Diff: SPI_TFT_ILI9341.cpp

Revision:

6:fe07ae8329f7

Parent:

5:55aed13f2630

Child:

7:4c30bea883bc

--- a/SPI_TFT_ILI9341.cpp	Tue Oct 22 20:55:39 2013 +0000
+++ b/SPI_TFT_ILI9341.cpp	Sun Jan 26 16:58:45 2014 +0000
@@ -14,19 +14,20 @@
 // 14.07.13 Test with real display and bugfix 
 // 18.10.13 Better Circle function from Michael Ammann
 // 22.10.13 Fixes for Kinetis Board - 8 bit spi
+// 26.01.14 Change interface for BMP_16 to also use SD-cards
 
 #include "SPI_TFT_ILI9341.h"
 #include "mbed.h"
 
 #define BPP         16                  // Bits per pixel    
-            
-
+         
 //extern Serial pc;
 //extern DigitalOut xx;     // debug !!
 
 SPI_TFT_ILI9341::SPI_TFT_ILI9341(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset, PinName dc, const char *name)
     : _spi(mosi, miso, sclk), _cs(cs), _reset(reset), _dc(dc), GraphicsDisplay(name)
 {
+    clk = sclk;
     orientation = 0;
     char_x = 0;
     tft_reset();
@@ -88,18 +89,53 @@
 
 
 
-// the ILI9341 can read - has to be implemented later
-// A read will return 0 at the moment
+// the ILI9341 can read 
+
+char SPI_TFT_ILI9341::rd_byte(unsigned char cmd)
+{
+    char r;
+    _dc = 0;
+    _cs = 0;
+    _spi.write(cmd);      // mbed lib
+    _cs = 1;
+    r = _spi.write(0xff);
+    _cs = 1;    
+    return(r);
+}
 
-//unsigned short SPI_TFT_ILI9341::rd_dat (void)
-//{
-//    unsigned short val = 0;
+// read 32 bit
+int SPI_TFT_ILI9341::rd_32(unsigned char cmd)
+{
+    int d;
+    char r;
+    _dc = 0;
+    _cs = 0;
+    d = cmd;
+    d = d << 1;
+    _spi.format(9,3);    // we have to add a dummy clock cycle
+    _spi.write(d);
+    _spi.format(8,3);   
+    _dc = 1;
+    r = _spi.write(0xff);
+    d = r;
+    r = _spi.write(0xff);
+    d = (d << 8) | r;
+    r = _spi.write(0xff);
+    d = (d << 8) | r;
+    r = _spi.write(0xff);
+    d = (d << 8) | r;
+    _cs = 1;    
+    return(d);
+}
 
-    //val = _spi.write(0x73ff);                /* Dummy read 1           */
-    //val   = _spi.write(0x0000);              /* Read D8..D15           */
-//    return (val);
-//}
-
+int  SPI_TFT_ILI9341::Read_ID(void){
+    int r;
+    r = rd_byte(0x0A);
+    r = rd_byte(0x0A);
+    r = rd_byte(0x0A);
+    r = rd_byte(0x0A);
+    return(r);
+}
 
 
 // Init code based on MI0283QT datasheet
@@ -107,7 +143,7 @@
 void SPI_TFT_ILI9341::tft_reset()
 {
     _spi.format(8,3);                  // 8 bit spi mode 3
-    _spi.frequency(10000000);          // 10 Mhz SPI clock
+    _spi.frequency(20000000);          // 10 Mhz SPI clock
     _cs = 1;                           // cs high
     _dc = 1;                           // dc high 
     _reset = 0;                        // display reset
@@ -686,8 +722,7 @@
 }
 
 
-// local filesystem is not implemented in kinetis board
-#ifndef TARGET_KL25Z
+// local filesystem is not implemented in kinetis board , but you can add a SD card
 
 int SPI_TFT_ILI9341::BMP_16(unsigned int x, unsigned int y, const char *Name_BMP)
 {
@@ -707,15 +742,12 @@
     unsigned short *line;
 
     // get the filename
-    LocalFileSystem local("local");
-    sprintf(&filename[0],"/local/");
-    i=7;
+    i=0;
     while (*Name_BMP!='\0') {
         filename[i++]=*Name_BMP++;
     }
-
-    fprintf(stderr, "filename : %s \n\r",filename);
-
+    filename[i] = 0;  
+    
     FILE *Image = fopen((const char *)&filename[0], "rb");  // open the bmp file
     if (!Image) {
         return(0);      // error file not found !
@@ -754,17 +786,22 @@
         padd ++;
     } while ((PixelWidth * 2 + padd)%4 != 0);
 
-
-//fseek(Image, 70 ,SEEK_SET);
     window(x, y,PixelWidth ,PixelHeigh);
-    wr_cmd(0x2C);  // send pixel 
-    _spi.format(16,3);                            // switch to 16 bit Mode 3
+    wr_cmd(0x2C);  // send pixel
+    #ifndef TARGET_KL25Z // only 8 Bit SPI 
+    _spi.format(16,3);  
+    #endif                          // switch to 16 bit Mode 3
     for (j = PixelHeigh - 1; j >= 0; j--) {               //Lines bottom up
         off = j * (PixelWidth  * 2 + padd) + start_data;   // start of line
         fseek(Image, off ,SEEK_SET);
-        fread(line,1,PixelWidth * 2,Image);       // read a line - slow !
+        fread(line,1,PixelWidth * 2,Image);       // read a line - slow 
         for (i = 0; i < PixelWidth; i++) {        // copy pixel data to TFT
+        #ifndef TARGET_KL25Z // only 8 Bit SPI
             _spi.write(line[i]);                  // one 16 bit pixel
+        #else  
+            _spi.write(line[i] >> 8);
+            _spi.write(line[i]);
+        #endif    
         } 
      }
     _cs = 1;
@@ -774,4 +811,3 @@
     WindowMax();
     return(1);
 }
-#endif
\ No newline at end of file