752 lines
28 KiB
C
752 lines
28 KiB
C
/**************************************************************************//**
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* @file clk.c
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* @version V3.00
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* $Revision: 35 $
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* $Date: 15/08/11 10:26a $
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* @brief M451 series CLK driver source file
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*
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* @note
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* Copyright (C) 2014~2015 Nuvoton Technology Corp. All rights reserved.
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*****************************************************************************/
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#include "M451Series.h"
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/** @addtogroup Standard_Driver Standard Driver
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@{
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*/
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/** @addtogroup CLK_Driver CLK Driver
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@{
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*/
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/** @addtogroup CLK_EXPORTED_FUNCTIONS CLK Exported Functions
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@{
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*/
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/**
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* @brief Disable clock divider output function
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* @param None
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* @return None
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* @details This function disable clock divider output function.
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*/
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void CLK_DisableCKO(void)
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{
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/* Disable CKO clock source */
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CLK_DisableModuleClock(CLKO_MODULE);
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}
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/**
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* @brief This function enable clock divider output module clock,
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* enable clock divider output function and set frequency selection.
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* @param[in] u32ClkSrc is frequency divider function clock source. Including :
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* - \ref CLK_CLKSEL1_CLKOSEL_HXT
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* - \ref CLK_CLKSEL1_CLKOSEL_LXT
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* - \ref CLK_CLKSEL1_CLKOSEL_HCLK
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* - \ref CLK_CLKSEL1_CLKOSEL_HIRC
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* @param[in] u32ClkDiv is divider output frequency selection. It could be 0~15.
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* @param[in] u32ClkDivBy1En is clock divided by one enabled.
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* @return None
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* @details Output selected clock to CKO. The output clock frequency is divided by u32ClkDiv. \n
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* The formula is: \n
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* CKO frequency = (Clock source frequency) / 2^(u32ClkDiv + 1) \n
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* This function is just used to set CKO clock.
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* User must enable I/O for CKO clock output pin by themselves. \n
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*/
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void CLK_EnableCKO(uint32_t u32ClkSrc, uint32_t u32ClkDiv, uint32_t u32ClkDivBy1En)
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{
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/* CKO = clock source / 2^(u32ClkDiv + 1) */
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CLK->CLKOCTL = CLK_CLKOCTL_CLKOEN_Msk | u32ClkDiv | (u32ClkDivBy1En << CLK_CLKOCTL_DIV1EN_Pos);
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/* Enable CKO clock source */
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CLK_EnableModuleClock(CLKO_MODULE);
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/* Select CKO clock source */
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CLK_SetModuleClock(CLKO_MODULE, u32ClkSrc, 0);
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}
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/**
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* @brief Enter to Power-down mode
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* @param None
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* @return None
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* @details This function is used to let system enter to Power-down mode. \n
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* The register write-protection function should be disabled before using this function.
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*/
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void CLK_PowerDown(void)
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{
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/* Set the processor uses deep sleep as its low power mode */
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SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
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/* Set system Power-down enabled and Power-down entry condition */
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CLK->PWRCTL |= (CLK_PWRCTL_PDEN_Msk | CLK_PWRCTL_PDWTCPU_Msk);
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/* Chip enter Power-down mode after CPU run WFI instruction */
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__WFI();
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}
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/**
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* @brief Enter to Idle mode
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* @param None
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* @return None
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* @details This function let system enter to Idle mode. \n
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* The register write-protection function should be disabled before using this function.
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*/
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void CLK_Idle(void)
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{
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/* Set the processor uses sleep as its low power mode */
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SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
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/* Set chip in idle mode because of WFI command */
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CLK->PWRCTL &= ~CLK_PWRCTL_PDEN_Msk;
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/* Chip enter idle mode after CPU run WFI instruction */
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__WFI();
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}
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/**
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* @brief Get external high speed crystal clock frequency
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* @param None
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* @return External high frequency crystal frequency
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* @details This function get external high frequency crystal frequency. The frequency unit is Hz.
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*/
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uint32_t CLK_GetHXTFreq(void)
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{
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if(CLK->PWRCTL & CLK_PWRCTL_HXTEN_Msk)
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return __HXT;
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else
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return 0;
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}
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/**
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* @brief Get external low speed crystal clock frequency
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* @param None
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* @return External low speed crystal clock frequency
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* @details This function get external low frequency crystal frequency. The frequency unit is Hz.
