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#include <reg52.h>
#include <intrins.h>
/* ========== 引腳定義（按接線修改） ========== */
sbit TFT_CS = P1^0; // 片選（低有效）
sbit TFT_DC = P1^1; // 數據/命令：1=數據 0=命令
sbit TFT_RST = P1^2; // 復位（低有效）
sbit TFT_SCK = P1^3; // SPI時鐘
sbit TFT_MOSI = P1^4; // SPI主出從入（DIN）
/* ========== 公用延時 ========== */
static void tiny_delay(void) { _nop_(); _nop_(); _nop_(); _nop_(); }
void delay_ms(unsigned int ms){
unsigned int i,j;
for(i=0;i<ms;i++) for(j=0;j<125;j++);
}
/* ========== SPI位打發送 ========== */
static void spi_write8(unsigned char v){
unsigned char i;
for(i=0;i<8;i++){
TFT_SCK = 0;
TFT_MOSI = (v & 0x80) ? 1 : 0; // 發送高位
tiny_delay();
TFT_SCK = 1; // 上升沿采樣
tiny_delay();
v <<= 1;
}
TFT_SCK = 0;
}
/* ========== ILI9341 基本寫接口 ========== */
static void tft_write_cmd(unsigned char cmd){
TFT_CS = 0;
TFT_DC = 0; // 命令
spi_write8(cmd);
TFT_CS = 1;
}
static void tft_write_data8(unsigned char dato){
TFT_CS = 0;
TFT_DC = 1; // 數據
spi_write8(dato);
TFT_CS = 1;
}
static void tft_write_data16(unsigned int dato){
TFT_CS = 0;
TFT_DC = 1;
spi_write8((unsigned char)(dato >> 8)); // 高字節
spi_write8((unsigned char)(dato & 0xFF));// 低字節
TFT_CS = 1;
}
/* 連續寫數據流（提升效率） */
static void tft_begin_stream(void){
TFT_CS = 0;
TFT_DC = 1;
}
static void tft_stream_data16(unsigned int dato){
spi_write8((unsigned char)(dato >> 8));
spi_write8((unsigned char)(dato & 0xFF));
}
static void tft_end_stream(void){
TFT_CS = 1;
}
/* ========== 參數與顏色 ========== */
#define TFT_W 240
#define TFT_H 320
/* RGB888→RGB565 */
#define RGB565(r,g,b) ( ((r&0xF8)<<8) | ((g&0xFC)<<3) | ((b)>>3) )
/* 常用色 */
#define COLOR_BLACK 0x0000
#define COLOR_WHITE 0xFFFF
#define COLOR_RED 0xF800
#define COLOR_GREEN 0x07E0
#define COLOR_BLUE 0x001F
#define COLOR_YELLOW 0xFFE0
#define COLOR_CYAN 0x07FF
#define COLOR_MAGENTA 0xF81F
#define COLOR_GRAY 0x8410
/* ========== 設置窗口 & 基礎繪圖 ========== */
static void tft_set_window(unsigned int x0, unsigned int y0, unsigned int x1, unsigned int y1){
// Column Address Set
tft_write_cmd(0x2A);
tft_write_data8(x0 >> 8); tft_write_data8(x0 & 0xFF);
tft_write_data8(x1 >> 8); tft_write_data8(x1 & 0xFF);
// Page Address Set
tft_write_cmd(0x2B);
tft_write_data8(y0 >> 8); tft_write_data8(y0 & 0xFF);
tft_write_data8(y1 >> 8); tft_write_data8(y1 & 0xFF);
// Memory Write
tft_write_cmd(0x2C);
}
void tft_draw_pixel(unsigned int x, unsigned int y, unsigned int color){
if(x>=TFT_W || y>=TFT_H) return;
tft_set_window(x, y, x, y);
tft_write_data16(color);
}
void tft_fill_rect(unsigned int x, unsigned int y, unsigned int w, unsigned int h, unsigned int color){
unsigned long count;
unsigned int i;
if(x>=TFT_W || y>=TFT_H) return;
if(x+w-1 >= TFT_W) w = TFT_W - x;
if(y+h-1 >= TFT_H) h = TFT_H - y;
tft_set_window(x, y, x+w-1, y+h-1);
count = (unsigned long)w * h;
tft_begin_stream();
while(count--) tft_stream_data16(color);
tft_end_stream();
}
