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Develop on NXP Rapid IoT Prototyping kit with ARM mbed and free tools.

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pcf2123 RTC source

C/C++
pcf2123 RTC library
/*
 * Copyright (c) 2018 NXP
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
 *
 * o Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*!
 * @file
 * This is the source file for the real time clock sensor PCF2123 driver.
 */

#include "pcf2123.h"
#include <string.h>
#include <assert.h>

/* REGISTERS */
#define PCF2123_REG_CTRL1       (0x00)    /* Control Register 1 */
#define PCF2123_REG_CTRL2       (0x01)    /* Control Register 2 */
#define PCF2123_REG_SC          (0x02)    /* datetime */
#define PCF2123_REG_MN          (0x03)
#define PCF2123_REG_HR          (0x04)
#define PCF2123_REG_DM          (0x05)
#define PCF2123_REG_DW          (0x06)
#define PCF2123_REG_MO          (0x07)
#define PCF2123_REG_YR          (0x08)
#define PCF2123_REG_ALRM_MN     (0x09)    /* Alarm Registers */
#define PCF2123_REG_ALRM_HR     (0x0a)
#define PCF2123_REG_ALRM_DM     (0x0b)
#define PCF2123_REG_ALRM_DW     (0x0c)
#define PCF2123_REG_OFFSET      (0x0d)    /* Clock Rate Offset Register */
#define PCF2123_REG_TMR_CLKOUT  (0x0e)    /* Timer Registers */
#define PCF2123_REG_CTDWN_TMR   (0x0f)

/* PCF2123_REG_CTRL1 BITS */
#define CTRL1_CLEAR             (0)                         /* Clear */
#define CTRL1_CORR_INT          (1<<1)                      /* Correction irq enable */
#define CTRL1_12_HOUR           (1<<2)                      /* 12 hour time */
#define CTRL1_SW_RESET          (1<<6) | (1<<4) | (1<<3)    /* Software reset */
#define CTRL1_STOP              (1<<5)                      /* Stop the clock */
#define CTRL1_EXT_TEST          (1<<7)                      /* External clock test mode */

/* PCF2123_REG_CTRL2 BITS */
#define CTRL2_TIE       (1)         /* Countdown timer irq enable */
#define CTRL2_AIE       (1<<1)      /* Alarm irq enable */
#define CTRL2_TF        (1<<2)      /* Countdown timer flag */
#define CTRL2_AF        (1<<3)      /* Alarm flag */
#define CTRL2_TI_TP     (1<<4)      /* Irq pin generates pulse */
#define CTRL2_MSF       (1<<5)      /* Minute or second irq flag */
#define CTRL2_SI        (1<<6)      /* Second irq enable */
#define CTRL2_MI        (1<<7)      /* Minute irq enable */

/* PCF2123_REG_SC BITS */
#define OSC_HAS_STOPPED      (1<<7)    /* Clock has been stopped */

/* PCF2123_REG_ALRM_XX BITS */
#define ALARM_ENABLE         (1<<7)    /* MN, HR, DM, or DW alarm enable */

/* PCF2123_REG_TMR_CLKOUT BITS */
#define CD_TMR_TE            (1<<3)    /* Countdown timer enable */

/* PCF2123_REG_OFFSET BITS */
#define OFFSET_SIGN_BIT       6         /* 2's complement sign bit */
#define OFFSET_COARSE         (1<<7)    /* Coarse mode offset */
#define OFFSET_STEP           (2170)    /* Offset step in parts per billion */

/* PCF2123 MASKS */
#define COF_MASK              0x70      // bits 6 to 4
#define CTD_MASK              0x03      // bits 1 to 0

/* PCF2123 SHIFTS */
#define COF_SHIFT             4
#define ALARM_EN_SHIFT        7

/*****************************************************************************
 * Variables
 ****************************************************************************/
static pcf2123_IoFunc_t sIoFunc;
static settingsPCF_t settings;
static bool initDriverDone = false;
static bool initHwDone = false;

/*****************************************************************************
 * Private functions
 ****************************************************************************/
static uint8_t PCF_SoftReset();

// software reset
uint8_t PCF_SoftReset()
{
    uint8_t wBuf[2] = {PCF2123_WRITE | PCF2123_REG_CTRL1, CTRL1_SW_RESET};

    // Reset all registers to POR value
    // 32.768 kHz on pin CLKOUT active, 24 hour mode is selected, Offset register is set to 0
    // No alarms set, Timer disabled, No interrupts enabled
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;
    else return PCF2123_SUCCESS;
}

/*****************************************************************************
 * Public functions
 ****************************************************************************/