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*/
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uint32_t CLK_GetLXTFreq(void)
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{
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if(CLK->PWRCTL & CLK_PWRCTL_LXTEN_Msk)
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return __LXT;
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else
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return 0;
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}
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/**
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* @brief Get PCLK0 frequency
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* @param None
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* @return PCLK0 frequency
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* @details This function get PCLK0 frequency. The frequency unit is Hz.
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*/
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uint32_t CLK_GetPCLK0Freq(void)
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{
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SystemCoreClockUpdate();
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if(CLK->CLKSEL0 & CLK_CLKSEL0_PCLK0SEL_Msk)
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return SystemCoreClock / 2;
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else
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return SystemCoreClock;
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}
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/**
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* @brief Get PCLK1 frequency
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* @param None
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* @return PCLK1 frequency
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* @details This function get PCLK1 frequency. The frequency unit is Hz.
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*/
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uint32_t CLK_GetPCLK1Freq(void)
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{
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SystemCoreClockUpdate();
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if(CLK->CLKSEL0 & CLK_CLKSEL0_PCLK1SEL_Msk)
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return SystemCoreClock / 2;
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else
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return SystemCoreClock;
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}
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/**
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* @brief Get HCLK frequency
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* @param None
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* @return HCLK frequency
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* @details This function get HCLK frequency. The frequency unit is Hz.
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*/
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uint32_t CLK_GetHCLKFreq(void)
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{
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SystemCoreClockUpdate();
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return SystemCoreClock;
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}
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/**
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* @brief Get CPU frequency
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* @param None
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* @return CPU frequency
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* @details This function get CPU frequency. The frequency unit is Hz.
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*/
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uint32_t CLK_GetCPUFreq(void)
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{
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SystemCoreClockUpdate();
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return SystemCoreClock;
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}
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/**
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* @brief Set HCLK frequency
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* @param[in] u32Hclk is HCLK frequency. The range of u32Hclk is 25 MHz ~ 72 MHz.
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* @return HCLK frequency
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* @details This function is used to set HCLK frequency. The frequency unit is Hz. \n
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* It would configure PLL frequency to 50MHz ~ 144MHz,
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* set HCLK clock divider as 2 and switch HCLK clock source to PLL. \n
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* The register write-protection function should be disabled before using this function.
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*/
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uint32_t CLK_SetCoreClock(uint32_t u32Hclk)
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{
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uint32_t u32HIRCSTB;
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/* Read HIRC clock source stable flag */
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u32HIRCSTB = CLK->STATUS & CLK_STATUS_HIRCSTB_Msk;
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/* The range of u32Hclk is 25 MHz ~ 72 MHz */
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if(u32Hclk > FREQ_72MHZ)
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u32Hclk = FREQ_72MHZ;
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if(u32Hclk < FREQ_25MHZ)
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u32Hclk = FREQ_25MHZ;
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/* Switch HCLK clock source to HIRC clock for safe */
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CLK->PWRCTL |= CLK_PWRCTL_HIRCEN_Msk;
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CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
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CLK->CLKSEL0 |= CLK_CLKSEL0_HCLKSEL_Msk;
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CLK->CLKDIV0 &= (~CLK_CLKDIV0_HCLKDIV_Msk);
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/* Configure PLL setting if HXT clock is enabled */
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if(CLK->PWRCTL & CLK_PWRCTL_HXTEN_Msk)
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u32Hclk = CLK_EnablePLL(CLK_PLLCTL_PLLSRC_HXT, (u32Hclk << 1));
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/* Configure PLL setting if HXT clock is not enabled */
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else
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{
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u32Hclk = CLK_EnablePLL(CLK_PLLCTL_PLLSRC_HIRC, (u32Hclk << 1));
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/* Read HIRC clock source stable flag */
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u32HIRCSTB = CLK->STATUS & CLK_STATUS_HIRCSTB_Msk;
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}
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/* Select HCLK clock source to PLL,
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Select HCLK clock source divider as 2
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and update system core clock
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*/
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CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_PLL, CLK_CLKDIV0_HCLK(2));
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/* Disable HIRC if HIRC is disabled before setting core clock */
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if(u32HIRCSTB == 0)
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CLK->PWRCTL &= ~CLK_PWRCTL_HIRCEN_Msk;
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/* Return actually HCLK frequency is PLL frequency divide 2 */
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return u32Hclk >> 1;
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}
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/**
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* @brief This function set HCLK clock source and HCLK clock divider
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* @param[in] u32ClkSrc is HCLK clock source. Including :
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* - \ref CLK_CLKSEL0_HCLKSEL_HXT
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* - \ref CLK_CLKSEL0_HCLKSEL_LXT
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* - \ref CLK_CLKSEL0_HCLKSEL_PLL
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* - \ref CLK_CLKSEL0_HCLKSEL_LIRC
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* - \ref CLK_CLKSEL0_HCLKSEL_HIRC
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* @param[in] u32ClkDiv is HCLK clock divider. Including :
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* - \ref CLK_CLKDIV0_HCLK(x)
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* @return None
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* @details This function set HCLK clock source and HCLK clock divider. \n
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* The register write-protection function should be disabled before using this function.
