人工智能-项目实践-嵌入式-针对嵌入式处理器AT命令解析框架.zip

#include "serial.h" #include <errno.h> #include <termios.h> #define FALSE -1 #define TRUE 0 /** *@brief 设置串口通信速率 *@param fd 类型 int 打开串口的文件句柄 *@param speed 类型 int 串口速度 *@return void */ int speed_arr[] = {B921600, B115200, B38400, B19200, B9600, B4800, B2400, B1200, B300, B38400, B19200, B9600, B4800, B2400, B1200, B300, }; int name_arr[] = {921600, 115200, 38400, 19200, 9600, 4800, 2400, 1200, 300, 38400, 19200, 9600, 4800, 2400, 1200, 300, }; void serial_baud(int fd, int speed){ int i; int status; struct termios Opt; tcgetattr(fd, &Opt); for ( i= 0; i < sizeof(speed_arr) / sizeof(int); i++) { if (speed == name_arr[i]) { tcflush(fd, TCIOFLUSH); cfsetispeed(&Opt, speed_arr[i]); cfsetospeed(&Opt, speed_arr[i]); status = tcsetattr(fd, TCSANOW, &Opt); if (status != 0) { TRACE_ERROR("tcsetattr fd\n"); return; } tcflush(fd,TCIOFLUSH); break; } } } /** *@brief 设置串口数据位，停止位和效验位 *@param fd 类型 int 打开的串口文件句柄 *@param databits 类型 int 数据位 取值 为 7 或者8 *@param stopbits 类型 int 停止位 取值为 1 或者2 *@param parity 类型 int 效验类型 取值为N,E,O,,S */ uint32_t serial_config(int fd,int databits,int stopbits,int parity) { struct termios options; if ( tcgetattr( fd,&options) != 0) { TRACE_ERROR("SetupSerial 1\n"); return(FALSE); } options.c_cflag &= ~CSIZE; switch (databits) /*设置数据位数*/ { case 7: options.c_cflag |= CS7; break; case 8: options.c_cflag |= CS8; break; default: TRACE_ERROR("Unsupported data size\n"); return (FALSE); } /*设置校验位*/ switch (parity) { case 'n': case 'N': options.c_cflag &= ~PARENB; /* Clear parity enable */ options.c_iflag &= ~INPCK; /* Enable parity checking */ break; case 'o': case 'O': options.c_cflag |= (PARODD | PARENB); /* 设置为奇效验*/ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'e': case 'E': options.c_cflag |= PARENB; /* Enable parity */ options.c_cflag &= ~PARODD; /* 转换为偶效验*/ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'S': case 's': /*as no parity*/ options.c_cflag &= ~PARENB; options.c_cflag &= ~CSTOPB;break; default: TRACE_ERROR("Unsupported parity\n"); return (FALSE); } /* 设置停止位*/ switch (stopbits) { case 1: options.c_cflag &= ~CSTOPB; break; case 2: options.c_cflag |= CSTOPB; break; default: TRACE_ERROR("Unsupported stop bits\n"); return (FALSE); } /* Set input parity option */ if (parity != 'n') options.c_iflag |= INPCK; tcflush(fd,TCIFLUSH); options.c_cc[VTIME] =10; /* 设置超时1 seconds*/ options.c_cc[VMIN] = 0; /* Update the options and do it NOW */ /* struct termio newtio; */ options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); /*Input*/ options.c_oflag &= ~OPOST; /*Output*/ if (tcsetattr(fd,TCSANOW,&options) != 0) { TRACE_ERROR("SetupSerial 3 \n"); return (FALSE); } return (TRUE); } uint32_t serial_open(char *Dev) { int fd = open( Dev, O_RDWR| O_NOCTTY | O_NDELAY ); //| O_NOCTTY | O_NDELAY // fcntl(fd,F_SETFL,FNDELAY); if (-1 == fd) { strerror(errno); TRACE_ERROR("Can't Open Serial Port error:%d \n",errno); if (errno == EEXIST ) { TRACE("EEXIST 参数pathname 所指的文件已存在, 却使用了O_CREAT 和O_EXCL 旗标. \r\n"); }else if(errno == EACCES) { TRACE("EACCESS 参数pathname 所指的文件不符合所要求测试的权限.\r\n"); }else if(errno == EROFS) { TRACE("EROFS 欲测试写入权限的文件存在于只读文件系统内.\r\n"); } return -1; } return fd; } int serial_read(int fd, void *data, uint32_t expect_size, uint32_t timeout) { int32_t read_num=0,num=0; memset(data,0,expect_size); uint32_t start_time=millis(); if(timeout==0) { num = read(fd, data, expect_size); read_num=(num==-1)?0:num; // read_num=(errno==0)?-1:read_num; return read_num; } while(read_num<expect_size){ num = read(fd, data+read_num, expect_size); if(num<0){ num= 0; } read_num +=num; if(millis()>start_time+timeout){ break; } } return read_num; } uint32_t serial_write(int fd,void *data, uint32_t size, uint32_t timeout) { return write(fd, data, size); }