Diff: ADA326.cpp

Revision:

0:091e1a699d64

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ADA326.cpp	Mon Jan 07 10:58:16 2019 +0000
@@ -0,0 +1,197 @@
+#include "ADA326.h"
+#include "LCDGraphics.h"
+#include "mbed.h"
+
+
+#define SSD1306_LCDHEIGHT 64
+#define SSD1306_LCDWIDTH 128
+
+#define SSD1306_SETCONTRAST 0x81
+#define SSD1306_DISPLAYALLON_RESUME 0xA4
+#define SSD1306_DISPLAYALLON 0xA5
+#define SSD1306_NORMALDISPLAY 0xA6
+#define SSD1306_INVERTDISPLAY 0xA7
+#define SSD1306_DISPLAYOFF 0xAE
+#define SSD1306_DISPLAYON 0xAF
+
+#define SSD1306_SETDISPLAYOFFSET 0xD3
+#define SSD1306_SETCOMPINS 0xDA
+
+#define SSD1306_SETVCOMDETECT 0xDB
+
+#define SSD1306_SETDISPLAYCLOCKDIV 0xD5
+#define SSD1306_SETPRECHARGE 0xD9
+
+#define SSD1306_SETMULTIPLEX 0xA8
+
+#define SSD1306_SETLOWCOLUMN 0x00
+#define SSD1306_SETHIGHCOLUMN 0x10
+
+#define SSD1306_SETSTARTLINE 0x40
+
+#define SSD1306_MEMORYMODE 0x20
+#define SSD1306_COLUMNADDR 0x21
+#define SSD1306_PAGEADDR   0x22
+
+#define SSD1306_COMSCANINC 0xC0
+#define SSD1306_COMSCANDEC 0xC8
+
+#define SSD1306_SEGREMAP 0xA0
+
+#define SSD1306_CHARGEPUMP 0x8D
+
+#define SSD1306_EXTERNALVCC 0x1
+#define SSD1306_SWITCHCAPVCC 0x2
+
+// Scrolling #defines
+#define SSD1306_ACTIVATE_SCROLL 0x2F
+#define SSD1306_DEACTIVATE_SCROLL 0x2E
+#define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3
+#define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26
+#define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27
+#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
+#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A
+
+#define BLACK 0
+#define WHITE 1
+#define INVERSE 2
+
+
+    
+extern Serial pc;
+DigitalOut reset(D3);
+
+#ifdef _ADA326_VER_I2C_
+#define I2C_ADDR (0x3D << 1)
+extern I2C i2c;
+#endif 
+Ada326::Ada326():
+LCDGraphics(SSD1306_LCDWIDTH,SSD1306_LCDHEIGHT, MAX_PAGE)
+{
+    pc.baud(9600);
+#ifdef _ADA326_VER_I2C_
+    pc.printf("ADA326 : Initialize I2C\r\n");
+    pc.printf("ADA326 : %d x %d\r\n", width, height);
+    i2c.frequency(400000);
+#endif    
+}
+void Ada326::display_on() 
+{
+    initialize();
+}
+void Ada326::display_off()
+{
+    
+#ifdef _ADA326_VER_I2C_
+    i2c.start();  
+#endif    
+    ssd1306_command(SSD1306_DISPLAYOFF);                    // 0xAE
+#ifdef _ADA326_VER_I2C_
+    i2c.stop(); 
+#endif    
+}
+void Ada326::initialize()
+{
+    
+    // Setup reset pin direction (used by both SPI and I2C)
+    reset = 1;
+    // VDD (3.3V) goes high at start, lets just chill for a ms
+    wait_ms(1);
+    // bring reset low
+    reset = 0;
+    // wait 10ms
+    wait_ms(10);
+    // bring out of reset
+    reset = 1;
+    
+#ifdef _ADA326_VER_I2C_
+    i2c.start();  
+#endif    
+    ssd1306_command(SSD1306_DISPLAYOFF);                    // 0xAE
+    ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV);            // 0xD5
+    ssd1306_command(0x80);                                  // the suggested ratio 0x80
+    
+    ssd1306_command(SSD1306_CHARGEPUMP);                    // 0x8D
+    ssd1306_command(0x14);
+    ssd1306_command(SSD1306_MEMORYMODE);                    // 0x20
+    ssd1306_command(0x00);                                  
+    ssd1306_command(SSD1306_COMSCANDEC);                    // Write Pixels Downward.
+    ssd1306_command(SSD1306_SEGREMAP|0x1);                  // Write Pixels Rightward.
+    
+    ssd1306_command(SSD1306_NORMALDISPLAY);
+    ssd1306_command(SSD1306_DISPLAYON);//--turn on oled panel 
+#ifdef _ADA326_VER_I2C_
+    i2c.stop(); 
+#endif    
+}
+// Send command through i2c communication
+void Ada326::ssd1306_command(uint8_t cmd)
+{
+    char data[] = {0x00, cmd};
+    i2c.write(I2C_ADDR, data, 2);
+    wait_us(1);
+}
+// Wipe out all pixels (display pitch black)
+void Ada326::clear(bool show)
+{
+    for (uint16_t page = 0; page < MAX_PAGE; page++)
+        for (uint16_t seg=0; seg < width; seg++) 
+            screen[seg][page] = 0x0;
+    if(show)
+        display();   
+}
+// Renew display
+void Ada326::display()
+{
+    
+#ifdef _ADA326_VER_I2C_
+    i2c.start();  
+#endif    
+    // Let screen know that the entire display is used. (128x64)
+    ssd1306_command(SSD1306_COLUMNADDR);
+    ssd1306_command(0);   // Column start address (0 = reset)
+    ssd1306_command(SSD1306_LCDWIDTH-1); // Column end address (127 = reset)
+
+    ssd1306_command(SSD1306_PAGEADDR);
+    ssd1306_command(0); // Page start address (0 = reset)
+    ssd1306_command(7); // Page end address (8th page)
+
+    // Signal to write pixels on the screen.
+    i2c.write(I2C_ADDR);
+    i2c.write(0x40);
+    wait_us(10);
+    int error;
+    // Write in consecutive manner.
+    for (uint16_t page = 0; page < MAX_PAGE; page++) {
+        for (uint16_t seg=0; seg < width; seg++) {
+#ifdef _ADA326_VER_I2C_
+            error =i2c.write(screen[seg][page]);
+#elif _ADA326_VER_SPI_
+#endif    
+        if (error != 1)
+            pc.printf("Error occured.\r\n");
+        }
+    }
+#ifdef _ADA326_VER_I2C_
+    i2c.stop(); 
+#endif    
+
+}
+uint16_t Ada326::getWidth()
+{
+    return SSD1306_LCDWIDTH;
+}
+uint16_t Ada326::getHeight()
+{
+    return SSD1306_LCDHEIGHT;
+}
+// Replicate screen on the pc terminal. (Debugging purpose)
+void Ada326::serial_display()
+{
+      for (uint16_t y = 0; y < height; y++) {
+           for (uint16_t x = 0; x < width; x++) {
+             pc.printf("%d", (screen[x][y / page] >> y % com_per_page) & 0x1);
+        }
+        pc.printf("\r\n");
+    }
+}
\ No newline at end of file