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Version v3.0.0

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matiasus 2022-12-15 21:50:49 +01:00
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39
README.md
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@ -6,29 +6,28 @@ Detailed information are described in [Datasheet SSD1306](https://cdn-shop.adafr
## Library
C library is aimed for driving [0.96" OLED display with SSD1306 driver](#demonstration) 128x64 or 128x32 version through TWI's (I2C). Settings for particular versions:
- 128x64 version
- command argument **SSD1306_SET_MUX_RATIO** set to *63* (ssd1306.c)
- command argument **SSD1306_SET_MUX_RATIO** set to *0x3F* (ssd1306.c)
- command argument **SSD1306_COM_PIN_CONF** set to *0x12* (ssd1306.c)
- **END_PAGE_ADDR** set to 7 (ssd1306.h)
- 128x32 version
- command argument **SSD1306_SET_MUX_RATIO** set to *31* (ssd1306.c)
- command argument **SSD1306_SET_MUX_RATIO** set to *0x1F* (ssd1306.c)
- command argument **SSD1306_COM_PIN_CONF** set to *0x02* (ssd1306.c)
- **END_PAGE_ADDR** set to 3 (ssd1306.h)
### Versions
- 1.0 - basic functions. The first publication.
- 2.0 - more changes:
- rebuild to cacheMemLcd array. It means that every request is stored in cache array and then is depicted on the display by function [SSD1306_UpdateScreen (uint8_t)](#ssd1306_updatescreen).
- Added new function -> [SSD1306_DrawLine (uint8_t, uint8_t, uint8_t, uint8_t)](#ssd1306_drawline). Possible depicted any line (horizontal, vertical, with slope).
- Possible to use for more than 1 display (not tested, cause displays that I have avialable had the same addresses).
- 1.0.0 - basic functions. The first publication.
- [2.0.0](https://github.com/Matiasus/SSD1306/tree/v2.0.0) - more changes:
- rebuild to 'cacheMemLcd' array approach. It means that every request is stored in 'cacheMemLcd' array (RAM) and by the [SSD1306_UpdateScreen (uint8_t)](#ssd1306_updatescreen) function is printed on the display.
- added new function -> [SSD1306_DrawLine (uint8_t, uint8_t, uint8_t, uint8_t)](#ssd1306_drawline). Possible depicted any line (horizontal, vertical, with slope).
- possible to use for more than 1 display (not tested).
- **!!!** ~1kB RAM memory consumption.
- 3.0 - simplified alphanumeric version
- used for displaying alphanumeric characters
- **one display** applicable
- [3.0.0](https://github.com/Matiasus/SSD1306/tree/v3.0.0) - simplified alphanumeric version
- displaying alphanumeric characters
- for **one display** applicable
- **only few RAM bytes** consumption
- **!!!** no graphic functions
- **!!!** no graphic functions like drawLine
## Dependencies
- [font.c](https://github.com/Matiasus/SSD1306/blob/readme-edits/lib/font.c)
- [font.h](https://github.com/Matiasus/SSD1306/blob/readme-edits/lib/font.h)
- [twi.c](https://github.com/Matiasus/SSD1306/blob/readme-edits/lib/twi.c)
- [twi.h](https://github.com/Matiasus/SSD1306/blob/readme-edits/lib/twi.h)
@ -125,17 +124,13 @@ Init sequence OLED display was defined according to page 64 (next to last page)
// | 0xAF |
// +---------------------------+
```
## Functions
- [SSD1306_Init (void)](#ssd1306_init) - Init display
- [SSD1306_ClearScreen (void)](#ssd1306_clearscreen) - Clear screen
- [SSD1306_NormalScreen (void)](#ssd1306_normalscreen) - Normal screen
- [SSD1306_InverseScreen (void)](#ssd1306_inversescreen) - Inverse screen
- [SSD1306_SetWindow (uint8_t, uint8_t, uint8_t, uint8_t)](#ssd1306_setwindow) - Set window
- [SSD1306_SetPosition (uint8_t, uint8_t)](#ssd1306_setposition) - Set position
- [SSD1306_DrawChar (char, enum E_Font)](#ssd1306_drawchar) - Draw specific character (bold | underline | normal)
- [SSD1306_DrawString (char*, enum E_Font)](#ssd1306_drawstring) - Draw specific string (bold | underline | normal)
## Demonstration version v1.0.0
<img src="img/ssd1306_v100.jpg" />
## Demonstration
## Demonstration version v2.0.0
<img src="img/ssd1306_v200.jpg" />
## Demonstration version v3.0.0
<img src="img/ssd1306_v300.jpg" />
## Acknowledgement

0
img/demonstration_ssd1306.jpg → img/ssd1306_v100.jpg
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12
lib/ssd1306.c
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@ -7,16 +7,16 @@
*
* @author Marian Hrinko
* @date 06.10.2020
* @update 06.12.2022
* @update 15.12.2022
* @file ssd1306.c
* @version 3.0
* @version 3.0.0
* @tested AVR Atmega328p
*
* @depend font.h, twi.h
* @depend ssd1306.h
* --------------------------------------------------------------------------------------+
* @descr Version 1.0 -> applicable for 1 display
* Version 2.0 -> rebuild to 'cacheMemLcd' array
