Read an analog value using ADC.

Dependencies:   mbed

Committer:
bcostm
Date:
Fri Feb 21 10:22:49 2014 +0000
Revision:
0:c2d1ad5059da
Child:
1:0490a15c76e4
Initial version.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bcostm 0:c2d1ad5059da 1 #include "mbed.h"
bcostm 0:c2d1ad5059da 2
bcostm 0:c2d1ad5059da 3 AnalogIn analog_value(A0);
bcostm 0:c2d1ad5059da 4
bcostm 0:c2d1ad5059da 5 DigitalOut myled(LED1);
bcostm 0:c2d1ad5059da 6
bcostm 0:c2d1ad5059da 7 // Calculate the corresponding acquisition measure for a given value in mV
bcostm 0:c2d1ad5059da 8 #define MV(x) ((0xFFF*x)/3300)
bcostm 0:c2d1ad5059da 9
bcostm 0:c2d1ad5059da 10 int main() {
bcostm 0:c2d1ad5059da 11 while(1) {
bcostm 0:c2d1ad5059da 12 uint16_t meas = analog_value.read_u16(); // Converts and read the analog input value
bcostm 0:c2d1ad5059da 13 if (meas > MV(1000)) { // If the value is greater than 1000 mV toggle the LED
bcostm 0:c2d1ad5059da 14 myled = !myled;
bcostm 0:c2d1ad5059da 15 }
bcostm 0:c2d1ad5059da 16 wait(0.2); // 200 ms
bcostm 0:c2d1ad5059da 17 }
bcostm 0:c2d1ad5059da 18 }