S3C2440-LCD字符显示
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void Paint_text(U32 x, U32 y, U32 color, unsigned char ch[]){
int i, j, test, s, t = 0;
for(i = 0; i ＜ 16; i++){
test = 0x80;
for(j = 0; j ＜ 16; j++){
if(j == 8){
test = 0x80;
t++;
}
if(ch[t] & test)
LCD_BUFFER[x+i][y+j] = color;
test ＞＞= 1;
}
t++;
}
}
void Paint_text_8(U32 x, U32 y, U32 color, unsigned char ch[]){
int i, j, test;
for(i = 0; i ＜ 16; i++){
test = 0x80;
for(j = 0; j ＜ 8; j++){
if(test & ch[ i])
LCD_BUFFER[x+i][y+j] = color;
test ＞＞= 1;
}
}
}
void Paint_background(U32 c){
unsigned int i, j;
for(j = 0; j ＜ LCD_YSIZE; j++)
for(i = 0; i ＜ LCD_XSIZE; i++)
LCD_BUFFER[j][ i] = c;
}
int LcdMain(){
Init_LCD();
Paint_background(0xFFFFFF);
Paint_text(100,100,0x000000,li);
Paint_text(100,116,0x000000,wan);
Paint_text(100,132,0x000000,peng);
Paint_text_8(116,100,0x000000,L);
Paint_text_8(116,108,0x000000,I);
Paint_text_8(116,116,0x000000,N);
Paint_text_8(116,124,0x000000,U);
Paint_text_8(116,132,0x000000,X);
Paint_text_8(116,140,0x000000,AND);
Paint_text_8(116,148,0x000000,A);
Paint_text_8(116,156,0x000000,R);
Paint_text_8(116,164,0x000000,M);
while(1);
}
如果使用字库，每个汉字的地址由两个字节表示。一个是区号，一个是区中的位置，即位号。16*16的点阵字库中，每个字符占32个字节，每94个字符为一个区，共87个区，其中1"15区为常用符号区（包括数字0"9及大小写英文字母），16"86为常用汉字，其排列是以汉语拼音为序，从一声到四声，第87区为生僻汉字。汉字的起始地址是0xA1A1，A1+94=255，所以一个区有94个字符。区和位的起始号都是1，数组是从0开始，所以如果想在字库中定位一个字符，（94*（qu-1）+wei）*32。如果中文字符和ASCII码混合在一样，如何区分它们呢？其实也很简单，ASCII码的最高位是0，而中文的最高位是1，因此当读取到的一个字节的最高位是0，则该字节为ASCII码，它的下一个字节与这个字节无关；当取得到的字节的最高位是1，则表示的是中文字符，并且该字节与它的下一个字节组合在一起表示完整的一个汉字。
#include "Font_Libs.h"
#define rGPCCON (*(volatile unsigned *)0x56000020)
#define rGPCUP (*(volatile unsigned *)0x56000028)
#define rGPDCON (*(volatile unsigned *)0x56000030)
#define rGPDUP (*(volatile unsigned *)0x56000038)
#define rLCDCON1 (*(volatile unsigned *)0x4d000000)
#define rLCDCON2 (*(volatile unsigned *)0x4d000004)
#define rLCDCON3 (*(volatile unsigned *)0x4d000008)
#define rLCDCON4 (*(volatile unsigned *)0x4d00000c)
#define rLCDCON5 (*(volatile unsigned *)0x4d000010)
#define rLCDSADDR1 (*(volatile unsigned *)0x4d000014)
#define rLCDSADDR2 (*(volatile unsigned *)0x4d000018)
#define rLCDSADDR3 (*(volatile unsigned *)0x4d00001c)
#define rLCDINTMSK (*(volatile unsigned *)0x4d00005c)
#define rTPAL (*(volatile unsigned *)0x4d000050)
#define rGPGCON (*(volatile unsigned *)0x56000060) //Port G control
#define rGPGDAT (*(volatile unsigned *)0x56000064) //Port G data
#define rGPGUP (*(volatile unsigned *)0x56000068) //Pull-up control G
#define rLCDINTMSK (*(volatile unsigned *)0x4d00005c)
#define rTCONSEL (*(volatile unsigned *)0x4d000060) //LPC3600 Control --- edited by junon
//垂直同步信号的脉宽、后肩和前肩
#define VSPW 15
#define VBPD 3
#define VFPD 5
//水平同步信号的脉宽、后肩和前肩
#define HSPW 8
#define HBPD 58
#define HFPD 15
#define CLKVAL 10
#define HOZVAL 319
#define LINEVAL 239
#define PWREN 1
#define MMODE 0
#define PNRMODE 3
#define BPPMODE 13
#define INVVCLK 0
#define INVVD 0
#define INVVDEN 0
#define U32 unsigned int
#define M5D(n) ((n) & 0x1fffff)
#define PAGEWIDTH 320
#define OFFSIZE 0
#define LCD_XSIZE 320
#define LCD_YSIZE 240
#define SCR_XSIZE 320
#define SCR_YSIZE 240
#define INVVLINE 1
#define INVVFRAME 1
#define BPP24BL 0
#define BSWP 0
#define HWSWP 0
volatile U32 LCD_BUFFER[240][320];
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