qpcpp/examples/embos/arm-cm/dpp_nucleo-h743zi/bsp.cpp

//============================================================================
// Product: DPP example, NUCLEO-H743ZI board, embOS RTOS kernel
// Last updated for: @qpcpp_7_0_0
// Last updated on  2021-12-21
//
//                    Q u a n t u m  L e a P s
//                    ------------------------
//                    Modern Embedded Software
//
// Copyright (C) 2005-2021 Quantum Leaps. All rights reserved.
//
// This program is open source software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Alternatively, this program may be distributed and modified under the
// terms of Quantum Leaps commercial licenses, which expressly supersede
// the GNU General Public License and are specifically designed for
// licensees interested in retaining the proprietary status of their code.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <www.gnu.org/licenses>.
//
// Contact information:
// <www.state-machine.com/licensing>
// <info@state-machine.com>
//============================================================================
#include "qpcpp.hpp"
#include "dpp.hpp"
#include "bsp.hpp"

/* STM32CubeH7 include files */
#include "stm32h7xx_hal.h"
#include "stm32h7xx_nucleo_144.h"
// add other drivers if necessary...

Q_DEFINE_THIS_FILE // define the name of this file for assertions

// namespace DPP *************************************************************
namespace DPP {

// Local-scope objects -------------------------------------------------------
static uint32_t l_rnd; // random seed

#ifdef Q_SPY

    QP::QSTimeCtr QS_tickTime_;
    QP::QSTimeCtr QS_tickPeriod_;

    // QS source IDs
    static QP::QSpyId const l_embos_ticker = { 0U };

    static UART_HandleTypeDef l_uartHandle;

    enum AppRecords { // application-specific trace records
        PHILO_STAT = QP::QS_USER,
        COMMAND_STAT,
    };

#endif

// embOS application hooks ===================================================
extern "C" {

//............................................................................
static void tick_handler(void) {  /* signature of embOS tick hook routine */
    /* state of the button debouncing, see below */
    static struct ButtonsDebouncing {
        uint32_t depressed;
        uint32_t previous;
    } buttons = { ~0U, ~0U };
    uint32_t current;
    uint32_t tmp;
    static uint_fast8_t ctr = 1U;

#ifdef Q_SPY
    {
        tmp = SysTick->CTRL; /* clear SysTick_CTRL_COUNTFLAG */
        QS_tickTime_ += QS_tickPeriod_; /* account for the clock rollover */
    }
#endif

    /* scale down the 1000Hz embOS tick to the desired BSP_TICKS_PER_SEC */
    if (--ctr == 0U) {
        ctr = 1000U/DPP::BSP::TICKS_PER_SEC;
        QP::QTimeEvt::TICK_X(0U, &l_embos_ticker);

        /* Perform the debouncing of buttons. The algorithm for debouncing
        * adapted from the book "Embedded Systems Dictionary" by Jack Ganssle
        * and Michael Barr, page 71.
        */
        current = BSP_PB_GetState(BUTTON_KEY); /* read the Key button */
        tmp = buttons.depressed; /* save the debounced depressed buttons */
        buttons.depressed |= (buttons.previous & current); /* set depressed */
        buttons.depressed &= (buttons.previous | current); /* clear released */
        buttons.previous   = current; /* update the history */
        tmp ^= buttons.depressed;     /* changed debounced depressed */
        if (tmp != 0U) {  /* debounced Key button state changed? */
            if (buttons.depressed != 0U) { /* PB0 depressed?*/
                static QP::QEvt const pauseEvt = { DPP::PAUSE_SIG, 0U, 0U};
                QP::QF::PUBLISH(&pauseEvt, &l_embos_ticker);
            }
            else { // the button is released
                static QP::QEvt const serveEvt = { DPP::SERVE_SIG, 0U, 0U};
                QP::QF::PUBLISH(&serveEvt, &l_embos_ticker);
            }
        }
    }
}

//............................................................................
void USART3_IRQHandler(void); // prototype
#ifdef Q_SPY
// ISR for receiving bytes from the QSPY Back-End
// NOTE: This ISR is "QF-unaware" meaning that it does not interact with
// the QF and is not disabled. Such ISRs don't need to call QK_ISR_ENTRY/
// QK_ISR_EXIT and they cannot post or publish events.
//
void USART3_IRQHandler(void) {
    // is RX register NOT empty?
    if ((DPP::l_uartHandle.Instance->ISR & USART_ISR_RXNE_RXFNE) != 0) {
        uint32_t b = DPP::l_uartHandle.Instance->RDR;
        QP::QS::rxPut(b);
        DPP::l_uartHandle.Instance->ISR &= ~USART_ISR_RXNE_RXFNE; // clear int
    }
}
#endif // Q_SPY

/*
*  OS_Idle() function overridden from RTOSInit_STM32F4x_CMSIS.c
*
*  Function description
*    This is basically the "core" of the embOS idle loop.
*    This core loop can be changed, but:
*    The idle loop does not have a stack of its own, therefore no
*    functionality should be implemented that relies on the stack
*    to be preserved. However, a simple program loop can be programmed
*    (like toggling an output or incrementing a counter)
*/
void OS_Idle(void) {
    while (1) {