* Version 3.0 -> simplified alphanumeric version
* @descr Version 1.0.0 -> applicable for 1 display
* Version 2.0.0 -> rebuild to 'cacheMemLcd' array
* Version 3.0.0 -> simplified alphanumeric version for 1 display
* --------------------------------------------------------------------------------------+
* @usage Basic Setup for OLED Display
*/

10
lib/ssd1306.h
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@ -7,16 +7,16 @@
*
* @author Marian Hrinko
* @date 06.10.2020
* @update 21.11.2022
* @update 15.12.2022
* @file ssd1306.h
* @version 3.0
* @version 3.0.0
* @tested AVR Atmega328p
*
* @depend font.h, twi.h
* -------------------------------------------------------------------------------------+
* @descr Version 1.0 -> applicable for 1 display
* Version 2.0 -> rebuild to 'cacheMemLcd' array
* Version 3.0 -> simplified alphanumeric version
* @descr Version 1.0.0 -> applicable for 1 display
* Version 2.0.0 -> rebuild to 'cacheMemLcd' array
* Version 3.0.0 -> simplified alphanumeric version for 1 display
* -------------------------------------------------------------------------------------+
* @usage Basic Setup for OLED Display
*/

25
lib/twi.c
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@ -1,7 +1,7 @@
/**
* ---------------------------------------------------------------+
* --------------------------------------------------------------------------------------+
* @desc Two Wire Interface / I2C Communication
* ---------------------------------------------------------------+
* --------------------------------------------------------------------------------------+
* Copyright (C) 2020 Marian Hrinko.
* Written by Marian Hrinko (mato.hrinko@gmail.com)
*
@ -10,13 +10,12 @@
* @file twi.c
* @tested AVR Atmega16, ATmega8, Atmega328
*
* @depend
* ---------------------------------------------------------------+
* @depend twi.h
* --------------------------------------------------------------------------------------+
* @usage Master Transmit Operation
*/
// include libraries
#include <avr/io.h>
#include "twi.h"
/**
@ -28,16 +27,16 @@
*/
void TWI_Init (void)
{
// +++++++++++++++++++++++++++++++++++++++++++++
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Calculation fclk:
//
// fclk = (fcpu)/(16+2*TWBR*4^Prescaler) m16
// fclk = (fcpu)/(16+2*TWBR*Prescaler) m328p
// ---------------------------------------------
// -------------------------------------------------------------------------------------
// Calculation TWBR:
//
// TWBR = {(fcpu/fclk) - 16 } / (2*4^Prescaler)
// +++++++++++++++++++++++++++++++++++++++++++++
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// @param1 value of TWBR (m16)
// fclk = 400kHz; TWBR = 3
// fclk = 100kHz; TWBR = 20
@ -59,7 +58,7 @@ char TWI_MT_Start (void)
// null status flag
TWI_TWSR &= ~0xA8;
// START
// ----------------------------------------------
// -------------------------------------------------------------------------------------
// request for bus
TWI_START();
// wait till flag set
@ -83,7 +82,7 @@ char TWI_MT_Start (void)
char TWI_MT_Send_SLAW (char address)
{
// SLA+W
// ----------------------------------------------
// -------------------------------------------------------------------------------------
TWI_TWDR = (address << 1);
// enable
TWI_ENABLE();
@ -109,7 +108,7 @@ char TWI_MT_Send_SLAW (char address)
char TWI_MT_Send_Data (char data)
{
// DATA
// ----------------------------------------------
// -------------------------------------------------------------------------------------
TWI_TWDR = data;
// enable
TWI_ENABLE();
@ -135,7 +134,7 @@ char TWI_MT_Send_Data (char data)
char TWI_MR_Send_SLAR (char address)
{
// SLA+R
// ----------------------------------------------
// -------------------------------------------------------------------------------------
TWI_TWDR = (address << 1) | 0x01;
// enable
TWI_ENABLE();
@ -161,7 +160,7 @@ char TWI_MR_Send_SLAR (char address)
void TWI_Stop (void)
{
// End TWI
// -------------------------------------------------
// -------------------------------------------------------------------------------------
// send stop sequence
TWI_STOP ();
// wait for TWINT flag is set

33
lib/twi.h
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@ -1,7 +1,7 @@
/**
* ---------------------------------------------------------------+
* --------------------------------------------------------------------------------------+
* @desc Two Wire Interface / I2C Communication
* ---------------------------------------------------------------+
* --------------------------------------------------------------------------------------+
* Copyright (C) 2020 Marian Hrinko.
