Diff: PCF8575.cpp

Revision:

0:37337b5a13c0

Child:

5:e5bb35ac2c61

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8575.cpp	Wed Aug 25 11:54:34 2010 +0000
@@ -0,0 +1,42 @@
+/* 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 "PCF8575.h"
+#include "mbed.h"
+
+PCF8575::PCF8575(PinName sda, PinName scl, int address)
+        : _i2c(sda, scl) {
+    _address = address;
+}
+
+int PCF8575::read() {
+    char foo[2];
+    _i2c.read(_address, foo, 2);
+    return (foo[0] << 8) | foo[1];
+}
+
+void PCF8575::write(int data) {
+    char foo[2];
+    foo[0]=data;
+    foo[1]=data>>8;
+    _i2c.write(_address, foo, 2);
+}