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_fifo.c
11 * @brief The mpl3115_fifo.c file implements the ISSDK MPL3115 sensor driver
12 * example demonstration with polling 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 FIFO_WMRK_SIZE (8) /* Buffer 8 Samples. */
36 #define MPL3115_DATA_SIZE (5) /* 3 byte Pressure/Altitude and 2 byte Temperature. */
37 /*! In MPL3115 the Auto Acquisition Time Step (ODR) can be set only in powers of 2 (i.e. 2^x, where x is the
38 * SAMPLING_EXPONENT).
39 * This gives a range of 1 second to 2^15 seconds (9 hours). */
40 #define MPL3115_SAMPLING_EXPONENT (0) /* 1 second. */
41
42 //-----------------------------------------------------------------------
43 // Constants
44 //-----------------------------------------------------------------------
45 /*! @brief Register settings for FIFO (buffered) mode @ default 1 sample per second. */
46 const registerwritelist_t cMpl3115ConfigFIFO[] = {
47 /* Set FIFO Mode and set FIFO Watermark Level. */
48 {MPL3115_F_SETUP, MPL3115_F_SETUP_F_MODE_STOP_MODE | FIFO_WMRK_SIZE,
49 MPL3115_F_SETUP_F_MODE_MASK | MPL3115_F_SETUP_F_WMRK_MASK},
50 /* Enable Data Ready and Event flags for Pressure, Temperature or either. */
51 {MPL3115_PT_DATA_CFG,
52 MPL3115_PT_DATA_CFG_TDEFE_ENABLED | MPL3115_PT_DATA_CFG_PDEFE_ENABLED | MPL3115_PT_DATA_CFG_DREM_ENABLED,
53 MPL3115_PT_DATA_CFG_TDEFE_MASK | MPL3115_PT_DATA_CFG_PDEFE_MASK | MPL3115_PT_DATA_CFG_DREM_MASK},
54 /* Set Over Sampling Ratio to 128. */
55 {MPL3115_CTRL_REG1, MPL3115_CTRL_REG1_OS_OSR_128, MPL3115_CTRL_REG1_OS_MASK},
56 {MPL3115_CTRL_REG2, MPL3115_SAMPLING_EXPONENT, MPL3115_CTRL_REG2_ST_MASK},
57 __END_WRITE_DATA__};
58
59 /*! @brief Address of Status Register. */
60 const registerreadlist_t cMpl3115Status[] = {{.readFrom = MPL3115_STATUS, .numBytes = 1}, __END_READ_DATA__};
61
62 /*! @brief Address and size of Pressure+Temperature Data in FIFO Mode. */
63 const registerreadlist_t cMpl3115OutputFIFO[] = {
64 {.readFrom = MPL3115_OUT_P_MSB, .numBytes = MPL3115_DATA_SIZE * FIFO_WMRK_SIZE}, __END_READ_DATA__};
65
66 //-----------------------------------------------------------------------
67 // Functions
68 //-----------------------------------------------------------------------
69 /*!
70 * @brief Main function
71 */
main(void)72 int main(void)
73 {
74 int16_t tempInDegrees;
75 uint32_t pressureInPascals;
76 int32_t status;
77 uint8_t dataReady;
78 uint8_t data[MPL3115_DATA_SIZE * FIFO_WMRK_SIZE];
79 mpl3115_pressuredata_t rawData;
