Range Finder (Version 1) - Indicator LEDs at 50cm and 70cm
Dependencies: mbed
Fork of MaxSonar_EZ1_Analog by
main.cpp
- Committer:
- shimniok
- Date:
- 2011-01-25
- Revision:
- 0:9dfac5da16a9
- Child:
- 1:b3590ab2a8ae
File content as of revision 0:9dfac5da16a9:
#include "mbed.h" // MaxSonar EZ1 test program // by Michael Shimniok http://www.bot-thoughts.com/ // // Based on datasheet here: http://www.maxbotix.com/uploads/LV-MaxSonar-EZ1-Datasheet.pdf // Reads from AN (analog) pin connected to mbed p20, assumes 3.3V supply to EZ1 module. // // mbed -> EZ1 // ----------- // VOUT -> +5 // GND -> GND // p20 -> AN // AnalogIn ain(p20); Serial pc(USBTX, USBRX); // tx, rx int main() { float adc, volts, inches; int feet, in; pc.baud(115200); while (1){ adc = ain.read(); // read analog as a float volts = adc * 3.3; // convert to volts inches = volts / 0.0064; // 3.3V supply: 6.4mV per inch feet = (int) inches / 12; // inches to feet (trunc) in = (int) inches % 12; // remainder -> in(ches) pc.printf("%8.2f adc %8.2fV %8.2f in %d'%d\"\n", adc, volts, inches, feet, in); wait(0.05); // 20Hz update rate ; note we aren't truly synchronized to the device or anything... } }