#include"include.h"
uchar lcdtab[3][10][3]={{{0x07,0x01,0x03},{0x04,0x00,0x02},{0x06,0x03,0x01},
{0x06,0x02,0x03},{0x05,0x02,0x02},{0x03,0x02,0x03},{0x03,0x03,0x03},{0x06,0x00,0x02},
{0x07,0x03,0x03},{0x07,0x02,0x03}},
{{0x18,0x14,0x0c},{0x10,0x10,0x00},{0x18,0x08,0x0c},
{0x18,0x18,0x08},{0x10,0x1c,0x00},{0x08,0x1c,0x08},{0x08,0x1c,0x0c},{0x18,0x10,0x00},
{0x18,0x1c,0x0c},{0x18,0x1c,0x08}},
{{0x60,0x40,0x70},{0x00,0x40,0x40},{0x40,0x60,0x30},
{0x40,0x60,0x60},{0x20,0x60,0x40},{0x60,0x20,0x60},{0x60,0x20,0x70},{0x40,0x40,0x40},
{0x60,0x60,0x70},{0x60,0x60,0x60}}}; // 筆段式液晶 的seg口的 單片機(jī) io口隱映射表，根據(jù)不同的筆段式lcd即可自行制表。。。，上面是1/2偏壓,1/3占空比筆段式lcd的編碼,三個(gè)com口通過兩個(gè)電阻接到公共時(shí)鐘端io口，兩電阻抽頭接到lcd的com端，seg口可直接接單片機(jī)io口。。
uchar com;
uchar counter;
uint slashtime;
uchar flashweisel;
#pragma interrupt_handler timer0_ovf_isr:iv_TIMER0_OVF
void timer0_ovf_isr(void)
{
uchar segb,segc;
TCNT0 = 0x83; //reload counter value
flshtm++;
counter++;
if(counter==8)//每過八毫秒，換行掃描，總共三行，共24ms一幀，幀頻達(dá)到40hz左右
{
counter=0;
segb=lcdtab[0][wei6][com]|lcdtab[1][wei5][com]|lcdtab[2][wei4][com];
segc=lcdtab[0][wei3][com]|lcdtab[1][wei2][com]|lcdtab[2][wei1][com];
以下的兩個(gè)if else 語(yǔ)句是實(shí)現(xiàn)位閃爍功能的，可以去掉，不影響正常顯示
if(flshtm<slashtime)
flashweisel=0;
else if(flshtm>(slashtime*2))
flshtm=0;
if((flashweisel>=4)&&(flashweisel<=6))
segb &= (~lcdtab[6-flashweisel][8][com]);
else if(flashweisel)
segc &= (~lcdtab[3-flashweisel][8][com]);
PORTB=segb;
PORTC=segc;
PORTD=0x70&(~(1<<(com+4)));// 掃描com口
if(++com==3)com=0;//com++，//逐行掃描每個(gè)com口
}
if(counter%4==0)//每過4ms翻轉(zhuǎn)一次，即交流
{
PORTC=~PORTC;
PORTB=~PORTB;
PORTD=(~PORTD)&0xf7;
}
}
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