From aea7eb169e8e58a76ae54e8c1715c48712049861 Mon Sep 17 00:00:00 2001
From: Daniel Eichhorn <dani.eichhorn@squix.ch>
Date: Sat, 5 Dec 2015 22:24:38 +0100
Subject: [PATCH] Fixed issue #2 with screen misalignment after mcu reset
---
ssd1306_i2c.cpp | 73 +++++++++++++++++++++----------------------------
ssd1306_i2c.h | 27 ++++++++++++++++++
2 files changed, 58 insertions(+), 42 deletions(-)
diff --git a/ssd1306_i2c.cpp b/ssd1306_i2c.cpp
index 119f0f5..77f4866 100644
--- a/ssd1306_i2c.cpp
+++ b/ssd1306_i2c.cpp
@@ -80,6 +80,13 @@ void SSD1306::clear(void) {
}
void SSD1306::display(void) {
+ sendCommand(COLUMNADDR);
+ sendCommand(0x0);
+ sendCommand(0x7F);
+
+ sendCommand(PAGEADDR);
+ sendCommand(0x0);
+ sendCommand(0x7);
for (uint16_t i=0; i<(128*64/8); i++) {
// send a bunch of data in one xmission
@@ -292,52 +299,34 @@ void SSD1306::sendCommand(unsigned char com)
void SSD1306::sendInitCommands(void)
{
- // Init sequence from https://github.com/adafruit/Adafruit_SSD1306/blob/master/Adafruit_SSD1306.cpp
- sendCommand(0xae); //display off
- sendCommand(0xa6); //Set Normal Display (default)
- // Init sequence for 128x64 OLED module
- sendCommand(0xAE); //DISPLAYOFF
- sendCommand(0xD5); //SETDISPLAYCLOCKDIV
- sendCommand(0x80); // the suggested ratio 0x80
- sendCommand(0xA8); //SSD1306_SETMULTIPLEX
+
+ sendCommand(DISPLAYOFF);
+ sendCommand(NORMALDISPLAY);
+ sendCommand(SETDISPLAYCLOCKDIV);
+ sendCommand(0x80);
+ sendCommand(SETMULTIPLEX);
sendCommand(0x3F);
- sendCommand(0xD3); //SETDISPLAYOFFSET
- sendCommand(0x0); //no offset
- sendCommand(0x40 | 0x0); //SETSTARTLINE
- sendCommand(0x8D); //CHARGEPUMP
+ sendCommand(SETDISPLAYOFFSET);
+ sendCommand(0x00);
+ sendCommand(SETSTARTLINE | 0x00);
+ sendCommand(CHARGEPUMP);
sendCommand(0x14);
- sendCommand(0x20); //MEMORYMODE
- sendCommand(0x00); //0x0 act like ks0108
-
- //sendCommand(0xA0 | 0x1); //SEGREMAP //Rotate screen 180 deg
- sendCommand(0xA0);
-
- //sendCommand(0xC8); //COMSCANDEC Rotate screen 180 Deg
- sendCommand(0xC0);
-
- sendCommand(0xDA); //0xDA
- sendCommand(0x12); //COMSCANDEC
- sendCommand(0x81); //SETCONTRAS
- sendCommand(0xCF); //
- sendCommand(0xd9); //SETPRECHARGE
- sendCommand(0xF1);
- sendCommand(0xDB); //SETVCOMDETECT
+ sendCommand(MEMORYMODE);
+ sendCommand(0x00);
+ sendCommand(SEGREMAP);
+ sendCommand(COMSCANINC);
+ sendCommand(SETCOMPINS);
+ sendCommand(0x12);
+ sendCommand(SETCONTRAST);
+ sendCommand(0xCF);
+ sendCommand(SETPRECHARGE);
+ sendCommand(0xF1);
+ sendCommand(SETVCOMDETECT);
sendCommand(0x40);
- sendCommand(0xA4); //DISPLAYALLON_RESUME
- sendCommand(0xA6); //NORMALDISPLAY
-
+ sendCommand(DISPLAYALLON_RESUME);
+ sendCommand(NORMALDISPLAY);
sendCommand(0x2e); // stop scroll
- //----------------------------REVERSE comments----------------------------//
- // sendCommand(0xa0); //seg re-map 0->127(default)
- // sendCommand(0xa1); //seg re-map 127->0
- // sendCommand(0xc8);
- // delay(1000);
- //----------------------------REVERSE comments----------------------------//
- // sendCommand(0xa7); //Set Inverse Display
- // sendCommand(0xae); //display off
- sendCommand(0x20); //Set Memory Addressing Mode
- sendCommand(0x00); //Set Memory Addressing Mode ab Horizontal addressing mode
- //sendCommand(0x02); // Set Memory Addressing Mode ab Page addressing mode(RESET)
+ sendCommand(DISPLAYON);
}
diff --git a/ssd1306_i2c.h b/ssd1306_i2c.h
index e1f02c2..59cbb74 100644
--- a/ssd1306_i2c.h
+++ b/ssd1306_i2c.h
@@ -54,6 +54,33 @@ const char inactive_bits[] PROGMEM = {
#define TEXT_ALIGN_CENTER 1
#define TEXT_ALIGN_RIGHT 2
+#define CHARGEPUMP 0x8D
+#define COLUMNADDR 0x21
+#define COMSCANDEC 0xC8
+#define COMSCANINC 0xC0
+#define DISPLAYALLON 0xA5
+#define DISPLAYALLON_RESUME 0xA4
+#define DISPLAYOFF 0xAE
+#define DISPLAYON 0xAF
+#define EXTERNALVCC 0x1
+#define INVERTDISPLAY 0xA7
+#define MEMORYMODE 0x20
+#define NORMALDISPLAY 0xA6
+#define PAGEADDR 0x22
+#define SEGREMAP 0xA0
+#define SETCOMPINS 0xDA
+#define SETCONTRAST 0x81
+#define SETDISPLAYCLOCKDIV 0xD5
+#define SETDISPLAYOFFSET 0xD3
+#define SETHIGHCOLUMN 0x10
+#define SETLOWCOLUMN 0x00
+#define SETMULTIPLEX 0xA8
+#define SETPRECHARGE 0xD9
+#define SETSEGMENTREMAP 0xA1
+#define SETSTARTLINE 0x40
+#define SETVCOMDETECT 0xDB
+#define SWITCHCAPVCC 0x2
+
class SSD1306 {
private:
--
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