mpl3115_demo.c

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/*
 * The Clear BSD License
 * Copyright (c) 2016, Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 * All rights reserved.
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 *   of conditions and the following disclaimer.
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 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
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/**
 * @file mpl3115_demo.c
 * @brief The mpl3115_demo.c file implements the ISSDK MPL3115 sensor
 *        demo example demonstration with One-Shot mode.
 */

//-----------------------------------------------------------------------
// SDK Includes
//-----------------------------------------------------------------------
#include "board.h"
#include "pin_mux.h"
#include "clock_config.h"

//-----------------------------------------------------------------------
// CMSIS Includes
//-----------------------------------------------------------------------
#include "Driver_I2C.h"
#include "Driver_USART.h"

//-----------------------------------------------------------------------
// ISSDK Includes
//-----------------------------------------------------------------------
#include "issdk_hal.h"
#include "gpio_driver.h"
#include "mpl3115_drv.h"
#include "host_io_uart.h"
#include "systick_utils.h"
#include "auto_detection_service.h"

//-----------------------------------------------------------------------
// Macros
//-----------------------------------------------------------------------
#define MPL3115_T_ON_MAX 1000       /* MAX Turn On Time after RST */
#define MPL3115_DATA_SIZE 5         /* 3 byte Pressure and 2 byte Temperature. */
#define MPL3115_STREAM_DATA_SIZE 10 /* 6 byte Data */
#define LED_TOGGLE_RATE 100         /* Toggle LED after every 100 samples. */

/*! @brief Unique Name for this application which should match the target GUI pkg name. */
#define APPLICATION_NAME "Digital Pressure Altimeter Demo (MPL3115)"
/*! @brief Version to distinguish between instances the same application based on target Shield and updates. */
#define APPLICATION_VERSION "2.5"

//-----------------------------------------------------------------------
// Constants
//-----------------------------------------------------------------------
/*! @brief Register settings for Interrupt (non buffered) Enablement with ONe-Shot Mode. */
const registerwritelist_t cMpl3115ConfigINT[] = {
    /* Set 100Hz OSR and Clear ALT and ACTIBE Bits. */
    {MPL3115_CTRL_REG1, MPL3115_CTRL_REG1_ALT_BAR | MPL3115_CTRL_REG1_OS_OSR_2 | MPL3115_CTRL_REG1_SBYB_STANDBY,
                        MPL3115_CTRL_REG1_ALT_MASK | MPL3115_CTRL_REG1_OS_MASK | MPL3115_CTRL_REG1_SBYB_MASK},
    /* Reset INT1 Pin state. */
    {MPL3115_CTRL_REG3, MPL3115_CTRL_REG3_IPOL1_LOW, MPL3115_CTRL_REG3_IPOL1_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},
    /* 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 the One ShoT Bit. */
    {MPL3115_CTRL_REG1, MPL3115_CTRL_REG1_OST_SET, MPL3115_CTRL_REG1_OST_MASK},
    __END_WRITE_DATA__};

/*! @brief Register settings for Triggring One-Shot Sampling. */
const registerwritelist_t cMpl3115SetOST[] = {
    /* Set the One ShoT Bit. */
    {MPL3115_CTRL_REG1, MPL3115_CTRL_REG1_OST_SET, MPL3115_CTRL_REG1_OST_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
//-----------------------------------------------------------------------
char boardString[ADS_MAX_STRING_LENGTH] = {0}, shieldString[ADS_MAX_STRING_LENGTH] = {0},
     embAppName[ADS_MAX_STRING_LENGTH] = {0};
volatile bool bStreamingEnabled = false, bMpl3115DataReady = false, bMpl3115Ready = false;
uint8_t gStreamID; /* The auto assigned Stream ID. */
int32_t gSystick;
GENERIC_DRIVER_GPIO *pGpioDriver = &Driver_GPIO_KSDK;

//-----------------------------------------------------------------------
// Functions
//-----------------------------------------------------------------------
/* This is the Sensor Data Ready ISR implementation.*/
void mpl3115_int_data_ready_callback(void *pUserData)
{ /*! @brief Set flag to indicate Sensor has signalled data ready. */
    bMpl3115DataReady = true;
}

/* Handler for Device Info and Streaming Control Commands. */
bool process_host_command(
    uint8_t tag, uint8_t *hostCommand, uint8_t *hostResponse, size_t *hostMsgSize, size_t respBufferSize)
{
    bool success = false;