// wrap the low level function (I2C write, I2C read, WaitMsec) required by PCF2123 driver
// this function does not initialize the HW
void PCF2123_Init_Driver(pcf2123_IoFunc_t* pIoFunc){
	assert((pIoFunc != NULL) &&
		   (pIoFunc->SPI_Read != NULL) &&
		   (pIoFunc->SPI_Write != NULL) &&
		   (pIoFunc->WaitMsec != NULL));
    sIoFunc = *pIoFunc;
    initDriverDone = true;
}

void PCF2123_Deinit_Driver(){
	if (initHwDone)
	{
		/* Deinit HW */
		// nothing to do as already very low consumption
	}
	/* Deinit driver */
	initDriverDone = false;
	initHwDone = false;
}

// Initialize the sensor
pcf2123_status_t PCF2123_Init_Hw(const settingsPCF_t* pcfSettings, bool initTime)
{
	pcf2123_status_t status = PCF2123_SUCCESS;

	if (!initDriverDone) return PCF2123_INIT_ERROR;
	assert(pcfSettings != NULL);

	/* trick to allow calling internal public functions */
	initHwDone = true;

	// initialize internal structures which will be used from now on
    memcpy( (void*)&settings, (void*)pcfSettings, sizeof(settings) );

    if (settings.Softreset == true)
    {
        // Reset all registers to POR values
        status = PCF_SoftReset();
        if (status != PCF2123_SUCCESS) goto return_status;
    }

    // Set Date and Time
    if(initTime)
    {
		status = PCF2123_SetDateTime(&settings);
		if (status != PCF2123_SUCCESS) goto return_status;
    }

    // Set Clock output pin frequency
    status = PCF2123_SetClockOutputFreq(settings.clockOutputFreq);
    if (status != PCF2123_SUCCESS) goto return_status;

    // Set/reset Minute & second interrupt
    status = PCF2123_SetMinSecInterrupt(settings.MinInterrupt, settings.SecInterrupt, settings.PulseInterrupt);
    if (status != PCF2123_SUCCESS) goto return_status;

    return_status:
    if (status != PCF2123_SUCCESS) initHwDone = false;
    return status;
}

// Read all the chip registers
pcf2123_status_t PCF2123_Dump(uint8_t *pcfReg)
{
    uint8_t wBuf[17];

	if (!initHwDone) return PCF2123_INIT_ERROR;
	assert(pcfReg != NULL);

    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL1;    // read + sub address;    // Start reading at register address 0
    // read all registers
    if (sIoFunc.SPI_Read(wBuf, pcfReg, 16) != 0) return PCF2123_I2C_ERROR; // Read all 16 registers

    return PCF2123_SUCCESS;
}

// Read Date and Time
pcf2123_status_t PCF2123_GetDateTime(settingsPCF_t* pcfDateTime)
{
    uint8_t wBuf[8] = {0};
    uint8_t rBuf[8] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;
	assert(pcfDateTime != NULL);

    wBuf[0] = PCF2123_READ | (PCF2123_REG_SC);    // read + sub address;    // Start reading at register address 0
    // read all registers
    if (sIoFunc.SPI_Read(wBuf, rBuf, 7) != 0) return PCF2123_I2C_ERROR; // Read all 16 registers
    pcfDateTime->seconds = rBuf[1];
    pcfDateTime->minutes = rBuf[2];
    pcfDateTime->hours = rBuf[3];
    pcfDateTime->days =rBuf[4];
    pcfDateTime->weekdays = rBuf[5];
    pcfDateTime->months = rBuf[6];
    pcfDateTime->years =rBuf[7];

    return PCF2123_SUCCESS;
}

// Set Date and Time
pcf2123_status_t PCF2123_SetDateTime(settingsPCF_t* pcfDateTime)
{
    uint8_t wBuf[8] = {0};
    uint8_t rBuf[8] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;
	assert(pcfDateTime != NULL);

    // set STOP bit <=> stop RTC clock before updating date and time
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL1;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;    // read REG_CTRL1

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1;
    wBuf[1] = rBuf[1] | CTRL1_STOP;                                        // Set STOP bit
    wBuf[1] = (pcfDateTime->mode12_24 == CTRL1_12_HOUR) ? wBuf[1]|CTRL1_12_HOUR : wBuf[1]&~CTRL1_12_HOUR ;    // Set 12_24H bit
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;        // Write it back

    // set the date and time
    wBuf[0] = PCF2123_WRITE | PCF2123_REG_SC;
    wBuf[1] = pcfDateTime->seconds;
    wBuf[2] = pcfDateTime->minutes;
    wBuf[3] = pcfDateTime->hours;
    wBuf[4] = pcfDateTime->days;
    wBuf[5] = pcfDateTime->weekdays;
    wBuf[6] = pcfDateTime->months;
    wBuf[7] = pcfDateTime->years;
    if (sIoFunc.SPI_Write(wBuf, 8) != 0) return PCF2123_I2C_ERROR;        // Write it back

