Diff: PCF8574.cpp

Revision:

0:ab4e14b911ee

Child:

1:ec8da0c59403

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8574.cpp	Thu Jun 03 12:56:21 2010 +0000
@@ -0,0 +1,41 @@
+/* mbed PCF8574 Library, for driving the I2C I/O Expander
+ * Copyright (c) 2008-2010, cstyles, sford
+ *
+ * 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 "PCF8574.h"
+#include "mbed.h"
+
+PCF8574::PCF8574(PinName sda, PinName scl, int address)
+        : _i2c(sda, scl) {
+    _address = address;
+}
+
+int PCF8574::read() {
+    char foo[1];
+    _i2c.read(_addr, foo, 1);
+    return foo[0];
+}
+
+void PCF8574::write(int data) {
+    char foo[1];
+    foo[0] = data;
+    _i2c.write(_addr, foo, 1);
+}