    /* If it is Host requesting Device Info, send Board Name and Shield Name. */
    if (tag == HOST_PRO_INT_DEV_TAG)
    { /* Byte 1     : Payload - Length of APPLICATION_NAME (b)
       * Bytes=b    : Payload Application Name
       * Byte b+1   : Payload - Length of BOARD_NAME (s)
       * Bytes=s    : Payload Board Name
       * Byte b+s+2 : Payload - Length of SHIELD_NAME (v)
       * Bytes=v    : Payload Shield Name */

        size_t appNameLen = strlen(embAppName);
        size_t boardNameLen = strlen(boardString);
        size_t shieldNameLen = strlen(shieldString);

        if (respBufferSize >= boardNameLen + shieldNameLen + appNameLen + 3)
        { /* We have sufficient buffer. */
            *hostMsgSize = 0;
        }
        else
        {
            return false;
        }

        hostResponse[*hostMsgSize] = appNameLen;
        *hostMsgSize += 1;

        memcpy(hostResponse + *hostMsgSize, embAppName, appNameLen);
        *hostMsgSize += appNameLen;

        hostResponse[*hostMsgSize] = boardNameLen;
        *hostMsgSize += 1;

        memcpy(hostResponse + *hostMsgSize, boardString, boardNameLen);
        *hostMsgSize += boardNameLen;

        hostResponse[*hostMsgSize] = shieldNameLen;
        *hostMsgSize += 1;

        memcpy(hostResponse + *hostMsgSize, shieldString, shieldNameLen);
        *hostMsgSize += shieldNameLen;

        return true;
    }

    /* If it is Host sending Streaming Commands, take necessary actions. */
    if ((tag == (HOST_PRO_INT_CMD_TAG | HOST_PRO_CMD_W_CFG_TAG)) &&
        (*hostMsgSize == HOST_MSG_CMD_ACT_OFFSET - HOST_MSG_LEN_LSB_OFFSET))
    {                           /* Byte 1 : Payload - Operation Code (Start/Stop Operation Code)
                                 * Byte 2 : Payload - Stream ID (Target Stream for carrying out operation) */
        switch (hostCommand[0]) /* Execute desired operation (Start/Stop) on the requested Stream. */
        {
            case HOST_CMD_START:
                if (hostCommand[1] == gStreamID && bMpl3115Ready && bStreamingEnabled == false)
                {
                    BOARD_SystickStart(&gSystick);
                    bStreamingEnabled = true;
                    success = true;
                }
                break;
            case HOST_CMD_STOP:
                if (hostCommand[1] == gStreamID && bMpl3115Ready && bStreamingEnabled == true)
                {
                    pGpioDriver->clr_pin(&GREEN_LED);
                    bStreamingEnabled = false;
                    success = true;
                }
                break;
            default:
                break;
        }
        *hostMsgSize = 0; /* Zero payload in response. */
    }

    return success;
}

/*!
 * @brief Main function
 */
int main(void)
{
    int32_t status;
    uint8_t toggle_led = 0;
    uint8_t data[MPL3115_DATA_SIZE], streamingPacket[STREAMING_HEADER_LEN + MPL3115_STREAM_DATA_SIZE];

    mpl3115_i2c_sensorhandle_t mpl3115Driver;
    mpl3115_pressuredata_t rawData = {.timestamp = 0};

    ARM_DRIVER_I2C *pI2cDriver = &I2C_S_DRIVER;
    ARM_DRIVER_USART *pUartDriver = &HOST_S_DRIVER;

    /*! Initialize the MCU hardware. */
    BOARD_BootClockRUN();
    BOARD_SystickEnable();

    /* Create the Short Application Name String for ADS. */
    sprintf(embAppName, "%s:%s", APPLICATION_NAME, APPLICATION_VERSION);

    /* Run ADS. */
    BOARD_RunADS(embAppName, boardString, shieldString, ADS_MAX_STRING_LENGTH);

    /* Create the Full Application Name String for Device Info Response. */
    sprintf(embAppName, "%s:%s:%s", SHIELD_NAME, APPLICATION_NAME, APPLICATION_VERSION);

    /*! Initialize INT1 MPL3115 pin used by FRDM board */
    pGpioDriver->pin_init(&MPL3115_INT1, GPIO_DIRECTION_IN, NULL, &mpl3115_int_data_ready_callback, NULL);

    /*! Initialize GREEN LED pin used by FRDM board */
    pGpioDriver->pin_init(&GREEN_LED, GPIO_DIRECTION_OUT, NULL, NULL, NULL);

    /*! Initialize the I2C driver. */
    status = pI2cDriver->Initialize(I2C_S_SIGNAL_EVENT);
    if (ARM_DRIVER_OK != status)
    {
        return -1;
    }

    /*! Set the I2C Power mode. */
    status = pI2cDriver->PowerControl(ARM_POWER_FULL);
    if (ARM_DRIVER_OK != status)
    {
        return -1;
    }

