dtu_lan_gateway/app/modbus/mmodbus.c

#include "mmodbus.h"
#include "usart.h"
#include "delay.h"

MModBus_t mmodbus;

// #####################################################################################################
#if (_MMODBUS_RTU == 1)
static const uint16_t wCRCTable[] =
    {
        0X0000, 0XC0C1, 0XC181, 0X0140, 0XC301, 0X03C0, 0X0280, 0XC241,
        0XC601, 0X06C0, 0X0780, 0XC741, 0X0500, 0XC5C1, 0XC481, 0X0440,
        0XCC01, 0X0CC0, 0X0D80, 0XCD41, 0X0F00, 0XCFC1, 0XCE81, 0X0E40,
        0X0A00, 0XCAC1, 0XCB81, 0X0B40, 0XC901, 0X09C0, 0X0880, 0XC841,
        0XD801, 0X18C0, 0X1980, 0XD941, 0X1B00, 0XDBC1, 0XDA81, 0X1A40,
        0X1E00, 0XDEC1, 0XDF81, 0X1F40, 0XDD01, 0X1DC0, 0X1C80, 0XDC41,
        0X1400, 0XD4C1, 0XD581, 0X1540, 0XD701, 0X17C0, 0X1680, 0XD641,
        0XD201, 0X12C0, 0X1380, 0XD341, 0X1100, 0XD1C1, 0XD081, 0X1040,
        0XF001, 0X30C0, 0X3180, 0XF141, 0X3300, 0XF3C1, 0XF281, 0X3240,
        0X3600, 0XF6C1, 0XF781, 0X3740, 0XF501, 0X35C0, 0X3480, 0XF441,
        0X3C00, 0XFCC1, 0XFD81, 0X3D40, 0XFF01, 0X3FC0, 0X3E80, 0XFE41,
        0XFA01, 0X3AC0, 0X3B80, 0XFB41, 0X3900, 0XF9C1, 0XF881, 0X3840,
        0X2800, 0XE8C1, 0XE981, 0X2940, 0XEB01, 0X2BC0, 0X2A80, 0XEA41,
        0XEE01, 0X2EC0, 0X2F80, 0XEF41, 0X2D00, 0XEDC1, 0XEC81, 0X2C40,
        0XE401, 0X24C0, 0X2580, 0XE541, 0X2700, 0XE7C1, 0XE681, 0X2640,
        0X2200, 0XE2C1, 0XE381, 0X2340, 0XE101, 0X21C0, 0X2080, 0XE041,
        0XA001, 0X60C0, 0X6180, 0XA141, 0X6300, 0XA3C1, 0XA281, 0X6240,
        0X6600, 0XA6C1, 0XA781, 0X6740, 0XA501, 0X65C0, 0X6480, 0XA441,
        0X6C00, 0XACC1, 0XAD81, 0X6D40, 0XAF01, 0X6FC0, 0X6E80, 0XAE41,
        0XAA01, 0X6AC0, 0X6B80, 0XAB41, 0X6900, 0XA9C1, 0XA881, 0X6840,
        0X7800, 0XB8C1, 0XB981, 0X7940, 0XBB01, 0X7BC0, 0X7A80, 0XBA41,
        0XBE01, 0X7EC0, 0X7F80, 0XBF41, 0X7D00, 0XBDC1, 0XBC81, 0X7C40,
        0XB401, 0X74C0, 0X7580, 0XB541, 0X7700, 0XB7C1, 0XB681, 0X7640,
        0X7200, 0XB2C1, 0XB381, 0X7340, 0XB101, 0X71C0, 0X7080, 0XB041,
        0X5000, 0X90C1, 0X9181, 0X5140, 0X9301, 0X53C0, 0X5280, 0X9241,
        0X9601, 0X56C0, 0X5780, 0X9741, 0X5500, 0X95C1, 0X9481, 0X5440,
        0X9C01, 0X5CC0, 0X5D80, 0X9D41, 0X5F00, 0X9FC1, 0X9E81, 0X5E40,
        0X5A00, 0X9AC1, 0X9B81, 0X5B40, 0X9901, 0X59C0, 0X5880, 0X9841,
        0X8801, 0X48C0, 0X4980, 0X8941, 0X4B00, 0X8BC1, 0X8A81, 0X4A40,
        0X4E00, 0X8EC1, 0X8F81, 0X4F40, 0X8D01, 0X4DC0, 0X4C80, 0X8C41,
        0X4400, 0X84C1, 0X8581, 0X4540, 0X8701, 0X47C0, 0X4680, 0X8641,
        0X8201, 0X42C0, 0X4380, 0X8341, 0X4100, 0X81C1, 0X8081, 0X4040};
// crc校验
uint16_t mmodbus_crc16(const uint8_t *nData, uint16_t wLength)
{
  uint8_t nTemp;
  uint16_t wCRCWord = 0xFFFF;
  while (wLength--)
  {
    nTemp = *nData++ ^ wCRCWord;
    wCRCWord >>= 8;
    wCRCWord ^= wCRCTable[nTemp];
  }
  return wCRCWord;
}



