MSP430-demo.c中的内容这一部分可以复制到port.c中
#include mb.h
#define REG_INPUT_START 0
#define REG_INPUT_NREGS 10
#define REG_HOLDING_START 0
#define REG_HOLDING_NREGS 10static USHORT usRegInputStart REG_INPUT_START;
static USHORT usRegInputBuf[REG_INPUT_NREGS];
static USHORT usRegHoldingStart REG_HOLDING_START;
static USHORT usRegHoldingBuf[REG_HOLDING_NREGS];eMBErrorCode
eMBRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs )
{eMBErrorCode eStatus MB_ENOERR;int iRegIndex;if( ( (int16_t)usAddress REG_INPUT_START ) ( usAddress usNRegs REG_INPUT_START REG_INPUT_NREGS ) ){iRegIndex ( int )( usAddress - usRegInputStart );while( usNRegs 0 ){*pucRegBuffer ( unsigned char )( usRegInputBuf[iRegIndex] 8 );*pucRegBuffer ( unsigned char )( usRegInputBuf[iRegIndex] 0xFF );iRegIndex;usNRegs--;}}else{eStatus MB_ENOREG;}return eStatus;
}eMBErrorCode
eMBRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode )
{eMBErrorCode eStatus MB_ENOERR;int iRegIndex;if( ( (int16_t)usAddress REG_HOLDING_START ) ( usAddress usNRegs REG_HOLDING_START REG_HOLDING_NREGS ) ){iRegIndex ( int )( usAddress - usRegHoldingStart );switch ( eMode ){/* Pass current register values to the protocol stack. */case MB_REG_READ:while( usNRegs 0 ){*pucRegBuffer ( unsigned char )( usRegHoldingBuf[iRegIndex] 8 );*pucRegBuffer ( unsigned char )( usRegHoldingBuf[iRegIndex] 0xFF );iRegIndex;usNRegs--;}break;/* Update current register values with new values from the* protocol stack. */case MB_REG_WRITE:while( usNRegs 0 ){usRegHoldingBuf[iRegIndex] *pucRegBuffer 8;usRegHoldingBuf[iRegIndex] | *pucRegBuffer;iRegIndex;usNRegs--;}}}else{eStatus MB_ENOREG;}return eStatus;
}前面的数组usRegInputBuf与usRegHoldingBuf就是操作的输入寄存器与保持寄存器而REG_INPUT_START与REG_HOLDING_START是这两类寄存器的起始地址。当从机收到特定的功能码时会转为对这些数据变量的操作。
下面的eMBRegInputCB与eMBRegHoldingCB就是输入寄存器与保持寄存器对应的处理函数。在Modbus协议层面来讲就是实现了对应的功能码。虽然目前看不懂具体实现但是只需要贴进来用即可。
下面打开源码Demo-STR71X-excolis.c与exdisc.c线圈量与离散量的处理函数就在里面。与寄存器类似将它们复制到port.c。
#include mbutils.h
#define REG_COILS_START 0
#define REG_COILS_SIZE 16
static unsigned char ucRegCoilsBuf[REG_COILS_SIZE / 8];eMBErrorCode
eMBRegCoilsCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNCoils,eMBRegisterMode eMode )
{eMBErrorCode eStatus MB_ENOERR;int iNCoils ( int )usNCoils;unsigned short usBitOffset;/* Check if we have registers mapped at this block. */if( ( (int16_t)usAddress REG_COILS_START ) ( usAddress usNCoils REG_COILS_START REG_COILS_SIZE ) ){usBitOffset ( unsigned short )( usAddress - REG_COILS_START );switch ( eMode ){/* Read current values and pass to protocol stack. */case MB_REG_READ:while( iNCoils 0 ){*pucRegBuffer xMBUtilGetBits( ucRegCoilsBuf, usBitOffset,( unsigned char )( iNCoils 8 ? 8 :iNCoils ) );iNCoils - 8;usBitOffset 8;}break;/* Update current register values. */case MB_REG_WRITE:while( iNCoils 0 ){xMBUtilSetBits( ucRegCoilsBuf, usBitOffset, ( unsigned char )( iNCoils 8 ? 8 : iNCoils ),*pucRegBuffer );iNCoils - 8;usBitOffset 8;}break;}}else{eStatus MB_ENOREG;}return eStatus;
}#define REG_DISC_START 0
