做一个 USB 提醒器

#define BEEPERPIN 34
#define LEDPIN 15
        
#define TX(LedColor) {\
                  if (((LedColor)&0x80)==0) {\
                       XdigitalWriteFast(1,5,HIGH);\
                       (LedColor)=(LedColor)<<1;\
                       XdigitalWriteFast(1,5,LOW);\
                       XdigitalWriteFast(1,5,LOW);\
                       XdigitalWriteFast(1,5,LOW);\
                   }else{\
                       XdigitalWriteFast(1,5,HIGH);\
                       XdigitalWriteFast(1,5,HIGH);\
                       XdigitalWriteFast(1,5,HIGH);\
                       XdigitalWriteFast(1,5,HIGH);\
                       XdigitalWriteFast(1,5,HIGH);\
                       XdigitalWriteFast(1,5,HIGH);\
                       XdigitalWriteFast(1,5,HIGH);\                       
                       (LedColor)=(LedColor)<<1;\
                       XdigitalWriteFast(1,5,LOW);\
                       XdigitalWriteFast(1,5,LOW);\
                       XdigitalWriteFast(1,5,LOW);\
                       XdigitalWriteFast(1,5,LOW);\
                       XdigitalWriteFast(1,5,LOW);\
                       }\
                  }

#ifndef USER_USB_RAM
#error "This example needs to be compiled with a USER USB setting"
#endif

#include "src/userUsbCdc/USBCDC.h"

void setup() {
  // 设置蜂鸣器Pin 为Low (停止发声)
  pinMode(BEEPERPIN,OUTPUT);
  digitalWrite(BEEPERPIN,LOW);
  // 设置LED 控制Pin
  pinMode(LEDPIN,OUTPUT);
  digitalWrite(LEDPIN,LOW);  
  USBInit();
}

byte Status=0;
byte RValue,GValue,BValue;
byte THigh=0,TLow=0;
unsigned long CounterDown=0xFFFFFFFF;

void loop() {
  while (USBSerial_available()) {
    // 接收来自USB串口的字符
    char serialChar = USBSerial_read();
  if ((serialChar == '[')&&(Status==0)) { Status=1; continue;}
      if ((serialChar == 'c')&&(Status==1)) {Status=2; continue;}
      if (Status==2) {RValue=serialChar; Status=3; continue;}
      if (Status==3) {GValue=serialChar; Status=4; continue;}
      if (Status==4) {BValue=serialChar; Status=5; continue;}
      if (Status==5) {
          if (serialChar == ']') {Status=6;continue;}
          else {Status=0; continue;}
      }
      if ((serialChar == 'b')&&(Status==1)) {Status=7; continue;}
      if (Status==7) {THigh=serialChar; Status=8; continue;}
      if (Status==8) {TLow=serialChar; Status=9; continue;}
      if (Status==9) {
          if (serialChar == ']') {Status=10; continue;}
          else {
                // 如果最后收到的字符不是 [ 那么需要重新开始
                Status=0; continue;
          }
      }
  } 

  // 根据收到的 cRGB 设置 LED 颜色
  if (Status==6) {

    USBSerial_println_s("RGB");
    USBSerial_println_i(RValue);
    USBSerial_println_i(GValue);
    USBSerial_println_i(BValue);
    USBSerial_flush();

    // 设置 WS2812 颜色, 特别注意这里和时许非常相关，具体数值都是示波器测量取得
    //Send Green value from Bit7 to 0
    TX(GValue);TX(GValue);TX(GValue);TX(GValue);TX(GValue);TX(GValue);TX(GValue);TX(GValue);
    //Send Red value from Bit7 to 0
    TX(RValue);TX(RValue);TX(RValue);TX(RValue);TX(RValue);TX(RValue);TX(RValue);TX(RValue);
    //Send Blue value from Bit7 to 0
    TX(BValue);TX(BValue);TX(BValue);TX(BValue);TX(BValue);TX(BValue);TX(BValue);TX(BValue);  
    
   // 重新设置为状态 0
    Status=0;
  }
  
  // 根据设置的延时开始倒计时
  if (Status==10) {
    if ((THigh==0)&&(TLow==0)) {
        digitalWrite(BEEPERPIN,LOW);
      }
        // 设置触发时间
    else CounterDown=(THigh*256+TLow)*1000UL+millis();
    Status=0;
  }

   // 如果当前处于状态 0 并且设置的触发时间小于当前时间，那么就开始响
   if ((Status==0)&&(CounterDown<millis())) {
      // 对应 Pin 拉高，蜂鸣器开始发声
      digitalWrite(BEEPERPIN,HIGH);
      // 拉高之后会一直发声
      CounterDown=0xFFFFFFFF;
   }
}