jack kemnitz / Mbed 2 deprecated Temperature_Reading

temperature reading

Dependencies:   mbed

main.cpp@0:1f9fae46bbe1, 2017-08-11 (annotated)

Committer:
212600191
Date:
Fri Aug 11 16:20:22 2017 +0000
Revision:
0:1f9fae46bbe1
temperature;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
212600191 0:1f9fae46bbe1 1 #include "mbed.h"
212600191 0:1f9fae46bbe1 2
212600191 0:1f9fae46bbe1 3 // Read temperature from LM75BD
212600191 0:1f9fae46bbe1 4
212600191 0:1f9fae46bbe1 5 I2C i2c(PB_9 , PB_8 );
212600191 0:1f9fae46bbe1 6
212600191 0:1f9fae46bbe1 7 Serial pc (SERIAL_TX, SERIAL_RX);
212600191 0:1f9fae46bbe1 8
212600191 0:1f9fae46bbe1 9 const int addr7bit = 0x48; // 7 bit I2C address
212600191 0:1f9fae46bbe1 10 const int addr8bit = 0x48 << 1; // 8bit I2C address, 0x90
212600191 0:1f9fae46bbe1 11
212600191 0:1f9fae46bbe1 12 int main() {
212600191 0:1f9fae46bbe1 13 pc.baud(250000);
212600191 0:1f9fae46bbe1 14 char cmd[2];
212600191 0:1f9fae46bbe1 15 while (1) {
212600191 0:1f9fae46bbe1 16 cmd[0] = 0x01;
212600191 0:1f9fae46bbe1 17 cmd[1] = 0x00;
212600191 0:1f9fae46bbe1 18 i2c.write(addr8bit, cmd, 2);
212600191 0:1f9fae46bbe1 19
212600191 0:1f9fae46bbe1 20 wait(0.5);
212600191 0:1f9fae46bbe1 21
212600191 0:1f9fae46bbe1 22 cmd[0] = 0x00;
212600191 0:1f9fae46bbe1 23 i2c.write(addr8bit, cmd, 1);
212600191 0:1f9fae46bbe1 24 i2c.read( addr8bit, cmd, 2);
212600191 0:1f9fae46bbe1 25
212600191 0:1f9fae46bbe1 26 float tmp = (float((cmd[0]<<8)|cmd[1]) / 256.0);
212600191 0:1f9fae46bbe1 27 printf("Temp = %.2f\r\n", tmp);
212600191 0:1f9fae46bbe1 28 }
212600191 0:1f9fae46bbe1 29 }