Analog_In.cpp

00001 
00002 #ifdef COMPILE_Analog_In
00003 
00004 AnalogIn analog_value(A0);
00005 
00006 DigitalOut led(LED1);
00007 
00008 int main()
00009 {
00010     float meas_r;
00011     float meas_v;
00012     
00013     printf("\nAnalogIn example\n");
00014 
00015     while(1) {
00016 
00017         meas_r = analog_value.read(); // Read the analog input value (value from 0.0 to 1.0 = full ADC conversion range)
00018         meas_v = meas_r * 3300; // Converts value in the 0V-3.3V range
00019         
00020         // Display values
00021         printf("measure = %f = %.0f mV\n", meas_r, meas_v);
00022 
00023         // LED is ON is the value is below 1V
00024         if (meas_v < 1000) {
00025             led = 1; // LED ON
00026         } else {
00027             led = 0; // LED OFF
00028         }
00029 
00030         wait(1.0); // 1 second
00031     }
00032 }
00033 
00034 
00035 #endif