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 
00021 #ifdef TARGET_SSCI824
00022 Serial pc(USBTX,USBRX);
00023 AnalogIn   ain(P0_13);
00024 DigitalOut dout(P0_16);
00025 #endif
00026 
00027 #ifdef TARGET_NUCLEO_F303K8
00028 Serial pc(USBTX,USBRX);
00029 AnalogIn   ain(PA_7);
00030 DigitalOut dout(PB_1);
00031 #endif
00032 
00033 void disablePullUp(void)
00034 {
00035 #ifdef TARGET_SSCI824
00036     DigitalIn pin(P0_13);
00037 #endif
00038 #ifdef TARGET_NUCLEO_F303K8
00039     DigitalIn pin(PA_7);
00040 #endif
00041     pin.mode(PullNone);
00042 }
00043 
00044 int main(void)
00045 {
00046     disablePullUp();
00047     while (1) {
00048         // test the voltage on the initialized analog pin
00049         //  and if greater than 0.3 * VCC set the digital pin
00050         //  to a logic 1 otherwise a logic 0
00051         if(ain > 0.5f) {
00052             dout = 1;
00053         } else {
00054             dout = 0;
00055         }
00056                 
00057         // print the percentage and 16 bit normalized values
00058         pc.printf("percentage: %3.3f%%\n", ain.read()*100.0f);
00059         pc.printf("normalized: 0x%04X \n", ain.read_u16());
00060         wait(0.2f);
00061     }
00062 }