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|
/**************************************************************************//**
* @file clk.c
* @version V1.00
* $Revision: 35 $
* $Date: 16/03/04 3:42p $
* @brief NUC472/NUC442 CLK driver source file
*
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "NUC472_442.h"
/** @addtogroup NUC472_442_Device_Driver NUC472/NUC442 Device Driver
@{
*/
/** @addtogroup NUC472_442_CLK_Driver CLK Driver
@{
*/
/** @addtogroup NUC472_442_CLK_EXPORTED_FUNCTIONS CLK Exported Functions
@{
*/
/**
* @brief Disable frequency output function
* @return None
* @details This function disable frequency output function.
*/
void CLK_DisableCKO(void)
{
/* Disable CKO clock source */
CLK->APBCLK0 &= (~CLK_APBCLK0_CLKOCKEN_Msk);
}
/**
* @brief This function enable frequency divider module clock,
* enable frequency divider clock function and configure frequency divider.
* @param[in] u32ClkSrc is frequency divider function clock source
* - \ref CLK_CLKSEL1_CLKOSEL_HXT
* - \ref CLK_CLKSEL1_CLKOSEL_LXT
* - \ref CLK_CLKSEL1_CLKOSEL_HCLK
* - \ref CLK_CLKSEL1_CLKOSEL_HIRC
* @param[in] u32ClkDiv is system reset source
* @param[in] u32ClkDivBy1En is frequency divided by one enable.
* @return None
*
* @details Output selected clock to CKO. The output clock frequency is divided by u32ClkDiv.
* The formula is:
* CKO frequency = (Clock source frequency) / 2^(u32ClkDiv + 1)
* This function is just used to set CKO clock.
* User must enable I/O for CKO clock output pin by themselves.
*/
void CLK_EnableCKO(uint32_t u32ClkSrc, uint32_t u32ClkDiv, uint32_t u32ClkDivBy1En)
{
/* CKO = clock source / 2^(u32ClkDiv + 1) */
CLK->CLKOCTL = CLK_CLKOCTL_CLKOEN_Msk | u32ClkDiv | u32ClkDivBy1En<<CLK_CLKOCTL_DIV1EN_Pos;
/* Enable CKO clock source */
CLK->APBCLK0 |= CLK_APBCLK0_CLKOCKEN_Msk;
/* Select CKO clock source */
CLK->CLKSEL1 = (CLK->CLKSEL1 & (~CLK_CLKSEL1_CLKOSEL_Msk)) | u32ClkSrc;
}
/**
* @brief Enter to Power-down mode
* @return None
* @details This function let system enter to Power-down mode.
*/
void CLK_PowerDown(void)
{
SCB->SCR = SCB_SCR_SLEEPDEEP_Msk;
CLK->PWRCTL |= (CLK_PWRCTL_PDEN_Msk | CLK_PWRCTL_PDWKDLY_Msk );
__WFI();
}
/**
* @brief Enter to Idle mode.
* @return None
* @details This function let system enter to Idle mode.
*/
void CLK_Idle(void)
{
/* Set the processor uses sleep as its low power mode */
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
/* Set chip in idle mode because of WFI command */
CLK->PWRCTL &= ~(CLK_PWRCTL_PDEN_Msk );
/* Chip enter idle mode after CPU run WFI instruction */
__WFI();
}
/**
* @brief This function get PCLK frequency. The frequency unit is Hz.
* @return PCLK frequency
*/
uint32_t CLK_GetPCLKFreq(void)
{
SystemCoreClockUpdate();
if(CLK->CLKSEL0 & CLK_CLKSEL0_PCLKSEL_Msk)
return SystemCoreClock/2;
else
return SystemCoreClock;
}
/**
* @brief Get external high speed crystal clock frequency
* @return External high frequency crystal frequency
* @details This function get external high frequency crystal frequency. The frequency unit is Hz.
*/
uint32_t CLK_GetHXTFreq(void)
{
if(CLK->PWRCTL & CLK_PWRCTL_HXTEN_Msk )
return __HXT;
else
return 0;
}
/**
* @brief Get external low speed crystal clock frequency
* @return External low speed crystal clock frequency
* @details This function get external low frequency crystal frequency. The frequency unit is Hz.
*/
uint32_t CLK_GetLXTFreq(void)
{
if(CLK->PWRCTL & CLK_PWRCTL_LXTEN_Msk )
return __LXT;
else
return 0;
}
/**
* @brief Get HCLK frequency
* @return HCLK frequency
* @details This function get HCLK frequency. The frequency unit is Hz.
