381 lines
9.3 KiB
C
381 lines
9.3 KiB
C
#include <stdio.h>
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#include <string.h>
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#include "br_modbus.h"
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#include <stdint.h>
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#include "br_modbus_reg.h"
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uint8_t * prv_rx_buffer;
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static uint8_t BrMdBufferRes[256];
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uint8_t BrMdBufferCmd[256] = {0};
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uint8_t modbus_SlaveID = SLAVE_ID_DEFAULT;
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uint8_t * modbus_FrameBuff;
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uint8_t modbus_FrameCnt;
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// Private function prototype.
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void modbus_03_solver(uint8_t slaveId, uint8_t * resBuffer, uint8_t * resLen);
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void modbus_06_solver(uint8_t slaveId, uint8_t * resBuffer, uint8_t * resLen);
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void modbus_10_solver(uint8_t slaveId, uint8_t * resBuffer, uint8_t * resLen);
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uint8_t modbus_extract_slaveid(void);
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uint8_t modbus_extract_funcode(void);
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uint16_t modbus_extract_startAddr(void);
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uint8_t modbus_extract_size(void);
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uint16_t modbus_extract_crc(uint8_t mFunCode);
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uint16_t modbus_extract_06_val(void);
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uint16_t modbus_extract_10_val(uint8_t idx);
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void modbus_FrameClearBuff(void);
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uint8_t modbus_FrameLoadByte(uint8_t aByte);
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uint8_t modbus_FrameLoadWord(uint16_t aWord);
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uint8_t modbus_extract_slaveid(void);
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uint8_t modbus_extract_funcode(void);
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/* --------------------------------------------------------------- */
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uint16_t modbus_extract_10_bytenum(void);
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uint16_t modbus_Retrieve16Value(uint8_t index);
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static uint16_t modbus_crc16_v3( const unsigned char *buf, unsigned int len )
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{
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static const uint16_t table[256] = {
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0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
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0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
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0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
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0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
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0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
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0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
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0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
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0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
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0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
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0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
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0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
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0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
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0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
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0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
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0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
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0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
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0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
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0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
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0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
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0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
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0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
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0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
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0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
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0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
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0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
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0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
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0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
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0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
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0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
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0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
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0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
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0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040 };
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uint8_t xor = 0;
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uint16_t crc = 0xFFFF;
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while(len--)
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{
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xor = (*buf++) ^ crc;
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crc >>= 8;
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crc ^= table[xor];
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}
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return crc;
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}
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// process modbus frame
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ModbusStatus_t modbus_process(const uint8_t * buffer_cmd, uint8_t recv_len, uint8_t * buffer_resp, uint8_t * resp_len)
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{
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uint8_t funCode;
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uint8_t slaveId;
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ModbusStatus_t status = MODBUS_STATUS_OK;
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memcpy(BrMdBufferCmd, buffer_cmd, recv_len);
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/* 提取slaveid */
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slaveId = modbus_extract_slaveid();
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/* 判断ID是否接受 */
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/* 提取funCode */
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funCode = modbus_extract_funcode();
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switch(funCode)
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{
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case 3:
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modbus_03_solver(slaveId, buffer_resp, resp_len);
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break;
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case 6:
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modbus_06_solver(slaveId, buffer_resp, resp_len);
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break;
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case 0x10:
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modbus_10_solver(slaveId, buffer_resp, resp_len);
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}
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return MODBUS_STATUS_OK;
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}
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uint8_t modbus_extract_slaveid(void)
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{
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return BrMdBufferCmd[0];
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}
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uint8_t modbus_extract_funcode(void)
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{
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return BrMdBufferCmd[MODBUS_FUN_CODE];
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}
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uint16_t modbus_extract_startAddr(void)
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{
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return ((uint16_t)BrMdBufferCmd[MODBUS_START_ADDR_H]<<8) +
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BrMdBufferCmd[MODBUS_START_ADDR_L];
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}
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uint8_t modbus_extract_size(void)
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{
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return ((uint16_t)BrMdBufferCmd[MODBUS_SIZE_H]<<8) +
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BrMdBufferCmd[MODBUS_SIZE_L];
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}
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uint16_t modbus_extract_crc(uint8_t mFunCode)
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{
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uint16_t crcRecv = 0;
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uint16_t size = 0;
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if( mFunCode == 3U || mFunCode == 6U ) {
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crcRecv = (((uint16_t) BrMdBufferCmd[7] ) << 8) +
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BrMdBufferCmd[6];
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}
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if( mFunCode == 0x10)
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{
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size = modbus_extract_size();
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crcRecv = (((uint16_t) BrMdBufferCmd[8 + size * 2] ) << 8) +
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BrMdBufferCmd[7 + size * 2] ;
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}
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return crcRecv;
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}
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void modbus_03_solver(uint8_t slaveId, uint8_t * resBuffer, uint8_t * resLen)
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{
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uint16_t startAddr, size;
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volatile uint16_t crcReceived,crcCalculate;
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uint8_t i;
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ModbusRegRwData_t rw_data;
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// get start reg address
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startAddr = modbus_extract_startAddr();
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size = modbus_extract_size();
