first commit

2022-08-24 07:59:16 +02:00
commit adfe5792c4
259 changed files with 77719 additions and 0 deletions
@@ -0,0 +1,230 @@
+/*************************************************** 
+  This is a library for the MCP23017 i2c port expander
+
+  These displays use I2C to communicate, 2 pins are required to  
+  interface
+  Adafruit invests time and resources providing this open source code, 
+  please support Adafruit and open-source hardware by purchasing 
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.  
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#include <Wire.h>
+#include <avr/pgmspace.h>
+#include "Adafruit_MCP23017.h"
+
+#if ARDUINO >= 100
+ #include "Arduino.h"
+#else
+ #include "WProgram.h"
+#endif
+
+// minihelper
+static inline void wiresend(uint8_t x) {
+#if ARDUINO >= 100
+  Wire.write((uint8_t)x);
+#else
+  Wire.send(x);
+#endif
+}
+
+static inline uint8_t wirerecv(void) {
+#if ARDUINO >= 100
+  return Wire.read();
+#else
+  return Wire.receive();
+#endif
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+void Adafruit_MCP23017::begin(uint8_t addr) {
+  if (addr > 7) {
+    addr = 7;
+  }
+  i2caddr = addr;
+
+  Wire.begin();
+
+  
+  // set defaults!
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(MCP23017_IODIRA);
+  wiresend(0xFF);  // all inputs on port A
+  Wire.endTransmission();
+
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(MCP23017_IODIRB);
+  wiresend(0xFF);  // all inputs on port B
+  Wire.endTransmission();
+}
+
+
+void Adafruit_MCP23017::begin(void) {
+  begin(0);
+}
+
+void Adafruit_MCP23017::pinMode(uint8_t p, uint8_t d) {
+  uint8_t iodir;
+  uint8_t iodiraddr;
+
+  // only 16 bits!
+  if (p > 15)
+    return;
+
+  if (p < 8)
+    iodiraddr = MCP23017_IODIRA;
+  else {
+    iodiraddr = MCP23017_IODIRB;
+    p -= 8;
+  }
+
+  // read the current IODIR
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(iodiraddr);	
+  Wire.endTransmission();
+  
+  Wire.requestFrom(MCP23017_ADDRESS | i2caddr, 1);
+  iodir = wirerecv();
+
+  // set the pin and direction
+  if (d == INPUT) {
+    iodir |= 1 << p; 
+  } else {
+    iodir &= ~(1 << p);
+  }
+
+  // write the new IODIR
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(iodiraddr);
+  wiresend(iodir);	
+  Wire.endTransmission();
+}
+
+uint16_t Adafruit_MCP23017::readGPIOAB() {
+  uint16_t ba = 0;
+  uint8_t a;
+
+  // read the current GPIO output latches
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(MCP23017_GPIOA);	
+  Wire.endTransmission();
+  
+  Wire.requestFrom(MCP23017_ADDRESS | i2caddr, 2);
+  a = wirerecv();
+  ba = wirerecv();
+  ba <<= 8;
+  ba |= a;
+
+  return ba;
+}
+
+void Adafruit_MCP23017::writeGPIOAB(uint16_t ba) {
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(MCP23017_GPIOA);	
+  wiresend(ba & 0xFF);
+  wiresend(ba >> 8);
+  Wire.endTransmission();
+}
+
+void Adafruit_MCP23017::digitalWrite(uint8_t p, uint8_t d) {
+  uint8_t gpio;
+  uint8_t gpioaddr, olataddr;
+
+  // only 16 bits!
+  if (p > 15)
+    return;
+
+  if (p < 8) {
+    olataddr = MCP23017_OLATA;
+    gpioaddr = MCP23017_GPIOA;
+  } else {
+    olataddr = MCP23017_OLATB;
+    gpioaddr = MCP23017_GPIOB;
+    p -= 8;
+  }
+
+  // read the current GPIO output latches
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(olataddr);	
+  Wire.endTransmission();
+  
+  Wire.requestFrom(MCP23017_ADDRESS | i2caddr, 1);
+   gpio = wirerecv();
+
+  // set the pin and direction
+  if (d == HIGH) {
+    gpio |= 1 << p; 
+  } else {
+    gpio &= ~(1 << p);
+  }
+
+  // write the new GPIO
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(gpioaddr);
+  wiresend(gpio);	
+  Wire.endTransmission();
+}
+
+void Adafruit_MCP23017::pullUp(uint8_t p, uint8_t d) {
+  uint8_t gppu;
+  uint8_t gppuaddr;
+
+  // only 16 bits!