    // reset STOP bit <=> restart RTC clock
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL1;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;    // read REG_CTRL1

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1;
    wBuf[1] = rBuf[1]  &~CTRL1_STOP ;            // reset STOP bit
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;        // Write it back

    return PCF2123_SUCCESS;
}

// Set Clock output pin frequency from 1Hz up to 32768Hz, or disabled = High Z
pcf2123_status_t PCF2123_SetClockOutputFreq(clockOutputPCF_t pcfClockOutputFreq)
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register Timer_clkout and set COF[2:0] field = clock output frequency
    wBuf[0] = PCF2123_READ | PCF2123_REG_TMR_CLKOUT;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_TMR_CLKOUT;
    wBuf[1] = (rBuf[1] & ~COF_MASK) | (pcfClockOutputFreq << COF_SHIFT);    // Set COF[2:0]
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Countdown interrupt
// interrupt generated when countdown flag set
pcf2123_status_t PCF2123_SetCountdownInterrupt(bool Countdown_Int)
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register CTRL_2 and reset TF bit
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL2;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL2;
    wBuf[1] = (Countdown_Int == true) ? wBuf[1] | CTRL2_TIE : wBuf[1] & ~CTRL2_TIE;        // Set/Reset countdown interrupt
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Countdown timer source clock.
pcf2123_status_t PCF2123_SetCountdownMode(bool CountDownEn, cdmodePCF_t CountDownMode)
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register Timer_clkout. Set CTD[1:0] and TE
    wBuf[0] = PCF2123_READ | PCF2123_REG_TMR_CLKOUT;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_TMR_CLKOUT;
    wBuf[1] = (CountDownEn == true) ? rBuf[1] | CD_TMR_TE : rBuf[1] &~CD_TMR_TE;    // Set/reset TE bit
    wBuf[1] = (wBuf[1] & ~CTD_MASK) | (CountDownMode);    // Set CTD[1:0]
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Countdown timer value
pcf2123_status_t PCF2123_SetCountdownTimer(uint8_t CDT_Value)
{
    uint8_t wBuf[2] = {PCF2123_WRITE | PCF2123_REG_CTDWN_TMR, CDT_Value};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Offset register
pcf2123_status_t PCF2123_SetOffset(bool mode, uint8_t Offset)
{
    uint8_t wBuf[2] = {PCF2123_WRITE | PCF2123_REG_OFFSET, (mode << 7) | (Offset & 0x7f)};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Minute and second interrupt
pcf2123_status_t PCF2123_SetMinSecInterrupt(bool Minute_Int, bool Second_Int, bool Pulse_Int)
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register CTRL_2 and set MI/SI bits
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL2;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL2;
    wBuf[1] = (Minute_Int == true) ? wBuf[1] | CTRL2_MI : wBuf[1] & ~CTRL2_MI;        // Set/Reset minute interrupt
    wBuf[1] = (Second_Int == true) ? wBuf[1] | CTRL2_SI : wBuf[1] & ~CTRL2_SI;        // Set/Reset minute interrupt
    wBuf[1] = (Pulse_Int == true) ? wBuf[1] | CTRL2_TI_TP : wBuf[1] & ~CTRL2_TI_TP;    // Set/Reset interrupt pulse mode
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Alarm interrupt
pcf2123_status_t PCF2123_SetAlarmInterrupt(bool Alarm_Int)
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register CTRL_2 and reset TF bit
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL2;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL2;
    wBuf[1] = (Alarm_Int == true) ? wBuf[1] | CTRL2_AIE : wBuf[1] & ~CTRL2_AIE;        // Set/Reset alarm interrupt
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Clear minute or second interrupt flag MSF
pcf2123_status_t PCF2123_ClearMinSecInterruptFlag()
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register CTRL_2 and reset MSF bit
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL2;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL2;
    wBuf[1] &= ~CTRL2_MSF;                                                // Reset MSF bit
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Clear Timer countdown flag TF
pcf2123_status_t PCF2123_ClearCountdownInterruptFlag()
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register CTRL_2 and reset TF bit
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL2;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL2;
    wBuf[1] &= ~CTRL2_TF;                                                // Reset TF bit
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Clear Alarm flag AF
pcf2123_status_t PCF2123_ClearAlarmInterruptFlag()
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register CTRL_2 and reset TF bit
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL2;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL2;
    wBuf[1] &= ~CTRL2_AF;                                                // Reset AF bit
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Minute alarm
pcf2123_status_t PCF2123_SetMinuteAlarm(bool AlarmEn, uint8_t Minute)
{
    uint8_t wBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_ALRM_MN;
    wBuf[1] = (~AlarmEn << ALARM_EN_SHIFT) | (Minute & 0x7F);    // Alarm AE_M: minute alarm enabled when 0
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Hour alarm
pcf2123_status_t PCF2123_SetHourAlarm(bool AlarmEn, bool AMPM, uint8_t Hour)
{
    uint8_t wBuf[2] = {0};
    uint8_t rBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    // read register CTRL_1 to check if 12H or 24H mode is selected
    wBuf[0] = PCF2123_READ | PCF2123_REG_CTRL1;
    if (sIoFunc.SPI_Read(wBuf, rBuf, 1) != 0) return PCF2123_I2C_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_ALRM_HR;
    wBuf[1] = (rBuf[1] & CTRL1_12_HOUR) ? (~AlarmEn << ALARM_EN_SHIFT) | (Hour & 0x7F) : (~AlarmEn << ALARM_EN_SHIFT) | (AMPM << 5) | (Hour & 0x3F);