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*/
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void CLK_SetHCLK(uint32_t u32ClkSrc, uint32_t u32ClkDiv)
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{
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uint32_t u32HIRCSTB;
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/* Read HIRC clock source stable flag */
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u32HIRCSTB = CLK->STATUS & CLK_STATUS_HIRCSTB_Msk;
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/* Switch to HIRC for Safe. Avoid HCLK too high when applying new divider. */
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CLK->PWRCTL |= CLK_PWRCTL_HIRCEN_Msk;
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CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
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CLK->CLKSEL0 = (CLK->CLKSEL0 & (~CLK_CLKSEL0_HCLKSEL_Msk)) | CLK_CLKSEL0_HCLKSEL_HIRC;
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/* Apply new Divider */
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CLK->CLKDIV0 = (CLK->CLKDIV0 & (~CLK_CLKDIV0_HCLKDIV_Msk)) | u32ClkDiv;
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/* Switch HCLK to new HCLK source */
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CLK->CLKSEL0 = (CLK->CLKSEL0 & (~CLK_CLKSEL0_HCLKSEL_Msk)) | u32ClkSrc;
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/* Update System Core Clock */
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SystemCoreClockUpdate();
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/* Disable HIRC if HIRC is disabled before switching HCLK source */
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if(u32HIRCSTB == 0)
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CLK->PWRCTL &= ~CLK_PWRCTL_HIRCEN_Msk;
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}
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/**
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* @brief This function set selected module clock source and module clock divider
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* @param[in] u32ModuleIdx is module index.
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* @param[in] u32ClkSrc is module clock source.
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* @param[in] u32ClkDiv is module clock divider.
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* @return None
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* @details Valid parameter combinations listed in following table:
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*
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* |Module index |Clock source |Divider |
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* | :---------------- | :----------------------------------- | :---------------------- |
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* |\ref WDT_MODULE |\ref CLK_CLKSEL1_WDTSEL_LXT | x |
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* |\ref WDT_MODULE |\ref CLK_CLKSEL1_WDTSEL_PCLK0_DIV2048 | x |
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* |\ref WDT_MODULE |\ref CLK_CLKSEL1_WDTSEL_LIRC | x |
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* |\ref RTC_MODULE |\ref CLK_CLKSEL3_RTCSEL_LXT | x |
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* |\ref RTC_MODULE |\ref CLK_CLKSEL3_RTCSEL_LIRC | x |
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* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_HXT | x |
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* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_LXT | x |
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* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_PCLK0 | x |
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* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_EXT_TRG | x |
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* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_LIRC | x |
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* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_HIRC | x |
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* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_HXT | x |
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* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_LXT | x |
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* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_PCLK0 | x |
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* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_EXT_TRG | x |
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* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_LIRC | x |
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* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_HIRC | x |
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* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_HXT | x |
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* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_LXT | x |
