roboforum.ru

#include <pic.h>

void transmit(unsigned char byte) {
    while(!TXIF) continue;  
    TXREG= byte; 
} 

void main(void) {
    SPBRG= 2; //4MHz, 19200
    BRGH=  0; //4MHz, 19200
    SYNC=  0;
    SPEN=  1;
    TXIE=  0;
    TX9=   0;
    TXEN=  1;
    GIE=   0;
    PEIE=  0;
    
    
    TRISB= 0;
    PORTB= 0;
    RCREG= 0;

    while (1) {
        transmit(50);
    };
}

//______________________________________________________tcom_port___________________________________________________________
//--------------------------------------------------------------------------------------------------------------------------
class tcom_port {
    HANDLE       hcom_;
    COMMTIMEOUTS commTimeOuts_;
    DCB          portDcb_;
    static const char* pdefault_name;
    char*       pname;
public:
   tcom_port();

   bool open();
   void close();
    bool set_baud_rate(const int nrate);
   bool write(const char* pbuffer, int length);
   bool read (const char* pbuffer, int length, int* pnread);

   ~tcom_port();
};

const char* tcom_port::pdefault_name= "COM1";

//_____________________________________
tcom_port::tcom_port(): hcom_(NULL), pname((char*)pdefault_name) {
    commTimeOuts_.ReadIntervalTimeout=         1;
    commTimeOuts_.ReadTotalTimeoutMultiplier=  1;
    commTimeOuts_.ReadTotalTimeoutConstant=    1;
    commTimeOuts_.WriteTotalTimeoutMultiplier= 1;
    commTimeOuts_.WriteTotalTimeoutConstant=   1;
    memset(&portDcb_, 0, sizeof(portDcb_)); portDcb_.DCBlength=sizeof(portDcb_);

};
//_____________________________________
bool tcom_port::open() {
   hcom_ = CreateFileA(pname, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,NULL);
    if ( hcom_==INVALID_HANDLE_VALUE )             return false;
    if ( !SetCommTimeouts(hcom_, &commTimeOuts_) ) return false;
    if ( !GetCommState(hcom_, &portDcb_) )         return false;
    return true;
};
//_____________________________________
void tcom_port::close() {
    if (hcom_) { CloseHandle(hcom_); hcom_= NULL; };
};
//_____________________________________
bool tcom_port::set_baud_rate(const int nrate) {
    if ( !GetCommState(hcom_, &portDcb_) ) return false;
    portDcb_.BaudRate= nrate;
    if ( !SetCommState(hcom_, &portDcb_) ) return false;
    return true;
};
//_____________________________________
bool tcom_port::write(const char* pbuffer, int length) {
   DWORD dwWritten= 0;
   if ( !WriteFile(hcom_, (void*)pbuffer, length, &dwWritten, NULL) ) return false;
   return dwWritten==length;
};
//_____________________________________
bool tcom_port::read (const char* pbuffer, int length, int* pnread) {
    if ( !ReadFile(hcom_, (void*)pbuffer, length, (DWORD*)pnread, NULL) ) return false;
    return true;
};
//_____________________________________
tcom_port::~tcom_port() {
   if (hcom_) CloseHandle(hcom_);
};


//__________________________________________________________________________________________________________________________
//--------------------------------------------------------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE, HINSTANCE, LPSTR, INT ) {
    char value1= 8;
    char read_value= 100;
    int nread= 0;

    tcom_port com_port;
    com_port.open();
    com_port.set_baud_rate(19200);
    while (true ) {
        while ( nread==0 ) com_port.read(&read_value, 1, &nread);;
    };

   return 0;
};
//__________________________________________________________________________________________________________________________
//--------------------------------------------------------------------------------------------------------------------------