clock_config.c

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/*
 * Copyright (c) 2015, Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 * All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

/*
 * How to set up clock using clock driver functions:
 *
 * 1. Setup clock sources.
 *
 * 2. Setup voltage for the fastest of the clock outputs
 *
 * 3. Set up wait states of the flash.
 *
 * 4. Set up all dividers.
 *
 * 5. Set up all selectors to provide selected clocks.
 */

/* TEXT BELOW IS USED AS SETTING FOR THE CLOCKS TOOL *****************************
!!ClocksProfile
product: Clocks v1.0
processor: LPC54114J256
package_id: LPC54114J256BD64
mcu_data: ksdk2_0
processor_version: 1.1.0
board: LPCXpresso54114
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR THE CLOCKS TOOL **/

#include "fsl_power.h"
#include "fsl_clock.h"
#include "clock_config.h"

/*******************************************************************************
 * Definitions
 ******************************************************************************/

/*******************************************************************************
 * Variables
 ******************************************************************************/
/* System clock frequency. */
extern uint32_t SystemCoreClock;

/*******************************************************************************
 ********************* Configuration BOARD_BootClockFRO12M ***********************
 ******************************************************************************/
/* TEXT BELOW IS USED AS SETTING FOR THE CLOCKS TOOL *****************************
!!Configuration
name: BOARD_BootClockFRO12M
outputs:
- {id: System_clock.outFreq, value: 12 MHz}
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR THE CLOCKS TOOL **/

/*******************************************************************************
 * Variables for BOARD_BootClockFRO12M configuration
 ******************************************************************************/
/*******************************************************************************
 * Code for BOARD_BootClockFRO12M configuration
 ******************************************************************************/
void BOARD_BootClockFRO12M(void)
{
    /*!< Set up the clock sources */
    /*!< Set up FRO */
    POWER_DisablePD(kPDRUNCFG_PD_FRO_EN);                   /*!< Ensure FRO is on  */
    CLOCK_AttachClk(kFRO12M_to_MAIN_CLK);                  /*!< Switch to FRO 12MHz first to ensure we can change voltage without accidentally
                                                                being below the voltage for current speed */
    CLOCK_SetupFROClocking(12000000U);                    /*!< Set up FRO to the 12 MHz, just for sure */
    POWER_SetVoltageForFreq(12000000U);             /*!< Set voltage for the one of the fastest clock outputs: System clock output */
    CLOCK_SetFLASHAccessCyclesForFreq(12000000U);   /*!< Set FLASH wait states for core */

    /*!< Set up dividers */
    CLOCK_SetClkDiv(kCLOCK_DivAhbClk, 1U, false);                  /*!< Set AHBCLKDIV divider to value 1 */

    /*!< Set up clock selectors - Attach clocks to the peripheries */
    CLOCK_AttachClk(kFRO12M_to_MAIN_CLK);                  /*!< Switch MAIN_CLK to FRO12M */
    /*!< Set SystemCoreClock variable. */
    SystemCoreClock = BOARD_BOOTCLOCKFRO12M_CORE_CLOCK;
}

/*******************************************************************************
 ********************** Configuration BOARD_BootClockFROHF48M ***********************
 ******************************************************************************/
/* TEXT BELOW IS USED AS SETTING FOR THE CLOCKS TOOL *****************************
!!Configuration
name: BOARD_BootClockFROHF48M
outputs:
- {id: System_clock.outFreq, value: 48 MHz}
settings:
- {id: SYSCON.MAINCLKSELA.sel, value: SYSCON.fro_hf}
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR THE CLOCKS TOOL **/

/*******************************************************************************
 * Variables for BOARD_BootClockFROHF48M configuration
 ******************************************************************************/
/*******************************************************************************
 * Code for BOARD_BootClockFROHF48M configuration
 ******************************************************************************/
void BOARD_BootClockFROHF48M(void)
{
    /*!< Set up the clock sources */
    /*!< Set up FRO */
    POWER_DisablePD(kPDRUNCFG_PD_FRO_EN);                   /*!< Ensure FRO is on  */
    CLOCK_AttachClk(kFRO12M_to_MAIN_CLK);                  /*!< Switch to FRO 12MHz first to ensure we can change voltage without accidentally
                                                                being below the voltage for current speed */
    POWER_SetVoltageForFreq(48000000U);             /*!< Set voltage for the one of the fastest clock outputs: System clock output */
    CLOCK_SetFLASHAccessCyclesForFreq(48000000U);   /*!< Set FLASH wait states for core */

    CLOCK_SetupFROClocking(48000000U);              /*!< Set up high frequency FRO output to selected frequency */

    /*!< Set up dividers */
    CLOCK_SetClkDiv(kCLOCK_DivAhbClk, 1U, false);                  /*!< Set AHBCLKDIV divider to value 1 */

    /*!< Set up clock selectors - Attach clocks to the peripheries */
    CLOCK_AttachClk(kFRO_HF_to_MAIN_CLK);                  /*!< Switch MAIN_CLK to FRO_HF */
    /*!< Set SystemCoreClock variable. */
    SystemCoreClock = BOARD_BOOTCLOCKFROHF48M_CORE_CLOCK;
}

/*******************************************************************************
 ********************* Configuration BOARD_BootClockFROHF96M **********************
 ******************************************************************************/
/* TEXT BELOW IS USED AS SETTING FOR THE CLOCKS TOOL *****************************
!!Configuration
name: BOARD_BootClockFROHF96M
outputs:
- {id: System_clock.outFreq, value: 96 MHz}
settings:
- {id: SYSCON.MAINCLKSELA.sel, value: SYSCON.fro_hf}
sources:
- {id: SYSCON.fro_hf.outFreq, value: 96 MHz}
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR THE CLOCKS TOOL **/

/*******************************************************************************
 * Variables for BOARD_BootClockFROHF96M configuration
 ******************************************************************************/
/*******************************************************************************
 * Code for BOARD_BootClockFROHF96M configuration
 ******************************************************************************/
void BOARD_BootClockFROHF96M(void)
{
    /*!< Set up the clock sources */
    /*!< Set up FRO */
    POWER_DisablePD(kPDRUNCFG_PD_FRO_EN);                   /*!< Ensure FRO is on  */
    CLOCK_AttachClk(kFRO12M_to_MAIN_CLK);                  /*!< Switch to FRO 12MHz first to ensure we can change voltage without accidentally
                                                                being below the voltage for current speed */
    POWER_SetVoltageForFreq(96000000U);             /*!< Set voltage for the one of the fastest clock outputs: System clock output */
    CLOCK_SetFLASHAccessCyclesForFreq(96000000U);   /*!< Set FLASH wait states for core */

    CLOCK_SetupFROClocking(96000000U);              /*!< Set up high frequency FRO output to selected frequency */

    /*!< Set up dividers */
    CLOCK_SetClkDiv(kCLOCK_DivAhbClk, 1U, false);                  /*!< Set AHBCLKDIV divider to value 1 */

    /*!< Set up clock selectors - Attach clocks to the peripheries */
    CLOCK_AttachClk(kFRO_HF_to_MAIN_CLK);                  /*!< Switch MAIN_CLK to FRO_HF */
    /*!< Set SystemCoreClock variable. */
    SystemCoreClock = BOARD_BOOTCLOCKFROHF96M_CORE_CLOCK;
}