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* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_PCLK1 | x |
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* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_EXT_TRG | x |
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* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_LIRC | x |
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* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_HIRC | x |
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* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_HXT | x |
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* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_LXT | x |
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* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_PCLK1 | x |
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* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_EXT_TRG | x |
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* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_LIRC | x |
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* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_HIRC | x |
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* |\ref CLKO_MODULE |\ref CLK_CLKSEL1_CLKOSEL_HXT | x |
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* |\ref CLKO_MODULE |\ref CLK_CLKSEL1_CLKOSEL_LXT | x |
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* |\ref CLKO_MODULE |\ref CLK_CLKSEL1_CLKOSEL_HCLK | x |
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* |\ref CLKO_MODULE |\ref CLK_CLKSEL1_CLKOSEL_HIRC | x |
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* |\ref SPI0_MODULE |\ref CLK_CLKSEL2_SPI0SEL_HXT | x |
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* |\ref SPI0_MODULE |\ref CLK_CLKSEL2_SPI0SEL_PLL | x |
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* |\ref SPI0_MODULE |\ref CLK_CLKSEL2_SPI0SEL_PCLK0 | x |
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* |\ref SPI0_MODULE |\ref CLK_CLKSEL2_SPI0SEL_HIRC | x |
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* |\ref SPI1_MODULE |\ref CLK_CLKSEL2_SPI1SEL_HXT | x |
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* |\ref SPI1_MODULE |\ref CLK_CLKSEL2_SPI1SEL_PLL | x |
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* |\ref SPI1_MODULE |\ref CLK_CLKSEL2_SPI1SEL_PCLK1 | x |
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* |\ref SPI1_MODULE |\ref CLK_CLKSEL2_SPI1SEL_HIRC | x |
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* |\ref SPI2_MODULE |\ref CLK_CLKSEL2_SPI2SEL_HXT | x |
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* |\ref SPI2_MODULE |\ref CLK_CLKSEL2_SPI2SEL_PLL | x |
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* |\ref SPI2_MODULE |\ref CLK_CLKSEL2_SPI2SEL_PCLK0 | x |
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* |\ref SPI2_MODULE |\ref CLK_CLKSEL2_SPI2SEL_HIRC | x |
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* |\ref UART0_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART0_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART0_MODULE |\ref CLK_CLKSEL1_UARTSEL_LXT |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART0_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART1_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART1_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART1_MODULE |\ref CLK_CLKSEL1_UARTSEL_LXT |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART1_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART2_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART2_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART2_MODULE |\ref CLK_CLKSEL1_UARTSEL_LXT |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART2_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART3_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART3_MODULE |\ref CLK_CLKSEL1_UARTSEL_LXT |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART3_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
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* |\ref UART3_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
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* |\ref USBH_MODULE | x |\ref CLK_CLKDIV0_USB(x) |
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* |\ref USBD_MODULE | x |\ref CLK_CLKDIV0_USB(x) |
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* |\ref OTG_MODULE | x |\ref CLK_CLKDIV0_USB(x) |
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* |\ref EADC_MODULE | x |\ref CLK_CLKDIV0_EADC(x) |
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* |\ref SC0_MODULE |\ref CLK_CLKSEL3_SC0SEL_HXT |\ref CLK_CLKDIV1_SC0(x) |
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* |\ref SC0_MODULE |\ref CLK_CLKSEL3_SC0SEL_PLL |\ref CLK_CLKDIV1_SC0(x) |
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* |\ref SC0_MODULE |\ref CLK_CLKSEL3_SC0SEL_PCLK0 |\ref CLK_CLKDIV1_SC0(x) |
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* |\ref SC0_MODULE |\ref CLK_CLKSEL3_SC0SEL_HIRC |\ref CLK_CLKDIV1_SC0(x) |
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* |\ref PWM0_MODULE |\ref CLK_CLKSEL2_PWM0SEL_PLL | x |
