Revision 0:37337b5a13c0, committed 2010-08-25

Comitter:

Lerche

Date:

Wed Aug 25 11:54:34 2010 +0000

Child:

1:0e6f25d17fa8

Commit message:

Changed in this revision

--- /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);
+}

--- /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

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Aug 25 11:54:34 2010 +0000
@@ -0,0 +1,11 @@
+#include "mbed.h"
+#include "PCF8575.h"
+
+PCF8575 PCF(p9, p10, 0x40);
+int kvar;
+
+
+int main() {
+        PCF.write(0xFFFF);
+        kvar = PCF.read();
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Aug 25 11:54:34 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9114680c05da