#include <iom8v.h> //和單片機(jī)類型相對(duì)應(yīng)的頭文件，選擇Atmega8做實(shí)驗(yàn)；
#include <macros.h>
#include "discharge.h"
#include <stdio.h>
#include "LCD_1602.h"

void init_devices(void)
{
 CLI(); //禁止所有中斷
 MCUCR  = 0x00;
 MCUCSR = 0x80;//禁止JTAG
 GICR   = 0x00;
 port_init(); 
 usart_init();
 timer1_init(10,10,4000);//PWM上限 4000
 timer2_init();
 AD_init(); 
 LCD_init();
 delay_nms(10);
 SEI();//開全局中斷
}

//端口初始化
void port_init(void)
{	 
   DDRB&=~(1<<0)|(1<<3)|(1<<4)|(1<<5);//KEY 輸入
   PORTB|=(1<<0)|(1<<3)|(1<<4)|(1<<5);//KEY 開上拉
   DDRC|=(1<<4)|(1<<5);//LED_G  LED_R  
   DDRB&=~(1<<1)|(1<<2);//PWMA PWMB 設(shè)為輸入,即關(guān)閉
}

//串口通信初始化
void usart_init(void)
{
 UCSRB = 0x00;//禁止中斷
 UCSRA = 0x00;
 UCSRC = BIT(URSEL) | 0x06;
 UBRRL = 0x0C;
 UBRRH = 0x00;
 UCSRB = 0x18;
}

//定時(shí)器T2初始化
void timer2_init(void)
{
 TCCR2  = 0x00;//停止定時(shí)器
 ASSR   = 0x00;//異步時(shí)鐘模式
 TCNT2  = 0x06;//初始值
 OCR2   = 0x05;//匹配值
 TIMSK |= 0x40;//中斷允許
 TCCR2  = 0x06;//啟動(dòng)定時(shí)器
}

//定時(shí)T1初始化
void timer1_init(unsigned int a,unsigned int b,unsigned int top)
{
 TCCR1B = 0x00;//停止定時(shí)器
 TIMSK |= 0x00;//中斷允許
 TCNT1H = 0x00;
 TCNT1L = 0x00;//初始值
 OCR1A=a;//匹配A值
 OCR1B=b;//匹配B值
 ICR1=top-1;//輸入捕捉匹配值
 TCCR1A = 0x82;
 TCCR1B = 0x19;//啟動(dòng)定時(shí)器 無分頻
}
/*
//定時(shí)器T0初始化
void timer0_init(void)
{
 TCCR0  = 0x00;//停止定時(shí)器
 TCNT0  = 0xFF;//初始值
}

void timer0_start(void)
{
  TCNT0  = 0xFF;//初始值
  TCCR0  = 0x05;//啟動(dòng)定時(shí)器
}

void timer0_stop(void)
{
  TCCR0  = 0x00;//停止定時(shí)器
  LCD_write_number(9,0,0,TCNT0,"us",0);//
}
*/
void AD_init(void)
{   	
    ADCSRA=0X00; 
	ACSR  =(1<<ACD);//關(guān)閉模擬比較器   
    ADMUX =(1<<REFS0)|(1&0x0F); //
    ADCSRA=(1<<ADEN)|(1<<ADSC)|(1<<ADPS2)|(1<<ADPS1);//ADC轉(zhuǎn)換 64分頻
}

unsigned int read_adc (uchar r,uchar m)
{
 unsigned int adc_rel;
 ADMUX=0;
 ADMUX |=(m&0x0F);//選擇通道
 ADMUX |=(r<<6);//選擇基準(zhǔn)
 ADCSRA|=(1<<ADSC);//啟動(dòng)AD轉(zhuǎn)換
 delay_nus(125);
 adc_rel=ADC&0x3FF;
  return(adc_rel);
}

void delay_nms(unsigned int n)//延時(shí)n毫秒
{
  unsigned int i;
  for (i=0;i<n;i++)//執(zhí)行n次1毫秒延時(shí)
   {delay_nus(1000);}
}

void delay_nus(unsigned int n)//延時(shí)N微秒,N>=5  晶振:8MHz
{
  unsigned int i;
  for (i=5;i<n;i++)
  	  {
	  asm("nop");
	  asm("nop");	 
  	  } 
}