#define REG_DISC_SIZE 16
static unsigned char ucRegDiscBuf[REG_DISC_SIZE / 8] { 0, 0 };eMBErrorCode
eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNDiscrete )
{eMBErrorCode eStatus MB_ENOERR;short iNDiscrete ( short )usNDiscrete;unsigned short usBitOffset;/* Check if we have registers mapped at this block. */if( ( (int16_t)usAddress REG_DISC_START ) ( usAddress usNDiscrete REG_DISC_START REG_DISC_SIZE ) ){usBitOffset ( unsigned short )( usAddress - REG_DISC_START );while( iNDiscrete 0 ){*pucRegBuffer xMBUtilGetBits( ucRegDiscBuf, usBitOffset,( unsigned char )( iNDiscrete 8 ? 8 : iNDiscrete ) );iNDiscrete - 8;usBitOffset 8;}}else{eStatus MB_ENOREG;}return eStatus;
}注意开关量与离散量都是位数据因此数组长度会除以8。
然后再给断言函数加上整个port.c就写好了。
void __aeabi_assert(const char * x1, const char * x2, int x3)
{}实现上述函数与数据就实现了Modbus绝大多数功能码。
mbrtu.c的eMBRTUSend函数
第213行后面添加代码
xMBPortSerialPutByte( ( CHAR )*pucSndBufferCur );
pucSndBufferCur; /* next byte in sendbuffer. */
usSndBufferCount--;更新后的eMBRTUSend函数
eMBErrorCode
eMBRTUSend( UCHAR ucSlaveAddress, const UCHAR * pucFrame, USHORT usLength )
{eMBErrorCode eStatus MB_ENOERR;USHORT usCRC16;ENTER_CRITICAL_SECTION( );/* Check if the receiver is still in idle state. If not we where to* slow with processing the received frame and the master sent another* frame on the network. We have to abort sending the frame.*/if( eRcvState STATE_RX_IDLE ){/* First byte before the Modbus-PDU is the slave address. */pucSndBufferCur ( UCHAR * ) pucFrame - 1;usSndBufferCount 1;/* Now copy the Modbus-PDU into the Modbus-Serial-Line-PDU. */pucSndBufferCur[MB_SER_PDU_ADDR_OFF] ucSlaveAddress;usSndBufferCount usLength;/* Calculate CRC16 checksum for Modbus-Serial-Line-PDU. */usCRC16 usMBCRC16( ( UCHAR * ) pucSndBufferCur, usSndBufferCount );ucRTUBuf[usSndBufferCount] ( UCHAR )( usCRC16 0xFF );ucRTUBuf[usSndBufferCount] ( UCHAR )( usCRC16 8 );/* Activate the transmitter. */eSndState STATE_TX_XMIT;xMBPortSerialPutByte((CHAR)*pucSndBufferCur);pucSndBufferCur;usSndBufferCount--;vMBPortSerialEnable( FALSE, TRUE );}else{eStatus MB_EIO;}EXIT_CRITICAL_SECTION( );return eStatus;
}mbfunccoils.c,mbfuncdisc.c,mbfuncholding.c,mbfuncinput.c
首先去掉所有的usRegAddress否则实际操作会比期望地址大一。
然后mbfuncholding.c第185行添加一个或负号
usRegCount | ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF 1] );至此代码修改完成编译应该没有error了。
测试
main文件
#include stm32f10x.h
#include mb.h
int main(void){eMBInit(MB_RTU, 0X01, 3, 9600, MB_PAR_NONE);//初始化FreeModbuseMBEnable();//FreeModbus使能while (1){eMBPoll();//在while (1)循环调用eMBPoll()}
}eMBInit进行初始化其中第一个参数表示协议第二个参数是从机地址后面三个是初始化串口那个函数的参数可以跳转到那里进行对照这里配置为串口3波特率9600不校验
eMBEnable()启动FreeModbus后不断调用eMBPoll()即可。
port.c
这里我们修改一下各个位数据与寄存器的初始值方便观察结果。
static USHORT usRegInputBuf[REG_INPUT_NREGS] {0,1,2,3,4,5,6,7,8,9};
static USHORT usRegHoldingBuf[REG_HOLDING_NREGS] {10,11,12,13,14,15,16,17,18,19};
static unsigned char ucRegCoilsBuf[REG_COILS_SIZE / 8] {0x12,0x34};
static unsigned char ucRegDiscBuf[REG_DISC_SIZE / 8] {0x56,0x78};使用ModbusPoll连接看到可以正常读出数据