        QF_INT_DISABLE();
        BSP_LED_On(LED3);
        BSP_LED_On(LED3);
        QF_INT_ENABLE();

    #ifdef Q_SPY
        QP::QS::rxParse();  // parse all the received bytes

        if ((DPP::l_uartHandle.Instance->ISR & UART_FLAG_TXE) != 0U) {//TXE empty?
            uint16_t b;

            QF_INT_DISABLE();
            b = QP::QS::getByte();
            QF_INT_ENABLE();

            if (b != QP::QS_EOD) {  // not End-Of-Data?
                DPP::l_uartHandle.Instance->TDR = (b & 0xFFU); // put into TDR
            }
        }
#elif defined NDEBUG
        /* Put the CPU and peripherals to the low-power mode.
        * you might need to customize the clock management for your application,
        * see the datasheet for your particular Cortex-M MCU.
        */
        /* !!!CAUTION!!!
        * The WFI instruction stops the CPU clock, which unfortunately disables
        * the JTAG port, so the ST-Link debugger can no longer connect to the
        * board. For that reason, the call to __WFI() has to be used with CAUTION.
        *
        * NOTE: If you find your board "frozen" like this, strap BOOT0 to VDD and
        * reset the board, then connect with ST-Link Utilities and erase the part.
        * The trick with BOOT(0) is it gets the part to run the System Loader
        * instead of your broken code. When done disconnect BOOT0, and start over.
        */
        //__WFI(); /* Wait-For-Interrupt */
#elif defined NDEBUG
        /* Put the CPU and peripherals to the low-power mode.
        * NOTE: You might need to customize the clock management for your
        * application, see the datasheet for your particular Cortex-M3 MCU.
        */
        /* !!!CAUTION!!!
        * The WFI instruction stops the CPU clock, which unfortunately
        * disables the STM32 JTAG port, so the ST-Link debugger can no longer
        * connect to the board. For that reason, the call to __WFI() has to
        * be used with CAUTION. See also NOTE02
        */
#if ((OS_VIEW_IFSELECT != OS_VIEW_IF_JLINK) && (OS_DEBUG == 0))
        //__WFI(); /* Wait-For-Interrupt */
#endif
#endif
    }
}

} // extern "C"

// BSP functions =============================================================
void BSP::init(void) {
    // NOTE: SystemInit() has been already called from the startup code
    //  but SystemCoreClock needs to be updated
    //
    SystemCoreClockUpdate();

    SCB_EnableICache(); // Enable I-Cache
    SCB_EnableDCache(); // Enable D-Cache

    // Configure Flash prefetch and Instr. cache through ART accelerator
#if (ART_ACCLERATOR_ENABLE != 0)
    __HAL_FLASH_ART_ENABLE();
#endif // ART_ACCLERATOR_ENABLE

    // Explictily Disable the automatic FPU state preservation as well as
    // the FPU lazy stacking
    //
    FPU->FPCCR &= ~((1U << FPU_FPCCR_ASPEN_Pos) | (1U << FPU_FPCCR_LSPEN_Pos));

    // Configure the LEDs
    BSP_LED_Init(LED1);
    BSP_LED_Init(LED2);
    BSP_LED_Init(LED3);

    // Configure the User Button in GPIO Mode
    BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);

    //...
    BSP::randomSeed(1234U);

    // initialize the QS software tracing...
    if (!QS_INIT(nullptr)) {
        Q_ERROR();
    }
    QS_OBJ_DICTIONARY(&l_embos_ticker);
    QS_USR_DICTIONARY(PHILO_STAT);
    QS_USR_DICTIONARY(COMMAND_STAT);

    // setup the QS filters...
    QS_GLB_FILTER(QP::QS_SM_RECORDS); // state machine records
    QS_GLB_FILTER(QP::QS_AO_RECORDS); // active object records
    QS_GLB_FILTER(QP::QS_UA_RECORDS); // all user records
}
//............................................................................
void BSP::displayPhilStat(uint8_t n, char const *stat) {
    if (stat[0] == 'h') {
        BSP_LED_On(LED1); // turn LED on
    }
    else {
        BSP_LED_Off(LED1); // turn LED off
    }
    if (stat[0] == 'e') {
        BSP_LED_On(LED2); // turn LED on
    }
    else {
        BSP_LED_Off(LED2); // turn LED on
    }

    QS_BEGIN_ID(PHILO_STAT, AO_Philo[n]->m_prio) // app-specific record begin
        QS_U8(1, n);  // Philosopher number
        QS_STR(stat); // Philosopher status
    QS_END()          // application-specific record end
}
//............................................................................
void BSP::displayPaused(uint8_t paused) {
    if (paused != 0U) {
        BSP_LED_On(LED2);
    }
    else {
        BSP_LED_Off(LED2);
    }
}
//............................................................................
uint32_t BSP::random(void) { // a very cheap pseudo-random-number generator
    // flating point code is to exercise the FPU
    double volatile x = 3.1415926F;
    x = x + 2.7182818F;

