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 通过对单个字符输入的拼接暂存，实现对字符串的比较控制灯的亮灭

char buf[32];char temp[32];while (1){printf("start\n\r");memset(temp,0, sizeof(temp));memset(buf,0, sizeof(buf));while(temp[0] !='\r'){memset(temp,0, sizeof(temp));HAL_UART_Receive(&huart1,(uint8_t*)temp,1, 10000);printf("temp::%c\n\r", temp[0]);strcat(buf, temp);}LED_on_off(buf);

 

int LED_on_off(char *buf)
{printf("buf::%s\n\r", buf);if(strncmp(buf,"LED_ON", 6)==0)//LED_ON{HAL_GPIO_WritePin(GPIOC, GPIO_PIN_4, GPIO_PIN_SET);printf("LED_ON\n\r");return 1;}else if(strncmp(buf,"LED_OFF", 7)==0)//LED_OFF{HAL_GPIO_WritePin(GPIOC, GPIO_PIN_4, GPIO_PIN_RESET);printf("LED_OFF\n\r");return 1;}else//不是led灯的打开或者熄灭{printf("errorLED\n\r");return 0;}