SHENG-HEN HSIEH / Mbed 2 deprecated MLX90614_STM32compatible

works fine on STM

Dependencies:   mbed

main.cpp@3:5811c736c8ef, 2017-02-15 (annotated)

Committer:
open4416
Date:
Wed Feb 15 11:35:37 2017 +0000
Revision:
3:5811c736c8ef
Parent:
2:09b8571eb8ce 
bug in Buff high byte

Who changed what in which revision?

UserRevisionLine numberNew contents of line
open4416 0:ec2a1057416b 1 #include "mbed.h"
open4416 0:ec2a1057416b 2
open4416 0:ec2a1057416b 3 #define MLX90614_ADDR (0x5A) // Slave address
open4416 0:ec2a1057416b 4 #define MLX90614_TOBJ (0x07) // Object temperature register
open4416 0:ec2a1057416b 5
open4416 0:ec2a1057416b 6 DigitalOut led(D13); //link leg
open4416 0:ec2a1057416b 7 I2C i2c(D14, D15); //I2C reg(SDA, SCL)
open4416 0:ec2a1057416b 8 Serial pc(D1, D0); //Serial reg
open4416 0:ec2a1057416b 9 Ticker TT; //call a timer
open4416 0:ec2a1057416b 10
open4416 0:ec2a1057416b 11 char data_write[1]; //buff for write
open4416 0:ec2a1057416b 12 char data_read [3]; //buff for read
open4416 0:ec2a1057416b 13 short Buff = 0x00;
open4416 0:ec2a1057416b 14 float TOBJ = 0.0;
open4416 0:ec2a1057416b 15 void read_MLX();
open4416 0:ec2a1057416b 16
open4416 0:ec2a1057416b 17 int main()
open4416 0:ec2a1057416b 18 {
open4416 0:ec2a1057416b 19 led = 0;
open4416 0:ec2a1057416b 20 pc.baud(9600); //set baud rate
open4416 1:f23e11d251ff 21 i2c.frequency(100000); //100kHz
open4416 0:ec2a1057416b 22 read_MLX(); //update MLX data
open4416 0:ec2a1057416b 23 TOBJ = ((float)Buff * 0.02f) - 273.0f;
open4416 0:ec2a1057416b 24 printf("%.2f\n",TOBJ);
open4416 0:ec2a1057416b 25 }
open4416 0:ec2a1057416b 26
open4416 0:ec2a1057416b 27
open4416 0:ec2a1057416b 28 void read_MLX(void) //read MLX data give raw data
open4416 0:ec2a1057416b 29 {
open4416 0:ec2a1057416b 30 led = 1;
open4416 0:ec2a1057416b 31 //TOBJ
open4416 0:ec2a1057416b 32 data_write[0] = MLX90614_TOBJ; //TOBJ address to buff
open4416 0:ec2a1057416b 33 i2c.write( MLX90614_ADDR<<1 | 0x00, data_write, 1, 1); //command to RAM access SR activated
open4416 0:ec2a1057416b 34 i2c.read ( MLX90614_ADDR<<1 | 0x01, data_read , 3, 0); //read callback
open4416 3:5811c736c8ef 35 Buff = data_read[1] << 8; // merging
open4416 0:ec2a1057416b 36 Buff |= data_read[0];
open4416 0:ec2a1057416b 37 led = 0;
open4416 0:ec2a1057416b 38 }