*/
uint32_t CLK_GetHCLKFreq(void)
{
SystemCoreClockUpdate();
return SystemCoreClock;
}
/**
* @brief Get CPU frequency
* @return CPU frequency
* @details This function get CPU frequency. The frequency unit is Hz.
*/
uint32_t CLK_GetCPUFreq(void)
{
SystemCoreClockUpdate();
return SystemCoreClock;
}
/**
* @brief This function get PLL frequency. The frequency unit is Hz.
* @return PLL frequency
*/
uint32_t CLK_GetPLLClockFreq(void)
{
uint32_t u32Freq =0, u32PLLSrc;
uint32_t u32NO,u32NF,u32NR,u32PllReg;
u32PllReg = CLK->PLLCTL;
if(u32PllReg & (CLK_PLLCTL_PD_Msk | CLK_PLLCTL_OE_Msk))
return 0; /* PLL is in power down mode or fix low */
if(u32PllReg & CLK_PLLCTL_PLLSRC_Msk)
u32PLLSrc = __HIRC;
else
u32PLLSrc = __HXT;
u32NO=(u32PllReg & CLK_PLLCTL_OUTDV_Msk)>>CLK_PLLCTL_OUTDV_Pos;
switch(u32NO) {
case 0:
u32NO=1;
break;
case 1:
case 2:
u32NO=2;
break;
case 3:
u32NO=4;
break;
}
u32NF = (u32PllReg & CLK_PLLCTL_FBDIV_Msk) + 2;
u32NR = ( (u32PllReg & CLK_PLLCTL_INDIV_Msk)>>CLK_PLLCTL_INDIV_Pos ) + 2;
/* u32PLLSrc is shifted 2 bits to avoid overflow */
u32Freq = (((u32PLLSrc >> 2) * u32NF) / (u32NR * u32NO) << 2);
return u32Freq;
}
/**
* @brief Set HCLK frequency
* @param[in] u32Hclk is HCLK frequency
* @return HCLK frequency
* @details This function set HCLK frequency. The frequency unit is Hz. The range of u32Hclk is 24 MHz ~ 96 MHz.
*/
uint32_t CLK_SetCoreClock(uint32_t u32Hclk)
{
uint32_t u32ClkSrc,u32NR, u32NF,u32Register;
u32ClkSrc = CLK->CLKSEL0 & CLK_CLKSEL0_HCLKSEL_Msk;
if(u32Hclk < FREQ_24MHZ)
u32Hclk =FREQ_24MHZ;
if(CLK->PWRCTL & CLK_PWRCTL_HXTEN_Msk) {
u32Register = 0<<CLK_PLLCTL_PLLSRC_Pos;
u32ClkSrc = __HXT;
} else {
u32Register = 1<<CLK_PLLCTL_PLLSRC_Pos;
u32ClkSrc = __HIRC;
}
if(u32Hclk<FREQ_50MHZ) {
u32Hclk <<=2;
u32Register |= (0x3<<CLK_PLLCTL_OUTDV_Pos);
} else {
u32Hclk <<=1;
u32Register |= (0x1<<CLK_PLLCTL_OUTDV_Pos);
}
u32NF = u32Hclk / 1000000;
u32NR = u32ClkSrc / 1000000;
while( u32NR>(0xF+2) || u32NF>(0xFF+2) ) {
u32NR = u32NR>>1;
u32NF = u32NF>>1;
}
CLK->PLLCTL = u32Register | ((u32NR - 2)<<9) | (u32NF - 2) ;
CLK_WaitClockReady(CLK_STATUS_PLLSTB_Msk);
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_PLL,CLK_CLKDIV0_HCLK(1));
/* Update System Core Clock */
SystemCoreClockUpdate();
return SystemCoreClock;
}
/**
* @brief This function set HCLK clock source and HCLK clock divider
* @param[in] u32ClkSrc is HCLK clock source. Including :
* - \ref CLK_CLKSEL0_HCLKSEL_HXT
* - \ref CLK_CLKSEL0_HCLKSEL_LXT
* - \ref CLK_CLKSEL0_HCLKSEL_PLL
* - \ref CLK_CLKSEL0_HCLKSEL_LIRC
* - \ref CLK_CLKSEL0_HCLKSEL_HIRC
* @param[in] u32ClkDiv is HCLK clock divider. Including :
* - \ref CLK_CLKDIV0_HCLK(x)
* @return None
*/
void CLK_SetHCLK(uint32_t u32ClkSrc, uint32_t u32ClkDiv)
{
CLK->CLKDIV0 = (CLK->CLKDIV0 & ~CLK_CLKDIV0_HCLKDIV_Msk) | u32ClkDiv;
CLK->CLKSEL0 = (CLK->CLKSEL0 & ~CLK_CLKSEL0_HCLKSEL_Msk) | u32ClkSrc;
SystemCoreClockUpdate();
}
/**
* @brief This function set selected module clock source and module clock divider
* @param[in] u32ModuleIdx is module index.
