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58 lines
2.0 KiB
Plaintext
58 lines
2.0 KiB
Plaintext
# OLED for AVR mikrocontrollers
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Library for oled-displays with SSD1306 or SH1106 display-controller connected with I2C at an AVR Atmel Atmega like Atmega328P.
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This library allows you to display text or/and graphic at oled-display.
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The library need 1591 bytes flash-memory and 2 bytes sram in textmode, in graphicmode library need 2823 bytes flash-memory and 1026 bytes static sram so you can use oled-displays e.g with Atmega48PA (only with textmode).
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Library is only tested with 128x64 Pixel display, lower resolution not tested but should work too.
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If you want to use your own I2C library you have to fit i2c-function at lcd-library.
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Settings for I2C-bus have to set at i2c.h
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Settings for display have to set at lcd.h
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If you want to use characters like e.g. ä set your compiler input-charset to utf-8 and your compiler exec-charset to iso-8859-15 (look at makefile line 115).
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Testcondition: Display: SSD1306 OLED, Compiler Optimizelevel: -Os, µC: Atmega328p @ 8 MHz internal RC
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Memory:
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Modul | Flash | Stat. RAM
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------------+--------------+------------
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I2C-Core | 120 Byte | 0
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FONT | 644 Byte | 0
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Oled (TXT) | 1303 Byte | 2 Byte
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Oled (GFX) | 2293 Byte | 1026 Byte
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Speed (print 20 charaters to display):
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Mode | Time | I2C-Speed
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------------+------------+------------
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Oled (TXT) | 4.411 ms | 400 kHz
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Oled (TXT) | 15.384 ms | 100 kHz
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Oled (GFX) | 26.603 ms | 400 kHz
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Oled (GFX) | 96.294 ms | 100 kHz
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example:
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//****main.c****//
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#include "lcd.h"
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int main(void){
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lcd_init(LCD_DISP_ON); // init lcd and turn on
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lcd_puts("Hello World"); // put string from RAM to display (TEXTMODE) or buffer (GRAPHICMODE)
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lcd_gotoxy(0,2); // set cursor to first column at line 3
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lcd_puts_p(PSTR("String from flash")); // puts string form flash to display (TEXTMODE) or buffer (GRAPHICMODE)
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#if defined GRAPHICMODE
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lcd_drawCircle(64,32,7,WHITE); // draw circle to buffer
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lcd_display(); // send buffer to display
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#endif
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for(;;){
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//main loop
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}
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return 0;
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}
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