通过RS232串口将数据发送到条形码扫描器
我有一个条形码扫描仪，通过RS232串口连接。 我需要编写一个程序来将该设备与PC连接并传输数据。 我已经写了一些初始化通信链接的基本方法，并尝试通过向设备发送BEEP命令进行测试，但它没有按预期发出蜂鸣声。 所以我认为我的源代码有问题。 请有人帮我完成源代码。 以下是书面源代码
01）DeviceRS232.h
#ifndef DEVICERS232_H #define DEVICERS232_H extern "C" { #include #include #include #include #include #include #include #include #include } #include #define MAX_SERIAL_PORT_NO 30 class DeviceRS232 { public: DeviceRS232(); virtual ~DeviceRS232(); int fdRS232; // file descriptor for the serial port void setSerialPort(std::string sp); void setBaudRate(long baud); void setDataBits(int dataBit); void setStopBits(int stopBit); void setNumberOfParityBits(int nparityBits); void setDefaultAttributes(); long getBaudRate(); std::string getSerialPort(); int openSerialPort(); int readUserConfiguration(); int sendDataBuffer(const unsigned char *dataBuffer, size_t bufferSize); void closeSerialPort(); protected: std::string serialPort; // Serial port like /dev/ttyS0 long baudRate; // Scanner baud rate int dataBits; // data bits int stopBits; // stop bits int numberOfParityBits; // number of parity bits termios oldSerialPortSetting; // Current values of termios structure for /dev/ttyS0 termios newSerialPortSetting; // new termios attributes for /dev/ttyS0 private: }; #endif // DEVICERS232_H 2）DeviceRS232.cpp
#include "DeviceRS232.h" DeviceRS232::DeviceRS232() { //ctor } DeviceRS232::~DeviceRS232() { //dtor } void DeviceRS232::setSerialPort(std::string sp) { serialPort = sp; } void DeviceRS232::setBaudRate(long baud) { baudRate = baud; } void DeviceRS232::setDataBits(int dataBit) { dataBits = dataBit; } void DeviceRS232::setStopBits(int stopBit) { stopBits = stopBit; } void DeviceRS232::setNumberOfParityBits(int nparityBits) { numberOfParityBits = nparityBits; } void DeviceRS232::setDefaultAttributes() { std::string sp = "/dev/ttyS0"; long baud = 9600; int dataBit = 1; int stopBit = 1; int nparityBits = 0; setSerialPort(sp); setBaudRate(baud); setDataBits(dataBit); setStopBits(stopBit); setNumberOfParityBits(nparityBits); } long DeviceRS232::getBaudRate() { return baudRate; } std::string DeviceRS232::getSerialPort() { return serialPort; } int DeviceRS232::openSerialPort() { int fd, baudr, status, portStatus; setDefaultAttributes(); switch(getBaudRate()) { case 50 : baudr = B50; break; case 75 : baudr = B75; break; case 110 : baudr = B110; break; case 134 : baudr = B134; break; case 150 : baudr = B150; break; case 200 : baudr = B200; break; case 300 : baudr = B300; break; case 600 : baudr = B600; break; case 1200 : baudr = B1200; break; case 1800 : baudr = B1800; break; case 2400 : baudr = B2400; break; case 4800 : baudr = B4800; break; case 9600 : baudr = B9600; break; case 19200 : baudr = B19200; break; case 38400 : baudr = B38400; break; case 57600 : baudr = B57600; break; case 115200 : baudr = B115200; break; case 230400 : baudr = B230400; break; case 460800 : baudr = B460800; break; case 500000 : baudr = B500000; break; case 576000 : baudr = B576000; break; case 921600 : baudr = B921600; break; case 1000000 : baudr = B1000000; break; default : printf("invalid baudrate\n"); return(1); break; } // Open serial port fd = open(getSerialPort().c_str(), O_RDWR | O_NOCTTY | O_NDELAY); if(fd == -1) { printf("Unable to open serial port...\n"); return 1; } fdRS232 = fd; status = tcgetattr(fdRS232, &oldSerialPortSetting); if(status == -1) { close(fdRS232); printf("Unable to get serial port attributes...