void tft_fill_screen(unsigned int color){
tft_fill_rect(0, 0, TFT_W, TFT_H, color);
}
/* 畫線（Bresenham） */
void tft_draw_line(int x0,int y0,int x1,int y1,unsigned int color){
int dx = (x1>x0) ? (x1-x0) : (x0-x1);
int sx = (x0<x1) ? 1 : -1;
int dy = (y1>y0) ? (y0-y1) : (y1-y0);
int sy = (y0<y1) ? 1 : -1;
int err = dx + dy, e2;
for(;;){
tft_draw_pixel(x0,y0,color);
if(x0==x1 && y0==y1) break;
e2 = 2*err;
if(e2 >= dy){ err += dy; x0 += sx; }
if(e2 <= dx){ err += dx; y0 += sy; }
}
}
/* 畫矩形（邊框） */
void tft_draw_rect(unsigned int x, unsigned int y, unsigned int w, unsigned int h, unsigned int color){
if(w==0 || h==0) return;
tft_draw_line(x, y, x+w-1, y, color);
tft_draw_line(x, y+h-1, x+w-1, y+h-1, color);
tft_draw_line(x, y, x, y+h-1, color);
tft_draw_line(x+w-1, y, x+w-1, y+h-1, color);
}
/* ========== ILI9341 初始化（常用序列） ========== */
void tft_reset(void){
TFT_RST = 1; TFT_CS = 1; TFT_SCK = 0; TFT_MOSI = 0;
delay_ms(5);
TFT_RST = 0; delay_ms(20);
TFT_RST = 1; delay_ms(120);
}
void tft_init(void){
tft_reset();
// ILI9341 init (通用穩定序列)
tft_write_cmd(0xEF); tft_write_data8(0x03); tft_write_data8(0x80); tft_write_data8(0x02);
tft_write_cmd(0xCF); tft_write_data8(0x00); tft_write_data8(0xC1); tft_write_data8(0x30);
tft_write_cmd(0xED); tft_write_data8(0x64); tft_write_data8(0x03); tft_write_data8(0x12); tft_write_data8(0x81);
tft_write_cmd(0xE8); tft_write_data8(0x85); tft_write_data8(0x00); tft_write_data8(0x78);
tft_write_cmd(0xCB); tft_write_data8(0x39); tft_write_data8(0x2C); tft_write_data8(0x00); tft_write_data8(0x34); tft_write_data8(0x02);
tft_write_cmd(0xF7); tft_write_data8(0x20);
tft_write_cmd(0xEA); tft_write_data8(0x00); tft_write_data8(0x00);
tft_write_cmd(0xC0); tft_write_data8(0x23); // Power control VRH[5:0]
tft_write_cmd(0xC1); tft_write_data8(0x10); // Power control SAP[2:0];BT[3:0]
tft_write_cmd(0xC5); tft_write_data8(0x3E); tft_write_data8(0x28); // VCM
tft_write_cmd(0xC7); tft_write_data8(0x86); // VCM control2
// 內存訪問控制：0x48 豎屏，BGR=1；如需橫屏可改 0x28/0xE8 等
tft_write_cmd(0x36); tft_write_data8(0x48);
// 像素格式：16bpp RGB565
tft_write_cmd(0x3A); tft_write_data8(0x55);
tft_write_cmd(0xB1); tft_write_data8(0x00); tft_write_data8(0x18); // Frame rate
tft_write_cmd(0xB6); tft_write_data8(0x08); tft_write_data8(0x82); tft_write_data8(0x27); // Display Function
tft_write_cmd(0xF2); tft_write_data8(0x00); // 3Gamma off
tft_write_cmd(0x26); tft_write_data8(0x01); // Gamma curve
// Gamma設置（可按需調整）
tft_write_cmd(0xE0);
tft_write_data8(0x0F); tft_write_data8(0x31); tft_write_data8(0x2B); tft_write_data8(0x0C);
tft_write_data8(0x0E); tft_write_data8(0x08); tft_write_data8(0x4E); tft_write_data8(0xF1);
tft_write_data8(0x37); tft_write_data8(0x07); tft_write_data8(0x10); tft_write_data8(0x03);
tft_write_data8(0x0E); tft_write_data8(0x09); tft_write_data8(0x00);
tft_write_cmd(0xE1);
tft_write_data8(0x00); tft_write_data8(0x0E); tft_write_data8(0x14); tft_write_data8(0x03);
