1 /*
2 * Copyright (c) 2015-2016, Freescale Semiconductor, Inc.
3 * Copyright 2016-2017 NXP
4 * All rights reserved.
5 *
6 * SPDX-License-Identifier: BSD-3-Clause
7 */
8
9 /**
10 * @file mpl3115_altitude.c
11 * @brief The mpl3115_altitude.c file implements the ISSDK MPL3115 sensor driver
12 * example demonstration for Altitude mode.
13 */
14
15 //-----------------------------------------------------------------------
16 // SDK Includes
17 //-----------------------------------------------------------------------
18 #include "pin_mux.h"
19 #include "clock_config.h"
20 #include "board.h"
21 #include "fsl_debug_console.h"
22
23 //-----------------------------------------------------------------------
24 // CMSIS Includes
25 //-----------------------------------------------------------------------
26 #include "Driver_I2C.h"
27
28 /* ISSDK Includes */
29 #include "issdk_hal.h"
30 #include "mpl3115_drv.h"
31
32 //-----------------------------------------------------------------------
33 // Macros
34 //-----------------------------------------------------------------------
35 #define MPL3115_DATA_SIZE (5) /* 3 byte Pressure/Altitude and 2 byte Temperature. */
36 /*! In MPL3115 the Auto Acquisition Time Step (ODR) can be set only in powers of 2 (i.e. 2^x, where x is the
37 * SAMPLING_EXPONENT).
38 * This gives a range of 1 second to 2^15 seconds (9 hours). */
39 #define MPL3115_SAMPLING_EXPONENT (1) /* 2 seconds */
40
41 //-----------------------------------------------------------------------
42 // Constants
43 //-----------------------------------------------------------------------
44 /*! @brief Register settings for Altitude readings in Normal (non buffered) mode. */
45 const registerwritelist_t cMpl3115ConfigAltitude[] = {
46 /* Enable Data Ready and Event flags for Altitude, Temperature or either. */
47 {MPL3115_PT_DATA_CFG,
48 MPL3115_PT_DATA_CFG_TDEFE_ENABLED | MPL3115_PT_DATA_CFG_PDEFE_ENABLED | MPL3115_PT_DATA_CFG_DREM_ENABLED,
49 MPL3115_PT_DATA_CFG_TDEFE_MASK | MPL3115_PT_DATA_CFG_PDEFE_MASK | MPL3115_PT_DATA_CFG_DREM_MASK},
50 /* Enable Altitude output and set Over Sampling Ratio to 128. */
51 {MPL3115_CTRL_REG1, MPL3115_CTRL_REG1_ALT_ALT | MPL3115_CTRL_REG1_OS_OSR_128,
52 MPL3115_CTRL_REG1_ALT_MASK | MPL3115_CTRL_REG1_OS_MASK},
53 /* Set Auto acquisition time step. */
54 {MPL3115_CTRL_REG2, MPL3115_SAMPLING_EXPONENT, MPL3115_CTRL_REG2_ST_MASK},
55 __END_WRITE_DATA__};
56
57 /*! @brief Address of Status Register. */
58 const registerreadlist_t cMpl3115Status[] = {{.readFrom = MPL3115_STATUS, .numBytes = 1}, __END_READ_DATA__};
59
60 /*! @brief Address and size of Raw Altitude+Temperature Data in Normal Mode. */
61 const registerreadlist_t cMpl3115OutputNormal[] = {{.readFrom = MPL3115_OUT_P_MSB, .numBytes = MPL3115_DATA_SIZE},
62 __END_READ_DATA__};
63
64 //-----------------------------------------------------------------------
65 // Functions
66 //-----------------------------------------------------------------------
67 /*!
