1 #include <stdio.h> /**//*标准输入输出定义*/ 2 #include <stdlib.h> /**//*标准函数库定义*/ 3 #include <unistd.h> /**//*Unix标准函数定义*/ 4 #include <sys/types.h> /**//**/ 5 #include <sys/stat.h> /**//**/ 6 #include <fcntl.h> /**//*文件控制定义*/ 7 #include <termios.h> /**//*PPSIX终端控制定义*/ 8 #include <errno.h> /**//*错误号定义*/ 9 10 11 12 /**//***@brief 设置串口通信速率 13 *@param fd 类型 int 打开串口的文件句柄 14 *@param speed 类型 int 串口速度 15 *@return void 16 */ 17 int speed_arr[] = { B38400, B19200, B9600, B4800, B2400, B1200, B300, 18 B38400, B19200, B9600, B4800, B2400, B1200, B300, }; 19 int name_arr[] = {38400, 19200, 9600, 4800, 2400, 1200, 300, 20 38400, 19200, 9600, 4800, 2400, 1200, 300, }; 21 22 void CES_OpenDoor::set_speed(int fd, int speed) 23  { 24 int i; 25 int status; 26 struct termios Opt; 27 tcgetattr(fd, &Opt); 28 for ( i= 0; i < sizeof(speed_arr) / sizeof(int); i++) 29 { 30 if (speed == name_arr[i]) 31 { 32 tcflush(fd, TCIOFLUSH); 33 cfsetispeed(&Opt, speed_arr[i]); 34 cfsetospeed(&Opt, speed_arr[i]); 35 status = tcsetattr(fd, TCSANOW, &Opt); 36 if (status != 0) 37 ESLOG_debug("[CES_OpenDoor::set_speed] tcsetattr fd1"); 38 return; 39 } 40 tcflush(fd,TCIOFLUSH); 41 } 42 } 43 44 /**//** 45 *@brief 设置串口数据位,停止位和效验位 46 *@param fd 类型 int 打开的串口文件句柄* 47 *@param databits 类型 int 数据位 取值 为 7 或者8* 48 *@param stopbits 类型 int 停止位 取值为 1 或者2* 49 *@param parity 类型 int 效验类型 取值为N,E,O,,S 50 */ 51 int CES_OpenDoor::set_Parity(int fd,int databits,int stopbits,int parity) 52  { 53 struct termios options; 54 if ( tcgetattr( fd,&options) != 0) 55 { 56 ESLOG_debug("[CES_OpenDoor::set_Parity] tcgetattr() 1"); 57 return(FALSE); 58 } 59 options.c_cflag &= ~CSIZE; 60 switch (databits) /**//*设置数据位数*/ 61 { 62 case 7: 63 options.c_cflag |= CS7; 64 break; 65 case 8: 66 options.c_cflag |= CS8; 67 break; 68 default: 69 ESLOG_debug("[CES_OpenDoor::set_Parity] Unsupported data size\n"); 70 return (FALSE); 71 } 72 73 switch (parity) 74 { 75 case 'n': 76 case 'N': 77 options.c_cflag &= ~PARENB; /**//* Clear parity enable */ 78 options.c_iflag &= ~INPCK; /**//* Enable parity checking */ 79 break; 80 case 'o': 81 case 'O': 82 options.c_cflag |= (PARODD | PARENB); /**//* 设置为奇效验*/ 83 options.c_iflag |= INPCK; /**//* Disnable parity checking */ 84 break; 85 case 'e': 86 case 'E': 87 options.c_cflag |= PARENB; /**//* Enable parity */ 88 options.c_cflag &= ~PARODD; /**//* 转换为偶效验*/ 89 options.c_iflag |= INPCK; /**//* Disnable parity checking */ 90 break; 91 case 'S': 92 case 's': /**//*as no parity*/ 93 options.c_cflag &= ~PARENB; 94 options.c_cflag &= ~CSTOPB; 95 break; 96 default: 97 ESLOG_debug("[CES_OpenDoor::set_Parity] Unsupported parity\n"); 98 return (FALSE); 99 } 100 /**//* 设置停止位*/ 101 switch (stopbits) 102 { 103 case 1: 104 options.c_cflag &= ~CSTOPB; 105 break; 106 case 2: 107 options.c_cflag |= CSTOPB; 108 break; 109 default: 110 ESLOG_debug("[CES_OpenDoor::set_Parity] Unsupported stop bits\n"); 111 return (FALSE); 112 } 113 114 /**//* Set input parity option */ 115 if (parity != 'n') 116 options.c_iflag |= INPCK; 117 118 options.c_cc[VTIME] = 150; // 15 seconds 119 options.c_cc[VMIN] = 0; 120 tcflush(fd,TCIFLUSH); /**//* Update the options and do it NOW */ 121 if (tcsetattr(fd,TCSANOW,&options) != 0) 122 { 123 ESLOG_debug("[CES_OpenDoor::set_Parity] tcsetattr) ; 124 return (FALSE); 125 } 126 return (TRUE); 127 } 128 /**//** 129 *@breif 打开串口 130 */ 131 int CES_OpenDoor::OpenDev(char *Dev) 132  { 133 n_fd_com = open( Dev, O_RDWR ); //| O_NOCTTY | O_NDELAY 134 if (-1 == n_fd_com) 135 { /**//*设置数据位数*/ 136 ESLOG_debug("[CES_OpenDoor::OpenDev] Can't Open Serial Port"); 137 return n_fd_com; 138 } 139 else 140 { 141 set_speed(n_fd_com,19200); 142 if (set_Parity(n_fd_com,8,1,'N')== FALSE) 143 { 144 ESLOG_debug("[CES_OpenDoor::OpenDev] Set Parity Error\n"); 145 } 146 return n_fd_com; 147 } 148 }
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