    // "Super-Duper" Linear Congruential Generator (LCG)
    // LCG(2^32, 3*7*11*13*23, 0, seed)
    //
    uint32_t rnd = l_rnd * (3U*7U*11U*13U*23U);
    l_rnd = rnd; // set for the next time

    return (rnd >> 8);
}
//............................................................................
void BSP::randomSeed(uint32_t seed) {
    l_rnd = seed;
}

//............................................................................
void BSP::terminate(int16_t result) {
    (void)result;
}

} // namespace DPP


// namespace QP **************************************************************
namespace QP {

// QF callbacks ==============================================================
static OS_TICK_HOOK tick_hook;

void QF::onStartup(void) {
    OS_TICK_AddHook(&tick_hook, &DPP::tick_handler);

#ifdef Q_SPY
    NVIC_SetPriority(USART3_IRQn,  0U); // kernel unaware interrupt
    NVIC_EnableIRQ(USART3_IRQn); // UART interrupt used for QS-RX
#endif
}
//............................................................................
void QF::onCleanup(void) {
}

//............................................................................
extern "C" Q_NORETURN Q_onAssert(char const * const module, int_t const loc) {
    //
    // NOTE: add here your application-specific error handling
    //
    (void)module;
    (void)loc;
    QS_ASSERTION(module, loc, static_cast<uint32_t>(10000U));
    NVIC_SystemReset();
}

// QS callbacks ==============================================================
#ifdef Q_SPY
//............................................................................
bool QS::onStartup(void const *arg) {
    static uint8_t qsTxBuf[2*1024]; // buffer for QS transmit channel
    static uint8_t qsRxBuf[100];    // buffer for QS receive channel

    initBuf  (qsTxBuf, sizeof(qsTxBuf));
    rxInitBuf(qsRxBuf, sizeof(qsRxBuf));

    DPP::l_uartHandle.Instance        = USART3;
    DPP::l_uartHandle.Init.BaudRate   = 115200;
    DPP::l_uartHandle.Init.WordLength = UART_WORDLENGTH_8B;
    DPP::l_uartHandle.Init.StopBits   = UART_STOPBITS_1;
    DPP::l_uartHandle.Init.Parity     = UART_PARITY_NONE;
    DPP::l_uartHandle.Init.HwFlowCtl  = UART_HWCONTROL_NONE;
    DPP::l_uartHandle.Init.Mode       = UART_MODE_TX_RX;
    DPP::l_uartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    if (HAL_UART_Init(&DPP::l_uartHandle) != HAL_OK) {
        return false; // return failure
    }

    // Set UART to receive 1 byte at a time via interrupt
    HAL_UART_Receive_IT(&DPP::l_uartHandle, (uint8_t *)qsRxBuf, 1);
    // NOTE: wait till QF::onStartup() to enable UART interrupt in NVIC

    DPP::QS_tickPeriod_ = SystemCoreClock / DPP::BSP::TICKS_PER_SEC;
    DPP::QS_tickTime_ = DPP::QS_tickPeriod_; // to start the timestamp at zero

    return true; // return success
}
//............................................................................
void QS::onCleanup(void) {
}
//............................................................................
QSTimeCtr QS::onGetTime(void) {  // NOTE: invoked with interrupts DISABLED
    if ((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) == 0U) { // not set?
        return DPP::QS_tickTime_ - static_cast<QSTimeCtr>(SysTick->VAL);
    }
    else { // the rollover occured, but the SysTick_ISR did not run yet
        return DPP::QS_tickTime_ + DPP::QS_tickPeriod_
               - static_cast<QSTimeCtr>(SysTick->VAL);
    }
}
//............................................................................
void QS::onFlush(void) {
    uint16_t b;

    QF_INT_DISABLE();
    while ((b = getByte()) != QS_EOD) { // while not End-Of-Data...
        QF_INT_ENABLE();
        // while TXE not empty
        while ((DPP::l_uartHandle.Instance->ISR & UART_FLAG_TXE) == 0U) {
        }
        DPP::l_uartHandle.Instance->TDR = (b & 0xFFU); // put into TDR
        QF_INT_DISABLE();
    }
    QF_INT_ENABLE();
}
//............................................................................
//! callback function to reset the target (to be implemented in the BSP)
void QS::onReset(void) {
    NVIC_SystemReset();
}
//............................................................................
//! callback function to execute a user command (to be implemented in BSP)
extern "C" void assert_failed(char const *module, int loc);
void QS::onCommand(uint8_t cmdId, uint32_t param1,
                   uint32_t param2, uint32_t param3)
{
    (void)cmdId;
    (void)param1;
    (void)param2;
    (void)param3;
}

#endif // Q_SPY
//----------------------------------------------------------------------------

} // namespace QP

//============================================================================
// NOTE1:
// The User LED is used to visualize the idle loop activity. The brightness
// of the LED is proportional to the frequency of invcations of the idle loop.
// Please note that the LED is toggled with interrupts locked, so no interrupt
// execution time contributes to the brightness of the User LED.
//