+  if (p > 15)
+    return;
+
+  if (p < 8)
+    gppuaddr = MCP23017_GPPUA;
+  else {
+    gppuaddr = MCP23017_GPPUB;
+    p -= 8;
+  }
+
+
+  // read the current pullup resistor set
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(gppuaddr);	
+  Wire.endTransmission();
+  
+  Wire.requestFrom(MCP23017_ADDRESS | i2caddr, 1);
+  gppu = wirerecv();
+
+  // set the pin and direction
+  if (d == HIGH) {
+    gppu |= 1 << p; 
+  } else {
+    gppu &= ~(1 << p);
+  }
+
+  // write the new GPIO
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(gppuaddr);
+  wiresend(gppu);	
+  Wire.endTransmission();
+}
+
+uint8_t Adafruit_MCP23017::digitalRead(uint8_t p) {
+  uint8_t gpioaddr;
+
+  // only 16 bits!
+  if (p > 15)
+    return 0;
+
+  if (p < 8)
+    gpioaddr = MCP23017_GPIOA;
+  else {
+    gpioaddr = MCP23017_GPIOB;
+    p -= 8;
+  }
+
+  // read the current GPIO
+  Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+  wiresend(gpioaddr);	
+  Wire.endTransmission();
+  
+  Wire.requestFrom(MCP23017_ADDRESS | i2caddr, 1);
+  return (wirerecv() >> p) & 0x1;
+}
@@ -0,0 +1,63 @@
+/*************************************************** 
+  This is a library for the MCP23017 i2c port expander
+
+  These displays use I2C to communicate, 2 pins are required to  
+  interface
+  Adafruit invests time and resources providing this open source code, 
+  please support Adafruit and open-source hardware by purchasing 
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.  
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#ifndef _Adafruit_MCP23017_H_
+#define _Adafruit_MCP23017_H_
+
+// Don't forget the Wire library
+class Adafruit_MCP23017 {
+public:
+  void begin(uint8_t addr);
+  void begin(void);
+
+  void pinMode(uint8_t p, uint8_t d);
+  void digitalWrite(uint8_t p, uint8_t d);
+  void pullUp(uint8_t p, uint8_t d);
+  uint8_t digitalRead(uint8_t p);
+
+  void writeGPIOAB(uint16_t);
+  uint16_t readGPIOAB();
+
+ private:
+  uint8_t i2caddr;
+};
+
+#define MCP23017_ADDRESS 0x20
+
+// registers
+#define MCP23017_IODIRA 0x00
+#define MCP23017_IPOLA 0x02
+#define MCP23017_GPINTENA 0x04
+#define MCP23017_DEFVALA 0x06
+#define MCP23017_INTCONA 0x08
+#define MCP23017_IOCONA 0x0A
+#define MCP23017_GPPUA 0x0C
+#define MCP23017_INTFA 0x0E
+#define MCP23017_INTCAPA 0x10
+#define MCP23017_GPIOA 0x12
+#define MCP23017_OLATA 0x14
+
+
+#define MCP23017_IODIRB 0x01
+#define MCP23017_IPOLB 0x03
+#define MCP23017_GPINTENB 0x05
+#define MCP23017_DEFVALB 0x07
+#define MCP23017_INTCONB 0x09
+#define MCP23017_IOCONB 0x0B
+#define MCP23017_GPPUB 0x0D
+#define MCP23017_INTFB 0x0F
+#define MCP23017_INTCAPB 0x11
+#define MCP23017_GPIOB 0x13
+#define MCP23017_OLATB 0x15
+
+#endif