HVAC_BOOT_M7/APP/Clock.c

#include "Clock.h"


/* ################################################################################## */
/* ################################### Type define ################################## */

/*   PCBA external oscillator value, these macro is user defined.                   */
/*   FOSC/SOSC clock need to manually configuration according to  PCBA XTAL value
 *   in SOSC/FOSc configuration.
 *   Current default value is the XTAL value on EVB board.                          */


/* ################################################################################## */
/* ########################### Local Prototype Functions ############################ */
static void Bsp_SCG_Init(void);

static void Bsp_PCC_Init(void);

/* ################################################################################## */
/* ################################ Local Functions ################################# */


/**
 * @brief Local SCG initial
 *
 */

//        Ядро процессора: 240 МГц
//        Системная шина: 120 МГц
//        Медленная периферия: 120 МГц
//        PLL0/PLL1: 240 МГц
//        FOSC: 24 МГц
//        SIRC: 12 МГц

static void Bsp_SCG_Init(void) {

    SCG_Deinit();

    /* Enable FOSC, frequency is 24M, DIVH=DIV1(24M), DIVM=DIV1(24M), DIVL=DIV2(12M)*/
    // FOSC - Внешний кварцевый генератор (Базовый источник 24 МГц)
    SCG_FoscType tFoscStruct =
            {
                    .bLock = false,
                    .bCm = false,
                    .bCmre = false,
                    .bSten = false,
                    .bBypass = false,
                    .eDivH = SCG_ASYNCCLOCKDIV_BY1,
                    .eDivM = SCG_ASYNCCLOCKDIV_BY1,
                    .eDivL = SCG_ASYNCCLOCKDIV_BY2,
            };
    SCG_EnableFOSC(&tFoscStruct);

    /* Enable PLL0, frequency is 240M, DIVH=DIV2(120M), DIVM=DIV2(120M), DIVL=DIV4(60M), src=FOSC*/
    /* The value of multiplier factor(FOSC/u8Prediv) between 2 ~ 4 is better*/

    // FOSC = 24 МГц
    // После предделителя: 24 МГц / (11 + 1) = 24 МГц / 12 = 2 МГц
    // После умножения: 2 МГц × (239 + 1) = 2 МГц × 240 = 480 МГц
    // После постделителя: 480 МГц / 2 = 240 МГц

    SCG_PllType tPll0Struct =
            {
                    .bLock = false,
                    .bCm = false,
                    .bCmre = false,
                    .bSten = false,
                    .eDivH = SCG_ASYNCCLOCKDIV_BY2,
                    .eDivM = SCG_ASYNCCLOCKDIV_BY2,
                    .eDivL = SCG_ASYNCCLOCKDIV_BY4,
                    .u8Prediv = 11U,
                    .ePstDiv = SCG_PLLPSTDIV_BY2,
                    .u16Mult = 239U,
                    .eSrc = SCG_PLLSOURCE_FOSC
            };
    SCG_EnablePLL(SCG_PLL0, &tPll0Struct);

    /* Enable PLL1, frequency is 240M, DIVH=DIV2(120M), DIVM=DIV2(120M), DIVL=DIV4(60M), src=FOSC*/
    /* The value of multiplier factor(FOSC/u8Prediv) between 2 ~ 4 is better*/

    // Аналогична PLL0, также 240 МГц
    // Обычно используется для периферии

    SCG_PllType tPll1Struct =
            {
                    .bLock = false,
                    .bCm = false,
                    .bCmre = false,
                    .bSten = false,
                    .eDivH = SCG_ASYNCCLOCKDIV_BY2,
                    .eDivM = SCG_ASYNCCLOCKDIV_BY2,
                    .eDivL = SCG_ASYNCCLOCKDIV_BY4,
                    .u8Prediv = 11U,
                    .ePstDiv = SCG_PLLPSTDIV_BY2,
                    .u16Mult = 239U,
                    .eSrc = SCG_PLLSOURCE_FOSC
            };
    SCG_EnablePLL(SCG_PLL1, &tPll1Struct);

    /* Enable SIRC DIV, DIVH=DIV1(12M), DIVM=DIV1(12M), DIVL=DIV2(6M) */
    // Резервный источник тактирования
    // Меньшая точность, но быстрый запуск

