字符串在stm32串口中的应用

    串口控制流水灯

pc通过串口发送字符串命令控制流水灯

           open  流水灯打开

          close  流水灯关闭

        speed 1~9速度控制

if(strcmp((char *)usart1_rec_buff,"open")==0)

{

        led_flag =1;

}

else if(strcmp((char *)usart1_rec_buff,"close")==0)

{

        led_flag =0;

        led_all_off();

}

else if(strcmp((char *)usart1_rec_buff,"sp1")>=0 && strcmp((char *)usart1_rec_buff,"sp9")<=0 && led_flag && strlen((char *)usart_rec_buff)==3)//led_flag开机调速strcmp比1-9ascall码

{

        speed =usart1_rec_buff[2]-48;//字符-48变成数组

}