update readme.md

libraries/MATRIX7219/CHANGELOG.md

@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.1.2] - 2023-11-09
+- update readme.md
+- add derived class MAX7221 (identical for now).
+- minor edits
+
+
 ## [0.1.1] - 2023-07-29
 - update AVR performance (from FastShiftOut)
 - add **writeZero()** (generic improvement)
@@ -15,10 +21,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - update readme.md
 - update keywords.txt
 
-
 ## [0.1.0] - 2023-07-28
 - initial version
 
+----
+
 ## [0.0.1] - eons ago
 - first tests
 

libraries/MATRIX7219/MATRIX7219.cpp

@@ -1,7 +1,7 @@
 //
 //    FILE: MATRIX7219.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
+// VERSION: 0.1.2
 //    DATE: 2023-07-28
 // PURPOSE: Arduino Library for 8x8 LED MATRIX MAX7219
 //     URL: https://github.com/RobTillaart/MATRIX7219
@@ -214,7 +214,7 @@ bool MATRIX7219::getSwap()
 
 ///////////////////////////////////////////////////////
 //
-//  PRIVATE
+//  PROTECTED
 //
 void MATRIX7219::_write(uint8_t b)
 {
@@ -296,5 +296,16 @@ uint8_t MATRIX7219::_reverse8(uint8_t in)
   return x;
 }
 
+
+///////////////////////////////////////////////////////////////
+//
+//  DERIVED MATRIX7221 CLASS
+//
+MATRIX7221::MATRIX7221(uint8_t dataPin, uint8_t selectPin, uint8_t clockPin, uint8_t matrices)
+          : MATRIX7219(dataPin, selectPin, clockPin, matrices)
+          {
+          }
+
+
 //  -- END OF FILE --
 

libraries/MATRIX7219/MATRIX7219.h

@@ -2,7 +2,7 @@
 //
 //    FILE: MATRIX7219.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
+// VERSION: 0.1.2
 //    DATE: 2023-07-28
 // PURPOSE: Arduino Library for 8x8 LED MATRIX MAX7219
 //     URL: https://github.com/RobTillaart/MATRIX7219
@@ -11,7 +11,7 @@
 #include "Arduino.h"
 
 
-#define MATRIX7219_LIB_VERSION        (F("0.1.1"))
+#define MATRIX7219_LIB_VERSION        (F("0.1.2"))
 
 
 class MATRIX7219
@@ -40,7 +40,7 @@ public:
   void     setSwap(bool swap);
   bool     getSwap();
 
-private:
+protected:
 
   void     _write(uint8_t b);
   void     _writeZero();         //  optimized  writing of all 0
@@ -69,5 +69,16 @@ private:
 
 
 
+///////////////////////////////////////////////////////////////
+//
+//  DERIVED MATRIX7221 CLASS
+//
+class MATRIX7221 : public MATRIX7219
+{
+public:
+  MATRIX7221(uint8_t dataPin, uint8_t selectPin, uint8_t clockPin, uint8_t matrices = 1);
+};
+
+
 //  -- END OF FILE --
 

libraries/MATRIX7219/README.md

@@ -2,13 +2,16 @@
 [![Arduino CI](https://github.com/RobTillaart/MATRIX7219/workflows/Arduino%20CI/badge.svg)](https://github.com/marketplace/actions/arduino_ci)
 [![Arduino-lint](https://github.com/RobTillaart/MATRIX7219/actions/workflows/arduino-lint.yml/badge.svg)](https://github.com/RobTillaart/MATRIX7219/actions/workflows/arduino-lint.yml)
 [![JSON check](https://github.com/RobTillaart/MATRIX7219/actions/workflows/jsoncheck.yml/badge.svg)](https://github.com/RobTillaart/MATRIX7219/actions/workflows/jsoncheck.yml)
+[![GitHub issues](https://img.shields.io/github/issues/RobTillaart/MATRIX7219.svg)](https://github.com/RobTillaart/MATRIX7219/issues)
+
 [![License: MIT](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/RobTillaart/MATRIX7219/blob/master/LICENSE)
 [![GitHub release](https://img.shields.io/github/release/RobTillaart/MATRIX7219.svg?maxAge=3600)](https://github.com/RobTillaart/MATRIX7219/releases)
+[![PlatformIO Registry](https://badges.registry.platformio.org/packages/robtillaart/library/MATRIX7219.svg)](https://registry.platformio.org/libraries/robtillaart/MATRIX7219)
 
