Karl Zweimüller / UniGraphic

UniGraphic-Fork for ST7920-LCD-controller and SH1106. Tested with 128x64 LCD with SPI and 128x64-OLED with IIC

Dependents:   UniGraphic-St7920-Test AfficheurUTILECO

Fork of UniGraphic by GraphicsDisplay

Fork of the UniGraphic-Library for monochrome LCDs with ST7920 controller and 128x64-IIC-OLED-Display with SH1106-Controller

/media/uploads/charly/20170522_210344.jpg

/media/uploads/charly/20180425_230623.jpg

Had to adapt LCD for following reasons:

  • Give access to screenbuffer buffer[] to parent class
  • pixel() and pixel_read() as they are hardware-dependent
  • added reset-pin to IIC-Interface

GraphicDisplay:: sends buffer to LCD when auto_update is set to true.

Testprogram for ST7920 can be found here:

https://developer.mbed.org/users/charly/code/UniGraphic-St7920-Test/

Files at this revision

API Documentation at this revision

Revision 38:1b6f9fc49a03, committed 2018-10-30

Comitter:
charly
Date:
Tue Oct 30 20:00:29 2018 +0000
Parent:
37:5de028b08308
Commit message:
some modifications.

Changed in this revision

Display/LCD.cpp Show annotated file Show diff for this revision Revisions of this file
Display/LCD.h Show annotated file Show diff for this revision Revisions of this file
Inits/SH1106.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/Display/LCD.cpp	Wed Apr 25 20:55:59 2018 +0000
+++ b/Display/LCD.cpp	Tue Oct 30 20:00:29 2018 +0000
@@ -35,7 +35,9 @@
 {
     if(displayproto==PAR_8) proto = new PAR8(port, CS, reset, DC, WR, RD);  
     useNOP=false;
-    buffer = (unsigned char*) malloc (screensize_X*_LCDPAGES);
+    //buffer = (unsigned char*) malloc (screensize_X*_LCDPAGES);
+    //posix_memalign(void **memptr, size_t alignment, size_t size);
+    posix_memalign((void **)&buffer, 16,screensize_X*_LCDPAGES);
     buffer16 = (unsigned short*)buffer;
     draw_mode = NORMAL;
     set_orientation(1);
@@ -59,7 +61,9 @@
         proto = new BUS8(pins, CS, reset, DC, WR, RD);
     }
     useNOP=false;
-    buffer = (unsigned char*) malloc (screensize_X*_LCDPAGES);
+    //buffer = (unsigned char*) malloc (screensize_X*_LCDPAGES);
+    //posix_memalign(void **memptr, size_t alignment, size_t size);
+    posix_memalign((void **)&buffer, 16,screensize_X*_LCDPAGES);
     buffer16 = (unsigned short*)buffer;
     draw_mode = NORMAL;
     set_orientation(1);
@@ -83,7 +87,9 @@
         proto = new SPI16(Hz, mosi, miso, sclk, CS, reset, DC);
         useNOP=true;
     }
-    buffer = (unsigned char*) malloc (screensize_X*_LCDPAGES);
+    //buffer = (unsigned char*) malloc (screensize_X*_LCDPAGES);
+    //posix_memalign(void **memptr, size_t alignment, size_t size);
+    posix_memalign((void **)&buffer, 16,screensize_X*_LCDPAGES);
     buffer16 = (unsigned short*)buffer;
     draw_mode = NORMAL;
   //  cls();
@@ -101,8 +107,11 @@
         proto = new I2C_bus(Hz,address,sda,scl, reset);
         useNOP=false;
         }
-    buffer = (unsigned char*) malloc (screensize_X*_LCDPAGES);
+    //buffer = (unsigned char*) malloc (screensize_X*_LCDPAGES);
+    //posix_memalign(void **memptr, size_t alignment, size_t size);
+    posix_memalign((void **)&buffer, 16,screensize_X*_LCDPAGES);
     buffer16 = (unsigned short*)buffer;
+    
     draw_mode = NORMAL;
   //  cls();
     set_orientation(1);
@@ -283,8 +292,10 @@
         lenght--;
     }
 }
+
 void LCD::pixel(int x, int y, unsigned short color)
 {
+    /*
     if(!(orientation&1)) SWAP(x,y);
     // first check parameter
     if((x >= screensize_X) || (y >= screensize_Y)) return;
@@ -296,10 +307,12 @@
     //buffer[0]=0xFF;
     //buffer[16]=0xAA;
     //buffer[1023]=0xFF;
+*/
+}
 
