This program senses the analogue voltage of a potentiometer using the MBED LPC1768
Embed:
(wiki syntax)
Show/hide line numbers
main.cpp
00001 #include "mbed.h" 00002 /* This program reads output from built-in analogue to digital converter (ADC) */ 00003 00004 /* Define some useful constants */ 00005 #define ON 1 00006 #define OFF 0 00007 00008 /* Create objects for input/output */ 00009 AnalogIn pot_reading(p15); /* ADC input is connected to Pin 15 */ 00010 00011 /* Create names for lights */ 00012 DigitalOut light1(LED1); /* Control LED1 using light1 */ 00013 DigitalOut light2(LED2); /* Control LED2 using light2 */ 00014 DigitalOut light3(LED3); /* Control LED3 using light3 */ 00015 DigitalOut light4(LED4); /* Control LED4 using light4 */ 00016 00017 /* Main loop */ 00018 int main() 00019 { 00020 float reading; /* A variable is needed to store ADC reading */ 00021 00022 /* Define a while loop that runs forever (or until the MBED is reset) */ 00023 while(1) 00024 { 00025 reading=pot_reading; /* store reading from the ADC into variable 'reading' */ 00026 if(reading > 0.5) /* Checks whether value stored in 'reading' is greater than 0.5 */ 00027 { 00028 light1=ON; /* light1 is turned on when ADC reading exceeds 0.5 */ 00029 } 00030 else 00031 { 00032 light1=OFF; /* light1 is turned off when ADC reading is less than 0.5 */ 00033 } 00034 wait(0.1); /* Pause for 0.1 seconds before taking another reading */ 00035 } 00036 }
Generated on Wed Jul 27 2022 11:39:59 by
1.7.2