    /*! Set the I2C bus speed. */
    status = pI2cDriver->Control(ARM_I2C_BUS_SPEED, ARM_I2C_BUS_SPEED_FAST);
    if (ARM_DRIVER_OK != status)
    {
        return -1;
    }

    /*! Initialize the UART driver. */
    status = pUartDriver->Initialize(HOST_S_SIGNAL_EVENT);
    if (ARM_DRIVER_OK != status)
    {
        return -1;
    }

    /*! Set the UART Power mode. */
    status = pUartDriver->PowerControl(ARM_POWER_FULL);
    if (ARM_DRIVER_OK != status)
    {
        return -1;
    }

    /*! Set UART Baud Rate. */
    status = pUartDriver->Control(ARM_USART_MODE_ASYNCHRONOUS, BOARD_DEBUG_UART_BAUDRATE);
    if (ARM_DRIVER_OK != status)
    {
        return -1;
    }

    /*! Initialize the 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)
    {   /*!  Set the task to be executed while waiting for I2C transactions to complete. */
        MPL3115_I2C_SetIdleTask(&mpl3115Driver, (registeridlefunction_t)SMC_SetPowerModeWait, SMC);

        /*! We do not call MPL3115_I2C_Configure() in this case as we are going to read samples on demand.
         * We explicitly only enable ISR settings. */
        status = Sensor_I2C_Write(mpl3115Driver.pCommDrv, &mpl3115Driver.deviceInfo, mpl3115Driver.slaveAddress,
                                  cMpl3115ConfigINT);
        if (ARM_DRIVER_OK == status)
        { /* Ready only if INT Configure write success. */
            bMpl3115Ready = true;
        }
    }

    /*! Initialize streaming and assign a Stream ID. */
    gStreamID =
        Host_IO_Init(pUartDriver, (void *)mpl3115Driver.pCommDrv, &mpl3115Driver.deviceInfo, NULL, MPL3115_I2C_ADDR);
    /* Confirm if a valid Stream ID has been allocated for this stream. */
    if (0 == gStreamID)
    {
        bMpl3115Ready = false;
    }
    else
    {
        /*! Populate streaming header. */
        Host_IO_Add_ISO_Header(gStreamID, streamingPacket, MPL3115_STREAM_DATA_SIZE);
        pGpioDriver->clr_pin(&GREEN_LED); /* Set LED to indicate application is ready. */
    }

    for (;;) /* Forever loop */
    {        /* Call UART Non-Blocking Receive. */
        Host_IO_Receive(process_host_command, HOST_FORMAT_HDLC);

        /* Process packets only if streaming has been enabled by Host and ODR has expired.
         * The receipt of ODR interrupt will indicate data should be ready. */
        if (false == bStreamingEnabled || false == bMpl3115DataReady)
        {
            SMC_SetPowerModeWait(SMC); /* Power save, wait if nothing to do. */
            continue;
        }
        else
        { /*! Clear the data ready flag, it will be set again by the ODR CB. */
            bMpl3115DataReady = false;
        }

        /* Trigger acquisition of the Next Sample. */
        status = Sensor_I2C_Write(mpl3115Driver.pCommDrv, &mpl3115Driver.deviceInfo, mpl3115Driver.slaveAddress,
                                  cMpl3115SetOST);
        if (ARM_DRIVER_OK != status)
        { /* Exit if OST write failed. */
            return -1;
        }

        /*! Read raw sensor data from the MPL3115. */
        status = MPL3115_I2C_ReadData(&mpl3115Driver, cMpl3115OutputNormal, data);
        if (ARM_DRIVER_OK != status)
        { /* Exit if sample read failed. */
            return -1;
        }

        /* Update timestamp from Systick framework. */
        rawData.timestamp += BOARD_SystickElapsedTime_us(&gSystick);

        /*! Convert the raw sensor data to signed 32-bit and 16-bit containers for display to the debug port. */
        rawData.pressure = (uint32_t)((data[0]) << 16) | ((data[1]) << 8) | ((data[2]));
        rawData.temperature = (int16_t)((data[3]) << 8) | (data[4]);
        rawData.pressure /= 16;
        rawData.temperature /= 16;

        /* Copy Raw samples to Streaming Buffer. */
        memcpy(streamingPacket + STREAMING_HEADER_LEN, &rawData, MPL3115_STREAM_DATA_SIZE);
        /* Send streaming packet to Host. */
        Host_IO_Send(streamingPacket, sizeof(streamingPacket), HOST_FORMAT_HDLC);
        if (toggle_led++ == LED_TOGGLE_RATE)
        { /* Toggle LED at a refresh rate that is perceivable to indicate application is active. */
            toggle_led = 0;
            pGpioDriver->toggle_pin(&GREEN_LED);
        }
    }
}