From 0ea95c21b3c3ccb2883c515b7f47cd3552d3183a Mon Sep 17 00:00:00 2001
From: Joakim Eriksson <joakime@sics.se>
Date: Tue, 3 Jan 2012 10:45:03 -0800
Subject: [PATCH] Added api for reading out tmp100 x100 temps

---
 platform/z1/dev/tmp102.c | 30 ++++++++++++++++++------------
 platform/z1/dev/tmp102.h |  5 +++++
 2 files changed, 23 insertions(+), 12 deletions(-)

diff --git a/platform/z1/dev/tmp102.c b/platform/z1/dev/tmp102.c
index 724cf57a5..9bf4691d2 100644
--- a/platform/z1/dev/tmp102.c
+++ b/platform/z1/dev/tmp102.c
@@ -160,13 +160,8 @@ tmp102_read_temp_raw (void)
   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)
+int16_t
+tmp102_read_temp_x100(void)
 {
   int16_t raw = 0;
   int8_t rd = 0;
@@ -181,9 +176,10 @@ tmp102_read_temp_simple (void)
     abstemp = raw;
   }
 
-  /* Integer part of the temperature value */
-  temp_int = (abstemp >> 8) * sign;
-
+  /* Integer part of the temperature value and percents*/
+  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 
      fractional part in 1/10000 of degree 
      temp_frac = ((abstemp >>4) % 16) * 625; 
@@ -191,6 +187,16 @@ tmp102_read_temp_simple (void)
      Data could be multiplied by 64 (<< 6) to trade-off precision for speed 
   */
 
-  rd = (int8_t) (temp_int);
-  return rd;
+  return temp_int;
+}
+
+/*---------------------------------------------------------------------------*/
+/* 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;
 }
diff --git a/platform/z1/dev/tmp102.h b/platform/z1/dev/tmp102.h
index bcaaeb556..db6fd5112 100644
--- a/platform/z1/dev/tmp102.h
+++ b/platform/z1/dev/tmp102.h
@@ -72,6 +72,11 @@ u16_t tmp102_read_temp_raw();
 */
 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 */
 /* TMP102 slave address */