/* * (C) Copyright 2008 * Ricado Ribalda-Universidad Autonoma de Madrid, ricardo.ribalda@uam.es * This work has been supported by: QTechnology http://qtec.com/ * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <common.h> #include <i2c.h> #include <dtt.h> #define ADT7460_ADDRESS 0x2c #define ADT7460_INVALID 128 #define ADT7460_CONFIG 0x40 #define ADT7460_REM1_TEMP 0x25 #define ADT7460_LOCAL_TEMP 0x26 #define ADT7460_REM2_TEMP 0x27 int dtt_read(int sensor, int reg) { u8 dir = reg; u8 data; if (i2c_read(ADT7460_ADDRESS, dir, 1, &data, 1) == -1) return -1; if (data == ADT7460_INVALID) return -1; return data; } int dtt_write(int sensor, int reg, int val) { u8 dir = reg; u8 data = val; if (i2c_write(ADT7460_ADDRESS, dir, 1, &data, 1) == -1) return -1; return 0; } int dtt_init(void) { printf("ADT7460 at I2C address 0x%2x\n", ADT7460_ADDRESS); if (dtt_write(0, ADT7460_CONFIG, 1) == -1) { puts("Error initialiting ADT7460\n"); return -1; } return 0; } int dtt_get_temp(int sensor) { int aux; u8 table[] = { ADT7460_REM1_TEMP, ADT7460_LOCAL_TEMP, ADT7460_REM2_TEMP }; if (sensor > 2) { puts("DTT sensor does not exist\n"); return -1; } aux = dtt_read(0, table[sensor]); if (aux == -1) { puts("DTT temperature read failed\n"); return -1; } return aux; }