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sensor-common.c
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1/*
2 * Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the copyright holder nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
28 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30/*---------------------------------------------------------------------------*/
31/**
32 * \addtogroup sensortag-cc26xx-sensor-common
33 * @{
34 *
35 * \file
36 * Utilities common among SensorTag sensors
37 */
38/*---------------------------------------------------------------------------*/
39#include "sensor-common.h"
40#include "board-i2c.h"
41/*---------------------------------------------------------------------------*/
42/* Data to use when an error occurs */
43#define ERROR_DATA 0xCC
44/*---------------------------------------------------------------------------*/
45static uint8_t buffer[32];
46/*---------------------------------------------------------------------------*/
47bool
48sensor_common_read_reg(uint8_t addr, uint8_t *buf, uint8_t len)
49{
50 return board_i2c_write_read(&addr, 1, buf, len);
51}
52/*---------------------------------------------------------------------------*/
53bool
54sensor_common_write_reg(uint8_t addr, uint8_t *buf, uint8_t len)
55{
56 uint8_t i;
57 uint8_t *p = buffer;
58
59 /* Copy address and data to local buffer for burst write */
60 *p++ = addr;
61 for(i = 0; i < len; i++) {
62 *p++ = *buf++;
63 }
64 len++;
65
66 /* Send data */
67 return board_i2c_write(buffer, len);
68}
69/*---------------------------------------------------------------------------*/
70void
71sensor_common_set_error_data(uint8_t *buf, uint8_t len)
72{
73 while(len > 0) {
74 len--;
75 buf[len] = ERROR_DATA;
76 }
77}
78/*---------------------------------------------------------------------------*/
79/** @} */
Header file for the Sensortag I2C Driver.
bool board_i2c_write(uint8_t *data, uint8_t len)
Burst write to an I2C device.
Definition board-i2c.c:145
bool board_i2c_write_read(uint8_t *wdata, uint8_t wlen, uint8_t *rdata, uint8_t rlen)
Write and read in one operation.
Definition board-i2c.c:247
void sensor_common_set_error_data(uint8_t *buf, uint8_t len)
Fill a result buffer with dummy error data.
bool sensor_common_read_reg(uint8_t addr, uint8_t *buf, uint8_t len)
Reads a sensor's register over I2C.
bool sensor_common_write_reg(uint8_t addr, uint8_t *buf, uint8_t len)
Write to a sensor's register over I2C.
Header file for the Sensortag Common sensor utilities.
static uip_ds6_addr_t * addr
Pointer to a nbr cache entry.
Definition uip-nd6.c:107