Comunicação Serial RS232 - Monitor Samsung 400MX

Olá pessoal,
para quem usa o sistema de digital signage e deseja fazer a automação/programação para ligar e desligar os monitores conectados aos mini-pcs via porta serial rs232. Esse mesmo código abaixo pode ser usado para outros tipos de Monitores, basta verificar nos manuais quais são os comandos, no meu caso o monitor aceita comandos pré-definidos pelo manual, esses comandos são em hexadecimais.


#include iostream
#include conio.h
#include stdio.h
#include time.h
#include windows.h
#include string.h
#include serial.h

// Flow control flags

#define FC_DTRDSR 0x01
#define FC_RTSCTS 0x02
#define FC_XONXOFF 0x04

// ascii definitions

#define ASCII_BEL 0x07
#define ASCII_BS 0x08
#define ASCII_LF 0x0A
#define ASCII_CR 0x0D
#define ASCII_XON 0x11
#define ASCII_XOFF 0x13

HANDLE* ptr;

using namespace std;
// variables used with the com port
BOOL bPortReady;
DCB dcb;
COMMTIMEOUTS CommTimeouts;
BOOL bWriteRC;
BOOL bReadRC;
DWORD iBytesWritten;
DWORD iBytesRead;

HANDLE SerialInit(char *ComPortName, int BaudRate)
{
char status;
DWORD dwStoredFlags;

HANDLE hCom;

hCom = CreateFile(ComPortName,
GENERIC_READ | GENERIC_WRITE,
0, // exclusive access
NULL, // no security
OPEN_EXISTING,
0, // no overlapped I/O
NULL); // null template

if (hCom == INVALID_HANDLE_VALUE)
{
printf ("CreateFile failed with error %d.\n", GetLastError());
printf("Can not open %s!!\n\n",ComPortName);
system("pause");
exit(1);
} else {
status = 1;
}

dwStoredFlags = EV_BREAK | EV_CTS | EV_DSR | EV_ERR | EV_RING |\
EV_RLSD | EV_RXCHAR | EV_RXFLAG | EV_TXEMPTY ;
if (!SetCommMask(hCom, dwStoredFlags))
printf("Can not open %s!!\n\n",ComPortName);

bPortReady = SetupComm(hCom, 2, 128); // set buffer sizes


if (bPortReady = GetCommState(hCom, &dcb))
{
dcb.BaudRate = BaudRate;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
dcb.fAbortOnError = TRUE;

// set XON/XOFF
dcb.fOutX = FALSE; // XON/XOFF off for transmit
dcb.fInX = FALSE; // XON/XOFF off for receive
// set RTSCTS
dcb.fOutxCtsFlow = FALSE; // turn on CTS flow control
dcb.fRtsControl = RTS_CONTROL_HANDSHAKE; //
// set DSRDTR
dcb.fOutxDsrFlow = FALSE; // turn on DSR flow control
//dcb.fDtrControl = DTR_CONTROL_ENABLE; //
dcb.fDtrControl = DTR_CONTROL_DISABLE; //
// dcb.fDtrControl = DTR_CONTROL_HANDSHAKE; //
} else {
printf("Erro de parametrizacao!!\n\n");
}

bPortReady = SetCommState(hCom, &dcb);

// Communication timeouts are optional

bPortReady = GetCommTimeouts (hCom, &CommTimeouts);

CommTimeouts.ReadIntervalTimeout = 5000;
CommTimeouts.ReadTotalTimeoutConstant = 5000;
CommTimeouts.ReadTotalTimeoutMultiplier = 1000;
CommTimeouts.WriteTotalTimeoutConstant = 5000;
CommTimeouts.WriteTotalTimeoutMultiplier = 1000;

bPortReady = SetCommTimeouts (hCom, &CommTimeouts);

if (status == 1){
printf("Comunicacao com a porta %s: Ok\n",ComPortName);
}

return hCom;
}

char SerialGetc(HANDLE *hCom)
{
char rxchar;
BOOL bReadRC;
static DWORD iBytesRead;

bReadRC = ReadFile(*hCom, &rxchar, 1, &iBytesRead, NULL);

return rxchar;
}

void SerialPutc(HANDLE *hCom, char txchar)
{
BOOL bWriteRC;
static DWORD iBytesWritten;
bWriteRC = WriteFile(*hCom, &txchar, 1, &iBytesWritten,NULL);
return;
}

char* SerialGets(HANDLE *hCom)
{
static char rxstring[256];
char c;
int pos = 0;

while(pos <= 255) { c = SerialGetc(hCom); if(c == '\r') continue; // discard carriage return rxstring[pos++] = c; if(c == '\n') break; } rxstring[pos] = 0; return rxstring; } void SerialPuts(HANDLE *hCom, char *txstring) { BOOL bWriteRC; static DWORD iBytesWritten; bWriteRC = WriteFile(*hCom, txstring, strlen(txstring), &iBytesWritten,NULL); } void sleep( int _wait) { clock_t goal; goal = clock() + _wait; while( goal > clock() );
}

int desliga(HANDLE *hCom)
{
if(!WriteFile(*hCom,"\xAA",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\x11",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\xFE",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\x01",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\x00",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\x10",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
}

int liga(HANDLE *hCom)
{
if(!WriteFile(*hCom,"\xAA",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\x11",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\xFE",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\x01",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\x01",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
if(!WriteFile(*hCom,"\x11",1,&iBytesWritten,NULL)) printf("Erro ao enviar comando.\n");
}



int main(int argc, char *argv[])
{
int op = atoi(argv[1]);

HANDLE my=SerialInit("com2",9600);


switch (op) {
case 1:
liga(&my);
break;
case 0:
desliga(&my);
break;
}

liga(&my);
//Fecha porta serial
printf(" %c ",SerialGetc(&my));
CloseHandle(&my);
return 0;
system("pause");
}



Arquivo Serial.h

// Flow control flags

#define FC_DTRDSR 0x01
#define FC_RTSCTS 0x02
#define FC_XONXOFF 0x04

// ascii definitions
#include stdio.h
#include time.h
#include string.h

#define ASCII_BEL 0x07
#define ASCII_BS 0x08
#define ASCII_LF 0x0A
#define ASCII_CR 0x0D
#define ASCII_XON 0x11
#define ASCII_XOFF 0x13


HANDLE SerialInit(char*, int);

char SerialGetc(HANDLE*);

void SerialPutc(HANDLE*, char);

char* SerialGets(HANDLE*);

void SerialPuts(HANDLE*, char*);

void sleep(int);