 
 # MATRIX7219
 
-Arduino Library for controlling one or more 8x8 LED MATRIX with a MAX7219.
+Arduino Library for controlling one or more 8x8 LED MATRIX with a MAX7219 / MAX7221.
 
 
 ## Description
@@ -21,6 +24,8 @@ For the future two (derived) classes are planned:
 - a class that is optimized to use for a single 8x8 matrix.
 - a class that buffers the state of the LEDS, allowing more functionality.
 
+MAX7221 derived class is identical (for now).
+
 
 #### Tests
 
@@ -32,7 +37,7 @@ implementation of the **inverse, reverse** and **swap** functions.
 
 #### Related
 
-- TODO
+- https://embed.plnkr.co/3VUsekP3jC5xwSIQDVHx Sprite Generator by Miro Božík
 
 
 #### Tested
@@ -42,12 +47,16 @@ Tested on Arduino UNO.
 
 ## Interface
 
-**\#include "MATRIX7219.h"**
+```cpp
+#include "MATRIX7219.h"
+```
 
 Not all functionality works, matrix parameter et al.
 
 - **MATRIX7219(uint8_t dataPin, uint8_t selectPin, uint8_t clockPin, uint8_t matrices)** 
 Constructor, initializes IO pins and the number of 8x8 matrices on same pins.
+- **MATRIX7221(uint8_t dataPin, uint8_t selectPin, uint8_t clockPin, uint8_t matrices)** 
+Constructor (derived class) idem as above.
 - **void begin()** resets the internals of the connected device.
 - **uint8_t  getMatrixCount()** returns number of matrices set in constructor.
 Convenience function.
@@ -151,3 +160,12 @@ First test ESP32
   - **uint8_t getBrightness()**
   - not needed yet
 
+
+## Support
+
+If you appreciate my libraries, you can support the development and maintenance.
+Improve the quality of the libraries by providing issues and Pull Requests, or
+donate through PayPal or GitHub sponsors.
+
+Thank you,
+

libraries/MATRIX7219/keywords.txt

@@ -2,6 +2,7 @@
 
 # Data types (KEYWORD1)
 MATRIX7219	KEYWORD1
+MATRIX7221	KEYWORD1
 
 
 # Methods and Functions (KEYWORD2)

libraries/MATRIX7219/library.json

@@ -1,7 +1,7 @@
 {
   "name": "MATRIX7219",
   "keywords": "MATRIX, 8x8, LED, 7219, 7221",
-  "description": "Arduino Library for 8x8 LED MATRIX MAX7219.",
+  "description": "Arduino Library for 8x8 LED MATRIX MAX7219, MAX7221.",
   "authors":
   [
     {
@@ -15,9 +15,9 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/MATRIX7219.git"
   },
-  "version": "0.1.1",
+  "version": "0.1.2",
   "license": "MIT",
-  "frameworks": "arduino",
+  "frameworks": "*",
   "platforms": "*",
   "headers": "MATRIX7219.h"
 }

libraries/MATRIX7219/library.properties

@@ -1,8 +1,8 @@
 name=MATRIX7219
-version=0.1.1
+version=0.1.2
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
-sentence=Arduino Library for 8x8 LED MATRIX MAX7219.
+sentence=Arduino Library for 8x8 LED MATRIX MAX7219, MAX7221.
 paragraph=
 category=Display
 url=https://github.com/RobTillaart/MATRIX7219