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Diffstat (limited to 'software/main/PCF8575.h')
| -rw-r--r-- | software/main/PCF8575.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/software/main/PCF8575.h b/software/main/PCF8575.h new file mode 100644 index 0000000..660b2c6 --- /dev/null +++ b/software/main/PCF8575.h @@ -0,0 +1,208 @@ +/*
+ * PCF8575 GPIO Port Expand
+ * https://www.mischianti.org/2019/07/22/pcf8575-i2c-16-bit-digital-i-o-expander/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Renzo Mischianti www.mischianti.org All right reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef PCF8575_h
+#define PCF8575_h
+
+#include "Wire.h"
+
+#if ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+
+// Uncomment to enable printing out nice debug messages.
+// #define PCF8575_DEBUG
+
+// Uncomment for low memory usage this prevent use of complex DigitalInput structure and free 7byte of memory
+// #define PCF8575_LOW_MEMORY
+
+// Define where debug output will be printed.
+#define DEBUG_PRINTER Serial
+
+// Define to manage original pinout of pcf8575
+// like datasheet but not sequential
+//#define NOT_SEQUENTIAL_PINOUT
+
+// Setup debug printing macros.
+#ifdef PCF8575_DEBUG
+ #define DEBUG_PRINT(...) { DEBUG_PRINTER.print(__VA_ARGS__); }
+ #define DEBUG_PRINTLN(...) { DEBUG_PRINTER.println(__VA_ARGS__); }
+#else
+ #define DEBUG_PRINT(...) {}
+ #define DEBUG_PRINTLN(...) {}
+#endif
+
+#define READ_ELAPSED_TIME 10
+
+//#define P0 B00000001
+//#define P1 B00000010
+//#define P2 B00000100
+//#define P3 B00001000
+//#define P4 B00010000
+//#define P5 B00100000
+//#define P6 B01000000
+//#define P7 B10000000
+//
+#ifdef NOT_SEQUENTIAL_PINOUT
+ #define P00 0
+ #define P01 1
+ #define P02 2
+ #define P03 3
+ #define P04 4
+ #define P05 5
+ #define P06 6
+ #define P07 7
+ #define P10 8
+ #define P11 9
+ #define P12 10
+ #define P13 11
+ #define P14 12
+ #define P15 13
+ #define P16 14
+ #define P17 15
+#else
+ #define P0 0
+ #define P1 1
+ #define P2 2
+ #define P3 3
+ #define P4 4
+ #define P5 5
+ #define P6 6
+ #define P7 7
+ #define P8 8
+ #define P9 9
+ #define P10 10
+ #define P11 11
+ #define P12 12
+ #define P13 13
+ #define P14 14
+ #define P15 15
+#endif
+
+#include <math.h>
+
+
+class PCF8575 {
+public:
+
+ PCF8575(uint8_t address);
+ PCF8575(uint8_t address, uint8_t interruptPin, void (*interruptFunction)() );
+
+#if !defined(__AVR) && !defined(__STM32F1__)
+ PCF8575(uint8_t address, uint8_t sda, uint8_t scl);
+ PCF8575(uint8_t address, uint8_t sda, uint8_t scl, uint8_t interruptPin, void (*interruptFunction)());
+#endif
+
+#ifdef ESP32
+ ///// changes for second i2c bus
+ PCF8575(TwoWire *pWire, uint8_t address);
+ PCF8575(TwoWire *pWire, uint8_t address, uint8_t sda, uint8_t scl);
+
+ PCF8575(TwoWire *pWire, uint8_t address, uint8_t interruptPin, void (*interruptFunction)() );
+ PCF8575(TwoWire *pWire, uint8_t address, uint8_t sda, uint8_t scl, uint8_t interruptPin, void (*interruptFunction)());
+#endif
+
+ void begin();
+ void pinMode(uint8_t pin, uint8_t mode);
+
+ void readBuffer(bool force = true);
+ uint8_t digitalRead(uint8_t pin);
+ #ifndef PCF8575_LOW_MEMORY
+ struct DigitalInput {
+#ifdef NOT_SEQUENTIAL_PINOUT
+ uint8_t p00;
+ uint8_t p01;
+ uint8_t p02;
+ uint8_t p03;
+ uint8_t p04;
+ uint8_t p05;
+ uint8_t p06;
+ uint8_t p07;
+ uint8_t p10;
+ uint8_t p11;
+ uint8_t p12;
+ uint8_t p13;
+ uint8_t p14;
+ uint8_t p15;
+ uint8_t p16;
+ uint8_t p17;
+#else
+ uint8_t p0;
+ uint8_t p1;
+ uint8_t p2;
+ uint8_t p3;
+ uint8_t p4;
+ uint8_t p5;
+ uint8_t p6;
+ uint8_t p7;
+ uint8_t p8;
+ uint8_t p9;
+ uint8_t p10;
+ uint8_t p11;
+ uint8_t p12;
+ uint8_t p13;
+ uint8_t p14;
+ uint8_t p15;
+#endif
+ } digitalInput;
+
+
+ DigitalInput digitalReadAll(void);
+ #else
+ uint16_t digitalReadAll(void);
+ #endif
+ void digitalWrite(uint8_t pin, uint8_t value);
+
+private:
+ uint8_t _address;
+
+ #if defined(__AVR) || defined(__STM32F1__)
+ uint8_t _sda;
+ uint8_t _scl;
+ #else
+ uint8_t _sda = SDA;
+ uint8_t _scl = SCL;
+ #endif
+
+ TwoWire *_wire;
+
+ bool _usingInterrupt = false;
+ uint8_t _interruptPin = 2;
+ void (*_interruptFunction)(){};
+
+ uint16_t writeMode = 0;
+ uint16_t readMode = 0;
+ uint16_t byteBuffered = 0;
+ unsigned long lastReadMillis = 0;
+
+ uint16_t writeByteBuffered = 0;
+
+};
+
+#endif
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