-}
 unsigned short LCD::pixelread(int x, int y)
 {
+    /*
     if(!(orientation&1)) SWAP(x,y);
     // first check parameter
     if((x >= screensize_X) || (y >= screensize_Y)) return 0;
@@ -307,9 +320,12 @@
     
     if((buffer[(x>>3)+(y*_IC_X_SEGS>>4)] & (1 << (7-(x&7))))==0) return 0xFFFF ;  // pixel not set, White
     else return 0; // pixel set, Black
+    */
+    return 0;
 }
 void LCD::copy_to_lcd(void)
 {
+    /*
     unsigned short i=0;
     unsigned short setcolcmd = 0x0010 | ((col_offset&0xF)<<8) | (col_offset>>4);
     for(int page=0; page<_LCDPAGES; page++)
@@ -321,9 +337,11 @@
         wr_grambuf(buffer16+i, screensize_X>>1);   // send whole page pixels
         i+=screensize_X>>1;
     }
+    */
 }
 void LCD::cls(void)
 {
+    /*
     unsigned short tmp = _background^0xFFFF;
     memset(buffer,tmp,screensize_X*_LCDPAGES);  // clear display buffer
     unsigned short setcolcmd = 0x0010 | ((col_offset&0xF)<<8) | (col_offset>>4);
@@ -335,6 +353,7 @@
         wr_cmd8(0xB0|(page+page_offset));      // set page
         wr_gram(tmp, screensize_X>>1);   // send whole page pixels = background
     }
+    */
 }
 int LCD::sizeX()
 {

--- a/Display/LCD.h	Wed Apr 25 20:55:59 2018 +0000
+++ b/Display/LCD.h	Tue Oct 30 20:00:29 2018 +0000
@@ -261,6 +261,7 @@
     int orientation;
     bool useNOP;
   
+    
     unsigned char *buffer;
     unsigned short *buffer16;   
 };

--- a/Inits/SH1106.cpp	Wed Apr 25 20:55:59 2018 +0000
+++ b/Inits/SH1106.cpp	Tue Oct 30 20:00:29 2018 +0000
@@ -1,5 +1,5 @@
 /* mbed UniGraphic library - Device specific class
- * SH1106 by Karl Zweimüller, based on 
+ * SH1106 by Karl Zweimüller, based on
  * SSD1306 by Copyright (c) 2015 Peter Drescher
  * Released under the MIT License: http://mbed.org/license/mit
  */
@@ -46,6 +46,7 @@
     cls();
     set_orientation(1);
     locate(0,0);
+    copy_to_lcd();
 }
 SH1106::SH1106(proto_t displayproto, int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC, const char *name, unsigned int LCDSIZE_X, unsigned  int LCDSIZE_Y)
     : LCD(displayproto, Hz, mosi, miso, sclk, CS, reset, DC, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
@@ -56,6 +57,7 @@
     cls();
     set_orientation(1);
     locate(0,0);
+    copy_to_lcd();
 }
 
 SH1106::SH1106(proto_t displayproto, int Hz, int address, PinName sda, PinName scl, PinName reset, const char* name , unsigned int LCDSIZE_X, unsigned  int LCDSIZE_Y)
@@ -66,6 +68,7 @@
     cls();
     set_orientation(1);
     locate(0,0);
+    copy_to_lcd();
 }
 
 
@@ -155,10 +158,10 @@
 void SH1106::copy_to_lcd(void)
 {
 
-    for(int page=0; page<8 /*_LCDPAGES */; page++) {
+    for(uint8_t page=0; page<8 /*_LCDPAGES */; page++) {
+        wr_cmd8(0xB0+page);        // set page
         wr_cmd8(0x02);             // set column low nibble My Display starts at column 2 (up to column 130 of 132)
         wr_cmd8(0x10);             // set column hi  nibble
-        wr_cmd8(0xB0+page);        // set page
         wr_grambuf(buffer16+(page*screensize_X>>1), screensize_X>>1);   // send whole page pixels as shorts(16bit) not bytes!
     }
 }
@@ -168,7 +171,9 @@
     unsigned short tmp = _background^0xFFFF;
     //memset(buffer,tmp,/*screensize_X*_LCDPAGES*/ 128*64/8);  // clear display buffer
     memset(buffer,0x00,screensize_X*(screensize_Y>>3));  // clear display buffer
-    copy_to_lcd();
+    if (get_auto_up()) {
+        copy_to_lcd();
+    }
 }
 
 void SH1106::mirrorXY(mirror_t mode)
@@ -204,12 +209,10 @@
     //Buffer[(Xpoint + (Ypoint / 8) * sOLED_DIS.OLED_Dis_Column)] |= 1 << (Ypoint % 8);
     //Buffer[(Xpoint + (Ypoint / 8) * sOLED_DIS.OLED_Dis_Column)] |= 0 << (Ypoint % 8);
     if (color) {
-        buffer[x+((y>>3)*screensize_X)] |=  0 << (y % 8);
+        buffer[x+((y>>3)*screensize_X)] |=  1 << (y % 8);
     } else       {
-        buffer[x+((y>>3)*screensize_X)] |=  1 << (y % 8);
+        buffer[x+((y>>3)*screensize_X)] |=  0 << (y % 8);
     }
-
-
 }
 
 
@@ -221,6 +224,6 @@
     //Buffer[(Xpoint + (Ypoint / 8) * sOLED_DIS.OLED_Dis_Column)] |= 1 << (Ypoint % 8);
     //Buffer[(Xpoint + (Ypoint / 8) * sOLED_DIS.OLED_Dis_Column)] |= 0 << (Ypoint % 8);
     if (buffer[x+((y>>3)*screensize_X)] &  1 << (y % 8) == 0)
-        return 0xFFFF ;  // pixel not set, White
-    else return 0; // pixel set, Black
+        return Black ;  // pixel not set, Black
+    else return White; // pixel set, White
 }