#endif
// #####################################################################################################
void mmodbus_callback(void)
{
  if (RESET != USART_GetFlagStatus(_MMODBUS_USART,USART_FLAG_RXNE))
  {
    if (mmodbus.rxIndex < _MMODBUS_RXSIZE - 1)
    {
      mmodbus.rxBuf[mmodbus.rxIndex] = USART_ReceiveData(_MMODBUS_USART);
      mmodbus.rxIndex++;
    }
    else
      USART_ReceiveData(_MMODBUS_USART);
  }

	if ((mmodbus.rxIndex > 0) && RESET != USART_GetFlagStatus(_MMODBUS_USART, USART_FLAG_IDLE))
	{	
		uint8_t i;	
		mmodbus.done = 1;			
		i = _MMODBUS_USART->SR;
		i = _MMODBUS_USART->DR;		
		return;
	}
		else
		{
			USART_GetITStatus(_MMODBUS_USART, USART_FLAG_RXNE);
		}
  mmodbus.rxTime = gettick();
}


// ##################################################################################################
uint16_t mmodbus_receiveRaw(uint32_t timeout)
{
  uint32_t startTime = gettick();
  while (1)
  {
    if (gettick() - startTime> timeout * 1000)
      return 0;
    if ((mmodbus.rxIndex > 0) && (RESET != USART_GetFlagStatus(_MMODBUS_USART, USART_FLAG_IDLE)))
    {
      USART_ReceiveData(_MMODBUS_USART);
      return mmodbus.rxIndex;
    }
    if (mmodbus.done == 1)
    {
      return mmodbus.rxIndex;
    }

    mmodbus_delay(1);
  }
}
// ##################################################################################################
bool mmodbus_sendRaw(uint8_t *data, uint16_t size, uint32_t timeout)
	{
	while(mmodbus.txBusy == 1)
	mmodbus_delay(1);
	mmodbus.txBusy = 1;
	memset(mmodbus.rxBuf, 0, _MMODBUS_RXSIZE);
	mmodbus.rxIndex = 0;
	OSIntEnter();
	uint32_t startTime = gettick();
	GPIO_WriteBit(_MMODBUS_CTRL_GPIO, _MMODBUS_CTRL_PIN,1);
	mmodbus_delay(1);
	for (uint16_t i = 0; i < size; i++)
	{
		USART_SendData(_MMODBUS_USART,data[i]);
		while (USART_GetFlagStatus(_MMODBUS_USART, USART_FLAG_TXE) == RESET);
	} 
	while (RESET == USART_GetFlagStatus(_MMODBUS_USART, USART_FLAG_TC));
	OSIntExit();
	GPIO_WriteBit(_MMODBUS_CTRL_GPIO, _MMODBUS_CTRL_PIN,0);
	mmodbus.done=0;
	mmodbus.txBusy = 0;
	return true;
}