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* |\ref PWM0_MODULE |\ref CLK_CLKSEL2_PWM0SEL_PCLK0 | x |
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* |\ref PWM1_MODULE |\ref CLK_CLKSEL2_PWM1SEL_PLL | x |
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* |\ref PWM1_MODULE |\ref CLK_CLKSEL2_PWM1SEL_PCLK1 | x |
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* |\ref WWDT_MODULE |\ref CLK_CLKSEL1_WWDTSEL_PCLK0_DIV2048 | x |
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* |\ref WWDT_MODULE |\ref CLK_CLKSEL1_WWDTSEL_LIRC | x |
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*/
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void CLK_SetModuleClock(uint32_t u32ModuleIdx, uint32_t u32ClkSrc, uint32_t u32ClkDiv)
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{
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uint32_t u32sel = 0, u32div = 0;
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if(MODULE_CLKDIV_Msk(u32ModuleIdx) != MODULE_NoMsk)
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{
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/* Get clock divider control register address */
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u32div = (uint32_t)&CLK->CLKDIV0 + ((MODULE_CLKDIV(u32ModuleIdx)) * 4);
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/* Apply new divider */
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M32(u32div) = (M32(u32div) & (~(MODULE_CLKDIV_Msk(u32ModuleIdx) << MODULE_CLKDIV_Pos(u32ModuleIdx)))) | u32ClkDiv;
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}
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if(MODULE_CLKSEL_Msk(u32ModuleIdx) != MODULE_NoMsk)
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{
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/* Get clock select control register address */
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u32sel = (uint32_t)&CLK->CLKSEL0 + ((MODULE_CLKSEL(u32ModuleIdx)) * 4);
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/* Set new clock selection setting */
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M32(u32sel) = (M32(u32sel) & (~(MODULE_CLKSEL_Msk(u32ModuleIdx) << MODULE_CLKSEL_Pos(u32ModuleIdx)))) | u32ClkSrc;
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}
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Set SysTick clock source
|
|
* @param[in] u32ClkSrc is module clock source. Including:
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HXT
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_LXT
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HXT_DIV2
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HCLK_DIV2
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HIRC_DIV2
|
|
* @return None
|
|
* @details This function set SysTick clock source. \n
|
|
* The register write-protection function should be disabled before using this function.
|
|
*/
|
|
void CLK_SetSysTickClockSrc(uint32_t u32ClkSrc)
|
|
{
|
|
CLK->CLKSEL0 = (CLK->CLKSEL0 & ~CLK_CLKSEL0_STCLKSEL_Msk) | u32ClkSrc;
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief Enable clock source
|
|
* @param[in] u32ClkMask is clock source mask. Including :
|
|
* - \ref CLK_PWRCTL_HXTEN_Msk
|
|
* - \ref CLK_PWRCTL_LXTEN_Msk
|
|
* - \ref CLK_PWRCTL_HIRCEN_Msk
|
|
* - \ref CLK_PWRCTL_LIRCEN_Msk
|
|
* @return None
|
|
* @details This function enable clock source. \n
|
|
* The register write-protection function should be disabled before using this function.
|
|
*/
|
|
void CLK_EnableXtalRC(uint32_t u32ClkMask)
|
|
{
|
|
CLK->PWRCTL |= u32ClkMask;
|
|
}
|
|
|
|
/**
|
|
* @brief Disable clock source
|
|
* @param[in] u32ClkMask is clock source mask. Including :
|
|
* - \ref CLK_PWRCTL_HXTEN_Msk
|
|
* - \ref CLK_PWRCTL_LXTEN_Msk
|
|
* - \ref CLK_PWRCTL_HIRCEN_Msk
|
|
* - \ref CLK_PWRCTL_LIRCEN_Msk
|
|
* @return None
|
|
* @details This function disable clock source. \n
|
|
* The register write-protection function should be disabled before using this function.
|
|
*/
|
|
void CLK_DisableXtalRC(uint32_t u32ClkMask)
|
|
{
|
|
CLK->PWRCTL &= ~u32ClkMask;
|
|
}
|
|
|
|
/**
|
|
* @brief Enable module clock
|
|
* @param[in] u32ModuleIdx is module index. Including :
|
|
* - \ref PDMA_MODULE
|
|
* - \ref ISP_MODULE
|
|
* - \ref EBI_MODULE
|
|
* - \ref USBH_MODULE
|
|
* - \ref CRC_MODULE
|
|
* - \ref WDT_MODULE
|
|
* - \ref WWDT_MODULE
|
|
* - \ref RTC_MODULE
|
|
* - \ref TMR0_MODULE
|
|
* - \ref TMR1_MODULE
|
|
* - \ref TMR2_MODULE
|
|
* - \ref TMR3_MODULE
|
|
* - \ref CLKO_MODULE
|
|
* - \ref ACMP01_MODULE
|
|
* - \ref I2C0_MODULE
|
|
* - \ref I2C1_MODULE
|
|
* - \ref SPI0_MODULE
|
|
* - \ref SPI1_MODULE
|
|
* - \ref SPI2_MODULE
|
|
* - \ref UART0_MODULE
|
|
* - \ref UART1_MODULE
|
|
* - \ref UART2_MODULE
|
|
* - \ref UART3_MODULE
|
|
* - \ref CAN0_MODULE
|
|
* - \ref OTG_MODULE
|
|
* - \ref USBD_MODULE
|
|
* - \ref EADC_MODULE
|
|
* - \ref SC0_MODULE
|
|
* - \ref DAC_MODULE
|
|
* - \ref PWM0_MODULE
|
|
* - \ref PWM1_MODULE
|
|
* - \ref TK_MODULE
|
|
* @return None
|
|
* @details This function is used to enable module clock.
