3 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
31 static unsigned long sensor_initialized;
33 int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
36 unsigned char sensors[] = CONFIG_DTT_SENSORS;
39 /* Force a compilation error, if there are more then 32 sensors */
40 BUILD_BUG_ON(sizeof(sensors) > 32);
41 /* switch to correct I2C bus */
42 old_bus = I2C_GET_BUS();
43 I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
46 * Loop through sensors, read
47 * temperature, and output it.
49 for (i = 0; i < sizeof(sensors); i++) {
50 if ((sensor_initialized & (1 << i)) == 0) {
51 if (dtt_init_one(sensors[i]) != 0) {
52 printf("DTT%d: Failed init!\n", i);
55 sensor_initialized |= (1 << i);
57 printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
60 /* switch back to original I2C bus */
66 /***************************************************/
70 "Read temperature from Digital Thermometer and Thermostat",