    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Day alarm
pcf2123_status_t PCF2123_SetDayAlarm(bool AlarmEn, uint8_t Day)
{
    uint8_t wBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_ALRM_DM;
    wBuf[1] = (~AlarmEn << ALARM_EN_SHIFT) | (Day & 0x3F);
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

// Set Weekday alarm
pcf2123_status_t PCF2123_SetWeekdayAlarm(bool AlarmEn, uint8_t Weekday)
{
    uint8_t wBuf[2] = {0};

	if (!initHwDone) return PCF2123_INIT_ERROR;

    wBuf[0] = PCF2123_WRITE | PCF2123_REG_ALRM_DW;
    wBuf[1] = (~AlarmEn << ALARM_EN_SHIFT) | (Weekday & 0x03);
    if (sIoFunc.SPI_Write(wBuf, 2) != 0) return PCF2123_I2C_ERROR;

    return PCF2123_SUCCESS;
}

SPI Bus Share Source

C/C++
SPI Bus Share between KW41 and K64
/*
 * Copyright 2017 NXP
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
 *
 * o Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <string.h>
#include "fsl_gpio.h"
#include "board.h"
#include "fsl_dspi.h"
#include "fsl_port.h"
#include "spi_flash_driver.h"
#include "pin_mux.h"
#include "pin_mux_rpk.h"
#if defined(FSL_RTOS_FREE_RTOS)
#include "fsl_os_abstraction.h"
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
#endif
#include "spi_bus_share.h"
#if defined(CPU_MK64FN1M0VMD12)
#include "port_interrupts.h"
#endif
#if !defined(FSL_RTOS_FREE_RTOS)
#include "microseconds.h"
#endif
//#if defined(RAPID_IOT) && defined(CPU_MKW41Z512VHT4)
//#include "portmacro.h"
//#endif

//! @addtogroup spi_bus_share
//! @{

////////////////////////////////////////////////////////////////////////////////
// Prototypes
////////////////////////////////////////////////////////////////////////////////


////////////////////////////////////////////////////////////////////////////////
// Variables
////////////////////////////////////////////////////////////////////////////////

// Uncomment to use SPI bus flow control between the K64 and K41 processors
#define RPK_USE_FLOW_CONTROL 1
volatile bool bSPIBusgInitialized = false;
volatile bool mSPIBusLocked = false;
volatile bool mSPIBusRequest = false;

volatile static int icount = 0;
volatile static int IRQCount = 0;
volatile static int IRQCountSave = 0;


////////////////////////////////////////////////////////////////////////////////
// Code
////////////////////////////////////////////////////////////////////////////////

//! @brief Initialize SPI Bus so it can be used
status_t SPI_Bus_Share_Init(void)
{
    if (!bSPIBusgInitialized)
    {
        SPI_Bus_Share_Release_Access();
        bSPIBusgInitialized = true;
    }
    return(SPI_BUS_SHARE_NO_ERROR);
}


#if defined(CPU_MK64FN1M0VMD12)
void BOARD_K41Z_RTS_IRQ_HANDLER(uint32_t pin_nb)
{
    IRQCount+=1;

    if(!bSPIBusgInitialized)
        return;

    if(!mSPIBusLocked && !mSPIBusRequest)
           GPIO_WritePinOutput(BOARD_INITPINS_KW41_UART_CTS_GPIO, BOARD_INITPINS_KW41_UART_CTS_PIN, 1);

    GPIO_ClearPinsInterruptFlags(BOARD_INITPINS_KW41_UART_RTS_GPIO, 1U << BOARD_INITPINS_KW41_UART_RTS_PIN);
}
#endif


