Simon Ford
/
MAX5842
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Revision 0:f064d28957e3, committed 2009-09-01
- Comitter:
- simon
- Date:
- Tue Sep 01 21:57:24 2009 +0000
- Commit message:
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /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