Revision 0:e17d7079ee96, committed 2014-10-04

Comitter:

yasuyuki

Date:

Sat Oct 04 12:03:47 2014 +0000

Commit message:

first release

Changed in this revision

diff -r 000000000000 -r e17d7079ee96 PCF8591.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8591.cpp	Sat Oct 04 12:03:47 2014 +0000
@@ -0,0 +1,36 @@
+//**********************
+// PCF8591.cpp for mbed
+//
+// PCF8591 lcd(P0_5,P0_4);
+// or
+// I2C i2c(P0_5,P0_4);
+// PCF8591 lcd(i2c);
+//
+// (C)Copyright 2014 All rights reserved by Y.Onodera
+// http://einstlab.web.fc2.com
+//**********************
+
+#include "mbed.h"
+#include "PCF8591.h"
+
+PCF8591::PCF8591 (PinName sda, PinName scl) : _i2c(sda, scl) {
+}
+PCF8591::PCF8591 (I2C& p_i2c) : _i2c(p_i2c) {
+}
+
+void PCF8591::put(unsigned char a, unsigned char b)
+{
+    buf[0]=a;
+    buf[1]=b;
+    _i2c.write(PCF8591_ADDR, buf, 2);
+}
+
+unsigned char PCF8591::get(unsigned char a)
+{
+    buf[0] = a;
+    _i2c.write(PCF8591_ADDR, buf, 1, true); // no stop, repeated
+    _i2c.read( PCF8591_ADDR, buf, 1);
+    return buf[0];
+}
+
+

diff -r 000000000000 -r e17d7079ee96 PCF8591.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8591.h	Sat Oct 04 12:03:47 2014 +0000
@@ -0,0 +1,31 @@
+//**********************
+// PCF8591.h for mbed
+//
+// (C)Copyright 2014 All rights reserved by Y.Onodera
+// http://einstlab.web.fc2.com
+//**********************
+
+#ifndef PCF8591_H_
+#define PCF8591_H_
+
+#define PCF8591_ADDR    0x92
+
+#include "mbed.h"
+
+class PCF8591{
+public:
+    PCF8591 (PinName sda, PinName scl);
+    PCF8591 (I2C& p_i2c);
+
+    void put(unsigned char a, unsigned char b);
+    unsigned char get(unsigned char a);
+
+protected:
+    
+    I2C _i2c;
+    char buf[2];
+
+};
+
+
+#endif /* PCF8591_H_ */