Diff: PCA9672.cpp

Revision:

0:27125e4cf941

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9672.cpp	Sat Sep 21 05:28:44 2013 +0000
@@ -0,0 +1,54 @@
+/* mbed PCA9672 I2C I/O Expander Library
+ * Copyright (c) 2013 viswesr
+ *
+ * MIT License
+ *
+ * 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 "PCA9672.h"
+
+PCA9672::PCA9672(PinName sda, PinName scl) : _i2c(sda, scl)
+{
+    // Software Reset
+    _i2c.start();
+    while(_i2c.write(0x00) !=1);
+    while(_i2c.write(0x06) !=1);
+    _i2c.stop();
+
+    /* Software reset is not required. But, gives an 
+       indication if the selected I2C bus frequency works */
+}
+
+void PCA9672::frequency(int hz)
+{
+    _i2c.frequency(hz);
+}
+
+void PCA9672::write(char value)
+{
+    _i2c.write(PCA9672_ADDR, &value, 1);
+}
+
+int PCA9672::read(void)
+{
+    _i2c.read(PCA9672_ADDR | 0x01);
+}
+
+PCA9672::~PCA9672()
+{
+
+}
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