// ##################################################################################################
bool mmodbus_init(uint32_t timeout)
{
  // HAL_GPIO_WritePin(_MMODBUS_CTRL_GPIO, _MMODBUS_CTRL_PIN, GPIO_PIN_RESET); 此处初始化在485 init过
	GPIO_WriteBit(_MMODBUS_CTRL_GPIO, _MMODBUS_CTRL_PIN,0);
  memset(&mmodbus, 0, sizeof(mmodbus));
  mmodbus.timeout = timeout;
  return true;
}
// ##################################################################################################
void mmodbus_set16bitOrder(MModBus_16bitOrder_t MModBus_16bitOrder_)
{
  mmodbus.byteOrder16 = MModBus_16bitOrder_;
}
// ##################################################################################################
void mmodbus_set32bitOrder(MModBus_32bitOrder_t MModBus_32bitOrder_)
{
  mmodbus.byteOrder32 = MModBus_32bitOrder_;
}
// ##################################################################################################
bool mmodbus_readCoil(uint8_t slaveAddress, uint16_t number, uint8_t *data)
{
  return mmodbus_readCoils(slaveAddress, number, 1, data);
}
// ##################################################################################################
// 读线圈
bool mmodbus_readCoils(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint8_t *data)
{
#if (_MMODBUS_RTU == 1)
  uint8_t txData[8];
  txData[0] = slaveAddress;
  txData[1] = MModbusCMD_ReadCoilStatus;
  txData[2] = (startnumber & 0xFF00) >> 8;
  txData[3] = (startnumber & 0x00FF);
  txData[4] = (length & 0xFF00) >> 8;
  txData[5] = (length & 0x00FF);
  static uint16_t crc;
  crc = mmodbus_crc16(txData, 6);
  txData[6] = (crc & 0x00FF);
  txData[7] = (crc & 0xFF00) >> 8;
  mmodbus_sendRaw(txData, 8, 100);
  uint16_t recLen = mmodbus_receiveRaw(mmodbus.timeout);
  if (recLen == 0)
    return false;
  if (mmodbus.rxBuf[0] != slaveAddress)
    return false;
  if (mmodbus.rxBuf[1] != MModbusCMD_ReadCoilStatus)
    return false;
  crc = mmodbus_crc16(mmodbus.rxBuf, mmodbus.rxBuf[2] + 3);
  if (((crc & 0x00FF) != mmodbus.rxBuf[mmodbus.rxBuf[2] + 3]) || (((crc & 0xFF00) >> 8) != mmodbus.rxBuf[mmodbus.rxBuf[2] + 4]))
    return false;
  if (data != NULL)
    memcpy(data, &mmodbus.rxBuf[3], mmodbus.rxBuf[2]);
  return true;
#endif
#if (_MMODBUS_ASCII == 1)

#endif
}
// ##################################################################################################
bool mmodbus_readDiscreteInput(uint8_t slaveAddress, uint16_t number, uint8_t *data)
{
  return mmodbus_readDiscreteInputs(slaveAddress, number, 1, data);
}
// ##################################################################################################
// 读取线圈功能码处理
bool mmodbus_readDiscreteInputs(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint8_t *data)
{
#if (_MMODBUS_RTU == 1)
  uint8_t txData[8];
  txData[0] = slaveAddress;
  txData[1] = MModbusCMD_ReadDiscreteInputs;
  txData[2] = (startnumber & 0xFF00) >> 8;
  txData[3] = (startnumber & 0x00FF);
  txData[4] = (length & 0xFF00) >> 8;
  txData[5] = (length & 0x00FF);
  static uint16_t crc;
  crc = mmodbus_crc16(txData, 6);
  txData[6] = (crc & 0x00FF);
  txData[7] = (crc & 0xFF00) >> 8;
  mmodbus_sendRaw(txData, 8, 100);
  uint16_t recLen = mmodbus_receiveRaw(mmodbus.timeout);
  if (recLen == 0)
    return false;
  if (mmodbus.rxBuf[0] != slaveAddress)
    return false;
  if (mmodbus.rxBuf[1] != MModbusCMD_ReadDiscreteInputs)
    return false;
  crc = mmodbus_crc16(mmodbus.rxBuf, mmodbus.rxBuf[2] + 3);
  if (((crc & 0x00FF) != mmodbus.rxBuf[mmodbus.rxBuf[2] + 3]) || (((crc & 0xFF00) >> 8) != mmodbus.rxBuf[mmodbus.rxBuf[2] + 4]))
    return false;
  if (data != NULL)
    memcpy(data, &mmodbus.rxBuf[3], mmodbus.rxBuf[2]);
  return true;
#endif
}
// ##################################################################################################

