AnalogOut Hello World
Dependencies: mbed
Use
The AnalogOut API is used to convert a digital number to an analog value. The output value is set as a percentage of the supply voltage. The percentage is specified as a floating point number between 0 to 1. This example demonstrates a ramp from 0 to 1 in 10% increments.
Note
Not all boards support analog output. The board must have a Digital to Analog Converter (DAC) to use the API. The compiler will throw a warning if the AnalogOut API is not available for a target board. Alternatively the target platform will list its components on the Platforms page.
API
API reference.
Import librarymbed
Diff: main.cpp
- Revision:
- 3:8b80a1c145ea
- Parent:
- 2:0c7214ae3894
- Child:
- 4:6c49a5b891dc
--- a/main.cpp Sun Sep 21 19:13:01 2014 +0000
+++ b/main.cpp Mon Sep 22 20:07:32 2014 +0000
@@ -1,13 +1,14 @@
#include "mbed.h"
-AnalogOut signal(p18);
+AnalogOut signal(PTE30); // change this to match your board
// ramp up the output in 10% incriments, drop to zero, repeat
int main() {
while(1) {
for(float i=0.0; i<1.0; i+=0.1) {
signal = i;
- wait(0.0001);
- }
+ wait(0.1);
+ printf("Signal = %f\n\r",i);
+ }
}
}
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