* @param[in] u32ClkSrc is module clock source.
* @param[in] u32ClkDiv is module clock divider.
* @return None
* @details Valid parameter combinations listed in following table:
*
* |Module index |Clock source |Divider |
* | :------------------- | :------------------------------- | :------------------------- |
* |\ref PDMA_MODULE | x | x |
* |\ref ISP_MODULE | x | x |
* |\ref EBI_MODULE | x | x |
* |\ref USBH_MODULE |\ref CLK_CLKSEL0_USBHSEL_PLL |\ref CLK_CLKDIV0_USB(x) |
* |\ref USBH_MODULE |\ref CLK_CLKSEL0_USBHSEL_PLL2 |\ref CLK_CLKDIV0_USB(x) |
* |\ref EMAC_MODULE | x |\ref CLK_CLKDIV3_EMAC(x) |
* |\ref SDH_MODULE |\ref CLK_CLKSEL0_SDHSEL_HXT |\ref CLK_CLKDIV0_SDH(x) |
* |\ref SDH_MODULE |\ref CLK_CLKSEL0_SDHSEL_PLL |\ref CLK_CLKDIV0_SDH(x) |
* |\ref SDH_MODULE |\ref CLK_CLKSEL0_SDHSEL_HCLK |\ref CLK_CLKDIV0_SDH(x) |
* |\ref SDH_MODULE |\ref CLK_CLKSEL0_SDHSEL_HIRC |\ref CLK_CLKDIV0_SDH(x) |
* |\ref CRC_MODULE | x | x |
* |\ref CAP_MODULE |\ref CLK_CLKSEL0_CAPSEL_HXT |\ref CLK_CLKDIV3_CAP(x) |
* |\ref CAP_MODULE |\ref CLK_CLKSEL0_CAPSEL_PLL2 |\ref CLK_CLKDIV3_CAP(x) |
* |\ref CAP_MODULE |\ref CLK_CLKSEL0_CAPSEL_HCLK |\ref CLK_CLKDIV3_CAP(x) |
* |\ref CAP_MODULE |\ref CLK_CLKSEL0_CAPSEL_HIRC |\ref CLK_CLKDIV3_CAP(x) |
* |\ref SEN_MODULE | x | x |
* |\ref USBD_MODULE | x | x |
* |\ref CRPT_MODULE | x | x |
* |\ref ECAP1_MODULE | x | x |
* |\ref ECAP0_MODULE | x | x |
* |\ref EADC_MODULE |\ref CLK_CLKSEL1_ADCSEL_HXT |\ref CLK_CLKDIV0_ADC(x) |
* |\ref EADC_MODULE |\ref CLK_CLKSEL1_ADCSEL_PLL |\ref CLK_CLKDIV0_ADC(x) |
* |\ref EADC_MODULE |\ref CLK_CLKSEL1_ADCSEL_PCLK |\ref CLK_CLKDIV0_ADC(x) |
* |\ref EADC_MODULE |\ref CLK_CLKSEL1_ADCSEL_HIRC |\ref CLK_CLKDIV0_ADC(x) |
* |\ref OPA_MODULE | x | x |
* |\ref QEI1_MODULE | x | x |
* |\ref QEI0_MODULE | x | x |
* |\ref PWM1CH45_MODULE |\ref CLK_CLKSEL2_PWM1CH45SEL_HXT | x |
* |\ref PWM1CH45_MODULE |\ref CLK_CLKSEL2_PWM1CH45SEL_LXT | x |
* |\ref PWM1CH45_MODULE |\ref CLK_CLKSEL2_PWM1CH45SEL_PCLK | x |
* |\ref PWM1CH45_MODULE |\ref CLK_CLKSEL2_PWM1CH45SEL_LIRC | x |
* |\ref PWM1CH45_MODULE |\ref CLK_CLKSEL2_PWM1CH45SEL_HIRC | x |
* |\ref PWM1CH23_MODULE |\ref CLK_CLKSEL2_PWM1CH23SEL_HXT | x |
* |\ref PWM1CH23_MODULE |\ref CLK_CLKSEL2_PWM1CH23SEL_LXT | x |
* |\ref PWM1CH23_MODULE |\ref CLK_CLKSEL2_PWM1CH23SEL_PCLK | x |
* |\ref PWM1CH23_MODULE |\ref CLK_CLKSEL2_PWM1CH23SEL_LIRC | x |
* |\ref PWM1CH23_MODULE |\ref CLK_CLKSEL2_PWM1CH23SEL_HIRC | x |
* |\ref PWM1CH01_MODULE |\ref CLK_CLKSEL2_PWM1CH01SEL_HXT | x |
* |\ref PWM1CH01_MODULE |\ref CLK_CLKSEL2_PWM1CH01SEL_LXT | x |
* |\ref PWM1CH01_MODULE |\ref CLK_CLKSEL2_PWM1CH01SEL_PCLK | x |
* |\ref PWM1CH01_MODULE |\ref CLK_CLKSEL2_PWM1CH01SEL_LIRC | x |
* |\ref PWM1CH01_MODULE |\ref CLK_CLKSEL2_PWM1CH01SEL_HIRC | x |
