Diff: tft.cpp

Revision:

0:8f8765c8b7bd

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tft.cpp	Sun Nov 13 17:59:38 2016 +0000
@@ -0,0 +1,295 @@
+/*===================================================================*/
+/*                                                                   */
+/*  tft.cpp : TFT(ILI9341) function                                  */
+/*                                                                   */
+/*  2016/1/20  Racoon                                                */
+/*                                                                   */
+/*===================================================================*/
+
+//#define OLD_BOARD (1)
+
+#include "mbed.h"
+#include "tft.h"
+
+#ifdef OLD_BOARD
+DigitalOut cs(PB_5, PullUp); // TFT chipselect pin
+DigitalOut back(PC_3);
+#else
+DigitalOut cs(PC_7, PullUp); // TFT chipselect pin
+DigitalOut back(PC_9);
+#endif
+
+DigitalOut dc(PA_8, PullUp); // TFT data command select pin
+DigitalOut rst(PA_10,PullUp); // TFT reset pin
+ 
+
+void set_back(int flag)
+{
+ back = flag ;
+ }
+ 
+ 
+/*-------------------------------------------------------------------*/
+/*  Write command                                                    */
+/*-------------------------------------------------------------------*/
+void write_cmd(uint8_t cmd)
+{
+    dc = 0;
+    spi_write(cmd);
+}
+  
+/*-------------------------------------------------------------------*/
+/*  Write data                                                       */
+/*-------------------------------------------------------------------*/
+void write_data(uint8_t data)
+{
+    dc = 1;
+    spi_write(data);
+}
+
+/*-------------------------------------------------------------------*/
+/*  TFT reset                                                        */
+/*-------------------------------------------------------------------*/
+void tft_reset()
+{
+    wait_ms(200);
+    cs = 1;
+    dc = 1;
+    rst = 1;
+    wait_ms(200);
+    rst = 0;
+    wait_us(10);
+    rst = 1;
+    wait_ms(120);
+    cs = 0;
+    wait_ms(10);
+        
+    write_cmd(0x3A); // Pixel Format    
+    write_data(0x55); // 16bit Color
+    
+    write_cmd(0xB1); // Frame Control    
+    write_data(0);
+    write_data(0x1f);
+        
+    write_cmd(0x36); // Memory Access Control 
+#ifdef OLD_BOARD
+    write_data(0xE8); // MY MX MV BGR
+#else
+    write_data(0x28); // MY MX MV BGR
+#endif
+
+    write_cmd(0x11); // Sleep Out
+    wait_ms(5);
+        
+    write_cmd(0x29); // Display On    
+}
+
+/*-------------------------------------------------------------------*/
+/*  Set windows size, start memory write                             */
+/*-------------------------------------------------------------------*/
+void tft_set_window(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
+{
+  write_cmd(0x2A); // Column Address Set
+  write_data(x0 >> 8);
+  write_data(x0);
+  write_data(x1 >> 8);
+  write_data(x1);
+
+  write_cmd(0x2B); // Page Address Set
+  write_data(y0 >> 8);
+  write_data(y0);
+  write_data(y1 >> 8);
+  write_data(y1);
+
+  write_cmd(0x2C); // Memory Write
+  
+  wait_us(20);
+  
+  dc = 1;
+}
+
+/*-------------------------------------------------------------------*/
+/*  Clear screen                                                     */
+/*-------------------------------------------------------------------*/
+void tft_clear(uint16_t color)
+{
+    tft_set_window(0, 0, TFT_WIDTH, TFT_HEIGHT);
+
+    for (int i = 0; i < TFT_WIDTH * TFT_HEIGHT; ++i)
+    {
+        spi_writew(color);
+    }    
+}
+
+/*-------------------------------------------------------------------*/
+/*  Put char                                                         */
+/*-------------------------------------------------------------------*/
+void tft_put_char(int x, int y, char chr, uint16_t color, uint16_t bgcolor)
+{
+    if (chr < 0x20 || chr > 0x7f)
+    {
+        chr = 0x3f;
+    }
+    else
+    {
+        chr = (chr < 0x60) ? chr - 0x20 : chr - 0x40;
+    }
+        
+    tft_set_window(x, y, x + 7, y + 6);
+    
+    for (int dy = 0; dy < 7; ++dy)
+    {
+        unsigned char img = chrimg[chr][dy];
+        for ( int dx = 0; dx < 8; ++dx)
+        {
+            if (img & 0x80)
+            {
+                spi_writew(color);