|
|
*/
|
|
void CLK_EnableModuleClock(uint32_t u32ModuleIdx)
|
|
{
|
|
*(volatile uint32_t *)((uint32_t)&CLK->AHBCLK + (MODULE_APBCLK(u32ModuleIdx) * 4)) |= 1 << MODULE_IP_EN_Pos(u32ModuleIdx);
|
|
}
|
|
|
|
/**
|
|
* @brief Disable module clock
|
|
* @param[in] u32ModuleIdx is module index. Including :
|
|
* - \ref PDMA_MODULE
|
|
* - \ref ISP_MODULE
|
|
* - \ref EBI_MODULE
|
|
* - \ref USBH_MODULE
|
|
* - \ref CRC_MODULE
|
|
* - \ref WDT_MODULE
|
|
* - \ref WWDT_MODULE
|
|
* - \ref RTC_MODULE
|
|
* - \ref TMR0_MODULE
|
|
* - \ref TMR1_MODULE
|
|
* - \ref TMR2_MODULE
|
|
* - \ref TMR3_MODULE
|
|
* - \ref CLKO_MODULE
|
|
* - \ref ACMP01_MODULE
|
|
* - \ref I2C0_MODULE
|
|
* - \ref I2C1_MODULE
|
|
* - \ref SPI0_MODULE
|
|
* - \ref SPI1_MODULE
|
|
* - \ref SPI2_MODULE
|
|
* - \ref UART0_MODULE
|
|
* - \ref UART1_MODULE
|
|
* - \ref UART2_MODULE
|
|
* - \ref UART3_MODULE
|
|
* - \ref CAN0_MODULE
|
|
* - \ref OTG_MODULE
|
|
* - \ref USBD_MODULE
|
|
* - \ref EADC_MODULE
|
|
* - \ref SC0_MODULE
|
|
* - \ref DAC_MODULE
|
|
* - \ref PWM0_MODULE
|
|
* - \ref PWM1_MODULE
|
|
* - \ref TK_MODULE
|
|
* @return None
|
|
* @details This function is used to disable module clock.
|
|
*/
|
|
void CLK_DisableModuleClock(uint32_t u32ModuleIdx)
|
|
{
|
|
*(volatile uint32_t *)((uint32_t)&CLK->AHBCLK + (MODULE_APBCLK(u32ModuleIdx) * 4)) &= ~(1 << MODULE_IP_EN_Pos(u32ModuleIdx));
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Set PLL frequency
|
|
* @param[in] u32PllClkSrc is PLL clock source. Including :
|
|
* - \ref CLK_PLLCTL_PLLSRC_HXT
|
|
* - \ref CLK_PLLCTL_PLLSRC_HIRC
|
|
* @param[in] u32PllFreq is PLL frequency.
|
|
* @return PLL frequency
|
|
* @details This function is used to configure PLLCTL register to set specified PLL frequency. \n
|
|
* The register write-protection function should be disabled before using this function.
