![](/media/cache/group/default_image.jpg.50x50_q85.jpg)
bla
Dependencies: mbed
Diff: main.cpp
- Revision:
- 0:c98fab4c30c9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Wed Jan 13 16:42:10 2016 +0000 @@ -0,0 +1,41 @@ +#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; + float inch; + float cm; + 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 + inches = volts / 0.0098; // 5V supply: 9.8mV per inch + feet = (int) inches / 12; // inches to feet (trunc) + in = (int) inches % 12; // remainder -> in(ches) + cm=in*2.54; + pc.printf("%8.2f adc %8.2fV %8.2f in %d'%d\ %8.2fcm ""\n", adc, volts, inches, feet, in,cm); + //pc.printf("%8.2f cm""\r",cm); + + //wait(0.05); + wait(0.5); // 20Hz update rate ; note we aren't truly synchronized to the device or anything... + } +} + \ No newline at end of file