//! @brief Uninitialize SPI Bus so it can be used by another app / device
status_t SPI_Bus_Share_DeInit(void)
{
    SPI_Bus_Share_Release_Access();
    return(SPI_BUS_SHARE_NO_ERROR);
}


status_t SPI_Bus_Share_Get_Access(void)
{
    if(mSPIBusLocked)
        return(SPI_BUS_SHARE_NO_ERROR);

    // Make sure this driver is initialized
    if (!bSPIBusgInitialized)
        SPI_Bus_Share_Init();

    SPI_Bus_Share_Wait_For_Access();
    OS_App_WaitUsec(20);
    BOARD_ConfigurePins_RPK_SPI_Bus();
    OS_App_WaitUsec(20);
    icount+=1;
    return(SPI_BUS_SHARE_NO_ERROR);
}


status_t SPI_Bus_Share_Release_Access(void)
{
    if(!mSPIBusLocked)
        return(SPI_BUS_SHARE_NO_ERROR);

    OS_App_WaitUsec(20);
    BOARD_UnConfigurePins_RPK_SPI_Bus();
    OS_App_WaitUsec(20);
    icount+=1;

#if defined(RAPID_IOT) && defined(CPU_MKW41Z512VHT4)
    // Release SPI access to K64F by setting RTS pin low
    GPIO_WritePinOutput(BOARD_INITPINS_K64F_UART_RTS_PC5_GPIO, BOARD_INITPINS_K64F_UART_RTS_PC5_GPIO_PIN, 0);
#endif

    mSPIBusLocked = false;
    return(SPI_BUS_SHARE_NO_ERROR);
}

status_t SPI_Bus_Share_Wait_For_Access(void)
{

#ifndef RPK_USE_FLOW_CONTROL
    return(SPI_BUS_SHARE_NO_ERROR);
#endif

    // PC4 (CTS) connected to PE27
    // PC5 (RTS) connected to PE26
#if defined(RAPID_IOT) && defined(CPU_MKW41Z512VHT4)

    uint32_t i=0;
    icount=0;

    // Wait until the K64F approves the request
    while(1)
    {
        // Request SPI access from the K64F
        GPIO_WritePinOutput(BOARD_INITPINS_K64F_UART_RTS_PC5_GPIO, BOARD_INITPINS_K64F_UART_RTS_PC5_GPIO_PIN, 0);
        OS_App_WaitUsec(1);
        GPIO_WritePinOutput(BOARD_INITPINS_K64F_UART_RTS_PC5_GPIO, BOARD_INITPINS_K64F_UART_RTS_PC5_GPIO_PIN, 1);
        OS_App_WaitUsec(1);
        for(i=0;i<100;i++)
        {
            if(GPIO_ReadPinInput(BOARD_INITPINS_K64F_UART_CTS_PC4_GPIO, BOARD_INITPINS_K64F_UART_CTS_PC4_GPIO_PIN)!=0)
            {
                OS_App_WaitUsec(1);
                if(GPIO_ReadPinInput(BOARD_INITPINS_K64F_UART_CTS_PC4_GPIO, BOARD_INITPINS_K64F_UART_CTS_PC4_GPIO_PIN)!=0)
                    break;
            }
            icount+=1;
        }
        if(i<100)
        {
            icount+=1;
            mSPIBusLocked=true;
            break;
        }
    }

#elif defined(RAPID_IOT) && defined(CPU_MK64FN1M0VMD12)
    if(GPIO_ReadPinInput(BOARD_INITPINS_KW41_RST_GPIO, BOARD_INITPINS_KW41_RST_GPIO_PIN)!=0)
    {
        while(1)
        {
            mSPIBusRequest = true;
            IRQCountSave = IRQCount;
            if(GPIO_ReadPinInput(BOARD_INITPINS_KW41_UART_RTS_GPIO, BOARD_INITPINS_KW41_UART_RTS_PIN)==0)
            {
                GPIO_WritePinOutput(BOARD_INITPINS_KW41_UART_CTS_GPIO, BOARD_INITPINS_KW41_UART_CTS_PIN, 0);
                if(IRQCountSave == IRQCount)
                {
                    mSPIBusLocked = true;
                    break;
                }
            }
            else
            {
                GPIO_WritePinOutput(BOARD_INITPINS_KW41_UART_CTS_GPIO, BOARD_INITPINS_KW41_UART_CTS_PIN, 1);
                while(GPIO_ReadPinInput(BOARD_INITPINS_KW41_UART_RTS_GPIO, BOARD_INITPINS_KW41_UART_RTS_PIN)!=0)
                {
                    OS_App_WaitMsec(1);
                }
                GPIO_WritePinOutput(BOARD_INITPINS_KW41_UART_CTS_GPIO, BOARD_INITPINS_KW41_UART_CTS_PIN, 0);
                while(GPIO_ReadPinInput(BOARD_INITPINS_KW41_UART_RTS_GPIO, BOARD_INITPINS_KW41_UART_RTS_PIN)!=0)
                {
                    OS_App_WaitMsec(1);
                }
                mSPIBusLocked = true;
                break;
            }
        }
    }
    else
    {
        mSPIBusLocked = true;
    }
#endif
    mSPIBusRequest = false;
    return(SPI_BUS_SHARE_NO_ERROR);
}

