C++ (Cpp) hw_cpm_set_sysclk Examples

Example #1

File: platform.c Project: mtornblad/openthread

static void ClkSet(sys_clk_t clock)
{
    switch (clock)
    {
    case sysclk_XTAL16M:
        if (!hw_cpm_check_xtal16m_status()) // XTAL16M disabled
        {
            hw_cpm_enable_xtal16m();        // Enable XTAL16M
        }

        hw_cpm_set_sysclk(SYS_CLK_IS_XTAL16M);  // Set XTAL16 as sys_clk
        hw_watchdog_unfreeze();                 // Start watchdog

        while (!hw_cpm_is_xtal16m_started());   // Block until XTAL16M starts

        hw_qspi_set_div(HW_QSPI_DIV_1);
        hw_watchdog_freeze();                   // Stop watchdog
        hw_cpm_set_hclk_div(0);
        hw_cpm_set_pclk_div(0);
        break;

    case sysclk_PLL48:
        if (hw_cpm_is_pll_locked() == 0)
        {
            hw_watchdog_unfreeze();         // Start watchdog
            hw_cpm_pll_sys_on();            // Turn on PLL
            hw_watchdog_freeze();           // Stop watchdog
        }

        hw_cpm_enable_pll_divider();        // Enable divider (div by 2)
        hw_qspi_set_div(HW_QSPI_DIV_1);
        hw_cpm_set_sysclk(SYS_CLK_IS_PLL);
        hw_cpm_set_hclk_div(0);
        hw_cpm_set_pclk_div(0);
        break;

    case sysclk_PLL96:
        if (hw_cpm_is_pll_locked() == 0)
        {
            hw_watchdog_unfreeze();         // Start watchdog
            hw_cpm_pll_sys_on();            // Turn on PLL
            hw_watchdog_freeze();           // Stop watchdog
        }

        hw_cpm_disable_pll_divider();       // Disable divider (div by 1)
        hw_qspi_set_div(HW_QSPI_DIV_2);
        hw_cpm_set_sysclk(SYS_CLK_IS_PLL);
        hw_cpm_set_hclk_div(0);
        hw_cpm_set_pclk_div(0);
        break;

    default:
        break;
    }
}

Example #2

File: system_ARMCM0.c Project: aeliot/openthread

/* carry out clock initialization sequence */
static void nortos_clk_setup(void)
{
    // Setup DIVN
    if (dg_configEXT_CRYSTAL_FREQ == EXT_CRYSTAL_IS_16M)
    {
        hw_cpm_set_divn(false);                 // External crystal is 16MHz
    }
    else
    {
        hw_cpm_set_divn(true);                  // External crystal is 32MHz
    }

    hw_cpm_enable_rc32k();
    hw_cpm_lp_set_rc32k();

    NVIC_ClearPendingIRQ(XTAL16RDY_IRQn);
    nortos_xtal16m_settled = false;
    NVIC_EnableIRQ(XTAL16RDY_IRQn);                 // Activate XTAL16 Ready IRQ

    hw_cpm_set_xtal16m_settling_time(dg_configXTAL16_SETTLE_TIME_RC32K);
    hw_cpm_enable_xtal16m();                        // Enable XTAL16M
    hw_watchdog_unfreeze();                         // Start watchdog

    while (!hw_cpm_is_xtal16m_started());           // Block until XTAL16M starts

    /* Wait for XTAL16M to settle */
    while (!nortos_xtal16m_settled);

    hw_watchdog_freeze();                           // Stop watchdog
    hw_cpm_set_sysclk(SYS_CLK_IS_XTAL16M);
}

Example #3

File: platform.c Project: mtornblad/openthread

void ClkInit(void)
{
    NVIC_ClearPendingIRQ(XTAL16RDY_IRQn);
    NVIC_EnableIRQ(XTAL16RDY_IRQn);                 // Activate XTAL16 Ready IRQ
    hw_cpm_set_divn(false);                         // External crystal is 16MHz
    hw_cpm_enable_rc32k();
    hw_cpm_lp_set_rc32k();
    hw_cpm_set_xtal16m_settling_time(dg_configXTAL16_SETTLE_TIME_RC32K);
    hw_cpm_enable_xtal16m();                        // Enable XTAL16M
    hw_cpm_configure_xtal32k_pins();                // Configure XTAL32K pins
    hw_cpm_configure_xtal32k();                     // Configure XTAL32K
    hw_cpm_enable_xtal32k();                        // Enable XTAL32K
    hw_watchdog_unfreeze();                         // Start watchdog

    while (!hw_cpm_is_xtal16m_started());           // Block until XTAL16M starts

    hw_watchdog_freeze();                           // Stop watchdog
    hw_cpm_set_recharge_period((uint16_t)dg_configSET_RECHARGE_PERIOD);
    hw_cpm_set_sysclk(SYS_CLK_IS_XTAL16M);
    hw_cpm_set_hclk_div(0);
    hw_cpm_set_pclk_div(0);
    hw_otpc_init();
    hw_otpc_set_speed(HW_OTPC_SYS_CLK_FREQ_16);
}