optical/NxFuncs/modbus/modbus_def.c

#include "modbus_def.h"

// 注册modbus通讯函数
void RegisterModbusCommFunc(ModbusCtrl* pCtrl, UsartSendData send, UsartGetData get, UsartCleanRsBuf clean, IsUsartSendOver sdover, OnOffFunc outen, OnOffFunc outdis)
{
	pCtrl->ModBusCommSend = send;
	pCtrl->ModBusCommReceive = get;
	pCtrl->ModBusCommCleanRsBuf = clean;
	pCtrl->IsModBusCommSendOver = sdover;

	pCtrl->CommOutEn = outen;
	pCtrl->CommOutDis = outdis;
}

//-----------------------------------------------------------------
// 默认函数
int DefSendData(u8 * pDatBuf, int len)
{
	return 0;
}

int DefGetData(u8 * pDat, int expectLen)
{
	return 0;
}

int DefCleanRsBuf(void)
{
	return 0;
}

int DefIsSendOver(void)
{
	return 0;
}

void DefOutEn(void)
{
}

void DefOutDis(void)
{
}

// ASCII码模式
//-----------------------------------------------------------------
// 功能:ASCII -> RTU

u8 AsciiToRtu(u8 ascii)
{
	if ((ascii >= '0') && (ascii <= '9'))
	{
		return ascii - '0';
	}
	else if ((ascii >= 'A') && (ascii <= 'F'))
	{
		return ascii - 'A' + 10;
	}
	else if ((ascii >= 'a') && (ascii <= 'f'))
	{
		return ascii - 'a' + 10;
	}
	else
	{
		return 0;
	}
}
//-----------------------------------------------------------------
// 功能:RTU -> ASCII

u8 RtuToAscii(u8 rtu)
{
	if (rtu < 10)
	{
		return rtu + '0';
	}
	else if (rtu < 16)
	{
		return rtu + 'A' - 10;
	}
	else
	{
		return rtu;
	}
}


//-----------------------------------------------------------------

// RTU模式下CRC校验数据计算
static unsigned char auchCRCHi[] =
{
	0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,
	0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
	0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,
	0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
	0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,
	0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,
	0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,
	0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
	0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,
	0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,
	0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,
	0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
	0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,
	0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,
	0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,
	0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
	0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,
	0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
	0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,
	0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
	0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,
	0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,
	0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,
	0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
	0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,
	0x80,0x41,0x00,0xC1,0x81,0x40
};

//CRC低位字节值表
static char auchCRCLo[] =
{
	0x00,0xC0,0xC1,0x01,0xC3,0x03,0x02,0xC2,0xC6,0x06,
	0x07,0xC7,0x05,0xC5,0xC4,0x04,0xCC,0x0C,0x0D,0xCD,
	0x0F,0xCF,0xCE,0x0E,0x0A,0xCA,0xCB,0x0B,0xC9,0x09,
	0x08,0xC8,0xD8,0x18,0x19,0xD9,0x1B,0xDB,0xDA,0x1A,
	0x1E,0xDE,0xDF,0x1F,0xDD,0x1D,0x1C,0xDC,0x14,0xD4,
	0xD5,0x15,0xD7,0x17,0x16,0xD6,0xD2,0x12,0x13,0xD3,
	0x11,0xD1,0xD0,0x10,0xF0,0x30,0x31,0xF1,0x33,0xF3,
	0xF2,0x32,0x36,0xF6,0xF7,0x37,0xF5,0x35,0x34,0xF4,
	0x3C,0xFC,0xFD,0x3D,0xFF,0x3F,0x3E,0xFE,0xFA,0x3A,
	0x3B,0xFB,0x39,0xF9,0xF8,0x38,0x28,0xE8,0xE9,0x29,
	0xEB,0x2B,0x2A,0xEA,0xEE,0x2E,0x2F,0xEF,0x2D,0xED,
	0xEC,0x2C,0xE4,0x24,0x25,0xE5,0x27,0xE7,0xE6,0x26,
	0x22,0xE2,0xE3,0x23,0xE1,0x21,0x20,0xE0,0xA0,0x60,
	0x61,0xA1,0x63,0xA3,0xA2,0x62,0x66,0xA6,0xA7,0x67,
	0xA5,0x65,0x64,0xA4,0x6C,0xAC,0xAD,0x6D,0xAF,0x6F,
	0x6E,0xAE,0xAA,0x6A,0x6B,0xAB,0x69,0xA9,0xA8,0x68,
	0x78,0xB8,0xB9,0x79,0xBB,0x7B,0x7A,0xBA,0xBE,0x7E,
	0x7F,0xBF,0x7D,0xBD,0xBC,0x7C,0xB4,0x74,0x75,0xB5,
	0x77,0xB7,0xB6,0x76,0x72,0xB2,0xB3,0x73,0xB1,0x71,
	0x70,0xB0,0x50,0x90,0x91,0x51,0x93,0x53,0x52,0x92,
	0x96,0x56,0x57,0x97,0x55,0x95,0x94,0x54,0x9C,0x5C,
	0x5D,0x9D,0x5F,0x9F,0x9E,0x5E,0x5A,0x9A,0x9B,0x5B,
	0x99,0x59,0x58,0x98,0x88,0x48,0x49,0x89,0x4B,0x8B,
	0x8A,0x4A,0x4E,0x8E,0x8F,0x4F,0x8D,0x4D,0x4C,0x8C,
	0x44,0x84,0x85,0x45,0x87,0x47,0x46,0x86,0x82,0x42,
	0x43,0x83,0x41,0x81,0x80,0x40
};

//添加一个crc校验值
void ModbusAddCrc16(u8 Data, u8 * pcrch, u8 * pcrcl)
{
	int idx;
	idx = *pcrch ^ Data;	/*计算CRC*/
	*pcrch = *pcrcl ^ auchCRCHi[idx];
	*pcrcl = auchCRCLo[idx];
}

//-----------------------------------------------------
// u8 *puchMsg;	//要进行CRC校验的消息
// u16 usDataLen;// 消息中字节数
u16 ModbusCrc16(u8 *puchMsg, u16 usDataLen)
{
	u8 crch, crcl;
	crch = 0xff;
	crcl = 0xff;

	while(usDataLen)	/// 传输消息缓冲区
	{
		ModbusAddCrc16(*puchMsg, &crch, &crcl);
		usDataLen--;
		puchMsg++;
	}

	return((crch<<8)|crcl);
}