Diff: EAOLED.cpp

Revision:

0:f42b25503fd1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EAOLED.cpp	Sun Feb 28 16:04:59 2010 +0000
@@ -0,0 +1,101 @@
+// test library for Embedded Artists OLED used on Xpresso Baseboard
+
+#include "EAOLED.h"
+#include "mbed.h"
+
+EAOLED::EAOLED(PinName mosi, PinName dnc, PinName sclk, PinName cs, PinName power) 
+    : _spi(mosi, NC, sclk), _data(dnc), _cs(cs), _power(power) {
+    reset();    
+}
+      
+void EAOLED::command(int value) {
+    _data = 0;
+    _cs = 0;
+    _spi.write(value);
+    _cs = 1;
+}
+
+void EAOLED::data(int value) {
+    _data = 1;
+    _cs = 0;
+    _spi.write(value);
+    _cs = 1;
+}
+
+void EAOLED::reset() {
+    _power = 0;
+    _cs = 1;
+
+    // Startup sequence recommended by embedded artists baseboard reference code
+    command(0x02); // set low column address
+    command(0x12); // set high column address
+    command(0x40); // display start set
+    command(0x2e); // stop horzontal scroll
+    command(0x81); // set contrast control register
+    command(0x32); //
+    command(0x82); // brightness for color banks
+    command(0x80); // display on
+    command(0xa1); // set segment re-map
+    command(0xa6); // set normal/inverse display
+    command(0xa8); // set multiplex ratio
+    command(0x3F); //
+    command(0xd3); // set display offset
+    command(0x40); //
+    command(0xad); // set dc-dc on/off
+    command(0x8E); //
+    command(0xc8); // set com output scan direction
+    command(0xd5); // set display clock divide ratio/oscillator/frequency
+    command(0xf0); //
+    command(0xd8); // set area color mode on/off & low power display mode 
+    command(0x05); //
+    command(0xd9); // set pre-charge period
+    command(0xF1); //
+    command(0xda); // set com pins hardware configuration
+    command(0x12); //
+    command(0xdb); // set vcom deselect level
+    command(0x34); //
+    command(0x91); // set look up table for area color 
+    command(0x3f); //
+    command(0x3f); //
+    command(0x3f); //
+    command(0x3f); //
+    command(0xaf); // display on
+    command(0xa4); // display on
+
+    wait_us(10);
+
+    _power = 1;
+}
+
+#define OLED_DISPLAY_WIDTH  96
+#define OLED_DISPLAY_HEIGHT 64
+
+void EAOLED::pixel(int x, int y, int colour) {
+    int page = y >> 3;
+    int address = 18 + x;
+    
+    int lo = (address >> 0) & 0x0F;
+    int hi =  (address >> 4) | 0x10;
+    int mask = 1 << (y & 0x7);
+    int byte = page * OLED_DISPLAY_WIDTH + x;
+    
+    if(colour) {
+        framebuffer[byte] |= mask;
+    } else {
+        framebuffer[byte] &= ~mask;
+    }
+
+    command(0xB0 + page);
+    command(lo);
+    command(hi);
+    data(framebuffer[byte]);
+}
+
+/*void EAOLED::cls() {
+    for(int y=0; y<64; y++) {
+        for (int x=0; x<96; x++) {
+            pixel(x, y, 0xFFFFFF);
+        }
+    }
+}*/
+