#include <Wire.h>
#include <TM1650.h>
#include <SPI.h>
unsigned long TimeTotle = 0;
unsigned long timebegin;
TM1650 d;
#define SW_PIN 1 //重置TIMEER
#define FRAM_CS 10
#define FRAM_ADDR_TIME 0x0000  // 时间存储地址，0x0000 – 0x1FFF
#define FRAM_WREN 0x06      // 使能
#define FRAM_READ 0x03     // 读操作
#define FRAM_WRITE 0x02    // 写操作
#define FRAM_WRDI  0x04    //失能
#define FRAM_RDSR  0x05    //读状态
#define FRAM_WRSR  0x01    //写状态

//片选拉低，开始SPI
inline void framSelect()
{ 
  SPI.beginTransaction(SPISettings(8000000, MSBFIRST, SPI_MODE0));
  digitalWrite(FRAM_CS, LOW); 
}
//片选拉高，结束SPI
inline void framDeselect()
{ 
  digitalWrite(FRAM_CS, HIGH); 
  SPI.endTransaction();
}
//写使能，在执行写操作前必须调用
inline void framWriteEnable()
{ 
  framSelect(); 
  SPI.transfer(FRAM_WREN); 
  framDeselect(); 
}

uint8_t framReadStatus() 
{
  framSelect();
  SPI.transfer(FRAM_RDSR);
  uint8_t s = SPI.transfer(0x00);
  framDeselect();
  return s;
}
void framWriteStatus(uint8_t s) 
{
  framWriteEnable();
  framSelect();
  SPI.transfer(FRAM_WRSR);
  SPI.transfer(s);
  framDeselect();
}
void framWriteDisable() 
{
  framSelect();
  SPI.transfer(FRAM_WRDI);
  framDeselect();
}
// 确保可写（不需要保护时清零SR），放在 SPI.begin 与片选初始化之后调用一次 ensureFramWritable() ，即可确认未被保护。
void ensureFramWritable() {
  uint8_t sr = framReadStatus();
  // 若不需要任何块保护，统一清零
  if (sr != 0x00) {
    framWriteStatus(0x00);
  }
  framWriteDisable();
}


//读操作
//addr：读取地址（16位）
//返回：读取的32位数据（大端序）
uint32_t framRead32(uint16_t addr)
{
  framSelect();                                       // 片选拉低，开始SPI
  SPI.transfer(FRAM_READ);                          // 发送读操作指令
  SPI.transfer((addr >> 8) & 0xFF);                // 发送高8位地址
  SPI.transfer(addr & 0xFF);                      // 发送低8位地址  
  uint32_t v = 0;
  v |= ((uint32_t)SPI.transfer(0x00)) << 24;      // 接收高8位数据
  v |= ((uint32_t)SPI.transfer(0x00)) << 16;      // 接收次高8位数据
  v |= ((uint32_t)SPI.transfer(0x00)) << 8;       // 接收次低8位数据
  v |= ((uint32_t)SPI.transfer(0x00));            // 接收低8位数据  
  framDeselect();                                   // 片选拉高，结束SPI
  return v;                                       // 返回读取到的32位数据（大端序）
}
//写操作
//addr：写入地址（16位）
//val：写入的数据（32位）
void framWrite32(uint16_t addr, uint32_t val)
{
  framWriteEnable();
  framSelect();                                         // 片选拉低，开始SPI
  SPI.transfer(FRAM_WRITE);                        // 发送写操作指令
  SPI.transfer((addr >> 8) & 0xFF);                // 发送高8位地址
  SPI.transfer(addr & 0xFF);                      // 发送低8位地址  
  SPI.transfer((val >> 24) & 0xFF);               // 发送高8位数据
  SPI.transfer((val >> 16) & 0xFF);               // 发送次高8位数据
  SPI.transfer((val >> 8) & 0xFF);                // 发送次低8位数据
  SPI.transfer(val & 0xFF);                      // 发送低8位数据 
  framDeselect();                                     // 片选拉高，结束SPI
}

TickType_t xLastWakeTime;
  const TickType_t xFrequency = 1000; 
  bool flashdot=true;
  //显示自定义4字符
  //a：长度为4的字符数组，按从右到左显示
  //dot：小数点位置索引
  void showtime(char a[4],int dot=1)
{
  char b[4];
  for (size_t i = 0; i < 4; i++)
  {
    b[i]=a[3-i];
    /* code */
  }
  d.displayString(b);
   d.setDot(dot,flashdot);
   flashdot=!flashdot;
      
}
//显示累计秒数
//second：累计秒数，内部按小时格式化为4位显示
void showtime(double second)
{
   char bb[4];
  int a=second;
  int b=a%3600;
  b=b*10/3600;
  bb[0]=String(b).charAt(0);
  int c=a/3600;
  b=c%10;
  bb[1]=String(b).charAt(0);
  c=c/10;
  b=c%10;
  bb[2]=String(b).charAt(0);
  c=c/10;
  b=c%10;
  bb[3]=String(b).charAt(0);

   

  d.displayString(bb);
   d.setDot(1,flashdot);
   flashdot=!flashdot;
  //Serial.println(bb);

}
int iiii=10;
void setup() 
{
  delay(500);
  pinMode(SW_PIN, INPUT_PULLUP);
  timebegin=millis();
   
SPI.begin(12, 13, 11, FRAM_CS); //SCK, MISO, MOSI, CS
pinMode(FRAM_CS, OUTPUT);
digitalWrite(FRAM_CS, HIGH);
ensureFramWritable();
TimeTotle = framRead32(FRAM_ADDR_TIME);
// if (TimeTotle == 0xFFFFFFFF || TimeTotle > (unsigned long)(999.8*3600)) {
//   TimeTotle = 0;
//   framWrite32(FRAM_ADDR_TIME, (uint32_t)TimeTotle);
// }
  Wire.setPins(5, 4); //SDA, SCL
  Wire.begin(); //Join the bus as master

  Serial.begin(115200); //Start serial communication at 9600 for debug statements
  Serial.print("Initial TimeTotle: ");
  Serial.println(TimeTotle);
  Serial.println("TM1650 Example Code");
  d.init();
  d.setBrightness(0x01);
  xLastWakeTime = xTaskGetTickCount();
      unsigned long timenow=millis();
    if (TimeTotle<(unsigned long)(999.8*3600))
    {
          TimeTotle=TimeTotle+(timenow-timebegin)/1000;
          timebegin=timenow;
    }
        showtime(TimeTotle*1.0);
   
}

void loop() 
{

    vTaskDelayUntil(&xLastWakeTime, xFrequency);

    framWrite32(FRAM_ADDR_TIME, (uint32_t)TimeTotle);

    if (digitalRead(SW_PIN)==0)
    {
      Serial.println("you have put the butten reset");
      iiii--;
      
      if (iiii==0)
      {     
        TimeTotle=0;
        framWrite32(FRAM_ADDR_TIME, (uint32_t)TimeTotle);
      }
    }else
    {
      iiii=10;
    }
    
    //Serial.println("TM1650 Example Code");
   // showtime("4000",1);
  //  delay(2000);
    //showtime("8000",2);
    //delay(2000);
    unsigned long timenow=millis();
     if (TimeTotle<(unsigned long)(999.8*3600))
    {
          TimeTotle=TimeTotle+(timenow-timebegin)/1000;
          timebegin=timenow;
    }
    

    Serial.println(String(TimeTotle*1.0));
    showtime(TimeTotle*1.0);
   // delay(1000);

}