Mario Baldini / Mbed 2 deprecated GE_ChipCap2

Program to read temperature and humidity over I2C from the GE ChipCap2 sensor, using the MBED LPC11U24 board. !!! NOT WORKING !!! This reference program for Arduino DO work: http://hastebin.com/tilolukave.go If you locate the error please let me know at mario@baldini.systems

Dependencies:   mbed

main.cpp@1:7008e7b00996, 2014-08-11 (annotated)

Committer:
mbn12
Date:
Mon Aug 11 13:50:16 2014 +0000
Revision:
1:7008e7b00996
Parent:
0:9ce639d07eeb 
Updated version, working.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbn12 0:9ce639d07eeb 1 /*
mbn12 0:9ce639d07eeb 2
mbn12 0:9ce639d07eeb 3 Program to read temperature and humidity over I2C
mbn12 0:9ce639d07eeb 4 from the GE ChipCap2 sensor, using the MBED LPC11U24 board.
mbn12 0:9ce639d07eeb 5
mbn12 0:9ce639d07eeb 6 Autor: Mario Baldini <mario@baldini.systems>
mbn12 0:9ce639d07eeb 7 2014/08
mbn12 0:9ce639d07eeb 8
mbn12 0:9ce639d07eeb 9 Reading the output (in linux): sudo screen /dev/ttyACM0 115200
mbn12 0:9ce639d07eeb 10
mbn12 0:9ce639d07eeb 11
mbn12 0:9ce639d07eeb 12 */
mbn12 0:9ce639d07eeb 13
mbn12 0:9ce639d07eeb 14 #include "mbed.h"
mbn12 0:9ce639d07eeb 15
mbn12 0:9ce639d07eeb 16 Serial pc(USBTX, USBRX);
mbn12 0:9ce639d07eeb 17 I2C i2c(p28,p27); //sda,scl
mbn12 0:9ce639d07eeb 18
mbn12 0:9ce639d07eeb 19
mbn12 0:9ce639d07eeb 20 int main() {
mbn12 1:7008e7b00996 21
mbn12 0:9ce639d07eeb 22 pc.baud(115200);
mbn12 0:9ce639d07eeb 23
mbn12 1:7008e7b00996 24 i2c.frequency(400000);
mbn12 1:7008e7b00996 25 char wake_cmd[3];
mbn12 0:9ce639d07eeb 26 char data[4];
mbn12 1:7008e7b00996 27 float humidity;
mbn12 1:7008e7b00996 28 float temperatureC;
mbn12 1:7008e7b00996 29 const int addr = 0x28 << 1;
mbn12 0:9ce639d07eeb 30
mbn12 0:9ce639d07eeb 31 while(true) {
mbn12 1:7008e7b00996 32
mbn12 0:9ce639d07eeb 33 data[0] = 0x00;
mbn12 0:9ce639d07eeb 34 data[1] = 0x00;
mbn12 0:9ce639d07eeb 35 data[2] = 0x00;
mbn12 0:9ce639d07eeb 36 data[3] = 0x00;
mbn12 1:7008e7b00996 37
mbn12 1:7008e7b00996 38 wake_cmd[0] = 0xA0;
mbn12 1:7008e7b00996 39 wake_cmd[1] = 0x00;
mbn12 1:7008e7b00996 40 wake_cmd[1] = 0x00;
mbn12 1:7008e7b00996 41 i2c.write(addr, wake_cmd, 3);
mbn12 0:9ce639d07eeb 42
mbn12 0:9ce639d07eeb 43 wait_ms(50);
mbn12 0:9ce639d07eeb 44
mbn12 0:9ce639d07eeb 45
mbn12 1:7008e7b00996 46 i2c.read(addr, data, 4);
mbn12 1:7008e7b00996 47
mbn12 1:7008e7b00996 48 pc.printf("Raw Data[]\t 0x%X 0x%X 0x%X 0x%X \r\n", data[0],data[1],data[2],data[3]);
mbn12 0:9ce639d07eeb 49
mbn12 1:7008e7b00996 50 humidity = (((data[0] & 63) << 8) + data[1]) / 163.84;
mbn12 1:7008e7b00996 51 temperatureC = (((data[2] << 6) + (data[3] / 4)) / 99.29) - 40;
mbn12 1:7008e7b00996 52 pc.printf("Humidity: %.2f \t Temperature (C): %.2f \r\n\n", humidity, temperatureC);
mbn12 1:7008e7b00996 53
mbn12 1:7008e7b00996 54 wait_ms(1000);
mbn12 0:9ce639d07eeb 55 }
mbn12 0:9ce639d07eeb 56 }