app.c

AVR单片机 C语言程序设计经典实用

//***************************************************************
// File Name : app.c
// Author    : Steaven
// Created   : 2008-06-09
// Modified  : 
// Revision  : V0.0
//***************************************************************

#include "includes.h"

//local function declaration
void Gpio_Init(void);
void Timer0_Init(void);
void Timer1_Init(void);
void Interrupt_Init(void);
void Adc_Init(void);

//***************************************************************
// Function    : Hardware_Init
// Input       : none
// Output      : none
// Description : ATmega16 Hardware Initialization
//***************************************************************
void Hardware_Init(void)
{
	Gpio_Init();
	Adc_Init();
	Timer0_Init();
	Timer1_Init();
	Interrupt_Init();
}

//***************************************************************
// Function    : Gpio_Init
// Input       : none
// Output      : none
// Description : ATmega16 GPIO Initialization
//***************************************************************
void Gpio_Init(void)
{
    DDRA  = 0x00; //PortA - Input without internal pull-up
    PORTA = 0x00; 
    DDRB  = 0x00; //PortB - Input without internal pull-up
    PORTB = 0x00; 
    DDRC  = 0x00; //PortC - Input without internal pull-up 
    PORTC = 0x00; 
    DDRD  = 0x00; //PortD - Input without internal upll-up
    PORTD = 0x00; 
}

//***************************************************************
// Function    : Timer0_Init
// Input       : none
// Output      : none
// Description : ATmega16 Timer0 Initialization,10ms Interval
//***************************************************************
void Timer0_Init(void)
{
	TCCR0 = 0x0B;   //64 division,8M/64,CTC Mode
	TCNT0 = 0x00;   //Clear Counter
	OCR0  = 63;     //125 * 64/8M = 1ms/1kHz 
	TIMSK |= 0x02;  //Enable OCIE0
	TIFR  |= 0x02;  //Clear OCIF0
}

//***************************************************************
// Function    : Timer1_Init
// Input       : none
// Output      : none
// Description : ATmega16 Timer1 Initialization,capture enabled
//***************************************************************
void Timer1_Init(void)
{
	TCCR1A = 0x00; //Normal Mode
	TCCR1B = 0x82; //8 division,rising-edge capture
	TIMSK |= 0x20; //Enbale Input Capture Interrupt.
	TIFR  |= 0x20; //Clear TIFR Interrupt Flag. 
}

//***************************************************************
// Function    : Adc_Init
// Input       : none
// Output      : none
// Description : ATmega16 ADC Initialization,free run
//***************************************************************
void Adc_Init(void)
{
	ADMUX  = 0x00;   //Select CH_0
	ADCSRA = 0xE0;   //Automatic Conversion	
}

//***************************************************************
// Function    : Interrupt_Init
// Input       : none
// Output      : none
// Description : ATmega16 Interrupt Initialization
//***************************************************************
void Interrupt_Init(void)
{
	SREG |= 0x80;   //Enable Global Interrupt
}

//=========================END OF FILE=========================//