80
81 ARM_DRIVER_I2C *I2Cdrv = &I2C_S_DRIVER; // Now using the shield.h value!!!
82 mpl3115_i2c_sensorhandle_t mpl3115Driver;
83
84 BOARD_InitPins();
85 BOARD_BootClockRUN();
86 BOARD_InitDebugConsole();
87
88 PRINTF("\r\n ISSDK MPL3115 sensor driver example demonstration with fifo mode\r\n");
89
90 /*! Initialize the I2C driver. */
91 status = I2Cdrv->Initialize(I2C_S_SIGNAL_EVENT);
92 if (ARM_DRIVER_OK != status)
93 {
94 PRINTF("\r\n I2C Initialization Failed\r\n");
95 return -1;
96 }
97
98 /*! Set the I2C Power mode. */
99 status = I2Cdrv->PowerControl(ARM_POWER_FULL);
100 if (ARM_DRIVER_OK != status)
101 {
102 PRINTF("\r\n I2C Power Mode setting Failed\r\n");
103 return -1;
104 }
105
106 /*! Set the I2C bus speed. */
107 status = I2Cdrv->Control(ARM_I2C_BUS_SPEED, ARM_I2C_BUS_SPEED_FAST);
108 if (ARM_DRIVER_OK != status)
109 {
110 PRINTF("\r\n I2C Control Mode setting Failed\r\n");
111 return -1;
112 }
113
114 /*! Initialize MPL3115 sensor driver. */
115 status = MPL3115_I2C_Initialize(&mpl3115Driver, &I2C_S_DRIVER, I2C_S_DEVICE_INDEX, MPL3115_I2C_ADDR,
116 MPL3115_WHOAMI_VALUE);
117 if (SENSOR_ERROR_NONE != status)
118 {
119 PRINTF("\r\n Sensor Initialization Failed\r\n");
120 return -1;
121 }
122 PRINTF("\r\n Successfully Initiliazed Sensor\r\n");
123
124 /*! Set the task to be executed while waiting for I2C transactions to complete. */
125 MPL3115_I2C_SetIdleTask(&mpl3115Driver, (registeridlefunction_t)SMC_SetPowerModeVlpr, SMC);
126
127 /*! Configure the MPL3115 sensor. */
128 status = MPL3115_I2C_Configure(&mpl3115Driver, cMpl3115ConfigFIFO);
129 if (SENSOR_ERROR_NONE != status)
130 {
131 PRINTF("\r\nMPL3115 configuration failed...\r\n");
132 return -1;
133 }
134 PRINTF("\r\n Successfully Applied MPL3115 Sensor Configuration\r\n");
135
136 for (;;) /* Forever loop */
137 {
138 /*! Wait for data ready from the MPL3115. */
139 status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115Status, &dataReady);
140 if (0 == (dataReady & MPL3115_F_STATUS_F_WMKF_FLAG_MASK))
141 { /* Loop, if new sample is not available. */
142 continue;
143 }
144
145 /*! Read new raw sensor data from the MPL3115. */
146 status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115OutputFIFO, data);
147 if (ARM_DRIVER_OK != status)
148 {
149 PRINTF("\r\n Read Failed. \r\n");
150 return -1;
151 }
152
153 /* Reset Counters */
154 pressureInPascals = 0;
155 tempInDegrees = 0;
156
157 for (uint8_t i = 0; i < FIFO_WMRK_SIZE; i++)
158 { /*! Process all samples and convert the raw sensor data. */
159 rawData.pressure = (uint32_t)((data[i * MPL3115_DATA_SIZE + 0]) << 16) |
160 ((data[i * MPL3115_DATA_SIZE + 1]) << 8) | ((data[i * MPL3115_DATA_SIZE + 2]));
161 pressureInPascals += rawData.pressure / MPL3115_PRESSURE_CONV_FACTOR;
162
163 rawData.temperature = (int16_t)((data[i * MPL3115_DATA_SIZE + 3]) << 8) | (data[i * MPL3115_DATA_SIZE + 4]);
164 tempInDegrees += rawData.temperature / MPL3115_TEMPERATURE_CONV_FACTOR;
165 }
166 PRINTF("\r\nAverage Pressure = %d Pa\r\n", pressureInPascals / FIFO_WMRK_SIZE);
167 PRINTF("\r\nAverage Temperature = %d degC\r\n", tempInDegrees / FIFO_WMRK_SIZE);
168 ASK_USER_TO_RESUME(16 / FIFO_WMRK_SIZE); /* Ask for user input after processing 16 samples. */
169 }
170 }
171