    SCG_SircType tSircStruct =
            {
                    .bLock = false,
                    .bCm = false,
                    .bTrEn = false,
                    .bLpen = false,
                    .bSten = false,
                    .eDivH = SCG_ASYNCCLOCKDIV_BY1,
                    .eDivM = SCG_ASYNCCLOCKDIV_BY1,
                    .eDivL = SCG_ASYNCCLOCKDIV_BY2,
                    .u8TrimSrc = 0U
            };
    SCG_SetSIRC(&tSircStruct);

    /* Set core clock source from PLL0, DIV_CORE=DIV1(240M), DIV_BUS=DIV2(120M), DIV_SLOW=DIV4(60M)*/
    // Системное тактирование

    //.eSrc = PLL0,           // Источник - PLL0 (240 МГц)
    //.eDivCore = DIV1,       // Ядро: 240 МГц
    //.eDivBus = DIV2,        // Шина: 120 МГц
    //.eDivSlow = DIV2        // Медленная периферия: 120 МГц

    SCG_ClockCtrlType tClockStruct =
            {
                    .bSysClkMonitor = false,
                    .eSrc = SCG_CLOCK_SRC_PLL0,
                    .eDivSlow = SCG_CLOCK_DIV_BY2,
                    .eDivBus = SCG_CLOCK_DIV_BY2,
                    .eDivCore = SCG_CLOCK_DIV_BY1
            };
    SCG_SetClkCtrl(&tClockStruct);

}

/**
 * @brief Local PCC Initial
 *
 */
static void Bsp_PCC_Init(void) {
    PCC_CtrlType bSP_PCC_Config;

    // UART 2
    bSP_PCC_Config.eClockName = PCC_CLK_FCUART2;
    bSP_PCC_Config.bEn = true;
    bSP_PCC_Config.eClkSrc = PCC_CLKGATE_SRC_FOSCDIV;
    bSP_PCC_Config.eDivider = PCC_CLK_UNINVOLVED;

    PCC_SetPcc(&bSP_PCC_Config);

    // DMA 0
    bSP_PCC_Config.eClockName = PCC_CLK_DMA0;
    bSP_PCC_Config.bEn = true;
    bSP_PCC_Config.eClkSrc = PCC_CLKGATE_SRC_FOSCDIV;
    bSP_PCC_Config.eDivider = PCC_CLK_UNINVOLVED;

    PCC_SetPcc(&bSP_PCC_Config);

    // DMAMUX 0
    bSP_PCC_Config.eClockName = PCC_CLK_DMAMUX0;
    bSP_PCC_Config.bEn = true;
    bSP_PCC_Config.eClkSrc = PCC_CLKGATE_SRC_FOSCDIV;
    bSP_PCC_Config.eDivider = PCC_CLK_UNINVOLVED;

    PCC_SetPcc(&bSP_PCC_Config);
}

void Bsp_Systick_Init(void)
{
    uint32_t u32ReloadVal;
    uint32_t SystemCoreClock;

    SystemCoreClock = SCG_GetScgClockFreq(SCG_CORE_CLK);
    while(SystemCoreClock == 0){};
    u32ReloadVal = SystemCoreClock / 1000;
    Core_SysTick_Config(u32ReloadVal);
    NVIC_SetPriority(SysTick_IRQn, 0);
    Core_SysTick_Enable();
}


/* ################################################################################## */
/* ################################# Global Functions ############################### */


/**
 * @brief General Clock Initial
 *
 */
void Bsp_CLOCK_Init(void) {
    CSC0_ClkoutType tCSCClkOutCfg = {0};

    /* Configure CSC(clock out configuration) */
    tCSCClkOutCfg.bEnable = true;
    tCSCClkOutCfg.eClkOutSrc = CSC0_CLKOUT_BUS_CLK;
    tCSCClkOutCfg.eDivider = CSC0_CLKOUT_DIV_BY4;

    SCG_Deinit();
    Bsp_SCG_Init();
    Bsp_PCC_Init();

    /* Set clock out */
    SCG_SetClkOut(SCG_CLOCKOUT_SRC_FOSC);
    CSC0_SetClockOut(&tCSCClkOutCfg, false);

    Bsp_Systick_Init();
}