|
|
*/
|
|
uint32_t CLK_EnablePLL(uint32_t u32PllClkSrc, uint32_t u32PllFreq)
|
|
{
|
|
uint32_t u32PllSrcClk, u32NR, u32NF, u32NO, u32CLK_SRC;
|
|
uint32_t u32Tmp, u32Tmp2, u32Tmp3, u32Min, u32MinNF, u32MinNR;
|
|
|
|
/* Disable PLL first to avoid unstable when setting PLL */
|
|
CLK_DisablePLL();
|
|
|
|
/* PLL source clock is from HXT */
|
|
if(u32PllClkSrc == CLK_PLLCTL_PLLSRC_HXT)
|
|
{
|
|
/* Enable HXT clock */
|
|
CLK->PWRCTL |= CLK_PWRCTL_HXTEN_Msk;
|
|
|
|
/* Wait for HXT clock ready */
|
|
CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
|
|
|
|
/* Select PLL source clock from HXT */
|
|
u32CLK_SRC = CLK_PLLCTL_PLLSRC_HXT;
|
|
u32PllSrcClk = __HXT;
|
|
|
|
/* u32NR start from 2 */
|
|
u32NR = 2;
|
|
}
|
|
|
|
/* PLL source clock is from HIRC */
|
|
else
|
|
{
|
|
/* Enable HIRC clock */
|
|
CLK->PWRCTL |= CLK_PWRCTL_HIRCEN_Msk;
|
|
|
|
/* Wait for HIRC clock ready */
|
|
CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
|
|
|
|
/* Select PLL source clock from HIRC */
|
|
u32CLK_SRC = CLK_PLLCTL_PLLSRC_HIRC;
|
|
u32PllSrcClk = __HIRC;
|
|
|
|
/* u32NR start from 4 when FIN = 22.1184MHz to avoid calculation overflow */
|
|
u32NR = 4;
|
|
}
|
|
|
|
/* Select "NO" according to request frequency */
|
|
if((u32PllFreq <= FREQ_500MHZ) && (u32PllFreq > FREQ_250MHZ))
|
|
{
|
|
u32NO = 0;
|
|
}
|
|
else if((u32PllFreq <= FREQ_250MHZ) && (u32PllFreq > FREQ_125MHZ))
|
|
{
|
|
u32NO = 1;
|
|
u32PllFreq = u32PllFreq << 1;
|
|
}
|
|
else if((u32PllFreq <= FREQ_125MHZ) && (u32PllFreq >= FREQ_50MHZ))
|
|
{
|
|
u32NO = 3;
|
|
u32PllFreq = u32PllFreq << 2;
|
|
}
|
|
else
|
|
{
|
|
/* Wrong frequency request. Just return default setting. */
|
|
goto lexit;
|
|
}
|
|
|
|
/* Find best solution */
|
|
u32Min = (uint32_t) - 1;
|
|
u32MinNR = 0;
|
|
u32MinNF = 0;
|
|
for(; u32NR <= 33; u32NR++)
|
|
{
|
|
u32Tmp = u32PllSrcClk / u32NR;
|
|
if((u32Tmp > 1600000) && (u32Tmp < 16000000))
|
|
{
|
|
for(u32NF = 2; u32NF <= 513; u32NF++)
|
|
{
|
|
u32Tmp2 = u32Tmp * u32NF;
|
|
if((u32Tmp2 >= 200000000) && (u32Tmp2 <= 500000000))
|
|
{
|
|
u32Tmp3 = (u32Tmp2 > u32PllFreq) ? u32Tmp2 - u32PllFreq : u32PllFreq - u32Tmp2;
|
|
if(u32Tmp3 < u32Min)
|
|
{
|
|
u32Min = u32Tmp3;
|
|
u32MinNR = u32NR;
|
|
u32MinNF = u32NF;
|
|
|
|
/* Break when get good results */
|
|
if(u32Min == 0)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Enable and apply new PLL setting. */
|
|
CLK->PLLCTL = u32CLK_SRC | (u32NO << 14) | ((u32MinNR - 2) << 9) | (u32MinNF - 2);
|
|
|
|
/* Wait for PLL clock stable */
|
|
CLK_WaitClockReady(CLK_STATUS_PLLSTB_Msk);
|
|
|
|
/* Return actual PLL output clock frequency */
|
|
return u32PllSrcClk / ((u32NO + 1) * u32MinNR) * u32MinNF;
|
|
|
|
lexit:
|
|
|
|
/* Apply default PLL setting and return */
|
|
if(u32PllClkSrc == CLK_PLLCTL_PLLSRC_HXT)
|
|
CLK->PLLCTL = CLK_PLLCTL_72MHz_HXT; /* 72MHz */
|
|
else
|
|
CLK->PLLCTL = CLK_PLLCTL_72MHz_HIRC; /* 71.8848MHz */
|
|
|
|
/* Wait for PLL clock stable */
|
|
CLK_WaitClockReady(CLK_STATUS_PLLSTB_Msk);
|
|
|
|
return CLK_GetPLLClockFreq();
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief Disable PLL
|
|
* @param None
|
|
* @return None
|
|
* @details This function set PLL in Power-down mode. \n
|
|
* The register write-protection function should be disabled before using this function.