* |\ref PWM0CH45_MODULE |\ref CLK_CLKSEL2_PWM0CH45SEL_HXT | x |
* |\ref PWM0CH45_MODULE |\ref CLK_CLKSEL2_PWM0CH45SEL_LXT | x |
* |\ref PWM0CH45_MODULE |\ref CLK_CLKSEL2_PWM0CH45SEL_PCLK | x |
* |\ref PWM0CH45_MODULE |\ref CLK_CLKSEL2_PWM0CH45SEL_LIRC | x |
* |\ref PWM0CH45_MODULE |\ref CLK_CLKSEL2_PWM0CH45SEL_HIRC | x |
* |\ref PWM0CH23_MODULE |\ref CLK_CLKSEL2_PWM0CH23SEL_HXT | x |
* |\ref PWM0CH23_MODULE |\ref CLK_CLKSEL2_PWM0CH23SEL_LXT | x |
* |\ref PWM0CH23_MODULE |\ref CLK_CLKSEL2_PWM0CH23SEL_PCLK | x |
* |\ref PWM0CH23_MODULE |\ref CLK_CLKSEL2_PWM0CH23SEL_LIRC | x |
* |\ref PWM0CH23_MODULE |\ref CLK_CLKSEL2_PWM0CH23SEL_HIRC | x |
* |\ref PWM0CH01_MODULE |\ref CLK_CLKSEL2_PWM0CH01SEL_HXT | x |
* |\ref PWM0CH01_MODULE |\ref CLK_CLKSEL2_PWM0CH01SEL_LXT | x |
* |\ref PWM0CH01_MODULE |\ref CLK_CLKSEL2_PWM0CH01SEL_PCLK | x |
* |\ref PWM0CH01_MODULE |\ref CLK_CLKSEL2_PWM0CH01SEL_LIRC | x |
* |\ref PWM0CH01_MODULE |\ref CLK_CLKSEL2_PWM0CH01SEL_HIRC | x |
* |\ref I2C4_MODULE | x | x |
* |\ref SC5_MODULE | x | x |
* |\ref SC4_MODULE | x | x |
* |\ref SC3_MODULE | x | x |
* |\ref SC2_MODULE | x | x |
* |\ref SC5_MODULE |\ref CLK_CLKSEL3_SC5SEL_HXT |\ref CLK_CLKDIV2_SC5(x) |
* |\ref SC5_MODULE |\ref CLK_CLKSEL3_SC5SEL_PLL |\ref CLK_CLKDIV2_SC5(x) |
* |\ref SC5_MODULE |\ref CLK_CLKSEL3_SC5SEL_PCLK |\ref CLK_CLKDIV2_SC5(x) |
* |\ref SC5_MODULE |\ref CLK_CLKSEL3_SC5SEL_HIRC |\ref CLK_CLKDIV2_SC5(x) |
* |\ref SC4_MODULE |\ref CLK_CLKSEL3_SC4SEL_HXT |\ref CLK_CLKDIV2_SC4(x) |
* |\ref SC4_MODULE |\ref CLK_CLKSEL3_SC4SEL_PLL |\ref CLK_CLKDIV2_SC4(x) |
* |\ref SC4_MODULE |\ref CLK_CLKSEL3_SC4SEL_PCLK |\ref CLK_CLKDIV2_SC4(x) |
* |\ref SC4_MODULE |\ref CLK_CLKSEL3_SC4SEL_HIRC |\ref CLK_CLKDIV2_SC4(x) |
* |\ref SC3_MODULE |\ref CLK_CLKSEL3_SC3SEL_HXT |\ref CLK_CLKDIV1_SC3(x) |
* |\ref SC3_MODULE |\ref CLK_CLKSEL3_SC3SEL_PLL |\ref CLK_CLKDIV1_SC3(x) |
* |\ref SC3_MODULE |\ref CLK_CLKSEL3_SC3SEL_PCLK |\ref CLK_CLKDIV1_SC3(x) |
* |\ref SC3_MODULE |\ref CLK_CLKSEL3_SC3SEL_HIRC |\ref CLK_CLKDIV1_SC3(x) |
* |\ref SC2_MODULE |\ref CLK_CLKSEL3_SC2SEL_HXT |\ref CLK_CLKDIV1_SC2(x) |
* |\ref SC2_MODULE |\ref CLK_CLKSEL3_SC2SEL_PLL |\ref CLK_CLKDIV1_SC2(x) |
* |\ref SC2_MODULE |\ref CLK_CLKSEL3_SC2SEL_PCLK |\ref CLK_CLKDIV1_SC2(x) |
* |\ref SC2_MODULE |\ref CLK_CLKSEL3_SC2SEL_HIRC |\ref CLK_CLKDIV1_SC2(x) |
* |\ref SC1_MODULE |\ref CLK_CLKSEL3_SC1SEL_HXT |\ref CLK_CLKDIV1_SC1(x) |
* |\ref SC1_MODULE |\ref CLK_CLKSEL3_SC1SEL_PLL |\ref CLK_CLKDIV1_SC1(x) |
* |\ref SC1_MODULE |\ref CLK_CLKSEL3_SC1SEL_PCLK |\ref CLK_CLKDIV1_SC1(x) |
* |\ref SC1_MODULE |\ref CLK_CLKSEL3_SC1SEL_HIRC |\ref CLK_CLKDIV1_SC1(x) |
* |\ref SC0_MODULE |\ref CLK_CLKSEL3_SC0SEL_HXT |\ref CLK_CLKDIV1_SC0(x) |
* |\ref SC0_MODULE |\ref CLK_CLKSEL3_SC0SEL_PLL |\ref CLK_CLKDIV1_SC0(x) |