bool mmodbus_readInputRegisters8i(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint8_t *data)
{
#if (_MMODBUS_RTU == 1)
  uint8_t txData[8];
  txData[0] = slaveAddress;
  txData[1] = MModbusCMD_ReadInputRegisters;
  txData[2] = (startnumber & 0xFF00) >> 8;
  txData[3] = (startnumber & 0x00FF);
  txData[4] = (length & 0xFF00) >> 8;
  txData[5] = (length & 0x00FF);
  static uint16_t crc;
  crc = mmodbus_crc16(txData, 6);
  txData[6] = (crc & 0x00FF);
  txData[7] = (crc & 0xFF00) >> 8;
  mmodbus_sendRaw(txData, 8, 100);
  uint16_t recLen = mmodbus_receiveRaw(mmodbus.timeout);
  if (recLen == 0)
    return false;
  if (mmodbus.rxBuf[0] != slaveAddress)
    return false;
  if (mmodbus.rxBuf[1] != MModbusCMD_ReadInputRegisters)
    return false;
  crc = mmodbus_crc16(mmodbus.rxBuf, mmodbus.rxBuf[2] + 3);
  if (((crc & 0x00FF) != mmodbus.rxBuf[mmodbus.rxBuf[2] + 3]) || (((crc & 0xFF00) >> 8) != mmodbus.rxBuf[mmodbus.rxBuf[2] + 4]))
    return false;
  if (data != NULL)
    memcpy(data, &mmodbus.rxBuf[3], mmodbus.rxBuf[2]);
  return true;
#endif
}
// ##################################################################################################
bool mmodbus_readInputRegister32f(uint8_t slaveAddress, uint16_t number, float *data)
{
  return mmodbus_readInputRegisters32f(slaveAddress, number, 1, data);
}
// ##################################################################################################
bool mmodbus_readInputRegisters32f(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, float *data)
{
  bool ret = mmodbus_readInputRegisters8i(slaveAddress, startnumber, length * 2, (uint8_t *)data);
  if (ret == true)
  {
    for (uint16_t i = 0; i < length; i++)
    {
      uint8_t tmp1[4], tmp2[4];
      switch (mmodbus.byteOrder32)
      {
      case MModBus_32bitOrder_DCBA:
        memcpy(tmp1, &data[i], 4);
        tmp2[0] = tmp1[3];
        tmp2[1] = tmp1[2];
        tmp2[2] = tmp1[1];
        tmp2[3] = tmp1[0];
        memcpy(&data[i], tmp2, 4);
        break;
      case MModBus_32bitOrder_BADC:
        memcpy(tmp1, &data[i], 4);
        tmp2[0] = tmp1[1];
        tmp2[1] = tmp1[0];
        tmp2[2] = tmp1[3];
        tmp2[3] = tmp1[2];
        memcpy(&data[i], tmp2, 4);
        break;
      case MModBus_32bitOrder_CDAB:
        memcpy(tmp1, &data[i], 4);
        tmp2[0] = tmp1[2];
        tmp2[1] = tmp1[3];
        tmp2[2] = tmp1[0];
        tmp2[3] = tmp1[1];
        memcpy(&data[i], tmp2, 4);
        break;
      default:

        break;
      }
    }
    return true;
  }
  else
    return false;
}
// ##################################################################################################
bool mmodbus_readInputRegister32i(uint8_t slaveAddress, uint16_t number, uint32_t *data)
{
  return mmodbus_readInputRegisters32i(slaveAddress, number, 1, data);
}
// ##################################################################################################
bool mmodbus_readInputRegisters32i(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint32_t *data)
{
  return mmodbus_readInputRegisters32f(slaveAddress, startnumber, length, (float *)data);
}
// ##################################################################################################
bool mmodbus_readInputRegister16i(uint8_t slaveAddress, uint16_t number, uint16_t *data)
{
  return mmodbus_readInputRegisters16i(slaveAddress, number, 1, data);
}
// ##################################################################################################
bool mmodbus_readInputRegisters16i(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint16_t *data)
{
  bool ret = mmodbus_readInputRegisters8i(slaveAddress, startnumber, length * 1, (uint8_t *)data);
  if (ret == true)
  {
    uint8_t tmp1[2], tmp2[2];
    for (uint16_t i = 0; i < length; i++)
    {
      switch (mmodbus.byteOrder16)
      {
      case MModBus_16bitOrder_AB:
        memcpy(tmp1, &data[i], 2);
        tmp2[0] = tmp1[0];
        tmp2[1] = tmp1[1];
        memcpy(&data[i], tmp2, 2);
        break;
      default:
        memcpy(tmp1, &data[i], 2);
        tmp2[0] = tmp1[1];
        tmp2[1] = tmp1[0];
        memcpy(&data[i], tmp2, 2);
        break;
      }
    }
    return true;
  }
  else
    return false;
}
// ##################################################################################################
bool mmodbus_readHoldingRegisters8i(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint8_t *data)
{
#if (_MMODBUS_RTU == 1)
  uint8_t txData[8];
  txData[0] = slaveAddress;
  txData[1] = MModbusCMD_ReadHoldingRegisters;
  txData[2] = (startnumber & 0xFF00) >> 8;
  txData[3] = (startnumber & 0x00FF);
  txData[4] = (length & 0xFF00) >> 8;
  txData[5] = (length & 0x00FF);
  static uint16_t crc;
  crc = mmodbus_crc16(txData, 6);
  txData[6] = (crc & 0x00FF);
  txData[7] = (crc & 0xFF00) >> 8;
  mmodbus_sendRaw(txData, 8, 100);
  uint16_t recLen = mmodbus_receiveRaw(mmodbus.timeout);
  if (recLen == 0)
    return false;
  if (mmodbus.rxBuf[0] != slaveAddress)
    return false;
  if (mmodbus.rxBuf[1] != MModbusCMD_ReadHoldingRegisters)
    return false;
  crc = mmodbus_crc16(mmodbus.rxBuf, mmodbus.rxBuf[2] + 3);
  if (((crc & 0x00FF) != mmodbus.rxBuf[mmodbus.rxBuf[2] + 3]) || (((crc & 0xFF00) >> 8) != mmodbus.rxBuf[mmodbus.rxBuf[2] + 4]))
    return false;
  if (data != NULL)
  {
    for (uint8_t i = 0; i < mmodbus.rxBuf[2]; i += 2)
    {
      uint8_t H = mmodbus.rxBuf[i + 3];
      mmodbus.rxBuf[i + 3] = mmodbus.rxBuf[i + 3 + 1];
      mmodbus.rxBuf[i + 3 + 1] = H;
    }
    memcpy(data, &mmodbus.rxBuf[3], mmodbus.rxBuf[2]);
  }
  return true;
#endif
}
// ##################################################################################################
bool mmodbus_readHoldingRegister32f(uint8_t slaveAddress, uint16_t number, float *data)
{
  return mmodbus_readHoldingRegisters32f(slaveAddress, number, 1, data);
}
// ##################################################################################################
bool mmodbus_readHoldingRegisters32f(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, float *data)
{
  bool ret = mmodbus_readHoldingRegisters8i(slaveAddress, startnumber, length * 2, (uint8_t *)data);
  if (ret == true)
  {
    for (uint16_t i = 0; i < length; i++)
    {
      uint8_t tmp1[4], tmp2[4];
      switch (mmodbus.byteOrder32)
      {
      case MModBus_32bitOrder_DCBA:
        memcpy(tmp1, &data[i], 4);
        tmp2[0] = tmp1[3];
        tmp2[1] = tmp1[2];
        tmp2[2] = tmp1[1];
        tmp2[3] = tmp1[0];
        memcpy(&data[i], tmp2, 4);
        break;
      case MModBus_32bitOrder_BADC:
        memcpy(tmp1, &data[i], 4);
        tmp2[0] = tmp1[1];
        tmp2[1] = tmp1[0];
        tmp2[2] = tmp1[3];
        tmp2[3] = tmp1[2];
        memcpy(&data[i], tmp2, 4);
        break;
      case MModBus_32bitOrder_CDAB:
        memcpy(tmp1, &data[i], 4);
        tmp2[0] = tmp1[2];
        tmp2[1] = tmp1[3];
        tmp2[2] = tmp1[0];
        tmp2[3] = tmp1[1];
        memcpy(&data[i], tmp2, 4);
        break;
      default:

