Contiki-NG
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bme280-arch.c
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1/*
2 * Copyright (c) 2015, Zolertia
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 *
14 * 3. Neither the name of the copyright holder nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31/*---------------------------------------------------------------------------*/
32/**
33 * \addtogroup zoul-bme280-sensor
34 * \ingroup zoul
35 *
36 * @{
37 *
38 * \file
39 * Architecture-specific I2C for the external BME280 weather sensor
40 *
41 * \author
42 * Antonio Lignan <alinan@zolertia.com>
43 */
44/*---------------------------------------------------------------------------*/
45#include "contiki.h"
46#include "dev/i2c.h"
47/*---------------------------------------------------------------------------*/
48void
49bme280_arch_i2c_init(void)
50{
51 i2c_init(I2C_SDA_PORT, I2C_SDA_PIN, I2C_SCL_PORT, I2C_SCL_PIN,
52 I2C_SCL_NORMAL_BUS_SPEED);
53}
54/*---------------------------------------------------------------------------*/
55void
56bme280_arch_i2c_write_mem(uint8_t addr, uint8_t reg, uint8_t value)
57{
58 uint8_t buf[2];
59
60 buf[0] = reg;
61 buf[1] = value;
62
64 i2c_burst_send(addr, buf, 2);
65}
66/*---------------------------------------------------------------------------*/
67void
68bme280_arch_i2c_read_mem(uint8_t addr, uint8_t reg, uint8_t *buf, uint8_t bytes)
69{
71 if(i2c_single_send(addr, reg) == I2C_MASTER_ERR_NONE) {
72 while(i2c_master_busy());
73 i2c_burst_receive(addr, buf, bytes);
74 }
75}
76/*---------------------------------------------------------------------------*/
77/**
78 * @}
79 */
uint8_t i2c_burst_send(uint8_t slave_addr, uint8_t *data, uint8_t len)
Perform all operations to send multiple bytes to a slave.
Definition i2c.c:188
uint8_t i2c_master_busy(void)
Return the busy state of I2C module.
Definition i2c.c:141
void i2c_init(uint8_t port_sda, uint8_t pin_sda, uint8_t port_scl, uint8_t pin_scl, uint32_t bus_speed)
Initialize the I2C peripheral and pins.
Definition i2c.c:49
void i2c_master_enable(void)
Enable master I2C module.
Definition i2c.c:91
uint8_t i2c_burst_receive(uint8_t slave_addr, uint8_t *data, uint8_t len)
Perform all operations to receive multiple bytes from a slave.
Definition i2c.c:218
uint8_t i2c_single_send(uint8_t slave_addr, uint8_t data)
Perform all operations to send a byte to a slave.
Definition i2c.c:159
Header file with declarations for the I2C Control module.
static uip_ds6_addr_t * addr
Pointer to a nbr cache entry.
Definition uip-nd6.c:107