+            }
+            else
+            {
+                spi_writew(bgcolor);                
+            }
+            img <<= 1;
+        }
+    }    
+    
+}
+ 
+/*-------------------------------------------------------------------*/
+/*  Text out                                                         */
+/*-------------------------------------------------------------------*/
+void tft_text(int x, int y, char *text, uint16_t color, uint16_t bgcolor)
+{
+    while (*text != 0)
+    {
+        tft_put_char(x, y, *text, color, bgcolor);
+        x += 8;
+        text++;
+    }
+}
+
+/*-------------------------------------------------------------------*/
+/*  Horizontal Line                                                        */
+/*-------------------------------------------------------------------*/
+void tft_hline(int x1, int y, int x2, uint16_t color)
+{
+    tft_set_window(x1, y, x2, y);
+    
+    for (;x1 < x2; ++x1)
+    {
+        spi_writew(color);
+    }
+}
+
+/*-------------------------------------------------------------------*/
+/*  Vertical Line                                                        */
+/*-------------------------------------------------------------------*/
+void tft_vline(int x, int y1, int y2, uint16_t color)
+{
+    tft_set_window(x, y1, x, y2);
+    
+    for (;y1 < y2; ++y1)
+    {
+        spi_writew(color);
+    }
+}
+
+/*-------------------------------------------------------------------*/
+/*  Box                                                              */
+/*-------------------------------------------------------------------*/
+void tft_box(int x1, int y1, int x2, int y2, uint16_t color)
+{
+    tft_hline(x1, y1, x2, color);
+    tft_vline(x1, y1, y2, color);
+    tft_vline(x2, y1, y2, color);
+    tft_hline(x1, y2, x2, color);
+}
+
+/*-------------------------------------------------------------------*/
+/*  Box Fill                                                        */
+/*-------------------------------------------------------------------*/
+void tft_boxfill(int x1, int y1, int x2, int y2, uint16_t color)
+{
+    tft_set_window(x1, y1, x2, y2);
+    
+    for (int i = 0; i < (x2 - x1 + 1) * (y2 - y1 + 1); ++i)
+    {
+        spi_writew(color);
+    }
+}
+
+/*-------------------------------------------------------------------*/
+/*  Draw 4bit BMP                                                    */
+/*-------------------------------------------------------------------*/
+bool draw_bmp_4bpp(const unsigned char *imgdata, int x, int y)
+{
+    BITMAPFILEHEADER *bf = (BITMAPFILEHEADER *)imgdata;
+    BITMAPINFOHEADER *bi = (BITMAPINFOHEADER *)(imgdata + sizeof(BITMAPFILEHEADER));
+       
+    if (bi->biBitCount != 4)
+    {
+        return false;
+    }
+
+    unsigned char *pRGBPal = (unsigned char*)imgdata + sizeof(BITMAPFILEHEADER) + bi->biSize;
+    unsigned short palette[16];
+
+    for (int i = 0; pRGBPal < imgdata + bf->bfOffBits && i < 16; ++i)
+    {
+        unsigned short r,g,b;  
+        b = *pRGBPal++ >> 3;
+        g = *pRGBPal++ >> 2;
+        r = *pRGBPal++ >> 3;
+        pRGBPal++;
+        palette[i] = ((g & 7) << 13) | (b << 8) | (r << 3) | (g >> 3);
+    }
+
+    unsigned short HLine[320];
+    int linesize = (bi->biWidth / 2 + 3) & 0xfffc;
+        
+    tft_set_window(x, y, x + bi->biWidth - 1, y + bi->biHeight - 1);
+    
+    unsigned char *bmp;
+    
+    for (int y = bi->biHeight - 1; y >= 0; --y)
+    {
+        bmp = (unsigned char *)imgdata + bf->bfOffBits + y * linesize; 
+        
+        for (int x = 0; x < bi->biWidth; ++x)
+        {
+            char pal;
+            if (x & 1)
+            {
+                pal = *bmp & 0xf;
+                bmp++;
+            }
+            else
+            {
+                pal = *bmp >> 4;
+            }
+                
+            HLine[x] = palette[pal];
+        }
+    
+        HAL_SPI_Transmit(&SpiHandle, (uint8_t *)HLine, bi->biWidth * 2, 100);
+    }
+
+    return true;
+}
+ 
+/*-------------------------------------------------------------------*/
+/*  Initialize TFT                                                   */
+/*-------------------------------------------------------------------*/
+void tft_init(void)
+{
+    
+    back=0;
+    spi_init();
+        
+    tft_reset();
+}
+
+
+
+