/**************************************************************************//** * @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<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(); __DSB(); __ISB(); } /** * @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(); __DSB(); __ISB(); } /** * @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<(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)<CLKSEL0+((MODULE_CLKSEL(u32ModuleIdx))*4); u32tmp = *(volatile uint32_t *)(u32sel); u32tmp = ( u32tmp & ~(MODULE_CLKSEL_Msk(u32ModuleIdx)<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<AHBCLK+(MODULE_APBCLK(u32ModuleIdx)*4)) &= ~(1<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. ***/