* |\ref SC0_MODULE |\ref CLK_CLKSEL3_SC0SEL_PCLK |\ref CLK_CLKDIV1_SC0(x) |
* |\ref SC0_MODULE |\ref CLK_CLKSEL3_SC0SEL_HIRC |\ref CLK_CLKDIV1_SC0(x) |
* |\ref PS2_MODULE |\ref CLK_CLKSEL3_I2S1SEL_HXT | x |
* |\ref I2S1_MODULE |\ref CLK_CLKSEL3_I2S1SEL_HXT | x |
* |\ref I2S1_MODULE |\ref CLK_CLKSEL3_I2S1SEL_PLL | x |
* |\ref I2S1_MODULE |\ref CLK_CLKSEL3_I2S1SEL_PCLK | x |
* |\ref I2S1_MODULE |\ref CLK_CLKSEL3_I2S1SEL_HIRC | x |
* |\ref I2S0_MODULE |\ref CLK_CLKSEL3_I2S0SEL_HXT | x |
* |\ref I2S0_MODULE |\ref CLK_CLKSEL3_I2S0SEL_PLL | x |
* |\ref I2S0_MODULE |\ref CLK_CLKSEL3_I2S0SEL_PCLK | x |
* |\ref I2S0_MODULE |\ref CLK_CLKSEL3_I2S0SEL_HIRC | x |
* |\ref ADC_MODULE |\ref CLK_CLKSEL1_ADCSEL_HXT |\ref CLK_CLKDIV0_ADC(x) |
* |\ref ADC_MODULE |\ref CLK_CLKSEL1_ADCSEL_PLL |\ref CLK_CLKDIV0_ADC(x) |
* |\ref ADC_MODULE |\ref CLK_CLKSEL1_ADCSEL_PCLK |\ref CLK_CLKDIV0_ADC(x) |
* |\ref ADC_MODULE |\ref CLK_CLKSEL1_ADCSEL_HIRC |\ref CLK_CLKDIV0_ADC(x) |
* |\ref OTG_MODULE | x | x |
* |\ref CAN1_MODULE | x | x |
* |\ref CAN0_MODULE | x | x |
* |\ref UART5_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART5_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART5_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART4_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART4_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART4_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART3_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART3_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART3_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART2_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART2_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART2_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART1_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART1_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART1_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART0_MODULE |\ref CLK_CLKSEL1_UARTSEL_HXT |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART0_MODULE |\ref CLK_CLKSEL1_UARTSEL_PLL |\ref CLK_CLKDIV0_UART(x) |
* |\ref UART0_MODULE |\ref CLK_CLKSEL1_UARTSEL_HIRC |\ref CLK_CLKDIV0_UART(x) |
* |\ref SPI3_MODULE |\ref CLK_CLKSEL1_SPI3SEL_PLL | x |
* |\ref SPI3_MODULE |\ref CLK_CLKSEL1_SPI3SEL_PCLK | x |
* |\ref SPI2_MODULE |\ref CLK_CLKSEL1_SPI2SEL_PLL | x |
* |\ref SPI2_MODULE |\ref CLK_CLKSEL1_SPI2SEL_PCLK | x |
* |\ref SPI1_MODULE |\ref CLK_CLKSEL1_SPI1SEL_PLL | x |
* |\ref SPI1_MODULE |\ref CLK_CLKSEL1_SPI1SEL_PCLK | x |
* |\ref SPI0_MODULE |\ref CLK_CLKSEL1_SPI0SEL_PLL | x |
* |\ref SPI0_MODULE |\ref CLK_CLKSEL1_SPI0SEL_PCLK | x |
* |\ref I2C3_MODULE | x | x |
* |\ref I2C2_MODULE | x | x |
* |\ref I2C1_MODULE | x | x |
* |\ref I2C0_MODULE | x | x |
* |\ref ACMP_MODULE | x | x |