|
|
*/
|
|
void CLK_DisablePLL(void)
|
|
{
|
|
CLK->PLLCTL |= CLK_PLLCTL_PD_Msk;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief This function check selected clock source status
|
|
* @param[in] u32ClkMask is selected clock source. Including :
|
|
* - \ref CLK_STATUS_HXTSTB_Msk
|
|
* - \ref CLK_STATUS_LXTSTB_Msk
|
|
* - \ref CLK_STATUS_HIRCSTB_Msk
|
|
* - \ref CLK_STATUS_LIRCSTB_Msk
|
|
* - \ref CLK_STATUS_PLLSTB_Msk
|
|
* @retval 0 clock is not stable
|
|
* @retval 1 clock is stable
|
|
* @details To wait for clock ready by specified clock source stable flag or timeout (~300ms)
|
|
*/
|
|
uint32_t CLK_WaitClockReady(uint32_t u32ClkMask)
|
|
{
|
|
int32_t i32TimeOutCnt = 2160000;
|
|
|
|
while((CLK->STATUS & u32ClkMask) != u32ClkMask)
|
|
{
|
|
if(i32TimeOutCnt-- <= 0)
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* @brief Enable System Tick counter
|
|
* @param[in] u32ClkSrc is System Tick clock source. Including:
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HXT
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_LXT
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HXT_DIV2
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HCLK_DIV2
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HIRC_DIV2
|
|
* - \ref CLK_CLKSEL0_STCLKSEL_HCLK
|
|
* @param[in] u32Count is System Tick reload value. It could be 0~0xFFFFFF.
|
|
* @return None
|
|
* @details This function set System Tick clock source, reload value, enable System Tick counter and interrupt. \n
|
|
* The register write-protection function should be disabled before using this function.
|
|
*/
|
|
void CLK_EnableSysTick(uint32_t u32ClkSrc, uint32_t u32Count)
|
|
{
|
|
/* Set System Tick counter disabled */
|
|
SysTick->CTRL = 0;
|
|
|
|
/* Set System Tick clock source */
|
|
if( u32ClkSrc == CLK_CLKSEL0_STCLKSEL_HCLK )
|
|
SysTick->CTRL |= SysTick_CTRL_CLKSOURCE_Msk;
|
|
else
|
|
CLK->CLKSEL0 = (CLK->CLKSEL0 & ~CLK_CLKSEL0_STCLKSEL_Msk) | u32ClkSrc;
|
|
|
|
/* Set System Tick reload value */
|
|
SysTick->LOAD = u32Count;
|
|
|
|
/* Clear System Tick current value and counter flag */
|
|
SysTick->VAL = 0;
|
|
|
|
/* Set System Tick interrupt enabled and counter enabled */
|
|
SysTick->CTRL |= SysTick_CTRL_TICKINT_Msk | SysTick_CTRL_ENABLE_Msk;
|
|
}
|
|
|
|
/**
|
|
* @brief Disable System Tick counter
|
|
* @param None
|
|
* @return None
|
|
* @details This function disable System Tick counter.
|
|
*/
|
|
void CLK_DisableSysTick(void)
|
|
{
|
|
/* Set System Tick counter disabled */
|
|
SysTick->CTRL = 0;
|
|
}
|
|
|
|
|
|
/*@}*/ /* end of group CLK_EXPORTED_FUNCTIONS */
|
|
|
|
/*@}*/ /* end of group CLK_Driver */
|
|
|
|
/*@}*/ /* end of group Standard_Driver */
|
|
|
|
/*** (C) COPYRIGHT 2014~2015 Nuvoton Technology Corp. ***/
|