How Do I Loop This Automatically? Byte F0 At 200Bps And 5Bytes At 10400? All Should Go In A Looop ? How To Implement It?

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C

Windows

API

serialization

, +

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <dos.h>
#include<process.h>


int main()
{

// Defining hexadecimal bytes to be sent a 200 bps for generation of low high sequence//
unsigned char bytes_to_send[1];
bytes_to_send[0] = 0xF0; /* 11110000b */
unsigned char databytes_send[5];
databytes_send[0] = 0x81;
databytes_send[1] = 0x11;
databytes_send[2] = 0xF1;
databytes_send[3] = 0x11;
databytes_send[4] = 0x04;


// Declare variables and structures//
HANDLE hSerial;
DCB dcbSerialParams = {0};
COMMTIMEOUTS timeouts = {0};

// Open the available serial port number//
fprintf(stderr, "Opening serial port...");
hSerial = CreateFile(
"COM4", GENERIC_READ|GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
if (hSerial == INVALID_HANDLE_VALUE)
{
fprintf(stderr, "Check for port connections\n");
return 1;
}
else
fprintf(stderr, "OK\n");
// Set device parameters (200 baud, 1 start bit,
// 1 stop bit, no parity)
dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
if (GetCommState(hSerial, &dcbSerialParams) == 0)
{
fprintf(stderr, "Error getting device state\n");
CloseHandle(hSerial);
return 1;
}

// Set baudrate to send bytes at 200 bps//
dcbSerialParams.BaudRate = 200;
dcbSerialParams.ByteSize = 8;
dcbSerialParams.StopBits = ONESTOPBIT;
dcbSerialParams.Parity = NOPARITY;
if(SetCommState(hSerial, &dcbSerialParams) == 0)
{
fprintf(stderr, "Error setting device parameters\n");
CloseHandle(hSerial);
return 1;
}

// Set COM port timeout settings//
timeouts.ReadIntervalTimeout = 00;
timeouts.ReadTotalTimeoutConstant = 00;
timeouts.ReadTotalTimeoutMultiplier = 00;
timeouts.WriteTotalTimeoutConstant = 00;
timeouts.WriteTotalTimeoutMultiplier = 00;
if(SetCommTimeouts(hSerial, &timeouts) == 0)
{
fprintf(stderr, "Error setting timeouts\n");
CloseHandle(hSerial);
return 1;
}

// Send specified text (remaining command line arguments)
DWORD bytes_written = 0;
fprintf(stderr, "sending bytes...\n");

while(1)
{


//Transmit slow initialization data
if (!ReadFile(hSerial, bytes_to_send, 1,&bytes_written, NULL))

// break;

fprintf(stderr, "%d bytes written\n", bytes_written);

//check for key press event
if (GetPressedKey())
break;
}

// Set baudrate to send bytes at 10400 bps 8 N 1//

dcbSerialParams.BaudRate = 10400;
dcbSerialParams.ByteSize = 8;
dcbSerialParams.StopBits = ONESTOPBIT;
dcbSerialParams.Parity = NOPARITY;
if(SetCommState(hSerial, &dcbSerialParams) == 0)
{
fprintf(stderr, "Error setting device parameters\n");
CloseHandle(hSerial);
return 1;
}

// Set COM port timeout settings//
timeouts.ReadIntervalTimeout = 00;
timeouts.ReadTotalTimeoutConstant = 00;
timeouts.ReadTotalTimeoutMultiplier = 00;
timeouts.WriteTotalTimeoutConstant = 00;
timeouts.WriteTotalTimeoutMultiplier = 00;
if(SetCommTimeouts(hSerial, &timeouts) == 0)
{
fprintf(stderr, "Error setting timeouts\n");
CloseHandle(hSerial);
return 1;
}

while(1)
{


//Transmit fast initialization data
if (!WriteFile(hSerial, databytes_send, 5, &bytes_written, NULL))

// break;

fprintf(stderr, "%d bytes written\n", bytes_written);

break;
}

CloseHandle(hSerial);

if(!WriteFile(hSerial, bytes_written,6, &bytes_written, NULL))

{
fprintf(stderr, "End of transmission\n");
CloseHandle(hSerial);

return 1;
}
fprintf(stderr, "%d bytes written\n", bytes_written);

// Close serial port
fprintf(stderr, "Closing serial port...");
if (CloseHandle(hSerial) == 0)
{
fprintf(stderr, "Error\n");
return 1;
}
fprintf(stderr, "OK\n");

// exit normally
return 0;
}