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_normal.c
11 * @brief The mpl3115_normal.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 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 Normal (non buffered) mode. */
45 const registerwritelist_t cMpl3115ConfigNormal[] = {
46 /* Enable Data Ready and Event flags for Pressure, 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 /* Set Over Sampling Ratio to 128. */
51 {MPL3115_CTRL_REG1, MPL3115_CTRL_REG1_OS_OSR_128, MPL3115_CTRL_REG1_OS_MASK},
52 /* Set Auto acquisition time step. */
53 {MPL3115_CTRL_REG2, MPL3115_SAMPLING_EXPONENT, MPL3115_CTRL_REG2_ST_MASK},
54 __END_WRITE_DATA__};
55
56 /*! @brief Address of Status Register. */
57 const registerreadlist_t cMpl3115Status[] = {{.readFrom = MPL3115_STATUS, .numBytes = 1}, __END_READ_DATA__};
58
59 /*! @brief Address and size of Raw Pressure+Temperature Data in Normal Mode. */
60 const registerreadlist_t cMpl3115OutputNormal[] = {{.readFrom = MPL3115_OUT_P_MSB, .numBytes = MPL3115_DATA_SIZE},
61 __END_READ_DATA__};
62
63 //-----------------------------------------------------------------------
64 // Functions
65 //-----------------------------------------------------------------------
66 /*!
67 * @brief Main function
68 */
main(void)69 int main(void)
70 {
71 int16_t tempInDegrees;
72 uint32_t pressureInPascals;
73 int32_t status;
74 uint8_t dataReady;
75 uint8_t data[MPL3115_DATA_SIZE];
76 mpl3115_pressuredata_t rawData;
77
78 ARM_DRIVER_I2C *I2Cdrv = &I2C_S_DRIVER; // Now using the shield.h value!!!
79 mpl3115_i2c_sensorhandle_t mpl3115Driver;
80
81 BOARD_InitPins();
82 BOARD_BootClockRUN();
83 BOARD_InitDebugConsole();
84
85 PRINTF("\r\n ISSDK MPL3115 sensor driver example demonstration with poll mode\r\n");
86
87 /*! Initialize the I2C driver. */
88 status = I2Cdrv->Initialize(I2C_S_SIGNAL_EVENT);
89 if (ARM_DRIVER_OK != status)
90 {
91 PRINTF("\r\n I2C Initialization Failed\r\n");
92 return -1;
93 }
94
95 /*! Set the I2C Power mode. */
96 status = I2Cdrv->PowerControl(ARM_POWER_FULL);
97 if (ARM_DRIVER_OK != status)
98 {
99 PRINTF("\r\n I2C Power Mode setting Failed\r\n");
100 return -1;
101 }
102
103 /*! Set the I2C bus speed. */
104 status = I2Cdrv->Control(ARM_I2C_BUS_SPEED, ARM_I2C_BUS_SPEED_FAST);
105 if (ARM_DRIVER_OK != status)
106 {
107 PRINTF("\r\n I2C Control Mode setting Failed\r\n");
108 return -1;
109 }
110
111 /*! Initialize MPL3115 sensor driver. */
112 status = MPL3115_I2C_Initialize(&mpl3115Driver, &I2C_S_DRIVER, I2C_S_DEVICE_INDEX, MPL3115_I2C_ADDR,
113 MPL3115_WHOAMI_VALUE);
114 if (SENSOR_ERROR_NONE != status)
115 {
116 PRINTF("\r\n Sensor Initialization Failed\r\n");
117 return -1;
118 }
119 PRINTF("\r\n Successfully Initiliazed Sensor\r\n");
120
121 /*! Set the task to be executed while waiting for I2C transactions to complete. */
122 MPL3115_I2C_SetIdleTask(&mpl3115Driver, (registeridlefunction_t)SMC_SetPowerModeVlpr, SMC);
123
124 /*! Configure the MPL3115 sensor. */
125 status = MPL3115_I2C_Configure(&mpl3115Driver, cMpl3115ConfigNormal);
126 if (SENSOR_ERROR_NONE != status)
127 {
128 PRINTF("\r\nMPL3115 configuration failed...\r\n");
129 return -1;
130 }
131 PRINTF("\r\n Successfully Applied MPL3115 Sensor Configuration\r\n");
132
133 for (;;) /* Forever loop */
134 {
135 /*! Wait for data ready from the MPL3115. */
136 status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115Status, &dataReady);
137 if (0 == (dataReady & MPL3115_DR_STATUS_PTDR_MASK))
138 { /* Loop, if new sample is not available. */
139 continue;
140 }
141
142 /*! Read new raw sensor data from the MPL3115. */
143 status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115OutputNormal, data);
144 if (ARM_DRIVER_OK != status)
145 {
146 PRINTF("\r\n Read Failed. \r\n");
147 return -1;
148 }
149
150 /*! Process the sample and convert the raw sensor data. */
151 rawData.pressure = (uint32_t)((data[0]) << 16) | ((data[1]) << 8) | ((data[2]));
152 pressureInPascals = rawData.pressure / MPL3115_PRESSURE_CONV_FACTOR;
153
154 rawData.temperature = (int16_t)((data[3]) << 8) | (data[4]);
155 tempInDegrees = rawData.temperature / MPL3115_TEMPERATURE_CONV_FACTOR;
156
157 PRINTF("\r\nPressure = %d Pa\r\n", pressureInPascals);
158 PRINTF("\r\nTemperature = %d degC\r\n", tempInDegrees);
159 ASK_USER_TO_RESUME(8); /* Ask for user input after processing 8 samples. */
160 }
161 }
162