\n"); return 1; } memset(&newSerialPortSetting, 0, sizeof(newSerialPortSetting)); newSerialPortSetting.c_cflag = baudr | CS8 | CLOCAL | CREAD; // newSerialPortSetting.c_iflag = IGNPAR; newSerialPortSetting.c_oflag = 0; newSerialPortSetting.c_lflag = 0; newSerialPortSetting.c_cc[VMIN] = 0; newSerialPortSetting.c_cc[VTIME] = 0; status = tcsetattr(fdRS232, TCSANOW, &newSerialPortSetting); if(status==-1) { close(fdRS232); perror("unable to adjust portsettings "); return 1; } // Get the status of opened serial port if(ioctl(fdRS232, TIOCMGET, &portStatus) == -1) { perror("Unable to get port status"); return 1; } // Tern on DTR and RTS portStatus |= TIOCM_DTR; portStatus |= TIOCM_RTS; // Set the status of the port with new DTR, RTS values if(ioctl(fdRS232, TIOCMSET, &portStatus) == -1) { perror("Unable to set port status..."); return 1; } return 0; } int DeviceRS232::sendDataBuffer(const unsigned char *dataBuffer, size_t bufferSize) { return write(fdRS232, dataBuffer, bufferSize); } void DeviceRS232::closeSerialPort() { int portStatus; if(ioctl(fdRS232, TIOCMGET, &portStatus) == -1) { perror("Unable to get the port status"); } // Tern off DTR and RTS portStatus &= ~TIOCM_DTR; portStatus &= ~TIOCM_RTS; // Set the status of the port with new DTR, RTS values if(ioctl(fdRS232, TIOCMSET, &portStatus) == -1) { perror("Unable to set port status..."); } close(fdRS232); }
3）main.cpp
#include extern "C" { #include #include #include } #include "DeviceRS232.h" using namespace std; int main() { //char sendBuffer[4096] = " "; unsigned char sendBeep[] = {0x05, 0xE6, 0x04, 0x00, 0x0D, 0x00, 0x00}; unsigned char ledOn[] = {0x05, 0xE7, 0x04, 0x00, 0x0D, 0x00}; unsigned char val[7]; cout << "********************** RS232 - SSI **********************" << endl << endl; DeviceRS232 dev_rs232; dev_rs232.setDefaultAttributes(); dev_rs232.openSerialPort(); //---------------------------------------------------- //for(int x=0; x 0) { printf("Data sent: %d...\n", sizeSent); } sleep(10); dev_rs232.closeSerialPort(); cout << "*********************************************************" << endl; return 0; }
unsigned char sendBeep[] = {0x05, 0xE6, 0x04, 0x00, 0x0D, 0x00, 0x00}; 考虑到条形设备的串行端口通信协议规范。
（编辑添加输出）输出：
********************** RS232 - SSI ********************** Data sent: 7... ********************************************************* Process returned 0 (0x0) execution time : 10.006 s Press ENTER to continue.
欢迎提供所有帮助和建议。 谢谢。
#include extern "C" { #include #include #include } #include "DeviceRS232.h" using namespace std; int main() { unsigned char sendBuffer[4096] = "Test test test..."; unsigned char sendBeep[] = {0x05, 0xE6, 0x04, 0x00, 0x11, 0x46, 0x00}; unsigned char ledOn[] = {0x05, 0xE7, 0x04, 0x00, 0x0D, 0x00}; unsigned char val[7]; //------------------------------------------------------------------------- unsigned char commonBuffer[257]; int iChecksum; int i; commonBuffer[ 1 ] = (unsigned char)0xC6; commonBuffer[ 2 ] = (unsigned char)0x04; commonBuffer[ 3 ] = (unsigned char)0x08; // Permanant Chnage commonBuffer[ 4 ] = (unsigned char)0x11; // Beep after setting. FF for No Beep commonBuffer[ 5 ] = (unsigned char)0xEE; // Decorder parameter to set (238) commonBuffer[ 6 ] = (unsigned char)0x01; // Value to set commonBuffer[ 0 ] = (unsigned char)0x07; // Length iChecksum = 0; for (i = 0; i < 7; i++) { iChecksum += commonBuffer[i]; } commonBuffer[i++] = (char)(((-iChecksum) >> 8) & 0xFF); // Add Checksum into the command commonBuffer[i++] = (char)((-iChecksum) & 0xFF); //------------------------------------------------------------------------- cout << "********************** RS232 - SSI **********************" << endl << endl; DeviceRS232 dev_rs232; dev_rs232.setDefaultAttributes(); dev_rs232.openSerialPort(); //---------------------------------------------------- //for(int x=0; x<10; x++) //{ // dev_rs232.sendDataBuffer(sendBeep, sizeof(sendBeep)); //} //---------------------------------------------------- int sizeSent = dev_rs232.sendDataBuffer(commonBuffer, sizeof(commonBuffer)); if( sizeSent > 0) { printf("Data sent: %d...\n", sizeSent); } sleep(1); dev_rs232.closeSerialPort(); cout << "*********************************************************" << endl; return 0; }