        break;
      }
    }
    return true;
  }
  else
    return false;
}
// ##################################################################################################
bool mmodbus_readHoldingRegister32i(uint8_t slaveAddress, uint16_t number, uint32_t *data)
{
  return mmodbus_readHoldingRegisters32i(slaveAddress, number, 1, data);
}
// ##################################################################################################
bool mmodbus_readHoldingRegisters32i(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint32_t *data)
{
  return mmodbus_readHoldingRegisters32f(slaveAddress, startnumber, length, (float *)data);
}
// ##################################################################################################
bool mmodbus_readHoldingRegister16i(uint8_t slaveAddress, uint16_t number, uint16_t *data)
{
  return mmodbus_readHoldingRegisters16i(slaveAddress, number, 1, data);
}
// ##################################################################################################
bool mmodbus_readHoldingRegisters16i(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint16_t *data)
{
  bool ret = mmodbus_readHoldingRegisters8i(slaveAddress, startnumber, length * 1, (uint8_t *)data);
  if (ret == true)
  {
    uint8_t tmp1[2], tmp2[2];
    for (uint16_t i = 0; i < length; i++)
    {
      switch (mmodbus.byteOrder16)
      {
      case MModBus_16bitOrder_AB:
        memcpy(tmp1, &data[i], 2);
        tmp2[0] = tmp1[0];
        tmp2[1] = tmp1[1];
        memcpy(&data[i], tmp2, 2);
        break;
      default:
        memcpy(tmp1, &data[i], 2);
        tmp2[0] = tmp1[1];
        tmp2[1] = tmp1[0];
        memcpy(&data[i], tmp2, 2);
        break;
      }
    }
    return true;
  }
  else
    return false;
}
// ##################################################################################################
bool mmodbus_writeCoil(uint8_t slaveAddress, uint16_t number, uint8_t data)
{
#if (_MMODBUS_RTU == 1)
  uint8_t txData[8];
  txData[0] = slaveAddress;
  txData[1] = MModbusCMD_WriteSingleCoil;
  txData[2] = (number & 0xFF00) >> 8;
  txData[3] = (number & 0x00FF);
	txData[4] = 0;
  if (data == 0)
    txData[5] = 0;
  else
    txData[5] = 0xFF;
  static uint16_t crc;
  crc = mmodbus_crc16(txData, 6);
  txData[6] = (crc & 0x00FF);
  txData[7] = (crc & 0xFF00) >> 8;
  mmodbus_sendRaw(txData, 8, 100);
  uint16_t recLen = mmodbus_receiveRaw(mmodbus.timeout);
  if (recLen == 0)
    return false;
  if (memcmp(txData, mmodbus.rxBuf, 8) == 0)
    return true;
  else
    return false;
#endif
#if (_MMODBUS_ASCII == 1)

