Diff: PCF8575.h

Revision:

0:37337b5a13c0

Child:

3:e45eb11841df

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8575.h	Wed Aug 25 11:54:34 2010 +0000
@@ -0,0 +1,56 @@
+/* mbed PCF8574 Library, for driving the I2C I/O Expander
+ * Copyright (c) 2008-2010, cstyles, sford (Originally PCF8574 lib)
+ *                          new created by Lerche
+ * 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.
+ */
+
+#include "mbed.h"
+
+#ifndef MBED_PCF8575_H
+#define MBED_PCF8575_H
+
+/** Interface to the popular PCF8574 I2C 8 Bit IO expander */
+class PCF8575 {
+public:
+    /** Create an instance of the PCF8574 connected to specfied I2C pins, with the specified address.
+     *
+     * @param sda The I2C data pin
+     * @param scl The I2C clock pin
+     * @param address The I2C address for this PCF8575
+     */
+    PCF8575(PinName sda, PinName scl, int address);
+
+    /** Read the IO pin level
+     *
+     * @return The byte read
+     */
+    int read();
+    
+    /** Write to the IO pins
+     * 
+     * @param data The 8 bits to write to the IO port
+     */
+    void write(int data);
+
+private:
+    I2C _i2c;
+    int _address;
+};
+
+#endif