Team 1 / Mbed 2 deprecated HYDRO-pH-BASIC

Basic pH read program for HAOSHI H-101 pH probe Still needs calibrating requires only 5V and ADC pin

Dependencies:   mbed Map

main.cpp@0:4494f6ceb276, 2019-04-08 (annotated)

Committer:
dnonoo
Date:
Mon Apr 08 13:05:19 2019 +0000
Revision:
0:4494f6ceb276
Child:
1:ab2a9277c379
basic pH program on DISCO-1 429ZI; Requires only 5V and ADC in pin; portable to any board

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dnonoo 0:4494f6ceb276 1 #include "mbed.h"
dnonoo 0:4494f6ceb276 2 #include "Map.hpp"
dnonoo 0:4494f6ceb276 3
dnonoo 0:4494f6ceb276 4 #
dnonoo 0:4494f6ceb276 5
dnonoo 0:4494f6ceb276 6 DigitalOut led_green(LED1);
dnonoo 0:4494f6ceb276 7 DigitalOut led_red(LED2);
dnonoo 0:4494f6ceb276 8
dnonoo 0:4494f6ceb276 9 InterruptIn user_button(USER_BUTTON);
dnonoo 0:4494f6ceb276 10 AnalogIn ph (PB_0);
dnonoo 0:4494f6ceb276 11 Serial pc (USBTX, USBRX);
dnonoo 0:4494f6ceb276 12
dnonoo 0:4494f6ceb276 13 float buf[10], temp;
dnonoo 0:4494f6ceb276 14 float avg;
dnonoo 0:4494f6ceb276 15 float phval;
dnonoo 0:4494f6ceb276 16
dnonoo 0:4494f6ceb276 17 Map map (0, 1.0f, 0, 14);
dnonoo 0:4494f6ceb276 18
dnonoo 0:4494f6ceb276 19 int main()
dnonoo 0:4494f6ceb276 20 {
dnonoo 0:4494f6ceb276 21 pc.baud(9600);
dnonoo 0:4494f6ceb276 22
dnonoo 0:4494f6ceb276 23 while (1) {
dnonoo 0:4494f6ceb276 24
dnonoo 0:4494f6ceb276 25 for (int i = 0; i < 10; i++) { //read values from sensor
dnonoo 0:4494f6ceb276 26 buf[i] = ph.read();
dnonoo 0:4494f6ceb276 27 //pc.printf("read %.2f\n\r", buf[i]);
dnonoo 0:4494f6ceb276 28 wait(0.1);
dnonoo 0:4494f6ceb276 29 }// end for 1
dnonoo 0:4494f6ceb276 30 for (int i = 0; i < 9;i++) { // sort values from smallest to lowest
dnonoo 0:4494f6ceb276 31 for(int j = i+1; j < 10; j++) {
dnonoo 0:4494f6ceb276 32 if (buf[i] > buf[j]) {
dnonoo 0:4494f6ceb276 33 temp = buf[i]; // shift data
dnonoo 0:4494f6ceb276 34 buf[i] = buf[j];
dnonoo 0:4494f6ceb276 35 buf[j] = temp;
dnonoo 0:4494f6ceb276 36
dnonoo 0:4494f6ceb276 37 } // end if 3
dnonoo 0:4494f6ceb276 38 } //end for 2
dnonoo 0:4494f6ceb276 39 }//end for 1
dnonoo 0:4494f6ceb276 40
dnonoo 0:4494f6ceb276 41 avg = 0;
dnonoo 0:4494f6ceb276 42 for (int i = 2; i < 8; i++) { // average 6 centre values
dnonoo 0:4494f6ceb276 43 avg +=buf[i];
dnonoo 0:4494f6ceb276 44 }// end for 1
dnonoo 0:4494f6ceb276 45 avg = avg/6;
dnonoo 0:4494f6ceb276 46 pc.printf("avg = %.2f\n\r", avg);
dnonoo 0:4494f6ceb276 47 phval = map.Calculate(avg);
dnonoo 0:4494f6ceb276 48 pc.printf("pH = %.2f\n\r", phval);
dnonoo 0:4494f6ceb276 49 }// end while 1
dnonoo 0:4494f6ceb276 50 }// end main