Diff: MCP23017.cpp

Revision:

0:6dd30d790eff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MCP23017.cpp	Mon Jun 02 05:38:36 2014 +0000
@@ -0,0 +1,89 @@
+/* MCP23017 Library for mbed
+ * Copyright (c) 2014, Takuya Urakawa
+ * 
+ * This library is released under the MIT License
+ * See http://opensource.org/licenses/mit-license.php
+ */
+
+#include "MCP23017.h"
+
+namespace MCP23017 {
+
+MCP23017::MCP23017(I2C &_i2c, char _addr): 
+	mI2c(_i2c)
+{
+	mWriteAddr = _addr & 0xFE;
+	mReadAddr = _addr | 0x01;
+}
+
+void MCP23017::init(void){
+	
+	// init config
+	i2cSend(REG_IOCON, 0);
+
+	// port 0
+	i2cSend(REG_GPIO, 0, 0);
+
+	// port dirrection all input
+	i2cSend(REG_IODIR, 0, 0);
+
+	// interupt off
+	i2cSend(REG_GPINTEN, 0, 0);
+
+	// clear interrupt
+	read(MCP23017_PORTA);
+	read(MCP23017_PORTB);
+}
+
+void MCP23017::setConfig(char _value){
+	
+	i2cSend(REG_IOCON, _value);
+}
+
+void MCP23017::setDirrection(char _port, char _value){
+	
+	i2cSend(REG_IODIR + _port, _value);
+}
+
+void MCP23017::setPullUp(char _port, char _value){
+	
+	i2cSend(REG_GPPU + _port, _value);
+}
+
+void MCP23017::setInputPolarity(char _port, char _value){
+	
+	i2cSend(REG_IPOL + _port, _value);
+}
+
+
+void MCP23017::write(char _port, char _value){
+	
+	i2cSend(REG_GPIO + _port, _value);
+}
+
+char MCP23017::read(char _port){
+	
+	return i2cRead(REG_GPIO + _port);
+}
+
+//void MCP23017::setInterruptConfig(char _port, char _intcon, char _defval){
+//	
+//	i2cSend(REG_INTCON + _port, _intcon);
+//	i2cSend(REG_DEFVAL + _port, _defval);
+
+//}
+
+//void MCP23017::interrupt(char _port, char _value){
+
+//	i2cSend(REG_GPINTEN + _port, _value);
+//	//Read from GPIO to clear interrupt flag
+//	read(_port);
+//}
+
+//char MCP23017::readIntcap(char _port){
+
+//	return i2cRead(REG_INTCAP + _port);
+//}
+
+} // end of namespace
+