void OS_App_WaitMsec(uint32_t msec)
{
#if !defined(BOOTLOADER)
#if defined(RAPID_IOT) && defined(CPU_MKW41Z512VHT4)

#if defined(FSL_RTOS_FREE_RTOS)
    BaseType_t tskSchState = xTaskGetSchedulerState();

    /* Check if the task scheduler has started */
    if (taskSCHEDULER_NOT_STARTED != tskSchState)
    {
        OSA_TimeDelay(msec);
    }
    else
    {
        volatile uint32_t count = msec * 1000;
        while (count--);
    }
#else
    microseconds_delay(msec*1000);
#endif
#else
    App_WaitMsec(msec);
#endif
#else
    microseconds_delay(msec*1000);
#endif
}


void OS_App_WaitUsec(uint32_t usec)
{
#if !defined(BOOTLOADER)
#if defined(RAPID_IOT) && defined(CPU_MKW41Z512VHT4)

#if defined(FSL_RTOS_FREE_RTOS)
    BaseType_t tskSchState = xTaskGetSchedulerState();

    /* Check if the task scheduler has started */
    if (taskSCHEDULER_NOT_STARTED != tskSchState)
    {
        OSA_TimeDelay_Usec(usec);
    }
    else
    {
        volatile uint32_t count = usec;
        while (count--);
    }
#else
    microseconds_delay(usec);
#endif
#else
    App_WaitUsec(usec);
#endif
#else
    microseconds_delay(usec);
#endif
}

//! @}

////////////////////////////////////////////////////////////////////////////////
// EOF
////////////////////////////////////////////////////////////////////////////////

PCF2123 RTC header

C Header File
PCF2123 RTC header
/*
 * Copyright (c) 2018 NXP
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
 *
 * o Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*!
 * @file
 * This is the header file for the real time clock sensor PCF2123 driver.
 */

#ifndef PCF2123_H_
#define PCF2123_H_

/*!
 * @addtogroup pcf2123 PCF2123 real time clock sensor API
 * @{
 */

#include <stdbool.h>
#include <EmbeddedTypes.h>

typedef struct _pcf2123_IoFunc_t
{
  uint8_t   (*SPI_Read)(uint8_t *writeBuf, uint8_t *readBuf, uint32_t readSize);
  uint8_t   (*SPI_Write)(uint8_t *writeBuf, uint32_t writeSize);
  void      (*WaitMsec)(uint32_t millisec);
} pcf2123_IoFunc_t, *ppcf2123_IoFunc_t;

/*****************************************************************************
 * Types/enumerations/variables
 ****************************************************************************/

#define PCF2123_NB_REG           (16)    // Nb of registers

/* READ/WRITE ADDRESS BITS */
#define PCF2123_WRITE            (1<<4)
#define PCF2123_READ             ((1<<7) | (1<<4))
#define PCF2123_ADDRESS_MASK     (0x0f)

typedef enum
{
  PCF2123_SUCCESS,
  PCF2123_I2C_ERROR,
  PCF2123_INIT_ERROR,
  PCF2123_TIMEOUT
} pcf2123_status_t;

//***************************************
// Structure that contains PCF settings.
//***************************************

typedef enum {
  PCF2123_MODE_24HOURS    = 0,
  PCF2123_MODE_12HOURS    = (1<<2),
} modePCF_t;

typedef enum {
    Sunday        = 0,
    Monday        = 1,
    Tuesday       = 2,
    Wednesday     = 3,
    Thursday      = 4,
    Friday        = 5,
    Saturday      = 6,
} weekdaysPCF_t;

typedef enum {
    January       = 0x1,
    February      = 0x2,
    March         = 0x3,
    April         = 0x4,
    May           = 0x5,
    June          = 0x6,
    July          = 0x7,
    August        = 0x8,
    September     = 0x9,
    October       = 0x10,
    November      = 0x11,
    December      = 0x12,
} monthsPCF_t;

