Diff: src/main.cpp

Revision:

1:a6835f6c84eb

Parent:

0:973a5bbb2a17

--- a/src/main.cpp	Thu Nov 21 08:46:20 2019 +0000
+++ b/src/main.cpp	Sun Dec 08 05:18:34 2019 +0000
@@ -1,69 +1,40 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <stdio.h>
 
+// Application helper
 #include "mbed.h"
-#define u16_max 65526
-AnalogIn mic(PB_0);
-DigitalOut vcc(GPIO0);
-Serial pc(UART_TX, UART_RX, 115200);
-const int sampleTime = 50;
-int micOut;
-// Find the Peak-to-Peak Amplitude Function
-int findPTPAmp(float* sampleArr){
-// Time variables to find the peak-to-peak amplitude
-   
-   unsigned int PTPAmp = 0; 
+#include <AnalogIn.h>
+#include <DigitalOut.h>
+
 
-// Signal variables to find the peak-to-peak amplitude
-   unsigned int maxAmp = 0;
-   unsigned int minAmp = 1023;
+// PIN DEFINITIONS
+DigitalOut vcc(GPIO0);
+AnalogIn mic(PB_0);
+
+// To sleep, 'wait' should be replaced by 'ThisThread::sleep_for' (C++) or 'thread_sleep_for' (C). If you wish to wait (without sleeping), call 'wait_us'. 'wait_us' is safe to call from ISR context. [since mbed-os-5.14] [-Wdeprecated-declarations] in "main.cpp", Line: 59, Col: 9
 
-// Find the max and min of the mic output within the 50 ms timeframe
-    for(int i=0; i<8000; i++)
-   {
-      if( sampleArr[i] < 1023) //prevent erroneous readings
-      {
-        if (sampleArr[i] > maxAmp)
-        {
-          maxAmp = sampleArr[i]; //save only the max reading
-        }
-        else if (sampleArr[i] < minAmp)
-        {
-          minAmp = sampleArr[i]; //save only the min reading
+int main() {
+    int ARR_SIZE = 8000;
+    vcc = 1;
+    uint16_t raw_vals[ARR_SIZE];
+    int i = 0; 
+    printf("Loading values...\n");
+    while(1) {
+        memset(raw_vals, 0, ARR_SIZE * sizeof(uint16_t));
+        i = 0;
+        for(i; i < ARR_SIZE; i++) { 
+            raw_vals[i] = mic.read_u16();
         }
-      }
-   }
-
-  PTPAmp = maxAmp - minAmp; // (max amp) - (min amp) = peak-to-peak amplitude
-  double micOut_Volts = (PTPAmp * 3.3) / 1024; // Convert ADC into voltage
-
-  //Uncomment this line for help debugging (be sure to also comment out the VUMeter function)
-  //Serial.println(PTPAmp); 
-
-  //Return the PTP amplitude to use in the soundLevel function. 
-  // You can also return the micOut_Volts if you prefer to use the voltage level.
-  return PTPAmp;   
-}
-
-void record(float* sampleArr) {
-    //record sound for 1 second
-    for(int i=0; i<8000; i++) {
-        sampleArr[i] = mic.read(); //put samples in array
-        wait(0.000125f); //sample rate of 8000 Hz
-    }  
-}
-
-int main(){
-    float sampleArr[8000]; //used to store sound 
-    pc.printf("\r\n Sparkfun MEM Microphone Test\n");   
-    pc.printf("******************\n");
-    vcc = 1;
-    unsigned int val;
-    int ptpAmp;
-    while(1){
-        wait(0.2); 
-        record(sampleArr); 
-        ptpAmp=findPTPAmp(sampleArr);
+        //printf("Done reading in values\n");
+        wait(1);
+        i = 0;
+        for(i; i < ARR_SIZE; i++) { 
+            printf("%u,", raw_vals[i]);
+        }
+        
+        while(1);
     }
 }
-
-     
-