/* * Copyright (c) 2016, Freescale Semiconductor, Inc. * Copyright 2016-2017 NXP * All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ /** * @file fxpq3115_fifo_interrupt.c * @brief The fxpq3115_fifo_interrupt.c file implements the ISSDK FXPQ3115BV sensor driver * example demonstration with fifo in 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 "fxpq3115_drv.h" //----------------------------------------------------------------------- // Macros //----------------------------------------------------------------------- /* Application Configurations Selections */ #define FIFO_WMRK_SIZE (8) /* Buffer 8 Samples. */ #define FXPQ3115_DATA_SIZE (5) /* 3 byte Pressure/Altitude and 2 byte Temperature. */ /*! In FXPQ3115 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 FXPQ3115_SAMPLING_EXPONENT (0) /* 1 seconds. */ //----------------------------------------------------------------------- // Constants //----------------------------------------------------------------------- /*! @brief Register settings for FIFO (buffered) mode @ default 1 sample per second with Interrupts. */ const registerwritelist_t B3115ConfigFIFOInt[] = { /* Set FIFO Mode and set FIFO Watermark Level. */ {FXPQ3115_F_SETUP, FXPQ3115_F_SETUP_F_MODE_STOP_MODE | FIFO_WMRK_SIZE, FXPQ3115_F_SETUP_F_MODE_MASK | FXPQ3115_F_SETUP_F_WMRK_MASK}, /* Enable Data Ready and Event flags for Pressure, Temperature or either. */ {FXPQ3115_PT_DATA_CFG, FXPQ3115_PT_DATA_CFG_TDEFE_ENABLED | FXPQ3115_PT_DATA_CFG_PDEFE_ENABLED | FXPQ3115_PT_DATA_CFG_DREM_ENABLED, FXPQ3115_PT_DATA_CFG_TDEFE_MASK | FXPQ3115_PT_DATA_CFG_PDEFE_MASK | FXPQ3115_PT_DATA_CFG_DREM_MASK}, /* Set Over Sampling Ratio to 128. */ {FXPQ3115_CTRL_REG1, FXPQ3115_CTRL_REG1_OS_OSR_128, FXPQ3115_CTRL_REG1_OS_MASK}, {FXPQ3115_CTRL_REG2, FXPQ3115_SAMPLING_EXPONENT, FXPQ3115_CTRL_REG2_ST_MASK}, /* Set INT1 Active High. */ {FXPQ3115_CTRL_REG3, FXPQ3115_CTRL_REG3_IPOL1_HIGH, FXPQ3115_CTRL_REG3_IPOL1_MASK}, /* Enable Interrupts for FIFO Events. */ {FXPQ3115_CTRL_REG4, FXPQ3115_CTRL_REG4_INT_EN_FIFO_INTENABLED, FXPQ3115_CTRL_REG4_INT_EN_FIFO_MASK}, /* Route Interrupt to INT1. */ {FXPQ3115_CTRL_REG5, FXPQ3115_CTRL_REG5_INT_CFG_FIFO_INT1, FXPQ3115_CTRL_REG5_INT_CFG_FIFO_MASK}, __END_WRITE_DATA__}; /*! @brief Address of Status Register. */ const registerreadlist_t B3115Status[] = {{.readFrom = FXPQ3115_STATUS, .numBytes = 1}, __END_READ_DATA__}; /*! @brief Address and size of Pressure+Temperature Data in FIFO Mode. */ const registerreadlist_t B3115OutputFIFO[] = { {.readFrom = FXPQ3115_OUT_P_MSB, .numBytes = FXPQ3115_DATA_SIZE * FIFO_WMRK_SIZE}, __END_READ_DATA__}; //----------------------------------------------------------------------- // Global Variables //----------------------------------------------------------------------- volatile uint8_t gB3115DataReady; //----------------------------------------------------------------------- // 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 fxpq3115_int_data_ready_callback(void *pUserData) { /*! @brief Set flag to indicate Sensor has signalled data ready. */ gB3115DataReady = 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[FXPQ3115_DATA_SIZE * FIFO_WMRK_SIZE]; fxpq3115_pressuredata_t rawData; ARM_DRIVER_I2C *I2Cdrv = &I2C_S_DRIVER; // Now using the shield.h value!!! fxpq3115_i2c_sensorhandle_t fxpq3115Driver; GENERIC_DRIVER_GPIO *pGpioDriver = &Driver_GPIO_KSDK; /*! Initialize the MCU hardware. */ BOARD_InitPins(); BOARD_BootClockRUN(); BOARD_InitDebugConsole(); PRINTF("\r\n ISSDK FXPQ3115 sensor driver example demonstration with interrupt mode.\r\n"); /*! Initialize FXPQ3115 pin used by FRDM board */ pGpioDriver->pin_init(&FXPQ3115_INT1, GPIO_DIRECTION_IN, NULL, &fxpq3115_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 FXPQ3115 sensor driver. */ status = FXPQ3115_I2C_Initialize(&fxpq3115Driver, &I2C_S_DRIVER, I2C_S_DEVICE_INDEX, FXPQ3115_I2C_ADDR, FXPQ3115_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. */ FXPQ3115_I2C_SetIdleTask(&fxpq3115Driver, (registeridlefunction_t)SMC_SetPowerModeVlpr, SMC); gB3115DataReady = false; /*! Configure the FXPQ3115 sensor driver. */ status = FXPQ3115_I2C_Configure(&fxpq3115Driver, B3115ConfigFIFOInt); if (SENSOR_ERROR_NONE != status) { PRINTF("\r\n FXPQ3115 Sensor Configuration Failed, Err = %d\r\n", status); return -1; } PRINTF("\r\n Successfully Applied FXPQ3115 Sensor Configuration\r\n"); for (;;) /* Forever loop (with logic optimized for FIFO Mode). */ { /* In ISR Mode we do not need to check Data Ready Register. * The receipt of interrupt will indicate data is ready. */ if (false == gB3115DataReady) { /* 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. */ gB3115DataReady = false; pGpioDriver->toggle_pin(&GREEN_LED); /* Read FIFO status, to clear sensor's INT. * Note: This is a special step in FIFO Mode particular to FXPQ3115, where we have to read F_STATUS to clear * the sensor's internal INT. */ FXPQ3115_I2C_ReadData(&fxpq3115Driver, B3115Status, (uint8_t *)&status); } /*! Read new raw sensor data from the FXPQ3115. */ status = FXPQ3115_I2C_ReadData(&fxpq3115Driver, B3115OutputFIFO, data); if (ARM_DRIVER_OK != status) { PRINTF("\r\n Read Failed. \r\n"); return -1; } /* Reset Counters */ pressureInPascals = 0; tempInDegrees = 0; for (uint8_t i = 0; i < FIFO_WMRK_SIZE; i++) { /*! Process all samples and convert the raw sensor data. */ rawData.pressure = (uint32_t)((data[i * FXPQ3115_DATA_SIZE + 0]) << 16) | ((data[i * FXPQ3115_DATA_SIZE + 1]) << 8) | ((data[i * FXPQ3115_DATA_SIZE + 2])); pressureInPascals += rawData.pressure / FXPQ3115_PRESSURE_CONV_FACTOR; rawData.temperature = (int16_t)((data[i * FXPQ3115_DATA_SIZE + 3]) << 8) | (data[i * FXPQ3115_DATA_SIZE + 4]); tempInDegrees += rawData.temperature / FXPQ3115_TEMPERATURE_CONV_FACTOR; } /* NOTE: PRINTF is relatively expensive in terms of CPU time, specially when used with-in execution loop. */ PRINTF("\r\n Average Pressure = %d Pa\r\n", pressureInPascals / FIFO_WMRK_SIZE); PRINTF("\r\n Average Temperature = %d degC\r\n", tempInDegrees / FIFO_WMRK_SIZE); ASK_USER_TO_RESUME(16 / FIFO_WMRK_SIZE); /* Ask for user input after processing 16 samples. */ } }