/**
******************************************************************************
* @file py32f0xx_hal_rcc_ex.c
* @author MCU Application Team
* @brief Extended RCC HAL module driver.
* This file provides firmware functions to manage the following
* functionalities RCC extended peripheral:
* + Extended Peripheral Control functions
* + Extended Clock management functions
*
******************************************************************************
* @attention
*
* © Copyright (c) Puya Semiconductor Co.
* All rights reserved.
*
* © Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "py32f0xx_hal.h"
/** @addtogroup PY32F0xx_HAL_Driver
* @{
*/
/** @defgroup RCCEx RCCEx
* @brief RCC Extended HAL module driver
* @{
*/
#ifdef HAL_RCC_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private defines -----------------------------------------------------------*/
/** @defgroup RCCEx_Private_Constants RCCEx Private Constants
* @{
*/
#define PLL_TIMEOUT_VALUE 100U /* 100 ms (minimum Tick + 1) */
#if defined(RCC_BDCR_LSCOEN)
#define LSCO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
#define LSCO_GPIO_PORT GPIOA
#define LSCO_PIN (GPIO_PIN_9 |GPIO_PIN_10)
#endif
/**
* @}
*/
/* Private macros ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup RCCEx_Exported_Functions RCCEx Exported Functions
* @{
*/
/** @defgroup RCCEx_Exported_Functions_Group1 Extended Peripheral Control functions
* @brief Extended Peripheral Control functions
*
@verbatim
===============================================================================
##### Extended Peripheral Control functions #####
===============================================================================
[..]
This subsection provides a set of functions allowing to control the RCC Clocks
frequencies.
[..]
(@) Important note: Care must be taken when @ref HAL_RCCEx_PeriphCLKConfig() is used to
select the RTC clock source; in this case the Backup domain will be reset in
order to modify the RTC Clock source, as consequence RTC registers (including
the backup registers) and RCC_BDCR register are set to their reset values.
@endverbatim
* @{
*/
/**
* @brief Initialize the RCC extended peripherals clocks according to the specified
* parameters in the @ref RCC_PeriphCLKInitTypeDef.
* @param PeriphClkInit pointer to a @ref RCC_PeriphCLKInitTypeDef structure that
* contains a field PeriphClockSelection which can be a combination of the following values:
* @arg @ref RCC_PERIPHCLK_RTC RTC peripheral clock (1)
* @arg @ref RCC_PERIPHCLK_PVD PVD peripheral clock (1)
* @arg @ref RCC_PERIPHCLK_COMP1 COMP1 peripheral clock (1)
* @arg @ref RCC_PERIPHCLK_COMP2 COMP2 peripheral clock (1)
* @arg @ref RCC_PERIPHCLK_LPTIM LPTIM peripheral clock (1)
*
* @note (1) Peripherals maybe not available on some devices
* @note Care must be taken when @ref HAL_RCCEx_PeriphCLKConfig() is used to select
* the RTC clock source: in this case the access to Backup domain is enabled.
