void SendCmd(WORD wDevID, BYTE wCmdOrAck, int nParam)
{
CMD_PKT pkt = new CMD_PKT();
BYTE[] pktBuffer = new BYTE[12];
pkt.Head1 = (BYTE)COMMAND_START_CODE1;
pkt.Head2 = (BYTE)COMMAND_START_CODE2;
pkt.wDevId0 = (byte)(wDevID & 0xFF);
pkt.wDevId1 = (byte)(wDevID >> 8);
pkt.nParam0 = (byte)(nParam & 0xFF);
pkt.nParam1 = (byte)((nParam & 0xFF00) >> 8);
pkt.nParam2 = (byte)((nParam & 0xFF0000) >> 16);
pkt.nParam3 = (byte)((nParam & 0xFF000000) >> 24);
pkt.wCmd0 = wCmdOrAck;
pkt.wCmd1 = 0x00;
WORD chksum = CalcChkSumOfCmd(ref pkt);
pkt.wChkSum0 = (byte)(chksum % 256);
pkt.wChkSum1 = (byte)(chksum >> 8);
pktBuffer = PktToByteArray(ref pkt);
serial.Write(pktBuffer, 0, PKT_SIZE);
}
WORD CalcChkSumOfCmd(ref CMD_PKT pPkt)
{
WORD wChkSum = 0;
BYTE[] Buf = PktToByteArray(ref pPkt);
int i;
for (i = 0; i < (PKT_SIZE - CHK_SUM_SIZE); i++)
{
wChkSum += Buf[i];
}
return(wChkSum);
}
CMD_PKT ByteArrayToPkt(ref BYTE[] arr)
{
CMD_PKT package = new CMD_PKT();
package.Head1 = arr[0];
package.Head2 = arr[1];
package.wDevId0 = arr[2];
package.wDevId1 = arr[3];
package.nParam0 = arr[4];
package.nParam1 = arr[5];
package.nParam2 = arr[6];
package.nParam3 = arr[7];
package.wCmd0 = arr[8];
package.wCmd1 = arr[9];
package.wChkSum0 = arr[10];
package.wChkSum1 = arr[11];
return(package);
}
BYTE[] PktToByteArray(ref CMD_PKT package)
{
byte[] arr = new byte[12]; // 12 = sizeof(CMD_PKT)
arr[0] = package.Head1;
arr[1] = package.Head2;
arr[2] = package.wDevId0;
arr[3] = package.wDevId1;
arr[4] = package.nParam0;
arr[5] = package.nParam1;
arr[6] = package.nParam2;
arr[7] = package.nParam3;
arr[8] = package.wCmd0;
arr[9] = package.wCmd1;
arr[10] = package.wChkSum0;
arr[11] = package.wChkSum1;
return(arr);
}