68 * @brief Main function
69 */
main(void)70 int main(void)
71 {
72 int16_t tempInDegrees;
73 int32_t altitudeInMeters;
74 int32_t status;
75 uint8_t dataReady;
76 uint8_t data[MPL3115_DATA_SIZE];
77 mpl3115_altitudedata_t rawData;
78
79 ARM_DRIVER_I2C *I2Cdrv = &I2C_S_DRIVER; // Now using the shield.h value!!!
80 mpl3115_i2c_sensorhandle_t mpl3115Driver;
81
82 BOARD_InitPins();
83 BOARD_BootClockRUN();
84 BOARD_InitDebugConsole();
85
86 PRINTF("\r\n ISSDK MPL3115 sensor driver example demonstration with poll mode\r\n");
87
88 /*! Initialize the I2C driver. */
89 status = I2Cdrv->Initialize(I2C_S_SIGNAL_EVENT);
90 if (ARM_DRIVER_OK != status)
91 {
92 PRINTF("\r\n I2C Initialization Failed\r\n");
93 return -1;
94 }
95
96 /*! Set the I2C Power mode. */
97 status = I2Cdrv->PowerControl(ARM_POWER_FULL);
98 if (ARM_DRIVER_OK != status)
99 {
100 PRINTF("\r\n I2C Power Mode setting Failed\r\n");
101 return -1;
102 }
103
104 /*! Set the I2C bus speed. */
105 status = I2Cdrv->Control(ARM_I2C_BUS_SPEED, ARM_I2C_BUS_SPEED_FAST);
106 if (ARM_DRIVER_OK != status)
107 {
108 PRINTF("\r\n I2C Control Mode setting Failed\r\n");
109 return -1;
110 }
111
112 /*! Initialize MPL3115 sensor driver. */
113 status = MPL3115_I2C_Initialize(&mpl3115Driver, &I2C_S_DRIVER, I2C_S_DEVICE_INDEX, MPL3115_I2C_ADDR,
114 MPL3115_WHOAMI_VALUE);
115 if (SENSOR_ERROR_NONE != status)
116 {
117 PRINTF("\r\n Sensor Initialization Failed\r\n");
118 return -1;
119 }
120 PRINTF("\r\n Successfully Initiliazed Sensor\r\n");
121
122 /*! Set the task to be executed while waiting for I2C transactions to complete. */
123 MPL3115_I2C_SetIdleTask(&mpl3115Driver, (registeridlefunction_t)SMC_SetPowerModeVlpr, SMC);
124
125 /*! Configure the MPL3115 sensor. */
126 status = MPL3115_I2C_Configure(&mpl3115Driver, cMpl3115ConfigAltitude);
127 if (SENSOR_ERROR_NONE != status)
128 {
129 PRINTF("\r\nMPL3115 configuration failed...\r\n");
130 return -1;
131 }
132 PRINTF("\r\n Successfully Applied MPL3115 Sensor Configuration\r\n");
133
134 for (;;) /* Forever loop */
135 {
136 /*! Wait for data ready from the MPL3115. */
137 status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115Status, &dataReady);
138 if (0 == (dataReady & MPL3115_DR_STATUS_PTDR_MASK))
139 { /* Loop, if new sample is not available. */
140 continue;
141 }
142
143 /*! Read new raw sensor data from the MPL3115. */
144 status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115OutputNormal, data);
145 if (ARM_DRIVER_OK != status)
146 {
147 PRINTF("\r\n Read Failed. \r\n");
148 return -1;
149 }
150
151 /*! Process the sample and convert the raw sensor data. */
152 rawData.altitude = (int32_t)((data[0]) << 24) | ((data[1]) << 16) | ((data[2]) << 8);
153 altitudeInMeters = rawData.altitude / MPL3115_ALTITUDE_CONV_FACTOR;
154
155 rawData.temperature = (int16_t)((data[3]) << 8) | (data[4]);
156 tempInDegrees = rawData.temperature / MPL3115_TEMPERATURE_CONV_FACTOR;
157
158 PRINTF("\r\nAltitude = %d Meters\r\n", altitudeInMeters);
159 PRINTF("\r\nTemperature = %d degC\r\n", tempInDegrees);
160 ASK_USER_TO_RESUME(8); /* Ask for user input after processing 8 samples. */
161 }
162 }
163