#endif
}

// ##################################################################################################
bool mmodbus_writeHoldingRegister16i(uint8_t slaveAddress, uint16_t number, uint16_t data)
{
#if (_MMODBUS_RTU == 1)
  uint8_t txData[8];
  txData[0] = slaveAddress;
  txData[1] = MModbusCMD_WriteSingleRegister;
  txData[2] = (number & 0xFF00) >> 8;
  txData[3] = (number & 0x00FF);
  txData[4] = (data & 0xFF00) >> 8;
  txData[5] = data & 0x00FF;
  static uint16_t crc;
  crc = mmodbus_crc16(txData, 6);
  txData[6] = (crc & 0x00FF);
  txData[7] = (crc & 0xFF00) >> 8;
  mmodbus_sendRaw(txData, 8, 100);
  uint16_t recLen = mmodbus_receiveRaw(mmodbus.timeout);
  if (recLen == 0)
    return false;
  if (memcmp(txData, mmodbus.rxBuf, 8) == 0)
    return true;
  else
    return false;
#endif
#if (_MMODBUS_ASCII == 1)

#endif
}
// ##################################################################################################
bool mmodbus_writeHoldingRegisters16i(uint8_t slaveAddress, uint16_t startnumber, uint16_t length, uint16_t *data)
{
#if (_MMODBUS_RTU == 1)
  if (length == 1)
  {
    return mmodbus_writeHoldingRegister16i(slaveAddress, startnumber, data[0]);
  }
  else
  {
    uint8_t txData[7 + length * 2 + 2];
    txData[0] = slaveAddress;
    txData[1] = MModbusCMD_WriteMultipleRegisters;
    txData[2] = (startnumber & 0xFF00) >> 8;
    txData[3] = (startnumber & 0x00FF);
    txData[4] = (length & 0xFF00) >> 8;
    txData[5] = (length & 0x00FF);
    txData[6] = (length * 2);
    uint8_t tmp1[2], tmp2[2];
    for (uint16_t i = 0; i < length; i++)
    {
      switch (mmodbus.byteOrder16)
      {
      case MModBus_16bitOrder_AB:
        memcpy(tmp1, &data[i], 2);
        tmp2[0] = tmp1[1];
        tmp2[1] = tmp1[0];
        memcpy(&txData[7 + i * 2], tmp2, 2);
        break;
      default:
        memcpy(tmp1, &data[i], 2);
        tmp2[0] = tmp1[0];
        tmp2[1] = tmp1[1];
        memcpy(&txData[7 + i * 2], tmp2, 2);
        break;
      }
    }
    static uint16_t crc;
    crc = mmodbus_crc16(txData, 7 + length * 2);
    txData[7 + length * 2 + 0] = (crc & 0x00FF);
    txData[7 + length * 2 + 1] = (crc & 0xFF00) >> 8;
    mmodbus_sendRaw(txData, 7 + length * 2 + 2, 100);
    uint16_t recLen = mmodbus_receiveRaw(mmodbus.timeout);
    if (recLen == 0)
      return false;
    crc = mmodbus_crc16(txData, 6);
    txData[6] = (crc & 0x00FF);
    txData[7] = (crc & 0xFF00) >> 8;
    if (memcmp(txData, mmodbus.rxBuf, 8) == 0)
      return true;
    else
      return false;
  }
#endif
#if (_MMODBUS_ASCII == 1)

#endif
}
// ##################################################################################################