Diff: MCP4726.cpp

Revision:

0:f0980556dfc0

diff -r 000000000000 -r f0980556dfc0 MCP4726.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MCP4726.cpp	Wed Oct 15 14:42:50 2014 +0000
@@ -0,0 +1,62 @@
+//**********************
+// MCP4726.cpp for mbed
+//
+// MCP4726 mcp4726(P0_5,P0_4);
+// or
+// I2C i2c(P0_5,P0_4);
+// MCP4726 mcp4726(i2c);
+//
+// Max Frequency with I2C mode
+// Standard mode   3.4KHz=100KHz / 29bits
+// Fast mode      13.8KHz=400KHz / 29bits
+// Fast mode Plus 34.5KHz=1MHz / 29bits
+// HS mode        117KHz =3.4MHz / 29bits
+//
+// (C)Copyright 2014 All rights reserved by Y.Onodera
+// http://einstlab.web.fc2.com
+//**********************
+
+#include "mbed.h"
+#include "MCP4726.h"
+
+MCP4726::MCP4726 (PinName sda, PinName scl) : _i2c(sda, scl) {
+    init();
+}
+MCP4726::MCP4726 (I2C& p_i2c) : _i2c(p_i2c) {
+    init();
+}
+
+
+void MCP4726::put(unsigned short a)
+{
+
+    da.Val = a;
+    buf[0]=0x0F & da.byte.HB;
+    buf[1]=da.byte.LB;
+    _i2c.write(MCP4726_ADDR, buf, 2);
+ 
+}
+
+
+void MCP4726::init()
+{
+
+    // Set fast mode
+    _i2c.frequency(400000);  // default 100Kbps
+
+    // wait POR 60us+
+    wait_us(100);
+
+    // reset
+//    buf[0]=0x06;
+//    _i2c.write(0x00, buf, 1);
+    // wakeup
+//    buf[0]=0x09;
+//    _i2c.write(0x00, buf, 1);
+        
+    // Set Configuration
+    buf[0]=0x80;
+    _i2c.write(MCP4726_ADDR, buf, 1);
+
+}
+