Contiki-NG
sensor-common.c
Go to the documentation of this file.
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 /*---------------------------------------------------------------------------*/
45 static uint8_t buffer[32];
46 /*---------------------------------------------------------------------------*/
47 bool
48 sensor_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 /*---------------------------------------------------------------------------*/
53 bool
54 sensor_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 /*---------------------------------------------------------------------------*/
70 void
71 sensor_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.
static uip_ds6_addr_t * addr
Pointer to a nbr cache entry.
Definition: uip-nd6.c:107
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.
Definition: sensor-common.c:71
bool board_i2c_write(uint8_t *data, uint8_t len)
Burst write to an I2C device.
Definition: board-i2c.c:145
bool sensor_common_read_reg(uint8_t addr, uint8_t *buf, uint8_t len)
Reads a sensor&#39;s register over I2C.
Definition: sensor-common.c:48
Header file for the Sensortag Common sensor utilities.
bool sensor_common_write_reg(uint8_t addr, uint8_t *buf, uint8_t len)
Write to a sensor&#39;s register over I2C.
Definition: sensor-common.c:54