common/cmd_dtt.c

   1 /*
   2  * (C) Copyright 2001
   3  * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <config.h>
  26 #include <command.h>
  27
  28 #include <dtt.h>
  29 #include <i2c.h>
  30
  31 int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  32 {
  33         int i;
  34         unsigned char sensors[] = CONFIG_DTT_SENSORS;
  35         int old_bus;
  36
  37         /* switch to correct I2C bus */
  38         old_bus = I2C_GET_BUS();
  39         I2C_SET_BUS(CFG_DTT_BUS_NUM);
  40
  41         /*
  42          * Loop through sensors, read
  43          * temperature, and output it.
  44          */
  45         for (i = 0; i < sizeof (sensors); i++)
  46                 printf ("DTT%d: %i C\n", i + 1, dtt_get_temp (sensors[i]));
  47
  48         /* switch back to original I2C bus */
  49         I2C_SET_BUS(old_bus);
  50
  51         return 0;
  52 }       /* do_dtt() */
  53
  54 /***************************************************/
  55
  56 U_BOOT_CMD(
  57           dtt,  1,      1,      do_dtt,
  58           "dtt     - Digital Thermometer and Thermostat\n",
  59           "        - Read temperature from digital thermometer and thermostat.\n"
  60 );