智能家居项目资料.zip

#include "serial.h" static int fd_uart; static pthread_t pid; /** * 初始化串口/dev/ttyUSB0 * @return 0成功 -1失败 */ int init_usb() { struct termios options; //打开串口设备 fd_uart = open("/dev/ttyUSB0", O_RDWR); if(fd_uart < 0){ perror("open err"); return -1; } //设置串口属性 tcgetattr(fd_uart, &options); options.c_cflag |= ( CLOCAL | CREAD ); options.c_cflag &= ~CSIZE; options.c_cflag &= ~CRTSCTS; options.c_cflag |= CS8; options.c_cflag &= ~CSTOPB; options.c_iflag |= IGNPAR; options.c_iflag &= ~(ICRNL | IXON); options.c_oflag = 0; options.c_lflag = 0; cfsetispeed(&options, B115200); cfsetospeed(&options, B115200); tcsetattr(fd_uart, TCSANOW, &options); return 0; } static float dota_atof (char unitl) { if (unitl > 100) { return unitl / 1000.0; } else if (unitl > 10) { return unitl / 100.0; } else { return unitl / 10.0; } } static int dota_atoi (const char *cDecade) { int result = 0; if (' ' != cDecade[0]) { result = (cDecade[0] - 48) * 10; } result += cDecade[1] - 48; return result; } static float dota_adc (unsigned int ratio) { return ((ratio * 3.3) / 1024); } void *pthread_serial (void *arg) { struct env_info envinfo; int ret; while(1){ ret = read(fd_uart, &envinfo, sizeof(struct env_info)); if(ret != sizeof(envinfo)){ continue; } env_msg.x = envinfo.x; env_msg.y = envinfo.y; env_msg.z = envinfo.z; env_msg.temperature = envinfo.temp[0] + dota_atof(envinfo.temp[1]); env_msg.humidity = envinfo.hum[0] + dota_atof(envinfo.hum[1]); env_msg.ill = envinfo.ill; env_msg.bet = dota_adc(envinfo.bet); env_msg.adc = dota_adc(envinfo.adc); raise(DATA_ARRIVE); } } int start_recv() { return pthread_create(&pid, NULL, pthread_serial, NULL); } /** * @brief 等待串口线程 * @return */ int wait_recv() { return pthread_join(pid, NULL); } void led_control(int on) { uint8_t cmd; if(on){ cmd = LED_ON; }else{ cmd = LED_OFF; } write(fd_uart, &cmd, 1); } void beep_control(int on) { uint8_t cmd; if(on){ cmd = BEEP_ON; }else{ cmd = BEEP_OFF; } write(fd_uart, &cmd, 1); } void fan_control(int speed) { uint8_t cmd; switch(speed){ case 0: cmd = FAN_OFF; break; case 1: cmd = FAN_1; break; case 2: cmd = FAN_2; break; case 3: cmd = FAN_3; break; default: break; } write(fd_uart, &cmd, 1); }