/*
  當光照強的時候關閉LED燈  手捂著感測器跑馬燈
*/
#include<iocc2530.h>

int count=0;
char output[8];

void Delay(unsigned char m)
{
  int i=0,j=0;
  for(i=0;i<1000;i++)
    for(j=0;j<m;j++);
}

//定義一個函式用來進行adc轉換
unsigned short get_adc()
{
  APCFG|=1;
  P0SEL |=0x01;
  P0DIR &=~0x01;
  ADCCON3 = 0X90;
  ADCCON3=(0X80|0X10|0X00);
  ADCIF=0;
  while(!ADCIF);
  unsigned long value;
  value = ADCH;
  value = value<<8;
  value |=ADCL;
  value = value*330;
  value = value>>15;
  return value;
}

void initUART0()
{
  PERCFG|= 0x00;
  P0SEL |=0X0C;
  U0CSR |=0X80;
  U0GCR = 10;
  U0BAUD = 216;
  U0UCR |= 0X80;
  U0CSR |=0X40;

  UTX0IF = 0;
  URX0IF = 0;
  EA = 1;
  URX0IE = 1;
}
void initT1()
{
  CLKCONCMD &=~0x40;
  while(CLKCONSTA &0X40);
  CLKCONCMD &=~0X47;

  T1CTL |= 0X05;
  IEN1 |=0X02;
  EA=1;
}

void led()
{
  P1 = 0x02;
  Delay(100);
  P1 =0x01;
  Delay(100);
  P1=0x10;
  Delay(100);
  P1=0x08;
  Delay(100);
  P1=0x10;
  Delay(100);
  P1 =0x01;
  Delay(100);
  P1 = 0x02;
  Delay(100);
  P1 = 0x00;
  Delay(100);

}
void UART0SendString(char *str)
{
  while(1)
  {
    if(*str=='\0')
      break;
    U0DBUF = *str++;
    while(!UTX0IF);
    UTX0IF = 0;
  }
}
int isRun = 0;
#pragma vector = T1_VECTOR
__interrupt void t1()
{
    count++;
    unsigned short gz_val = get_adc();
    if(gz_val<300)
      isRun=1;
    else
      isRun=0;
   if(count==30)
    {
      count = 0;

      output[0] = gz_val/100+'0';
      output[1] = '.';
      output[2] = gz_val/10%10+'0';
      output[3] = gz_val%10+'0';
      output[4] = 'V';
      output[5] = '\r';
      output[6] = '\n';
      output[7] ='\0';
      UART0SendString("光照值：");
      UART0SendString(output);
    }
  T1IF = 0;
}

void main()
{
  P1SEL = 0x00;
  P1DIR = 0x1B;
  P1=0;
  unsigned short gz_val = get_adc();
  initUART0();
  initT1();

  while(1)
  {
    if(isRun==1)
    {
      led();
      isRun=0;
    }
  }

}