main.c

基于avr单片机的氢气测控系统源代码

#include <avr/io.h>
#include "global.h"
#include "keyboard.h"
#include <avr/delay.h>
#include "valve.h"


unsigned char procKey(void);
void initLED(void);
void setLEDState(unsigned char on,unsigned char mask);

struct key keyboard[4] = {
{KEY1_PRESS_MASK,KEY1_RELEASE_MASK,0x00,0x00,&onKey1Pressed,&onKey1Default}, 
{KEY2_PRESS_MASK,KEY2_RELEASE_MASK,0x00,0x00,&onKey2Pressed,&onKey2Default},
{KEY3_PRESS_MASK,KEY3_RELEASE_MASK,0x00,0x00,&onKey3Pressed,&onKey3Default},
{KEY4_PRESS_MASK,KEY4_RELEASE_MASK,0x00,0x00,&onKey4Pressed,&onKey4Default}
};

int main(void)
{
    initLED();
    initKeyboard();
    initAD();
    initValve();
    
    while(1)
    {
        procKey();
    }

}

/////////////////////////////////////////////////////////////////////
//Deal with key actions.
//If there are key actions then deal with them and return 1,
//otherwise just do nothing and return 0.
//Note: I know the design of struct key is complex, but it is for the 
//future extends.At the moment, we only need to see whether a certain
//key is pressed.
//So, I will ignore the other parts.
/////////////////////////////////////////////////////////////////////
unsigned char procKey()
{
    unsigned char i;
    for(i=0; i<4; ++i)
    {
        if(!(PIND & (keyboard[i].keyPressMask)))
	{
	    _delay_ms(KEY_CHECK_DELAY);
	    if(!(PIND & (keyboard[i].keyPressMask)))
	    {
	        keyboard[i].p_callFunction();
		return 1;     //That mean at the moment, we only serve
		           //for the first come key action.
	    }
	}
    }
    return 0;      //Urgel, I did nothing.    
        
}

////////////////////////////////////////////////////////////////
//If on = 1 , that means we wanna turn on a LED.
//If on = 0, that means we wanna turn off a LED.
//////////////////////////////////////////////////////////////////
void setLEDState(unsigned char on, unsigned char mask)
{
    if(on == 1)
    {
        PORTC &= mask;
    }
    else if(on == 0)
    {
	PORTC |= mask;
    }
}

void initLED()
{
    unsigned char i;
    PORTC = 0x00;
    DDRC = 0xff;
   
    for(i=0; i<2; ++i)
    {
        setLEDState(1, LED1_ON | LED2_ON | LED3_ON | LED4_ON);
        _delay_ms(LED_FLASH_PERIOD);
        setLEDState(0, LED1_OFF & LED2_OFF & LED3_OFF & LED4_OFF);
        _delay_ms(LED_FLASH_PERIOD);   
    }
}