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_interrupt.c
11 * @brief The mpl3115_normal_interrupt.c file implements the ISSDK MPL3115 sensor driver
12 * example demonstration with interrupt 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 //-----------------------------------------------------------------------
29 // ISSDK Includes
30 //-----------------------------------------------------------------------
31 #include "issdk_hal.h"
32 #include "gpio_driver.h"
33 #include "mpl3115_drv.h"
34
35 //-----------------------------------------------------------------------
36 // Macros
37 //-----------------------------------------------------------------------
38 #define MPL3115_DATA_SIZE (5) /* 3 byte Pressure/Altitude and 2 byte Temperature. */
39 /*! In MPL3115 the Auto Acquisition Time Step (ODR) can be set only in powers of 2 (i.e. 2^x, where x is the
40 * SAMPLING_EXPONENT).
41 * This gives a range of 1 second to 2^15 seconds (9 hours). */
42 #define MPL3115_SAMPLING_EXPONENT (1) /* 2 seconds */
43
44 //-----------------------------------------------------------------------
45 // Constants
46 //-----------------------------------------------------------------------
47 /*! @brief Register settings for Interrupt (non buffered) mode. */
48 const registerwritelist_t cMpl3115ConfigNormal[] = {
49 /* Enable Data Ready and Event flags for Pressure, Temperature or either. */
50 {MPL3115_PT_DATA_CFG,
51 MPL3115_PT_DATA_CFG_TDEFE_ENABLED | MPL3115_PT_DATA_CFG_PDEFE_ENABLED | MPL3115_PT_DATA_CFG_DREM_ENABLED,
52 MPL3115_PT_DATA_CFG_TDEFE_MASK | MPL3115_PT_DATA_CFG_PDEFE_MASK | MPL3115_PT_DATA_CFG_DREM_MASK},
53 /* Set Over Sampling Ratio to 128. */
54 {MPL3115_CTRL_REG1, MPL3115_CTRL_REG1_OS_OSR_128, MPL3115_CTRL_REG1_OS_MASK},
55 /* Set Auto acquisition time step. */
56 {MPL3115_CTRL_REG2, MPL3115_SAMPLING_EXPONENT, MPL3115_CTRL_REG2_ST_MASK},
57 /* Set INT1 Active High. */
58 {MPL3115_CTRL_REG3, MPL3115_CTRL_REG3_IPOL1_HIGH, MPL3115_CTRL_REG3_IPOL1_MASK},
59 /* Enable Interrupts for Data Ready Events. */
60 {MPL3115_CTRL_REG4, MPL3115_CTRL_REG4_INT_EN_DRDY_INTENABLED, MPL3115_CTRL_REG4_INT_EN_DRDY_MASK},
61 /* Route Interrupt to INT1. */
62 {MPL3115_CTRL_REG5, MPL3115_CTRL_REG5_INT_CFG_DRDY_INT1, MPL3115_CTRL_REG5_INT_CFG_DRDY_MASK},
63 __END_WRITE_DATA__};
64
65 /*! @brief Address and size of Raw Pressure+Temperature Data in Normal Mode. */
66 const registerreadlist_t cMpl3115OutputNormal[] = {{.readFrom = MPL3115_OUT_P_MSB, .numBytes = MPL3115_DATA_SIZE},
67 __END_READ_DATA__};
68
69 //-----------------------------------------------------------------------
70 // Global Variables
71 //-----------------------------------------------------------------------
72 volatile uint8_t gMpl3115DataReady;
73
74 //-----------------------------------------------------------------------
75 // Functions
76 //-----------------------------------------------------------------------
77 /*! -----------------------------------------------------------------------
78 * @brief This is the Sensor Data Ready ISR implementation.
79 * @details This function sets the flag which indicates if a new sample(s) is available for reading.
80 * @param[in] pUserData This is a void pointer to the instance of the user specific data structure for the ISR.
81 * @return void There is no return value.
82 * @constraints None
83 * @reeentrant Yes
84 * -----------------------------------------------------------------------*/
mpl3115_int_data_ready_callback(void * pUserData)85 void mpl3115_int_data_ready_callback(void *pUserData)
86 { /*! @brief Set flag to indicate Sensor has signalled data ready. */
87 gMpl3115DataReady = true;
88 }
89
90 /*! -----------------------------------------------------------------------
91 * @brief This is the The main function implementation.
92 * @details This function invokes board initializes routines, then then brings up the sensor and
93 * finally enters an endless loop to continuously read available samples.
94 * @param[in] void This is no input parameter.
95 * @return void There is no return value.