* |\ref CLKO_MODULE |\ref CLK_CLKSEL1_CLKOSEL_HXT | x |
* |\ref CLKO_MODULE |\ref CLK_CLKSEL1_CLKOSEL_LXT | x |
* |\ref CLKO_MODULE |\ref CLK_CLKSEL1_CLKOSEL_HCLK | x |
* |\ref CLKO_MODULE |\ref CLK_CLKSEL1_CLKOSEL_HIRC | x |
* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_HXT | x |
* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_LXT | x |
* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_PCLK | x |
* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_LIRC | x |
* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_EXT | x |
* |\ref TMR3_MODULE |\ref CLK_CLKSEL1_TMR3SEL_HIRC | x |
* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_HXT | x |
* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_LXT | x |
* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_PCLK | x |
* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_LIRC | x |
* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_EXT | x |
* |\ref TMR2_MODULE |\ref CLK_CLKSEL1_TMR2SEL_HIRC | x |
* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_HXT | x |
* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_LXT | x |
* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_PCLK | x |
* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_LIRC | x |
* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_EXT | x |
* |\ref TMR1_MODULE |\ref CLK_CLKSEL1_TMR1SEL_HIRC | x |
* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_HXT | x |
* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_LXT | x |
* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_PCLK | x |
* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_LIRC | x |
* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_EXT | x |
* |\ref TMR0_MODULE |\ref CLK_CLKSEL1_TMR0SEL_HIRC | x |
* |\ref RTC_MODULE | x | x |
* |\ref WWDT_MODULE |\ref CLK_CLKSEL1_WWDTSEL_HCLK_DIV2048 | x |
* |\ref WWDT_MODULE |\ref CLK_CLKSEL1_WWDTSEL_LIRC | x |
* |\ref WDT_MODULE |\ref CLK_CLKSEL1_WDTSEL_LXT | x |
* |\ref WDT_MODULE |\ref CLK_CLKSEL1_WDTSEL_HCLK_DIV2048 | x |
* |\ref WDT_MODULE |\ref CLK_CLKSEL1_WDTSEL_LIRC | x |
*
*/
void CLK_SetModuleClock(uint32_t u32ModuleIdx, uint32_t u32ClkSrc, uint32_t u32ClkDiv)
{
uint32_t u32tmp=0,u32sel=0,u32div=0;
if(MODULE_CLKDIV_Msk(u32ModuleIdx)!=MODULE_NoMsk) {
u32div =(uint32_t)&CLK->CLKDIV0+((MODULE_CLKDIV(u32ModuleIdx))*4);
u32tmp = *(volatile uint32_t *)(u32div);
u32tmp = ( u32tmp & ~(MODULE_CLKDIV_Msk(u32ModuleIdx)<<MODULE_CLKDIV_Pos(u32ModuleIdx)) ) | u32ClkDiv;
*(volatile uint32_t *)(u32div) = u32tmp;
}
if(MODULE_CLKSEL_Msk(u32ModuleIdx)!=MODULE_NoMsk) {
u32sel = (uint32_t)&CLK->CLKSEL0+((MODULE_CLKSEL(u32ModuleIdx))*4);
u32tmp = *(volatile uint32_t *)(u32sel);
u32tmp = ( u32tmp & ~(MODULE_CLKSEL_Msk(u32ModuleIdx)<<MODULE_CLKSEL_Pos(u32ModuleIdx)) ) | u32ClkSrc;
