William Marsh
Lab 3 example 2, no debugging
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DACandticker_sample_with_debug
by 
William Marsh
DAC Ticker
- Sample code for part 2 of lab 3 using the DAC, called from a Ticker.
- Note that to use AnalogOut from the Ticker (an ISR), we create a version without locking.
Diff: main.cpp
- Revision:
- 2:e27fd3b65155
- Parent:
- 1:18e0f8aef32f
- Child:
- 3:2bf79a3c3cbc
--- a/main.cpp Wed Feb 01 13:53:26 2017 +0000
+++ b/main.cpp Wed Jan 24 22:56:54 2018 +0000
@@ -3,10 +3,11 @@
// Periodically write to the AnalogOut to create a sine wave
// Alternate between two fixed frequencies every 5 sec
//
+// Updated for mbed 5
+
// THIS VERSION HAS NO DEBUGGING CODE
#include "mbed.h"
-#include "rtos.h"
#include "sineTable.h"
Ticker tick ; // Creates periodic interrupt
@@ -14,7 +15,7 @@
// Function called periodically
// Write new value to AnalogOut
-volatile int index = 0 ; // this variable is not just for debugging!!
+volatile int index = 0 ; // index into array of sin values
void writeAout() {
ao.write_u16(sine[index]) ;
index = (index + 1) % 64 ;