![](/media/cache/group/mbed-logo-square-512_3.png.50x50_q85.png)
Simple example showcasing AnalogIn. Applying a voltage across the analog input pin causes the LED to light up. Can be tested with a small wire connected to VCC.
main.cpp
00001 /* mbed Example Program 00002 * Copyright (c) 2006-2014 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #include "mbed.h" 00018 00019 // Initialize a pins to perform analog input and digital output fucntions 00020 AnalogIn ain(A0); 00021 DigitalOut dout(LED1); 00022 00023 int main(void) 00024 { 00025 while (1) { 00026 // test the voltage on the initialized analog pin 00027 // and if greater than 0.3 * VCC set the digital pin 00028 // to a logic 1 otherwise a logic 0 00029 if(ain > 0.3f) { 00030 dout = 1; 00031 } else { 00032 dout = 0; 00033 } 00034 00035 // print the percentage and 16 bit normalized values 00036 printf("percentage: %3.3f%%\n", ain.read()*100.0f); 00037 printf("normalized: 0x%04X \n", ain.read_u16()); 00038 wait(0.2f); 00039 } 00040 }
Generated on Wed Jul 20 2022 23:23:04 by
![doxygen](doxygen.png)