AND / Mbed 2 deprecated I2CAmphenolNoError

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   mbed

main.cpp@5:6ad8bceabbfe, 2019-08-09 (annotated)

Committer:
christodoulos
Date:
Fri Aug 09 09:40:43 2019 +0000
Revision:
5:6ad8bceabbfe
Parent:
3:3d51f8870e91 
For Amphenol CO2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
christodoulos 0:d034cdad5b6d 1 #include "mbed.h"
christodoulos 5:6ad8bceabbfe 2
christodoulos 5:6ad8bceabbfe 3 I2C i2c(A4,A5);
christodoulos 5:6ad8bceabbfe 4 int readDelay=0.5;
christodoulos 5:6ad8bceabbfe 5 int measureDelay=10;
christodoulos 5:6ad8bceabbfe 6 const int ADDR_8bit = 0x15;
christodoulos 5:6ad8bceabbfe 7 const int ADDR_6700 = 0x15 << 1;
christodoulos 0:d034cdad5b6d 8
christodoulos 5:6ad8bceabbfe 9 int getCO2PPM() {
christodoulos 5:6ad8bceabbfe 10 char data[5];
christodoulos 5:6ad8bceabbfe 11 char measure[5]={0x04,0x13,0x8B,0x00,0x01};
christodoulos 5:6ad8bceabbfe 12 i2c.start();
christodoulos 5:6ad8bceabbfe 13 i2c.write(ADDR_6700,measure,5);
christodoulos 5:6ad8bceabbfe 14 i2c.stop();
christodoulos 5:6ad8bceabbfe 15 wait(readDelay);
christodoulos 5:6ad8bceabbfe 16
christodoulos 5:6ad8bceabbfe 17 i2c.read(ADDR_6700,data,4);
christodoulos 5:6ad8bceabbfe 18
christodoulos 5:6ad8bceabbfe 19 return ((data[2]&0x3F)<<8)|data[3];
christodoulos 0:d034cdad5b6d 20
christodoulos 5:6ad8bceabbfe 21 }
mehrnaz 2:ef98576cd67b 22 int main()
christodoulos 0:d034cdad5b6d 23 {
mehrnaz 3:3d51f8870e91 24
christodoulos 5:6ad8bceabbfe 25 while(1){
christodoulos 5:6ad8bceabbfe 26 int co2PPM=getCO2PPM()*100;
christodoulos 5:6ad8bceabbfe 27 float co2percentage=(float)co2PPM/10000;
christodoulos 5:6ad8bceabbfe 28 printf("%f\n", co2percentage);
christodoulos 5:6ad8bceabbfe 29 }
mehrnaz 3:3d51f8870e91 30
christodoulos 5:6ad8bceabbfe 31
mehrnaz 2:ef98576cd67b 32 }