Tedd OKANO / test_LM75B

example project to explain how to write a class library

test_LM75B.cpp@0:6ecb302da815, 2014-11-03 (annotated)

Committer:
okano
Date:
Mon Nov 03 00:06:50 2014 +0000
Revision:
0:6ecb302da815
Child:
1:239684cd8ae9
device access is made as a class

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okano 0:6ecb302da815 1 #include "test_LM75B.h"
okano 0:6ecb302da815 2
okano 0:6ecb302da815 3 test_LM75B::test_LM75B( PinName sda, PinName scl ) : i2c( sda, scl )
okano 0:6ecb302da815 4 {
okano 0:6ecb302da815 5 init();
okano 0:6ecb302da815 6 }
okano 0:6ecb302da815 7
okano 0:6ecb302da815 8 test_LM75B::~test_LM75B()
okano 0:6ecb302da815 9 {
okano 0:6ecb302da815 10 }
okano 0:6ecb302da815 11
okano 0:6ecb302da815 12 void test_LM75B::init( void )
okano 0:6ecb302da815 13 {
okano 0:6ecb302da815 14 char command[ 2 ];
okano 0:6ecb302da815 15
okano 0:6ecb302da815 16 command[ 0 ] = LM75B_Conf;
okano 0:6ecb302da815 17 command[ 1 ] = 0x00;
okano 0:6ecb302da815 18
okano 0:6ecb302da815 19 i2c.write( ADDRESS_LM75B, command, 2 );
okano 0:6ecb302da815 20 }
okano 0:6ecb302da815 21
okano 0:6ecb302da815 22 float test_LM75B::read( void )
okano 0:6ecb302da815 23 {
okano 0:6ecb302da815 24 char command[ 2 ];
okano 0:6ecb302da815 25
okano 0:6ecb302da815 26 command[ 0 ] = LM75B_Temp;
okano 0:6ecb302da815 27
okano 0:6ecb302da815 28 i2c.write( ADDRESS_LM75B, command, 1 ); // Send command string
okano 0:6ecb302da815 29 i2c.read( ADDRESS_LM75B, command, 2 ); // read two bytes data
okano 0:6ecb302da815 30
okano 0:6ecb302da815 31 return ( (float)( (command[ 0 ] << 8)| command[1] ) / 256.0 );
okano 0:6ecb302da815 32 }
okano 0:6ecb302da815 33
okano 0:6ecb302da815 34