深入理解ARM体系架构（S3C6410）---ad转化实例

ad转化器相关代码：

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1. voidadc_init()
2. {
4. charpreScaler=66500000/2500000-1;//PCLK=66M
5. rADCCON=(1<14)|(preScaler<6)|(0<3)|(0<2);//通道AIN0
6. //rADCCON=0x44c1;//通道AIN0
7. }
8. intread_adc()
9. {
11. rADCCON|=0x01;//startADC
13. while(rADCCON&0x1);//checkifEnable_startislow
16. while(!(rADCCON&0x8000));//checkifEC(EndofConversion)flagishigh
18. return((int)rADCDAT0&0x3ff);
19. }
21. voiddelay_adc()
22. {
23. inti,j;
24. for(i=0;i<10000000;i++)
25. for(j=0;j>10000000;j++);
26. }

初始化子程序：

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1. voidLCD_Init(void)
2. {
4. //设置LCD调光
5. //rGPFCON|=(1<30);//设置LCD调光管脚GPF15(PWM1)为输出
6. //rGPFDAT|=(1<15);//rGPFDAT=0x00002000;
7. //rGPFPUD&=~(1<30);//rGPFPUD=0x00000000;
9. //设置VD0~15
10. rGPICON=0xaaaaaaaa;//设置GPI0~15为LCDVD0~15
11. rGPIPUD=0xffffffff;
15. //设置VD16~23和HSYNC、VSYNC、VDEN、VCLK
16. rGPJCON=0x00aaaaaa;
17. rGPJPUD=0xffffffff;
18. rWINCON0&=~(1<0);
20. //LCD寄存器设置
21. rSPCON&=(~0x3);
22. rSPCON|=(1<0);//设置RGBI/F配置
23. rMIFPCON&=~(1<3);//设置LCD支路为一般模式
25. rVIDCON0=(0<29)|(0<26)|(0<17)|(1<16)|(9<6)|(0<5)|(1<4)|(0<3)|(0<2);
26. rVIDCON1=1<7;//1=RGB类型LCD设备在VCLK上升沿得到视频数据
28. //设置屏的时序
29. rVIDTCON0=(0x00<16)|(0x00<8)|(0x02<0);
30. rVIDTCON1=(0x2d<16)|(0x04<8)|(0x06<0);
31. rVIDTCON2=(271<11)|(479<0);
33. //设置窗口格式
34. rWINCON0=11<2;//设置24BPP
36. //设置窗口位置
37. rVIDOSD0A=(0<11)|(0<0);
38. rVIDOSD0B=(479<11)|(271<0);
39. rVIDOSD0C=(((480*272)&0xffffff)<0);//4.3屏幕分辨率480*272
41. //设置Window1的开始和结束的缓存地址与地址在内存中的存放地址以及缓存的大小
42. rVIDW00ADD0B0=((addr>>24)<24)|(addr&0xffffff);
43. rVIDW00ADD1B0=(addr&0xffffff+480*272);
44. rVIDW00ADD2=(0<13)|(480<0);
46. //设置抖动
47. rDITHMODE=(1<5)|(1<3)|(1<1)|(1<0);
49. //开显示
50. rVIDCON0|=(3<0);
51. rWINCON0|=(1<0);
52. }

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1. voidPaint_text(unsignedintx,unsignedinty,unsignedintcolor,unsignedcharch[],unsignedintlengx,intlengy){
2. inti,j,test,t=-1;
3. for(i=0;ilengy;i++){
4. for(j=0;jlengx;j++){
5. if(j%8==0){
6. test=0x80;
7. t++;
8. }
9. if(ch[t]&test)
10. LCD_BUFFER[y+i][x+j]=color;
11. else
12. LCD_BUFFER[y+i][x+j]=0xffffff;
14. test>>=1;
15. }
16. }
17. }

头文件中字符数据定义：

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1. unsignedcharcharnum[10][16]={
2. {0x00,0x00,0x00,0x18,0x24,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18,0x00,0x00},
3. {0x00,0x00,0x00,0x10,0x70,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x7C,0x00,0x00},
4. {0x00,0x00,0x00,0x3C,0x42,0x42,0x42,0x04,0x04,0x08,0x10,0x20,0x42,0x7E,0x00,0x00},
5. {0x00,0x00,0x00,0x3C,0x42,0x42,0x04,0x18,0x04,0x02,0x02,0x42,0x44,0x38,0x00,0x00},
6. {0x00,0x00,0x00,0x04,0x0C,0x14,0x24,0x24,0x44,0x44,0x7E,0x04,0x04,0x1E,0x00,0x00},
7. {0x00,0x00,0x00,0x7E,0x40,0x40,0x40,0x58,0x64,0x02,0x02,0x42,0x44,0x38,0x00,0x00},
8. {0x00,0x00,0x00,0x1C,0x24,0x40,0x40,0x58,0x64,0x42,0x42,0x42,0x24,0x18,0x00,0x00},
9. {0x00,0x00,0x00,0x7E,0x44,0x44,0x08,0x08,0x10,0x10,0x10,0x10,0x10,0x10,0x00,0x00},
10. {0x00,0x00,0x00,0x3C,0x42,0x42,0x42,0x24,0x18,0x24,0x42,0x42,0x42,0x3C,0x00,0x00},
11. {0x00,0x00,0x00,0x18,0x24,0x42,0x42,0x42,0x26,0x1A,0x02,0x02,0x24,0x38,0x00,0x00}};
16. unsignedcharcharnumc[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1C,0x22,0x40,0x40,0x40,0x22,0x1C,0x00,0x00};
17. unsignedcharcharnumo[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x42,0x42,0x42,0x42,0x42,0x3C,0x00,0x00};
18. unsignedcharcharnumn[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xDC,0x62,0x42,0x42,0x42,0x42,0xE7,0x00,0x00};
19. unsignedcharcharnumv[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE7,0x42,0x24,0x24,0x28,0x10,0x10,0x00,0x00};
20. unsignedcharcharnume[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x42,0x7E,0x40,0x40,0x42,0x3C,0x00,0x00};
21. unsignedcharcharnumr[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xEE,0x32,0x20,0x20,0x20,0x20,0xF8,0x00,0x00};
22. unsignedcharcharnums[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3E,0x42,0x40,0x3C,0x02,0x42,0x7C,0x00,0x00};
23. unsignedcharcharnumi[]={0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x70,0x10,0x10,0x10,0x10,0x10,0x7C,0x00,0x00};

主函数程序：

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1. adc_init();
3. LCD_Init();
4. Paint_background(0xffffff,0,0,480,272);
7. while(1)
8. {
9. adc_data=read_adc();
10. adc_data=(adc_data*32226);
12. adc_data_tmp[0]=adc_data/100000/100;