用AtmelStudio6.2跑mega16例程(58)8155扩展

/*

* GccApplication21.c

*

* Created: 2014-11-25 18:20:45

* Author: Administrator

*/ 



#define F_CPU 2000000UL

#include <avr/io.h>

#include <avr/interrupt.h>

#include <util/delay.h>

#include <stdint.h>



#define COMM_8155 (uint8_t*)0xFD00 //命令字端口

#define PA_8155 (uint8_t*)0xFD01 //PA端口地址

#define PB_8155 (uint8_t*)0xFD02

#define PC_8155 (uint8_t*)0xFC00

#define CONT_8155_L8 (uint8_t*)0xFD04

#define CONT_8155_H8 (uint8_t*)0xFD05

#define PMEM_8155 (uint8_t*)0xFC00



#define BEEP() PORTB ^= _BV(PB0)



const uint8_t SEG_CODE[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xFF};



uint8_t Disp_Buffer[4] = {10,3,5,0};



volatile uint16_t cnt_8155 = 350;



enum OP_Type{ADD,SUB};



void Sounder()

{

uint8_t i;

for(i = 0; i<50; i++)

{

BEEP();_delay_us(160);

}

}







void Set_8155_TC()

{

*CONT_8155_L8 = (uint8_t)cnt_8155;

*CONT_8155_H8 = (uint8_t)(cnt_8155>>8);

*COMM_8155 = 0B11000011; 

}



void adjust_tCount(enum OP_Type op)

{

uint8_t i;

uint16_t cnt;

cnt_8155=(op == ADD)? cnt_8155+50:cnt_8155 - 50;

if(cnt_8155 > 500) cnt_8155 = 500;

else if(cnt_8155 < 100) cnt_8155 = 100;

cnt = cnt_8155;

for(i=3;i>=1;i--)

{

Disp_Buffer[i] = cnt % 10;

cnt /=10;

} 



}



void Key_Process()

{



uint8_t i;

static uint8_t Pre_Key_State = 0xFF;

uint8_t curr_Key_State = * PC_8155 | 0xF0;

if(Pre_Key_State == curr_Key_State)return;

Pre_Key_State = curr_Key_State;



switch(curr_Key_State)

{

case (uint8_t)~_BV(0):

adjust_tCount(ADD);

break;

case (uint8_t)~_BV(1):

adjust_tCount(SUB);

break;

case (uint8_t)~_BV(2):

Set_8155_TC();

break;

case (uint8_t)~_BV(3):

for(i=0;i<=100;i++)

{

*(PMEM_8155 +i) = i; 

}

break;





}

}





int main(void)

{

uint8_t i;



DDRA = 0xFF;

DDRB = 0xFF;

DDRC = 0xFF;

DDRD = 0x00; PORTD = 0xFF;

MCUCR = 0x82;

*COMM_8155 = 0B00000011;

GICR = _BV(INT0);

sei();

while(1)

{

for(i = 0;i<4;i++)

{

*PB_8155 = 0x00;

*PA_8155 = SEG_CODE[Disp_Buffer[i]];

*PB_8155 = _BV(7-i);

_delay_ms(4);

Key_Process();

}

}

}





ISR(INT0_vect)

{

Sounder();

Set_8155_TC();

}