typedef enum {
    clkoutFreq_32768   = 0,        // Clock output frequency = 32768Hz
    clkoutfreq_16384   = 1,
    clkoutFreq_8192    = 2,
    clkoutFreq_4096    = 3,
    clkoutFreq_2408    = 4,
    clkoutFreq_1024    = 5,
    clkoutFreq_1       = 6,        // Clock output frequency = 1Hz
    clkout_High_Z      = 7,        // Clock output is High Z
} clockOutputPCF_t;

typedef enum
{
    CD_TMR_4096KHZ        = 0,    /* 4096 KHz countdown timer */
    CD_TMR_64HZ           = 1,    /* 64 Hz countdown timer */
    CD_TMR_1HZ            = 2,    /* 1 Hz countdown timer */
    CD_TMR_60th_HZ        = 3,    /* 60th Hz countdown timer */
} cdmodePCF_t;

typedef struct {
    modePCF_t           mode12_24;          // 12H or 24H mode
    bool                Softreset;          // Force software reset => Date, time and interrupts need to be set after
    uint8_t             seconds;            // seconds in BCD
    uint8_t             minutes;            // minutes in BCD
    uint8_t             hours;              // hours in BCD.
                                            /* 24H mode: bit 5,4 used for first digit
                                               12H mode: bit 5=AM/PM, bit 4 used for first digit */
    uint8_t             days;               // day in BCD
    weekdaysPCF_t       weekdays;           //
    monthsPCF_t         months;             // actual month coded in BCD
    uint8_t             years;              // 2 digits
    clockOutputPCF_t    clockOutputFreq;    // Clock output pin frequency from 1H to 32768Hz or Disabled = high Z
    bool                MinInterrupt;       // Minute interrupt
    bool                SecInterrupt;       // Second interrupt
    bool                PulseInterrupt;     // Interrupt generate a pulse when true. Follows timer flag when false
} settingsPCF_t;


/*****************************************************************************
 * Function Prototypes
 ****************************************************************************/

/*!
 * @brief   Initialize PCF2123 driver.
 * @param   pIoFunc  Pointer to a structure of external functions or values
 */
void PCF2123_Init_Driver(pcf2123_IoFunc_t* pIoFunc);

/*!
 * @brief   De-initialize PCF2123 driver.
 */
void PCF2123_Denit_Driver();

/*!
 * @brief   Initialize PCF2123 hardware.
 * @param   pcfSettings  Pointer to a configuration structure
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_Init_Hw(const settingsPCF_t* pcfSettings, bool initTime);

/*!
 * @brief Read all chip registers.
 * @param   pcfReg  Pointer to register dump.
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_Dump(uint8_t *pcfReg);

/*!
 * @brief Set Offset register
 * The offset is made once every two hours in the normal mode, or once every hour in the
 * course mode. Each LSB will introduce an offset of 2.17 ppm for normal mode and
 * 4.34 ppm for course mode. The values of 2.17 ppm and 4.34 ppm are based on a nominal
 * 32.768 kHz clock. The offset value is coded in two’s complement giving a range of +63 LSB to -64 LSB.
 * Normal mode = 0, Course mode = 1
 * @param   mode (normal = 0, course = 1)
 * @param   Offset (+63..-64, two's complement)
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetOffset(bool mode, uint8_t Offset);

/*!
 * @brief Read Date and Time
 * @param   pcfDateTime  Pointer to the updated structure
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_GetDateTime(settingsPCF_t* pcfDateTime);

/*!
 * @brief Set Date and Time
 * @param   pcfDateTime  Pointer to the reference structure
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetDateTime(settingsPCF_t* pcfDateTime);

/*!
 * @brief Set Clock output pin frequency from 1Hz up to 32768Hz, or disabled = High Z
 * @param   pcfClockOutputFreq  Pointer to the clock output frequency value
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetClockOutputFreq(clockOutputPCF_t pcfClockOutputFreq);

/*!
 * @brief Set Minute and second interrupt
 * The minute and second interrupts (bits MI and SI) are pre-defined timers for generating
 * periodic interrupts. The timers can be enabled independently from one another. However,
 * a minute interrupt enabled on top of a second interrupt will not be distinguishable since it
 * will occur at the same time
 * @param   Minute_Int Enable the minute interrupt
 * @param   Second_Int Enable the second interrupt
 * @param   Pulse_Int  Enable the pulse interrupt
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetMinSecInterrupt(bool Minute_Int, bool Second_Int, bool Pulse_Int);

/*!
 * @brief Set Alarm interrupt
 * Interrupt generated when alarm flag set.
 * @param   Alarm_Int Enable the alarm interrupt
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetAlarmInterrupt(bool Alarm_Int);

