Revision 0:f064d28957e3, committed 2009-09-01

Comitter:

simon

Date:

Tue Sep 01 21:57:24 2009 +0000

Commit message:

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Sep 01 21:57:24 2009 +0000
@@ -0,0 +1,38 @@
+// example code to get MAX5842 working
+// Copyright (c) 2009, sford
+// Released under the MIT License: http://mbed.org/license/mit
+
+// MAX5842 setup: ADD = 0v, REF = 3.3v, OUTA -> p16
+
+#include "mbed.h"
+
+AnalogIn result(p16); // input to test MAX5842 output 
+DigitalOut led(LED1);
+
+I2C max5842(p9, p10);
+
+int main() {
+
+    max5842.frequency(400000); // 400 KHz
+    
+    // ADDR: 011 110 ADD, where ADD = 0 
+    // 011 1100 == 0x3C
+    const int addr = 0x3C;
+
+    // Power up the DAC
+    // - Extended Commands [ 1111 0000 xx DCBA PD1 PD0 ]
+    // - DCBA = 1111 means select all, PD = 00 means power on
+    char power_up[2] = {0xF0, 0x3C};
+    max5842.write(addr, power_up, 2);
+    
+    // set A output to 50%
+    //   0 (set A) D DD
+    char data[2] = {0x08, 0x00};
+    max5842.write(addr, data, 2);
+
+    while(1) {
+        printf("res = %f\n", result.read());
+        led = !led;
+        wait(0.25);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Tue Sep 01 21:57:24 2009 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/1c1ebd0324fa