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// get crc
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crcReceived = modbus_extract_crc(3);
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// calculate crc
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crcCalculate = modbus_crc16_v3(BrMdBufferCmd, 6);
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if(crcCalculate == crcReceived)
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{
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rw_data.slaveId = slaveId;
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rw_data.num = size;
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rw_data.operation = RW_OPERATION_READ;
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rw_data.startAddr = startAddr;
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if(modbus_reg_proxy(&rw_data) != 0)
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{
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/* 返回错误码 */
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printf("modbus_reg_proxy err!\n");
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}
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// clear frame buffer
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modbus_FrameClearBuff();
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// load adrress
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modbus_FrameLoadByte(modbus_SlaveID);
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// load fun code
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modbus_FrameLoadByte(3u);
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modbus_FrameLoadByte(size * 2);
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for(i = 0; i < size; i++)
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{
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modbus_FrameLoadWord(rw_data.registers[i]);
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}
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// crcCalculate = HAL_CRC_Calculate(&hcrc, (uint32_t *)&modbus_FrameBuff, modbus_FrameCnt);
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crcCalculate = modbus_crc16_v3(BrMdBufferRes, modbus_FrameCnt);
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modbus_FrameLoadByte(crcCalculate & 0x00FF);
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modbus_FrameLoadByte((crcCalculate & 0xFF00) >> 8);
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*resLen = modbus_FrameCnt;
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memcpy(resBuffer, BrMdBufferRes, *resLen);
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}
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}
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void modbus_06_solver(uint8_t slaveId, uint8_t * resBuffer, uint8_t * resLen)
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{
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uint16_t startAddr, val, crcCal, crcRecv;
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ModbusRegRwData_t rw_data;
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startAddr = modbus_extract_startAddr();
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crcCal = modbus_crc16_v3(BrMdBufferCmd, 6);
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crcRecv = modbus_extract_crc(6);
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if( crcCal == crcRecv ) {
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val = modbus_extract_06_val();
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rw_data.slaveId = slaveId;
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rw_data.num = 1;
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rw_data.operation = RW_OPERATION_WRITE;
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rw_data.startAddr = startAddr;
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rw_data.registers[0] = val;
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if(modbus_reg_proxy(&rw_data) != 0)
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{
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/* 返回错误码 */
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// printf("modbus_reg_proxy err!\n");
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;
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}
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modbus_FrameClearBuff();
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modbus_FrameLoadByte(modbus_SlaveID);
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modbus_FrameLoadByte(6U);
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modbus_FrameLoadWord(startAddr);
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modbus_FrameLoadWord(val);
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modbus_FrameLoadWord(crcCal>>8 | crcCal << 8);
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*resLen = modbus_FrameCnt;
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memcpy(resBuffer, BrMdBufferRes, *resLen);
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}
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else
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{
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/* 校验码错误处理 */
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}
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}
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void modbus_10_solver(uint8_t slaveId, uint8_t * resBuffer, uint8_t * resLen)
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{
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uint16_t address, byte_num, val, crcCal, crcRecv, size;
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uint8_t idx = 0;
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ModbusRegRwData_t rw_data = {0};
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address = modbus_extract_startAddr();
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byte_num = modbus_extract_10_bytenum();
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size = modbus_extract_size();
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crcCal = modbus_crc16_v3(BrMdBufferCmd, 7 + byte_num);
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crcRecv = modbus_extract_crc(0x10);
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if( crcCal == crcRecv ) {
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rw_data.slaveId = slaveId;
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rw_data.num = size;
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rw_data.operation = RW_OPERATION_WRITE;
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rw_data.startAddr = address;
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for(idx=0; idx<size; idx++)
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{
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val = modbus_extract_10_val(idx);
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rw_data.registers[idx] = val;
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}
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if(modbus_reg_proxy(&rw_data) != 0)
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{
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/* 返回错误码 */
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// printf("modbus_reg_proxy err!\n");
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;
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}
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/* ----------------------------------------- */
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modbus_FrameClearBuff();
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modbus_FrameLoadByte(modbus_SlaveID);
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modbus_FrameLoadByte(0x10u);
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modbus_FrameLoadWord(address);
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modbus_FrameLoadWord(size);
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crcCal = modbus_crc16_v3(BrMdBufferRes, modbus_FrameCnt);
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modbus_FrameLoadWord(crcCal>>8 | crcCal << 8);
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*resLen = modbus_FrameCnt;
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memcpy(resBuffer, BrMdBufferRes, *resLen);
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}
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else
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{
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/* 校验码错误处理 */
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}
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}
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uint16_t modbus_extract_10_bytenum(void)
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{
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return BrMdBufferCmd[6];
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}
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uint16_t modbus_extract_10_val(uint8_t idx)
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{
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return ((uint16_t)BrMdBufferCmd[7 + idx*2]<<8) +
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BrMdBufferCmd[8 + idx*2];
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}
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uint16_t modbus_extract_06_val(void)
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{
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return ((uint16_t)BrMdBufferCmd[MODBUS_06_VAL_H]<<8) +
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BrMdBufferCmd[MODBUS_06_VAL_L];
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}
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uint8_t modbus_RetrieveSlaveID(void)
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{
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return prv_rx_buffer[MODBUS_SLAVE_ID];
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}
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void modbus_FrameClearBuff(void){
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modbus_FrameCnt = 0;
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}
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uint8_t modbus_FrameLoadByte(uint8_t aByte)
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{
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uint8_t status;
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if(modbus_FrameCnt == 255) {
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status = 1;
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}
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else {
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BrMdBufferRes[modbus_FrameCnt] = aByte;
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modbus_FrameCnt++;
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status = 0;
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}
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return status;
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}
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uint8_t modbus_FrameLoadWord(uint16_t aWord)
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{
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uint8_t status;
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if(modbus_FrameCnt == 254)
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{
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status = 1;
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}
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else
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{
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BrMdBufferRes[modbus_FrameCnt] = (uint8_t)((aWord&0xFF00)>>8);
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modbus_FrameCnt++;
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BrMdBufferRes[modbus_FrameCnt] = (uint8_t)(aWord&0x00FF);
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modbus_FrameCnt++;
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status = 0;
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}
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return status;
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}
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