* Written by Marian Hrinko (mato.hrinko@gmail.com)
*
@ -10,16 +10,19 @@
* @file twi.h
* @tested AVR Atmega16, ATmega8, Atmega328
*
* @depend
* ---------------------------------------------------------------+
* @depend avr/io.h
* --------------------------------------------------------------------------------------+
* @usage Basic Master Transmit Operation
*/
#ifndef __TWI_H__
#define __TWI_H__
// @includes
#include <avr/io.h>
// define register for TWI communication
// -------------------------------------------
// -------------------------------------------------------------------------------------
#if defined(__AVR_ATmega16__) || defined(__AVR_ATmega8__) || defined(__AVR_ATmega328P__)
#define TWI_TWAR TWAR // TWI (Slave) Address Register
@ -31,22 +34,22 @@
#endif
// Success
// -------------------------------------------
// -------------------------------------------------------------------------------------
#ifndef SUCCESS
#define SUCCESS 0
#endif
// Error
// -------------------------------------------
// -------------------------------------------------------------------------------------
#ifndef ERROR
#define ERROR 1
#endif
// ++++++++++++++++++++++++++++++++++++++++++
// -------------------------------------------------------------------------------------
//
// M A S T E R M O D E
//
// ++++++++++++++++++++++++++++++++++++++++++
// -------------------------------------------------------------------------------------
// Master Mode - Transmitter / Receiver
#define TWI_START_ACK 0x08 // A START condition has been transmitted
#define TWI_REP_START_ACK 0x10 // A repeated START condition has been transmitted
@ -62,11 +65,11 @@
#define TWI_MR_DATA_ACK 0x50 // Data byte has been received; ACK has been received
#define TWI_MR_DATA_NACK 0x58 // Data byte has been received; NOT ACK has been received
// ++++++++++++++++++++++++++++++++++++++++++
// -------------------------------------------------------------------------------------
//
// S L A V E M O D E
//
// ++++++++++++++++++++++++++++++++++++++++++
// -------------------------------------------------------------------------------------
// Slave Receiver Mode
#define TWI_SR_SLAW_ACK 0x60 // Own Slave address has been received; ACK returned
#define TWI_SR_ALMOA_ACK 0x68 // Arbitration Lost in SLA+R/W as Master; Own Slave address has been received; ACK returned
@ -85,7 +88,7 @@
#define TWI_ST_DATA_LOST_ACK 0xC8 // Last data byte in TWDR has been transmitted (TWEA = '0'); ACK has been received
// TWI CLK frequency
// -------------------------------------------
// -------------------------------------------------------------------------------------
// @param TWBR
// @param Prescaler
// TWPS1 TWPS0 - PRESCALER
@ -96,21 +99,21 @@
#define TWI_FREQ(BIT_RATE, PRESCALER) { TWI_TWBR = BIT_RATE; TWI_TWSR |= (TWI_TWSR & 0x03) | PRESCALER; }
// TWI start condition
// -------------------------------------------
// -------------------------------------------------------------------------------------
// (1 << TWEN) - TWI Enable
// (1 << TWINT) - TWI Interrupt Flag - must be cleared by set
// (1 << TWSTA) - TWI Start
#define TWI_START() { TWI_TWCR = (1 << TWEN) | (1 << TWINT) | (1 << TWSTA); }
// TWI stop condition
// -------------------------------------------
// -------------------------------------------------------------------------------------
// (1 << TWEN) - TWI Enable
// (1 << TWINT) - TWI Interrupt Flag - must be cleared by set
// (1 << TWSTO) - TWI Stop
#define TWI_STOP() { TWI_TWCR = (1 << TWEN) | (1 << TWINT) | (1 << TWSTO); }
// TWI enable
// -------------------------------------------
// -------------------------------------------------------------------------------------
// (1 << TWEN) - TWI Enable
// (1 << TWINT) - TWI Interrupt Flag - must be cleared by set
#define TWI_ENABLE() { TWI_TWCR = (1 << TWEN) | (1 << TWINT); }

8
main.c
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@ -9,14 +9,14 @@
* @date 06.10.2020
* @update 19.07.2021
* @file main.c
* @version 3.0
* @version 3.0.0
* @tested AVR Atmega328p
*
* @depend lib/ssd1306.h
* --------------------------------------------------------------------------------------+
* @descr Version 1.0 -> applicable for 1 display
* Version 2.0 -> rebuild to 'cacheMemLcd' array
* Version 3.0 -> simplified alphanumeric version
* @descr Version 1.0.0 -> applicable for 1 display
* Version 2.0.0 -> rebuild to 'cacheMemLcd' array
* Version 3.0.0 -> simplified alphanumeric version for 1 display
* --------------------------------------------------------------------------------------+
*/