Added api for reading out tmp100 x100 temps

This commit is contained in:
Joakim Eriksson 2012-01-03 10:45:03 -08:00 committed by Niclas Finne
parent 65163a9b57
commit 0ea95c21b3
2 changed files with 23 additions and 12 deletions

View File

@ -160,13 +160,8 @@ tmp102_read_temp_raw (void)
return rd; return rd;
} }
/*---------------------------------------------------------------------------*/ int16_t
/* Simple Read temperature. Return is an integer with temperature in 1deg. precision tmp102_read_temp_x100(void)
Return value is a signed 8 bit integer.
*/
int8_t
tmp102_read_temp_simple (void)
{ {
int16_t raw = 0; int16_t raw = 0;
int8_t rd = 0; int8_t rd = 0;
@ -181,8 +176,9 @@ tmp102_read_temp_simple (void)
abstemp = raw; abstemp = raw;
} }
/* Integer part of the temperature value */ /* Integer part of the temperature value and percents*/
temp_int = (abstemp >> 8) * sign; temp_int = (abstemp >> 8) * sign * 100;
temp_int += ((abstemp & 0xff) * 100) / 0x100;
/* See test-tmp102.c on how to print values of temperature with decimals /* See test-tmp102.c on how to print values of temperature with decimals
fractional part in 1/10000 of degree fractional part in 1/10000 of degree
@ -191,6 +187,16 @@ tmp102_read_temp_simple (void)
Data could be multiplied by 64 (<< 6) to trade-off precision for speed Data could be multiplied by 64 (<< 6) to trade-off precision for speed
*/ */
rd = (int8_t) (temp_int); return temp_int;
return rd; }
/*---------------------------------------------------------------------------*/
/* Simple Read temperature. Return is an integer with temperature in 1deg. precision
Return value is a signed 8 bit integer.
*/
int8_t
tmp102_read_temp_simple (void)
{
return (int8_t) tmp102_read_temp_x100() / 100;
} }

View File

@ -72,6 +72,11 @@ u16_t tmp102_read_temp_raw();
*/ */
int8_t tmp102_read_temp_simple(); int8_t tmp102_read_temp_simple();
/* Read only integer part of the temperature in 1deg. precision.
no args needed
*/
int16_t tmp102_read_temp_x100();
/* -------------------------------------------------------------------------- */ /* -------------------------------------------------------------------------- */
/* Reference definitions */ /* Reference definitions */
/* TMP102 slave address */ /* TMP102 slave address */