/* * Copyright (c) 2015-2016, Freescale Semiconductor, Inc. * Copyright 2016-2017 NXP * All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ /** * @file mpl3115_normal_interrupt.c * @brief The mpl3115_normal_interrupt.c file implements the ISSDK MPL3115 sensor driver * example demonstration with interrupt mode. */ //----------------------------------------------------------------------- // SDK Includes //----------------------------------------------------------------------- #include "pin_mux.h" #include "clock_config.h" #include "board.h" #include "fsl_debug_console.h" //----------------------------------------------------------------------- // CMSIS Includes //----------------------------------------------------------------------- #include "Driver_I2C.h" //----------------------------------------------------------------------- // ISSDK Includes //----------------------------------------------------------------------- #include "issdk_hal.h" #include "gpio_driver.h" #include "mpl3115_drv.h" //----------------------------------------------------------------------- // Macros //----------------------------------------------------------------------- #define MPL3115_DATA_SIZE (5) /* 3 byte Pressure/Altitude and 2 byte Temperature. */ /*! In MPL3115 the Auto Acquisition Time Step (ODR) can be set only in powers of 2 (i.e. 2^x, where x is the * SAMPLING_EXPONENT). * This gives a range of 1 second to 2^15 seconds (9 hours). */ #define MPL3115_SAMPLING_EXPONENT (1) /* 2 seconds */ //----------------------------------------------------------------------- // Constants //----------------------------------------------------------------------- /*! @brief Register settings for Interrupt (non buffered) mode. */ const registerwritelist_t cMpl3115ConfigNormal[] = { /* Enable Data Ready and Event flags for Pressure, Temperature or either. */ {MPL3115_PT_DATA_CFG, MPL3115_PT_DATA_CFG_TDEFE_ENABLED | MPL3115_PT_DATA_CFG_PDEFE_ENABLED | MPL3115_PT_DATA_CFG_DREM_ENABLED, MPL3115_PT_DATA_CFG_TDEFE_MASK | MPL3115_PT_DATA_CFG_PDEFE_MASK | MPL3115_PT_DATA_CFG_DREM_MASK}, /* Set Over Sampling Ratio to 128. */ {MPL3115_CTRL_REG1, MPL3115_CTRL_REG1_OS_OSR_128, MPL3115_CTRL_REG1_OS_MASK}, /* Set Auto acquisition time step. */ {MPL3115_CTRL_REG2, MPL3115_SAMPLING_EXPONENT, MPL3115_CTRL_REG2_ST_MASK}, /* Set INT1 Active High. */ {MPL3115_CTRL_REG3, MPL3115_CTRL_REG3_IPOL1_HIGH, MPL3115_CTRL_REG3_IPOL1_MASK}, /* Enable Interrupts for Data Ready Events. */ {MPL3115_CTRL_REG4, MPL3115_CTRL_REG4_INT_EN_DRDY_INTENABLED, MPL3115_CTRL_REG4_INT_EN_DRDY_MASK}, /* Route Interrupt to INT1. */ {MPL3115_CTRL_REG5, MPL3115_CTRL_REG5_INT_CFG_DRDY_INT1, MPL3115_CTRL_REG5_INT_CFG_DRDY_MASK}, __END_WRITE_DATA__}; /*! @brief Address and size of Raw Pressure+Temperature Data in Normal Mode. */ const registerreadlist_t cMpl3115OutputNormal[] = {{.readFrom = MPL3115_OUT_P_MSB, .numBytes = MPL3115_DATA_SIZE}, __END_READ_DATA__}; //----------------------------------------------------------------------- // Global Variables //----------------------------------------------------------------------- volatile uint8_t gMpl3115DataReady; //----------------------------------------------------------------------- // Functions //----------------------------------------------------------------------- /*! ----------------------------------------------------------------------- * @brief This is the Sensor Data Ready ISR implementation. * @details This function sets the flag which indicates if a new sample(s) is available for reading. * @param[in] pUserData This is a void pointer to the instance of the user specific data structure for the ISR. * @return void There is no return value. * @constraints None * @reeentrant Yes * -----------------------------------------------------------------------*/ void mpl3115_int_data_ready_callback(void *pUserData) { /*! @brief Set flag to indicate Sensor has signalled data ready. */ gMpl3115DataReady = true; } /*! ----------------------------------------------------------------------- * @brief This is the The main function implementation. * @details This function invokes board initializes routines, then then brings up the sensor and * finally enters an endless loop to continuously read available samples. * @param[in] void This is no input parameter. * @return void There is no return value. * @constraints None * @reeentrant No * -----------------------------------------------------------------------*/ int main(void) { int16_t tempInDegrees; uint32_t pressureInPascals; int32_t status; uint8_t data[MPL3115_DATA_SIZE]; mpl3115_pressuredata_t rawData; ARM_DRIVER_I2C *I2Cdrv = &I2C_S_DRIVER; // Now using the shield.h value!!! mpl3115_i2c_sensorhandle_t mpl3115Driver; GENERIC_DRIVER_GPIO *pGpioDriver = &Driver_GPIO_KSDK; /*! Initialize the MCU hardware. */ BOARD_InitPins(); BOARD_BootClockRUN(); BOARD_InitDebugConsole(); PRINTF("\r\n ISSDK MPL3115 sensor driver example demonstration with interrupt mode.\r\n"); /*! Initialize MAG3110 pin used by FRDM board */ pGpioDriver->pin_init(&MPL3115_INT1, GPIO_DIRECTION_IN, NULL, &mpl3115_int_data_ready_callback, NULL); /*! Initialize RGB LED pin used by FRDM board */ pGpioDriver->pin_init(&GREEN_LED, GPIO_DIRECTION_OUT, NULL, NULL, NULL); /*! Initialize the I2C driver. */ status = I2Cdrv->Initialize(I2C_S_SIGNAL_EVENT); if (ARM_DRIVER_OK != status) { PRINTF("\r\n I2C Initialization Failed\r\n"); return -1; } /*! Set the I2C Power mode. */ status = I2Cdrv->PowerControl(ARM_POWER_FULL); if (ARM_DRIVER_OK != status) { PRINTF("\r\n I2C Power Mode setting Failed\r\n"); return -1; } /*! Set the I2C bus speed. */ status = I2Cdrv->Control(ARM_I2C_BUS_SPEED, ARM_I2C_BUS_SPEED_FAST); if (ARM_DRIVER_OK != status) { PRINTF("\r\n I2C Control Mode setting Failed\r\n"); return -1; } /*! Initialize MPL3115 sensor driver. */ status = MPL3115_I2C_Initialize(&mpl3115Driver, &I2C_S_DRIVER, I2C_S_DEVICE_INDEX, MPL3115_I2C_ADDR, MPL3115_WHOAMI_VALUE); if (SENSOR_ERROR_NONE != status) { PRINTF("\r\n Sensor Initialization Failed\r\n"); return -1; } PRINTF("\r\n Successfully Initiliazed Sensor\r\n"); /*! Set the task to be executed while waiting for I2C transactions to complete. */ MPL3115_I2C_SetIdleTask(&mpl3115Driver, (registeridlefunction_t)SMC_SetPowerModeVlpr, SMC); gMpl3115DataReady = false; /*! Configure the MAG3110 sensor driver. */ status = MPL3115_I2C_Configure(&mpl3115Driver, cMpl3115ConfigNormal); if (SENSOR_ERROR_NONE != status) { PRINTF("\r\nMPL3115 configuration failed...\r\n"); return -1; } PRINTF("\r\n Successfully Applied MPL3115 Sensor Configuration\r\n"); for (;;) /* Forever loop */ { /* In ISR Mode we do not need to check Data Ready Register. * The receipt of interrupt will indicate data is ready. */ if (false == gMpl3115DataReady) { /* Loop, if new sample is not available. */ SMC_SetPowerModeWait(SMC); continue; } else { /*! Clear the data ready flag, it will be set again by the ISR. */ gMpl3115DataReady = false; pGpioDriver->toggle_pin(&GREEN_LED); } /*! Read new raw sensor data from the MPL3115. */ status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115OutputNormal, data); if (ARM_DRIVER_OK != status) { PRINTF("\r\n Read Failed. \r\n"); return -1; } /*! Process the sample and convert the raw sensor data to signed 16-bit container. */ rawData.pressure = (uint32_t)((data[0]) << 16) | ((data[1]) << 8) | ((data[2])); pressureInPascals = rawData.pressure / MPL3115_PRESSURE_CONV_FACTOR; rawData.temperature = (int16_t)((data[3]) << 8) | (data[4]); tempInDegrees = rawData.temperature / MPL3115_TEMPERATURE_CONV_FACTOR; /* NOTE: PRINTF is relatively expensive in terms of CPU time, specially when used with-in execution loop. */ PRINTF("\r\nPressure = %d Pa\r\n", pressureInPascals); PRINTF("\r\nTemperature = %d degC\r\n", tempInDegrees); ASK_USER_TO_RESUME(8); /* Ask for user input after processing 8 samples. */ } }