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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-12-28 shelton first version
*/
#include "board.h"
void system_clock_config(void)
{
/* reset crm */
crm_reset();
/* set the flash clock divider */
flash_psr_set(FLASH_WAIT_CYCLE_5);
/* enable pwc periph clock */
crm_periph_clock_enable(CRM_PWC_PERIPH_CLOCK, TRUE);
/* config ldo voltage */
pwc_ldo_output_voltage_set(PWC_LDO_OUTPUT_1V3);
crm_clock_source_enable(CRM_CLOCK_SOURCE_HEXT, TRUE);
/* wait till hext is ready */
while(crm_hext_stable_wait() == ERROR)
{
}
/* config pll clock resource */
crm_pll_config(CRM_PLL_SOURCE_HEXT, 96, 1, CRM_PLL_FP_4);
/* config pllu divider */
crm_pllu_div_set(CRM_PLL_FU_16);
/* pllu enable */
crm_pllu_output_set(TRUE);
/* enable pll */
crm_clock_source_enable(CRM_CLOCK_SOURCE_PLL, TRUE);
/* wait till pll is ready */
while(crm_flag_get(CRM_PLL_STABLE_FLAG) != SET)
{
}
/* config ahbclk */
crm_ahb_div_set(CRM_AHB_DIV_1);
/* config apb3clk */
crm_apb3_div_set(CRM_APB3_DIV_4);
/* config apb2clk */
crm_apb2_div_set(CRM_APB2_DIV_1);
/* config apb1clk */
crm_apb1_div_set(CRM_APB1_DIV_1);
/* enable auto step mode */
crm_auto_step_mode_enable(TRUE);
/* select pll as system clock source */
crm_sysclk_switch(CRM_SCLK_PLL);
/* wait till pll is used as system clock source */
while(crm_sysclk_switch_status_get() != CRM_SCLK_PLL)
{
}
/* disable auto step mode */
crm_auto_step_mode_enable(FALSE);
/* update system_core_clock global variable */
system_core_clock_update();
}
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