Diff: Adafruit_MCP23017.h

Revision:

0:4f1c764a42d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Adafruit_MCP23017.h	Mon Nov 19 09:44:37 2018 +0000
@@ -0,0 +1,71 @@
+/***************************************************
+  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_
+
+#include "mbed.h"
+
+class Adafruit_MCP23017
+{
+public:
+    Adafruit_MCP23017(I2C *master);
+    ~Adafruit_MCP23017(){};
+
+    void pinMode(uint8_t p, bool input_mode);
+    void digitalWrite(uint8_t p, bool high);
+    void pullUp(uint8_t p, bool pullup_anable);
+    uint8_t digitalRead(uint8_t p);
+
+    void writeGPIOAB(uint16_t);
+    uint16_t readGPIOAB();
+
+private:
+    I2C *_master;
+    char *_buffer;
+};
+
+//#define MCP23017_ADDRESS 0x20
+#define MCP23017_ADDRESS 0x40
+
+#define INPUT 1
+#define OUTPUT 0
+
+// 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
+