/*!
 * @brief Set Countdown interrupt
 * Interrupt generated when countdown flag set.
 * @param   Countdown_Int Enable the countdown interrupt
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetCountdownInterrupt(bool Countdown_Int);

/*!
 * @brief Set Countdown timer source clock
 * @param   CountDownEn Enable the countdown timer source clock
 * @param   CountDownMode Countdown mode (CD_TMR_4096KHZ, CD_TMR_64HZ, CD_TMR_1HZ, CD_TMR_60th_HZ)
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetCountdownMode(bool CountDownEn, cdmodePCF_t CountDownMode);

/*!
 * @brief Set Countdown timer value
 * @param   CDT_Value Countdown timer value
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetCountdownTimer(uint8_t CDT_Value);

/*!
 * @brief Set Minute alarm
 * Minute alarm information coded in *** BCD format ***
 * When the register Minute_alarm is loaded with a valid minute and it's corresponding alarm bit is logic 0
 * that information will be compared with the current minute.
 * @param   AlarmEn Enable alarm
 * @param   Minute  Number of minutes
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetMinuteAlarm(bool AlarmEn, uint8_t Minute);

/*!
 * @brief Set Hour alarm
 * Hour alarm information coded in *** BCD format ***.
 * When the register Hour is loaded with a valid hour and it's corresponding alarm bit is logic 0
 * that information will be compared with the current hour.
 * AMPM = 0 indicates AM (only valid in 12 hours mode)
 * @param   AlarmEn Enable alarm
 * @param   AMPM  AMPM mode (0 is AM, 1 is PM)
 * @param   Hour  Number of hours
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetHourAlarm(bool AlarmEn, bool AMPM, uint8_t Hour);

/*!
 * @brief Set Day alarm
 * Day alarm information coded in *** BCD format ***.
 * When the register Day_alarm is loaded with a valid day and it's corresponding alarm bit is logic 0
 * that information will be compared with the current Day.
 * @param   AlarmEn Enable alarm
 * @param   Day     Number of days
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetDayAlarm(bool AlarmEn, uint8_t Day);

/*!
 * @brief Set Weekday alarm
 * Weekday alarm information coded in *** BCD format ***.
 * When the register weekday_alarm is loaded with a valid day and it's corresponding alarm bit is logic 0
 * that information will be compared with the current weekday.
 * @param   AlarmEn Enable alarm
 * @param   Weekday Day of the week (0-6: 0 is Sunday, etc.)
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_SetWeekdayAlarm(bool AlarmEn, uint8_t Weekday);

/*!
 * @brief Clear minute or second interrupt flag MSF
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_ClearMinSecInterruptFlag();

/*!
 * @brief Clear Timer countdown flag TF
 * Flag set as the end of a timer countdown.
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_ClearCountdownInterruptFlag();

/*!
 * @brief Clear Alarm flag AF
 * Flag set by alarm event.
 * @return  The return status value (0 for success)
 */
pcf2123_status_t PCF2123_ClearAlarmInterruptFlag();

/*! @}*/

#endif /* PCF2123_H_ */

SPI Bus Share Header

C Header File
SPI Bus Share Header
/*
 * Copyright 2017 NXP
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
 *
 * o Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef _SPI_BUS_SHARE_INIT_H_
#define _SPI_BUS_SHARE_INIT_H_

#include "fsl_common.h"

//! @addtogroup SPI_Share
//! @{

////////////////////////////////////////////////////////////////////////////////
// Definitions
////////////////////////////////////////////////////////////////////////////////

#define SPI_BUS_SHARE_NO_ERROR 0
#define SPI_BUS_SHARE_ERROR 1


////////////////////////////////////////////////////////////////////////////////
// Prototypes
////////////////////////////////////////////////////////////////////////////////


#if defined(__cplusplus)
extern "C" {
#endif // __cplusplus

status_t SPI_Bus_Share_Init(void);
status_t SPI_Bus_Share_DeInit(void);
status_t SPI_Bus_Share_Get_Access(void);
status_t SPI_Bus_Share_Release_Access(void);
status_t SPI_Bus_Share_Wait_For_Access(void);
void OS_App_WaitMsec(uint32_t msec);
void OS_App_WaitUsec(uint32_t usec);
void BOARD_K41Z_RTS_IRQ_HANDLER(uint32_t pin_nb);

#if defined(__cplusplus)
}
#endif // __cplusplus

//! @}

#endif // _SPI_BUS_SHARE_INIT_H_
////////////////////////////////////////////////////////////////////////////////
// EOF
////////////////////////////////////////////////////////////////////////////////

Credits

Marco Merlin

Marco Merlin

4 projects • 7 followers
Electronics Engineer, passionate for tech and music, able to "get things done", curious and aspiring to "solve real-life problems".

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