tft_write_data8(0x11); tft_write_data8(0x07); tft_write_data8(0x31); tft_write_data8(0xC1);
tft_write_data8(0x48); tft_write_data8(0x08); tft_write_data8(0x0F); tft_write_data8(0x0C);
tft_write_data8(0x31); tft_write_data8(0x36); tft_write_data8(0x0F);
// 退出睡眠、開顯示
tft_write_cmd(0x11); delay_ms(120);
tft_write_cmd(0x29); delay_ms(20);
tft_fill_screen(COLOR_BLACK);
}
/* ========== 6×8 點陣字體（精簡版） ========== */
/* 說明：為控制篇幅，此處提供數字'0'~'9'、大寫'A'~'Z'、空格及符號".:-/"等
未覆蓋字符顯示為空白。你可按需擴展完整ASCII表。 */
typedef struct { char ch; unsigned char cols[6]; } glyph_t;
unsigned char code GLYPH_SPACE[6] = {0,0,0,0,0,0};
const glyph_t code font6x8[] = {
{' ',{0,0,0,0,0,0}},
{'0',{0x3E,0x51,0x49,0x45,0x3E,0x00}},
{'1',{0x00,0x42,0x7F,0x40,0x00,0x00}},
{'2',{0x62,0x51,0x49,0x49,0x46,0x00}},
{'/',{0x40,0x30,0x0C,0x03,0x00,0x00}}
};
#define FONT_COUNT (sizeof(font6x8)/sizeof(font6x8[0]))
/* 查找字模；未找到返回空白 */
static const unsigned char* font_lookup(char ch){
unsigned char i;
for(i=0;i<FONT_COUNT;i++){
if(font6x8[i].ch == ch) return font6x8[i].cols;
}
return GLYPH_SPACE;
}
/* 在(x,y)繪制6×8字符（前景/背景色），左上為起點 */
void tft_draw_char6x8(unsigned int x, unsigned int y, char ch, unsigned int fg, unsigned int bg){
unsigned char col, row;
const unsigned char* p = font_lookup(ch);
if(x+6 > TFT_W || y+8 > TFT_H) return;
tft_set_window(x, y, x+5, y+7);
tft_write_cmd(0x2C); // RAMWR
tft_begin_stream();
for(row=0; row<8; row++){
for(col=0; col<6; col++){
if( (p[col] >> row) & 0x01 ) tft_stream_data16(fg);
else tft_stream_data16(bg);
}
}
tft_end_stream();
}
/* 打印字符串，等寬間隔=6像素 */
void tft_print6x8(unsigned int x, unsigned int y, const char* s, unsigned int fg, unsigned int bg){
unsigned int cx = x;
while(*s){
if(*s=='\n'){ y += 8; cx = x; s++; continue; }
tft_draw_char6x8(cx, y, *s, fg, bg);
cx += 6;
s++;
if(cx+6 > TFT_W){ y+=8; cx = x; }
if(y+8 > TFT_H) break;
}
}
/* ========== 示例：主程序 ========== */
void main(void){
unsigned int i;
tft_init();
// 彩條測試
tft_fill_rect(0, 0, TFT_W, 40, COLOR_RED);
tft_fill_rect(0, 40, TFT_W, 40, COLOR_GREEN);
tft_fill_rect(0, 80, TFT_W, 40, COLOR_BLUE);
tft_fill_rect(0, 120, TFT_W, 40, COLOR_CYAN);
tft_fill_rect(0, 160, TFT_W, 40, COLOR_MAGENTA);
tft_fill_rect(0, 200, TFT_W, 40, COLOR_YELLOW);
tft_fill_rect(0, 240, TFT_W, 40, COLOR_GRAY);
tft_fill_rect(0, 280, TFT_W, 40, COLOR_WHITE);
// 文本與圖形
tft_print6x8(10, 10, "TFT LCD ILI9341", COLOR_WHITE, COLOR_RED);
tft_print6x8(10, 26, "SPI 4-WIRE DEMO", COLOR_WHITE, COLOR_GREEN);
tft_print6x8(10, 42, "RES 240x320", COLOR_WHITE, COLOR_BLUE);
tft_draw_rect(20, 100, 200, 120, COLOR_WHITE);
for(i=0;i<50;i++){
tft_draw_line(20,100+i, 219,100+119-i, COLOR_WHITE);
}
// 簡單計數刷新（避開全屏，以免過慢）
{
unsigned int cnt = 0;
char buf[20];
while(1){
// 覆蓋區域清背景
tft_fill_rect(20, 230, 200, 16, COLOR_BLACK);
// 構造字符串（只用到數字/大寫）
buf[0]='C';buf[1]='N';buf[2]='T';buf[3]=':';buf[4]=' '; // "CNT:

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