commit 81e507f29501dbef6e3e642d1dc6a9c16046ad40
Author: Alexander Klein <alex@kleiax.de>
Date:   Thu Feb 9 11:17:03 2023 +0100

    Initial commit

diff --git a/include/shiftregister.h b/include/shiftregister.h
new file mode 100644
index 0000000..74dd5ef
--- /dev/null
+++ b/include/shiftregister.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <Arduino.h>
+
+class ShiftRegister {
+    public:
+        ShiftRegister(uint8_t latch, uint8_t clock, uint8_t data, uint8_t numberOfRegister = 1);
+        ~ShiftRegister();
+
+        bool writePin(uint8_t pin, uint8_t state);
+        bool writeByte(uint8_t registerNumber, byte data);
+
+    private:
+        void write();
+
+        uint8_t latchPin;
+        uint8_t clockPin;
+        uint8_t dataPin;
+        uint8_t numberOfRegister;
+        uint8_t numberOfPins;
+
+        byte* data;
+
+};
\ No newline at end of file
diff --git a/library.json b/library.json
new file mode 100644
index 0000000..860e7ac
--- /dev/null
+++ b/library.json
@@ -0,0 +1,23 @@
+{
+    "name": "Shiftregister",
+    "version": "1.0.0",
+    "description": "Control shift register with simple Class.",
+    "keywords": "shift, register, multiple",
+    "repository":
+    {
+      "type": "git",
+      "url": "https://git.kleiax.de/PlatformIO-Libs/Shiftregister.git"
+    },
+    "authors":
+    [
+      {
+        "name": "Alexander Klein",
+        "email": "alex@kleiax.de",
+        "url": "https://www.kleiax.de/contact"
+      }
+    ],
+    "license": "MIT",
+    "homepage": "https://www.kleiax.de/",
+    "frameworks": "*",
+    "platforms": "*"
+  }
\ No newline at end of file
diff --git a/src/shiftregister.cpp b/src/shiftregister.cpp
new file mode 100644
index 0000000..ac50626
--- /dev/null
+++ b/src/shiftregister.cpp
@@ -0,0 +1,64 @@
+#include "shiftregister.h"
+
+ShiftRegister::ShiftRegister(uint8_t latch, uint8_t clock, uint8_t data, uint8_t numberOfRegister) {
+    this->latchPin = latch;
+    this->clockPin = clock;
+    this->dataPin = data;
+    this->numberOfPins = numberOfRegister * 8;
+
+    pinMode(this->latchPin, OUTPUT);
+    pinMode(this->clockPin, OUTPUT);
+    pinMode(this->dataPin, OUTPUT);
+
+    digitalWrite(this->latchPin, LOW);
+    digitalWrite(this->clockPin, LOW);
+    digitalWrite(this->dataPin, LOW);
+
+    this->data = new byte[numberOfRegister];
+
+    for (uint8_t i = 0; i < numberOfRegister; i++)
+        this->data[i] = 0; 
+
+    this->numberOfRegister = numberOfRegister;
+    this->numberOfPins = this->numberOfRegister * 8;
+
+    this->write();
+}
+
+ShiftRegister::~ShiftRegister() {
+    delete[] data;
+}
+
+bool ShiftRegister::writePin(uint8_t pin, uint8_t state) {
+    if (!(pin < this->numberOfPins))
+        return false;
+
+    uint8_t registerNumber = pin / 8;
+    if (registerNumber)
+        pin -= 8;
+
+    if (state)
+        this->data[registerNumber] |= (1 << pin);
+    else
+        this->data[registerNumber] &= ~(1 << pin);
+
+    this->write();
+    return true;
+}
+
+bool ShiftRegister::writeByte(uint8_t registerNumber, byte data) {
+    if (registerNumber < this->numberOfRegister) {
+        this->data[registerNumber] = data;
+        this->write();
+        return true;
+    }
+    return false;
+}
+
+void ShiftRegister::write() {
+    for (int8_t i = this->numberOfRegister - 1; i >= 0; i--)
+        shiftOut(this->dataPin, this->clockPin, MSBFIRST, this->data[i]);
+    
+    digitalWrite(this->latchPin, HIGH);
+    digitalWrite(this->latchPin, LOW);
+}
\ No newline at end of file