96 * @constraints None
97 * @reeentrant No
98 * -----------------------------------------------------------------------*/
main(void)99 int main(void)
100 {
101 int16_t tempInDegrees;
102 uint32_t pressureInPascals;
103 int32_t status;
104 uint8_t data[MPL3115_DATA_SIZE];
105 mpl3115_pressuredata_t rawData;
106
107 ARM_DRIVER_I2C *I2Cdrv = &I2C_S_DRIVER; // Now using the shield.h value!!!
108 mpl3115_i2c_sensorhandle_t mpl3115Driver;
109 GENERIC_DRIVER_GPIO *pGpioDriver = &Driver_GPIO_KSDK;
110
111 /*! Initialize the MCU hardware. */
112 BOARD_InitPins();
113 BOARD_BootClockRUN();
114 BOARD_InitDebugConsole();
115
116 PRINTF("\r\n ISSDK MPL3115 sensor driver example demonstration with interrupt mode.\r\n");
117
118 /*! Initialize MAG3110 pin used by FRDM board */
119 pGpioDriver->pin_init(&MPL3115_INT1, GPIO_DIRECTION_IN, NULL, &mpl3115_int_data_ready_callback, NULL);
120
121 /*! Initialize RGB LED pin used by FRDM board */
122 pGpioDriver->pin_init(&GREEN_LED, GPIO_DIRECTION_OUT, NULL, NULL, NULL);
123
124 /*! Initialize the I2C driver. */
125 status = I2Cdrv->Initialize(I2C_S_SIGNAL_EVENT);
126 if (ARM_DRIVER_OK != status)
127 {
128 PRINTF("\r\n I2C Initialization Failed\r\n");
129 return -1;
130 }
131
132 /*! Set the I2C Power mode. */
133 status = I2Cdrv->PowerControl(ARM_POWER_FULL);
134 if (ARM_DRIVER_OK != status)
135 {
136 PRINTF("\r\n I2C Power Mode setting Failed\r\n");
137 return -1;
138 }
139
140 /*! Set the I2C bus speed. */
141 status = I2Cdrv->Control(ARM_I2C_BUS_SPEED, ARM_I2C_BUS_SPEED_FAST);
142 if (ARM_DRIVER_OK != status)
143 {
144 PRINTF("\r\n I2C Control Mode setting Failed\r\n");
145 return -1;
146 }
147
148 /*! Initialize MPL3115 sensor driver. */
149 status = MPL3115_I2C_Initialize(&mpl3115Driver, &I2C_S_DRIVER, I2C_S_DEVICE_INDEX, MPL3115_I2C_ADDR,
150 MPL3115_WHOAMI_VALUE);
151 if (SENSOR_ERROR_NONE != status)
152 {
153 PRINTF("\r\n Sensor Initialization Failed\r\n");
154 return -1;
155 }
156 PRINTF("\r\n Successfully Initiliazed Sensor\r\n");
157
158 /*! Set the task to be executed while waiting for I2C transactions to complete. */
159 MPL3115_I2C_SetIdleTask(&mpl3115Driver, (registeridlefunction_t)SMC_SetPowerModeVlpr, SMC);
160
161 gMpl3115DataReady = false;
162
163 /*! Configure the MAG3110 sensor driver. */
164 status = MPL3115_I2C_Configure(&mpl3115Driver, cMpl3115ConfigNormal);
165 if (SENSOR_ERROR_NONE != status)
166 {
167 PRINTF("\r\nMPL3115 configuration failed...\r\n");
168 return -1;
169 }
170 PRINTF("\r\n Successfully Applied MPL3115 Sensor Configuration\r\n");
171
172 for (;;) /* Forever loop */
173 { /* In ISR Mode we do not need to check Data Ready Register.
174 * The receipt of interrupt will indicate data is ready. */
175 if (false == gMpl3115DataReady)
176 { /* Loop, if new sample is not available. */
177 SMC_SetPowerModeWait(SMC);
178 continue;
179 }
180 else
181 { /*! Clear the data ready flag, it will be set again by the ISR. */
182 gMpl3115DataReady = false;
183 pGpioDriver->toggle_pin(&GREEN_LED);
184 }
185
186 /*! Read new raw sensor data from the MPL3115. */
187 status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115OutputNormal, data);
188 if (ARM_DRIVER_OK != status)
189 {
190 PRINTF("\r\n Read Failed. \r\n");
191 return -1;
192 }
193
194 /*! Process the sample and convert the raw sensor data to signed 16-bit container. */
195 rawData.pressure = (uint32_t)((data[0]) << 16) | ((data[1]) << 8) | ((data[2]));
196 pressureInPascals = rawData.pressure / MPL3115_PRESSURE_CONV_FACTOR;
197
198 rawData.temperature = (int16_t)((data[3]) << 8) | (data[4]);
199 tempInDegrees = rawData.temperature / MPL3115_TEMPERATURE_CONV_FACTOR;
200
201 /* NOTE: PRINTF is relatively expensive in terms of CPU time, specially when used with-in execution loop. */
202 PRINTF("\r\nPressure = %d Pa\r\n", pressureInPascals);
203 PRINTF("\r\nTemperature = %d degC\r\n", tempInDegrees);
204 ASK_USER_TO_RESUME(8); /* Ask for user input after processing 8 samples. */
205 }
206 }
207
