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	 > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > S5PV210(TQ210)學(xué)習(xí)筆記——LCD驅(qū)動(dòng)編寫(xiě)
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          S5PV210(TQ210)學(xué)習(xí)筆記——LCD驅(qū)動(dòng)編寫(xiě)
          
						
          
				作者：
				時(shí)間：2016-11-28
				來(lái)源：網(wǎng)絡(luò)
				
				
				
				
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			網(wǎng)上S5PV210內(nèi)核移植的文章不是很多，而描述2440和6410內(nèi)核移植的文章多數(shù)是講如何移植，而非手動(dòng)編寫(xiě)，但是，韋東山老師的視頻中講述了如何從頭編寫(xiě)LCD驅(qū)動(dòng)，當(dāng)然是以2440為例的，我看過(guò)視頻之后在TQ210平臺(tái)上進(jìn)行了實(shí)驗(yàn)，實(shí)驗(yàn)成功，詳細(xì)的原理部分以我現(xiàn)在的水平還難以表達(dá)清楚。下載是我自己寫(xiě)的代碼，適用于TQ210的7寸電容屏。
          1. #include
          2. #include
          3. #include
          4. #include
          7. staticstructfb_info*lcd_info;
          8. unsignedlongpseudo_palette[16];
          10. unsignedlong*display_control;
          12. volatileunsignedlong*gpf0con;
          13. volatileunsignedlong*gpf1con;
          14. volatileunsignedlong*gpf2con;
          15. volatileunsignedlong*gpf3con;
          16. volatileunsignedlong*gpd0con;
          17. volatileunsignedlong*gpd0dat;
          18. volatileunsignedlong*vidcon0;
          19. volatileunsignedlong*vidcon1;
          20. volatileunsignedlong*vidtcon0;
          21. volatileunsignedlong*vidtcon1;
          22. volatileunsignedlong*vidtcon2;
          23. volatileunsignedlong*wincon0;
          24. volatileunsignedlong*vidosd0a;
          25. volatileunsignedlong*vidosd0b;
          26. volatileunsignedlong*vidosd0c;
          27. volatileunsignedlong*vidw00add0b0;
          28. volatileunsignedlong*vidw00add1b0;
          29. volatileunsignedlong*shodowcon;
          31. structclk*lcd_clk;
          34. staticinlineunsignedintchan_to_field(unsignedintchan,structfb_bitfield*bf)
          35. {
          36. chan&=0xffff;
          37. chan>>=16-bf->length;
          38. returnchan<offset;
          39. }
          41. staticintlcdfb_setcolreg(unsignedintregno,unsignedintred,
          42. unsignedintgreen,unsignedintblue,
          43. unsignedinttransp,structfb_info*info)
          44. {
          45. unsignedintval;
          47. if(regno>16)
          48. return1;
          50. /*用red,green,blue三原色構(gòu)造出val*/
          51. val=chan_to_field(red,&info->var.red);
          52. val|=chan_to_field(green,&info->var.green);
          53. val|=chan_to_field(blue,&info->var.blue);
          55. //((u32*)(info->pseudo_palette))[regno]=val;
          56. pseudo_palette[regno]=val;
          57. return0;
          58. }
          60. staticstructfb_opslcd_fbops={
          61. .owner=THIS_MODULE,
          62. .fb_setcolreg=lcdfb_setcolreg,
          63. .fb_fillrect=cfb_fillrect,
          64. .fb_copyarea=cfb_copyarea,
          65. .fb_imageblit=cfb_imageblit,
          66. };
          68. staticintlcd_init(void){
          69. intret;
          71. /*分配fb_info*/
          72. lcd_info=framebuffer_alloc(0,NULL);
          73. if(lcd_info==NULL){
          74. printk(KERN_ERR"allocframebufferfailed!");
          75. return-ENOMEM;
          76. }
          78. /*配置fb_info各成員*/
          79. /*fix*/
          80. strcpy(lcd_info->fix.id,"s5pv210_lcd");
          81. lcd_info->fix.smem_len=800*480*4;
          82. lcd_info->fix.type=FB_TYPE_PACKED_PIXELS;
          83. lcd_info->fix.visual=FB_VISUAL_TRUECOLOR;
          84. lcd_info->fix.line_length=800*4;
          86. /*var*/
          87. lcd_info->var.xres=800;
          88. lcd_info->var.yres=480;
          89. lcd_info->var.xres_virtual=800;
          90. lcd_info->var.yres_virtual=480;
          91. lcd_info->var.bits_per_pixel=32;
          93. lcd_info->var.red.offset=16;
          94. lcd_info->var.red.length=8;
          95. lcd_info->var.green.offset=8;
          96. lcd_info->var.green.length=8;
          97. lcd_info->var.blue.offset=0;
          98. lcd_info->var.blue.length=8;
          99. lcd_info->var.activate=FB_ACTIVATE_NOW;
          100. 				   
				
            
                
			
							
            
                
			            
            
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