1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdint.h>
#include <stdbool.h>
#include "board.h"
#include "i2c_xfer.h"
#include "mpl3115.h"
/*FUNCTION****************************************************************
*
* Function Name : MPL3115_Init
* Returned Value : result
* Comments : Initialize MPL3115 pressure and temperature sensor.
*
*END*********************************************************************/
bool MPL3115_Init(mpl_handle_t *handle, const mpl3115_init_t *mpl3115_config)
{
uint8_t regVal;
/* Place the MPL3115 in Standby */
if (!MPL3115_WriteReg(handle, MPL3115_CTRL_REG1, 0x00))
return false;
// Set CTRL_REG1 according to mpl3115 init struct and switch it
// to active mode.
regVal = ((uint8_t)mpl3115_config->outputFormat |
(uint8_t)mpl3115_config->outputMode |
(uint8_t)mpl3115_config->oversampleRatio);
if (!MPL3115_WriteReg(handle, MPL3115_CTRL_REG1, regVal))
return false;
return true;
}
/*FUNCTION****************************************************************
*
* Function Name : MPL3115_Deinit
* Returned Value : result
* Comments : Deinit the mpl3115 sensor.
*
*END*********************************************************************/
bool MPL3115_Deinit(mpl_handle_t *handle)
{
// Switch mpl3115 to STANDBY mode.
if (!MPL3115_WriteReg(handle, MPL3115_CTRL_REG1, 0x00))
return false;
// Reset all Register content.
if (!MPL3115_WriteReg(handle, MPL3115_CTRL_REG1, 0x04))
return false;
return true;
}
/*FUNCTION****************************************************************
*
* Function Name : MPL3115_Enable
* Returned Value : result
* Comments : Enable the MPL3115 sensor.
*
*END*********************************************************************/
bool MPL3115_Enable(mpl_handle_t *handle)
{
uint8_t regVal;
if (!MPL3115_ReadReg(handle, MPL3115_CTRL_REG1, ®Val))
return false;
/* Active MPL3115 */
regVal |= 0x01;
if (!MPL3115_WriteReg(handle, MPL3115_CTRL_REG1, regVal))
return false;
return true;
}
/*FUNCTION****************************************************************
*
* Function Name : MPL3115_Disable
* Returned Value : result
* Comments : Disable the MPL3115 sensor.
*
*END*********************************************************************/
bool MPL3115_Disable(mpl_handle_t *handle)
{
uint8_t regVal;
if (!MPL3115_ReadReg(handle, MPL3115_CTRL_REG1, ®Val))
return false;
/* De-active MPL3115 */
regVal &= ~0x01;
if (!MPL3115_WriteReg(handle, MPL3115_CTRL_REG1, regVal))
return false;
return true;
}
/*FUNCTION****************************************************************
*
* Function Name : MPL3115_WriteReg
* Returned Value : result
* Comments : Write to MPL3115 single register.
*
*END*********************************************************************/
bool MPL3115_WriteReg(mpl_handle_t *handle, uint8_t regAddr, uint8_t regVal)
{
uint8_t cmdBuffer[2];
cmdBuffer[0] = MPL3115_ADDRESS << 1;
cmdBuffer[1] = regAddr;
return I2C_XFER_SendDataBlocking(handle->device, cmdBuffer, 2, ®Val, 1);
}
/*FUNCTION****************************************************************
*
* Function Name : MPL3115_ReadReg
* Returned Value : result
* Comments : Read from MPL3115 single register.
*
*END*********************************************************************/
bool MPL3115_ReadReg(mpl_handle_t *handle, uint8_t regAddr, uint8_t *regValPtr)
{
uint8_t cmdBuffer[3];
cmdBuffer[0] = MPL3115_ADDRESS << 1;
cmdBuffer[1] = regAddr;
cmdBuffer[2] = (MPL3115_ADDRESS << 1) + 1;
return I2C_XFER_ReceiveDataBlocking(handle->device, cmdBuffer, 3, regValPtr, 1);
}
/*FUNCTION****************************************************************
*
* Function Name : MPL3115_ReadData
* Returned Value : result
* Comments : Get current height and temperature from mpl3115.
*
*END*********************************************************************/
bool MPL3115_ReadData(mpl_handle_t *handle, mpl3115_data_t *val)
{
uint8_t rxBuffer[5];
uint8_t cmdBuffer[3];
cmdBuffer[0] = MPL3115_ADDRESS << 1;
cmdBuffer[1] = MPL3115_OUT_P_MSB;
cmdBuffer[2] = (MPL3115_ADDRESS << 1) + 1;
if (!I2C_XFER_ReceiveDataBlocking(handle->device, cmdBuffer, 3, rxBuffer, 5))
return false;
// place the read buffer into the 32 bit pressure/altitude and 16 bit temperature.
val->presData = (rxBuffer[0] << 24) | (rxBuffer[1] << 16) | (rxBuffer[2] << 8);
val->tempData = (rxBuffer[3] << 8) | rxBuffer[4];
return true;
}
/*******************************************************************************
* EOF
******************************************************************************/
|
