Alan Matheson
A port of AD9850/51 code from Arduino source. This port allows direct input of the frequency in Mega Hertz rather than a series of Hex digits as in Liam Goudges program.
Revision 1:44d13dabc8e9, committed 2014-02-10
- Comitter:
- alan_matheson
- Date:
- Mon Feb 10 00:17:37 2014 +0000
- Parent:
- 0:bea0000c5526
- Commit message:
- AD9850 program ported from Arduino code by Alan Matheson
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- a/main.cpp Sun Feb 09 23:13:55 2014 +0000
+++ b/main.cpp Mon Feb 10 00:17:37 2014 +0000
@@ -1,12 +1,12 @@
#include "mbed.h"
/*
- * A simple single freq AD9850 Arduino test script
- * Original AD9851 DDS sketch by Andrew Smallbone at www.rocketnumbernine.com
- * Modified for testing the inexpensive AD9850 ebay DDS modules
+ * This program is a port of an AD9851 DDS Arduino sketch by Andrew Smallbone at www.rocketnumbernine.com
+ * It was later modified for testing the inexpensive AD9850 ebay DDS modules
* Pictures and pinouts at nr8o.dhlpilotcentral.com
- * 9850 datasheet at http://www.analog.com/static/imported-files/data_sheets/AD9850.pdf
+ * AD9850 datasheet at http://www.analog.com/static/imported-files/data_sheets/AD9850.pdf
* Use freely
+ * Ported by Alan Matheson on 20 February 2014
*/
@@ -18,6 +18,10 @@
#define pulseHigh(pin) {pin = 1; pin = 0; }
+ // Pins used are the same as those used in the MBED driver for AD9850 digital synthesizer using hacked SPI interface
+ // by Liam Goudge Sept 2013
+ // This program allows the desired frequency in MegaHertz to be directly entered and uses bitbanging rather than the SPI pins.
+
// configure data pins for output
@@ -67,17 +71,13 @@
pulseHigh(FQ_UD); // this pulse enables serial mode - Datasheet page 12 figure 10
-
-
-
while(1)
{
- frequency = 10.0034;
- {
- sendFrequency(frequency);
- pulseHigh(FQ_UD);
- wait(5.0);
- }
+ frequency = 7.080;
+ sendFrequency(frequency);
+ pulseHigh(FQ_UD);
+ wait(5.0);
+ }
}
}