*(volatile uint32_t *)(u32sel) = u32tmp;
}
}
/**
* @brief This function enable clock source
* @param 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
*/
void CLK_EnableXtalRC(uint32_t u32ClkMask)
{
CLK->PWRCTL |= u32ClkMask;
}
/**
* @brief This function disable clock source
* @param 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
*/
void CLK_DisableXtalRC(uint32_t u32ClkMask)
{
CLK->PWRCTL &= ~u32ClkMask;
}
/**
* @brief This function enable module clock
* @param[in] u32ModuleIdx is module index. Including :
* - \ref PDMA_MODULE
* - \ref ISP_MODULE
* - \ref EBI_MODULE
* - \ref USBH_MODULE
* - \ref EMAC_MODULE
* - \ref SDH_MODULE
* - \ref CRC_MODULE
* - \ref CAP_MODULE
* - \ref USBD_MODULE
* - \ref CRPT_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 ACMP_MODULE
* - \ref I2C0_MODULE
* - \ref I2C1_MODULE
* - \ref I2C2_MODULE
* - \ref I2C3_MODULE
* - \ref SPI0_MODULE
* - \ref SPI1_MODULE
* - \ref SPI2_MODULE
* - \ref SPI3_MODULE
* - \ref UART0_MODULE
* - \ref UART1_MODULE
* - \ref UART2_MODULE
* - \ref UART3_MODULE
* - \ref UART4_MODULE
* - \ref UART5_MODULE
* - \ref CAN0_MODULE
* - \ref CAN1_MODULE
* - \ref OTG_MODULE
* - \ref ADC_MODULE
* - \ref I2S0_MODULE
* - \ref I2S1_MODULE
* - \ref PS2_MODULE
* - \ref SC0_MODULE
* - \ref SC1_MODULE
* - \ref SC2_MODULE
* - \ref SC3_MODULE
* - \ref SC4_MODULE
* - \ref SC5_MODULE
* - \ref I2C4_MODULE
* - \ref PWM0CH01_MODULE
* - \ref PWM0CH23_MODULE
* - \ref PWM0CH45_MODULE
* - \ref PWM1CH01_MODULE
* - \ref PWM1CH23_MODULE
* - \ref PWM1CH45_MODULE
* - \ref QEI0_MODULE
* - \ref QEI1_MODULE
* - \ref ECAP0_MODULE
* - \ref ECAP1_MODULE
* - \ref EPWM0_MODULE
* - \ref EPWM1_MODULE
* - \ref OPA_MODULE
* - \ref EADC_MODULE
* @return None
*/
void CLK_EnableModuleClock(uint32_t u32ModuleIdx)
{
*(volatile uint32_t *)((uint32_t)&CLK->AHBCLK+(MODULE_APBCLK(u32ModuleIdx)*4)) |= 1<<MODULE_IP_EN_Pos(u32ModuleIdx);
}
/**
* @brief This function disable module clock
* @param[in] u32ModuleIdx is module index. Including :
* - \ref PDMA_MODULE
* - \ref ISP_MODULE
* - \ref EBI_MODULE
* - \ref USBH_MODULE
* - \ref EMAC_MODULE
* - \ref SDH_MODULE
* - \ref CRC_MODULE
* - \ref CAP_MODULE
* - \ref USBD_MODULE
* - \ref CRPT_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 ACMP_MODULE
* - \ref I2C0_MODULE
* - \ref I2C1_MODULE
* - \ref I2C2_MODULE
* - \ref I2C3_MODULE
* - \ref SPI0_MODULE
* - \ref SPI1_MODULE
* - \ref SPI2_MODULE
* - \ref SPI3_MODULE
* - \ref UART0_MODULE
* - \ref UART1_MODULE
* - \ref UART2_MODULE
* - \ref UART3_MODULE
* - \ref UART4_MODULE
* - \ref UART5_MODULE
* - \ref CAN0_MODULE
* - \ref CAN1_MODULE
* - \ref OTG_MODULE
* - \ref ADC_MODULE
* - \ref I2S0_MODULE
* - \ref I2S1_MODULE
* - \ref PS2_MODULE
* - \ref SC0_MODULE
* - \ref SC1_MODULE
* - \ref SC2_MODULE
* - \ref SC3_MODULE
* - \ref SC4_MODULE
