📄 video.c
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//atmega16-16pi
//12Mhz
//同步端：D.1 + 二极管（in4148) + 1000 欧-----
// |----75欧----地
//视频端：D.0 + 二极管（in4148) + 330 欧------
#include <avr/io.h>
#include <avr/signal.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>
#define uchar unsigned char
#define uint unsigned int
#include "Picture.h"
#define led_run; PORTA^=(1<<6); //VIOED LED
uchar syncON, syncOFF; //行同步
uchar v1, v2, v3, v4, v5, v6, v7, v8; //显示行数据
uint volatile LineCount;
uint volatile Count;
uchar volatile framecount; //帧计数
uchar flashcount; //画面计数
uchar screen[800]; //画面缓存
#define lineTime 762 //1行=1000000/25/625 US *12MHZ-1
#define ScreenTop 80//40 //定义显示区域顶行
#define ScreenBot 240 //定义显示区域底行
void Display(void);
SIGNAL(SIG_OUTPUT_COMPARE1A)
{
PORTD = syncON;
LineCount ++ ;
if (LineCount==298)
{
syncON = 0x02;
syncOFF = 0;
}
if (LineCount==301)
{
syncON = 0;
syncOFF = 0x02;
}
if (LineCount==313)
{
LineCount = 1;
Count = 0;
}
PORTD = syncOFF;
}
int main(void)
{
cli();
DDRA = 0xff;
PORTD = 0;
DDRD = 0xff;
OCR1A = lineTime;
TCCR1B = 8;
TCCR1A = 0x00;
TIMSK = 0x10;
LineCount = 1;
framecount=0;
flashcount=0;
syncON = 0B00000000;
syncOFF = 0B00000010;
//initialize画面缓存
/* for (i=0;i<=799;i=i+1)
{
screen[i]=zk1[0][i];
}*/
sei();
sbi(TCCR1B,CS10);
while(1)
{
//precompute pixel index for next line
/* if ((LineCount<ScreenBot) && (LineCount>=ScreenTop))
{
//left-shift 3 would be individual lines
// <<2 means line-double the pixels
//<<2使2行像素显示相同的信息
i=(LineCount-ScreenTop)<<2 & 0xfff8; //（0-199）<<2
} */
//stall here until next line starts
//sleep enable; mode=idle
//使用休眠使进入同步中断入口时间统一
set_sleep_mode(SLEEP_MODE_IDLE);
sleep_mode();
led_run;
//Put code here to execute once/line
//During the active portion of a line;
//--TCNT1 goes from about 130 to about 480
//--Usable lines 1 to about 240
//注意：以下代码每行执行一次，且时序严格，视频间隔相同
if ((LineCount<ScreenBot) && (LineCount>ScreenTop))
{
uchar Temp;
for(Temp = 10; Temp !=0;Temp--)
cbi(PORTD,0);
// for(Temp = 5; Temp != 0; Temp--)
// sbi(PORTD,0);
/*
for(Temp = 10; Temp !=0;Temp--)
if((LineCount < 50))
sbi(PORTD,0);
else
cbi(PORTD,0);
for(Temp = 5; Temp != 0; Temp--)
sbi(PORTD,0);
cbi(PORTD,0);*/
{
v1 = pgm_read_byte(HanZi + Count); Count ++;
v2 = pgm_read_byte(HanZi + Count); Count ++;
v3 = pgm_read_byte(HanZi + Count); Count ++;
v4 = pgm_read_byte(HanZi + Count); Count ++;
v5 = pgm_read_byte(HanZi + Count); Count ++;
v6 = pgm_read_byte(HanZi + Count); Count ++;
v7 = pgm_read_byte(HanZi + Count); Count ++;
v8 = pgm_read_byte(HanZi + Count); Count ++;
if(v1 & 0B10000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v1 & 0B01000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v1 & 0B00100000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v1 & 0B00010000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v1 & 0B00001000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v1 & 0B00000100){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v1 & 0B00000010){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v1 & 0B00000001){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v2 & 0B10000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v2 & 0B01000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v2 & 0B00100000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v2 & 0B00010000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v2 & 0B00001000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v2 & 0B00000100){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v2 & 0B00000010){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v2 & 0B00000001){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v3 & 0B10000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v3 & 0B01000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v3 & 0B00100000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v3 & 0B00010000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v3 & 0B00001000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v3 & 0B00000100){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v3 & 0B00000010){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v3 & 0B00000001){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v4 & 0B10000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v4 & 0B01000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v4 & 0B00100000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v4 & 0B00010000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v4 & 0B00001000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v4 & 0B00000100){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v4 & 0B00000010){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v4 & 0B00000001){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v5 & 0B10000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v5 & 0B01000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v5 & 0B00100000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v5 & 0B00010000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v5 & 0B00001000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v5 & 0B00000100){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v5 & 0B00000010){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v5 & 0B00000001){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v6 & 0B10000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v6 & 0B01000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v6 & 0B00100000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v6 & 0B00010000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v6 & 0B00001000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v6 & 0B00000100){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v6 & 0B00000010){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v6 & 0B00000001){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v7 & 0B10000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v7 & 0B01000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v7 & 0B00100000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v7 & 0B00010000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v7 & 0B00001000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v7 & 0B00000100){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v7 & 0B00000010){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v7 & 0B00000001){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v8 & 0B10000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v8 & 0B01000000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v8 & 0B00100000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v8 & 0B00010000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v8 & 0B00001000){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v8 & 0B00000100){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v8 & 0B00000010){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
if(v8 & 0B00000001){asm("sbi 0x12,0"::);}else{asm("cbi 0x12,0"::); }
asm("cbi 0x12,0"::);
}
}
/* if (framecount>=100)
{
framecount=0;
flashcount++;
if(flashcount>=9){flashcount=0;}
for (i=0;i<=799;i=i+1)
{
screen[i]=zk1[flashcount][i];
}
}*/
}
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