project/commands/cmd_lm75b_gettemp.c

   1 /**************************************************************************/
   2 /*!
   3     @file     cmd_lm75b_gettemp.c
   4     @author   K. Townsend (microBuilder.eu)
   5
   6     @brief    Code to execute for cmd_lm75b_gettemp in the 'core/cmd'
   7               command-line interpretter.
   8
   9     @section LICENSE
  10
  11     Software License Agreement (BSD License)
  12
  13     Copyright (c) 2010, microBuilder SARL
  14     All rights reserved.
  15
  16     Redistribution and use in source and binary forms, with or without
  17     modification, are permitted provided that the following conditions are met:
  18     1. Redistributions of source code must retain the above copyright
  19     notice, this list of conditions and the following disclaimer.
  20     2. Redistributions in binary form must reproduce the above copyright
  21     notice, this list of conditions and the following disclaimer in the
  22     documentation and/or other materials provided with the distribution.
  23     3. Neither the name of the copyright holders nor the
  24     names of its contributors may be used to endorse or promote products
  25     derived from this software without specific prior written permission.
  26
  27     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
  28     EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  29     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  30     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
  31     DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  32     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  33     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  34     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  35     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  36     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /**************************************************************************/
  39 #include <stdio.h>
  40
  41 #include "projectconfig.h"
  42 #include "core/cmd/cmd.h"
  43 #include "project/commands.h"       // Generic helper functions
  44
  45 #ifdef CFG_LM75B
  46   #include "drivers/sensors/lm75b/lm75b.h"
  47
  48 /**************************************************************************/
  49 /*!
  50     Gets the current temperature in degrees celsius from the LM75B
  51 */
  52 /**************************************************************************/
  53 void cmd_lm75b_gettemp(uint8_t argc, char **argv)
  54 {
  55   int32_t temp = 0;
  56
  57   // Get the current temperature (in 0.125°C units)
  58   lm75bGetTemperature(&temp);
  59
  60   // Multiply value by 125 for fixed-point math (0.125°C per unit)
  61   temp *= 125;
  62
  63   // Use modulus operator to display decimal value
  64   printf("%d.%d C%s", temp / 1000, temp % 1000, CFG_PRINTF_NEWLINE);
  65 }
  66
  67 #endif