* - \ref SC5_MODULE
* - \ref I2C4_MODULE
* - \ref PWM0CH01_MODULE
* - \ref PWM0CH23_MODULE
* - \ref PWM0CH45_MODULE
* - \ref PWM1CH01_MODULE
* - \ref PWM1CH23_MODULE
* - \ref PWM1CH45_MODULE
* - \ref QEI0_MODULE
* - \ref QEI1_MODULE
* - \ref ECAP0_MODULE
* - \ref ECAP1_MODULE
* - \ref EPWM0_MODULE
* - \ref EPWM1_MODULE
* - \ref OPA_MODULE
* - \ref EADC_MODULE
* @return None
*/
void CLK_DisableModuleClock(uint32_t u32ModuleIdx)
{
*(volatile uint32_t *)((uint32_t)&CLK->AHBCLK+(MODULE_APBCLK(u32ModuleIdx)*4)) &= ~(1<<MODULE_IP_EN_Pos(u32ModuleIdx));
}
/**
* @brief This function set PLL frequency
* @param[in] u32PllClkSrc is PLL clock source. Including :
* - \ref CLK_PLLCTL_PLLSRC_HIRC
* - \ref CLK_PLLCTL_PLLSRC_HXT
* @param[in] u32PllFreq is PLL frequency
* @return None
*/
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_84MHz_HXT; /* 84MHz */
else
CLK->PLLCTL = CLK_PLLCTL_50MHz_HIRC; /* 50MHz */
/* Wait for PLL clock stable */
CLK_WaitClockReady(CLK_STATUS_PLLSTB_Msk);
return CLK_GetPLLClockFreq();
}
/**
* @brief This function disable PLL
* @return None
*/
void CLK_DisablePLL(void)
{
CLK->PLLCTL |= CLK_PLLCTL_PD_Msk;
}
/**
* @brief This function set SysTick clock source
* @param[in] u32ClkSrc is SysTick 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
*/
void CLK_SetSysTickClockSrc(uint32_t u32ClkSrc)
{
CLK->CLKSEL0 = (CLK->CLKSEL0 & ~CLK_CLKSEL0_STCLKSEL_Msk) | u32ClkSrc ;
}
/**
* @brief This function execute delay function.
* @param[in] us Delay time. The Max value is 2^24 / CPU Clock(MHz). Ex:
* 50MHz => 335544us, 48MHz => 349525us, 28MHz => 699050us ...
* @return None
* @details Use the SysTick to generate the delay time and the UNIT is in us.
* The SysTick clock source is from HCLK, i.e the same as system core clock.
*/
void CLK_SysTickDelay(uint32_t us)
{
SysTick->LOAD = us * CyclesPerUs;
SysTick->VAL = (0x00);
SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk;
/* Waiting for down-count to zero */
while((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) == 0);
SysTick->CTRL = 0 ;
}
/**
* @brief This function check selected clock source status
* @param[in] u32ClkMask is selected clock source. Including
* - \ref CLK_STATUS_CLKSFAIL_Msk
* - \ref CLK_STATUS_HIRCSTB_Msk
* - \ref CLK_STATUS_LIRCSTB_Msk
* - \ref CLK_STATUS_PLLSTB_Msk
* - \ref CLK_STATUS_LXTSTB_Msk
* - \ref CLK_STATUS_HXTSTB_Msk
*
* @return 0 clock is not stable
* 1 clock is stable
*
* @details To wait for clock ready by specified CLKSTATUS bit 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 NUC472_442_CLK_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group NUC472_442_CLK_Driver */
/*@}*/ /* end of group NUC472_442_Device_Driver */
/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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