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/*
* Copyright 2018 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 TOOLS *************************************
!!GlobalInfo
product: Clocks v5.0
processor: LPC54S018
mcu_data: ksdk2_0
processor_version: 0.0.5
* BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/
#include "fsl_power.h"
#include "fsl_clock.h"
#include "clock_config.h"
/*******************************************************************************
* Definitions
******************************************************************************/
/*******************************************************************************
* Variables
******************************************************************************/
/* System clock frequency. */
extern uint32_t SystemCoreClock;
/*******************************************************************************
************************ BOARD_InitBootClocks function ************************
******************************************************************************/
void BOARD_InitBootClocks(void)
{
BOARD_BootClockRUN();
}
/*******************************************************************************
********************** Configuration BOARD_BootClockRUN ***********************
******************************************************************************/
/* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
!!Configuration
name: BOARD_BootClockRUN
called_from_default_init: true
outputs:
- {id: FRO12M_clock.outFreq, value: 12 MHz}
- {id: FROHF_clock.outFreq, value: 48 MHz}
- {id: MAIN_clock.outFreq, value: 12 MHz}
- {id: System_clock.outFreq, value: 12 MHz}
* BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/
/*******************************************************************************
* Variables for BOARD_BootClockRUN configuration
******************************************************************************/
/*******************************************************************************
* Code for BOARD_BootClockRUN configuration
******************************************************************************/
void BOARD_BootClockRUN(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(12000000U); /*!< Set voltage for the one of the fastest clock outputs: System clock output */
/*!< Set up dividers */
CLOCK_SetClkDiv(kCLOCK_DivAhbClk, 1U, false); /*!< Reset divider counter and set 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_BOOTCLOCKRUN_CORE_CLOCK;
}
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