*
* @retval HAL status
*/
HAL_StatusTypeDef HAL_RCCEx_PeriphCLKConfig(RCC_PeriphCLKInitTypeDef *PeriphClkInit)
{
#if defined(RCC_BDCR_RTCSEL)
uint32_t tickstart = 0U, temp_reg = 0U;
FlagStatus pwrclkchanged = RESET;
#endif
/* Check the parameters */
assert_param(IS_RCC_PERIPHCLOCK(PeriphClkInit->PeriphClockSelection));
#if defined(RCC_BDCR_RTCSEL)
/*------------------------------- RTC Configuration ------------------------*/
if ((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_RTC) == RCC_PERIPHCLK_RTC))
{
/* check for RTC Parameters used to output RTCCLK */
assert_param(IS_RCC_RTCCLKSOURCE(PeriphClkInit->RTCClockSelection));
/* As soon as function is called to change RTC clock source, activation of the
power domain is done. */
/* Requires to enable write access to Backup Domain of necessary */
if (__HAL_RCC_PWR_IS_CLK_DISABLED())
{
__HAL_RCC_PWR_CLK_ENABLE();
pwrclkchanged = SET;
}
if (HAL_IS_BIT_CLR(PWR->CR1, PWR_CR1_DBP))
{
/* Enable write access to Backup domain */
SET_BIT(PWR->CR1, PWR_CR1_DBP);
/* Wait for Backup domain Write protection disable */
tickstart = HAL_GetTick();
while (HAL_IS_BIT_CLR(PWR->CR1, PWR_CR1_DBP))
{
if ((HAL_GetTick() - tickstart) > RCC_DBP_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
}
/* Reset the Backup domain only if the RTC Clock source selection is modified from reset value */
temp_reg = (RCC->BDCR & RCC_BDCR_RTCSEL);
if ((temp_reg != 0x00000000U) && (temp_reg != (PeriphClkInit->RTCClockSelection & RCC_BDCR_RTCSEL)))
{
/* Store the content of BDCR register before the reset of Backup Domain */
temp_reg = (RCC->BDCR & ~(RCC_BDCR_RTCSEL));
/* RTC Clock selection can be changed only if the Backup Domain is reset */
__HAL_RCC_BACKUPRESET_FORCE();
__HAL_RCC_BACKUPRESET_RELEASE();
/* Restore the Content of BDCR register */
RCC->BDCR = temp_reg;
#if defined(RCC_LSE_SUPPORT)
/* Wait for LSERDY if LSE was enabled */
if (HAL_IS_BIT_SET(temp_reg, RCC_BDCR_LSEON))
{
/* Get Start Tick */
tickstart = HAL_GetTick();
/* Wait till LSE is ready */
while (__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET)
{
if ((HAL_GetTick() - tickstart) > RCC_LSE_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
}
#endif
}
__HAL_RCC_RTC_CONFIG(PeriphClkInit->RTCClockSelection);
/* Require to disable power clock if necessary */
if (pwrclkchanged == SET)
{
__HAL_RCC_PWR_CLK_DISABLE();
}
}
#endif /*RCC_BDCR_RTCSEL*/
#if defined(RCC_CCIPR_PVDSEL)
/*-------------------------- PVD clock source configuration -------------------*/
if (((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_PVD) == RCC_PERIPHCLK_PVD)
{
/* Check the parameters */
assert_param(IS_RCC_PVDCLKSOURCE(PeriphClkInit->PvdClockSelection));
/* Configure the PVD clock source */
__HAL_RCC_PVD_CONFIG(PeriphClkInit->PvdClockSelection);
}
#endif /* RCC_CCIPR_PVDSEL */
#if defined(RCC_CCIPR_COMP1SEL)
/*-------------------------- COMP1 clock source configuration -------------------*/
if (((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_COMP1) == RCC_PERIPHCLK_COMP1)
{
/* Check the parameters */
assert_param(IS_RCC_COMP1CLKSOURCE(PeriphClkInit->Comp1ClockSelection));
/* Configure the COMP1 clock source */
__HAL_RCC_COMP1_CONFIG(PeriphClkInit->Comp1ClockSelection);
}
#endif /* RCC_CCIPR_COMP1SEL */
#if defined(RCC_CCIPR_COMP2SEL)
/*-------------------------- COMP2 clock source configuration -------------------*/
if (((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_COMP2) == RCC_PERIPHCLK_COMP2)
{
/* Check the parameters */
assert_param(IS_RCC_COMP2CLKSOURCE(PeriphClkInit->Comp2ClockSelection));
/* Configure the COMP2 clock source */
__HAL_RCC_COMP2_CONFIG(PeriphClkInit->Comp2ClockSelection);
}
#endif /* RCC_CCIPR_COMP2SEL */
#if defined(RCC_CCIPR_LPTIMSEL)
/*-------------------------- LPTIM clock source configuration -------------------*/
if (((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_LPTIM) == (RCC_PERIPHCLK_LPTIM))
{
assert_param(IS_RCC_LPTIM1CLKSOURCE(PeriphClkInit->LptimClockSelection));
__HAL_RCC_LPTIM_CONFIG(PeriphClkInit->LptimClockSelection);
}
#endif /* RCC_CCIPR_LPTIM1SEL */
return HAL_OK;
}
/**
* @brief Get the RCC_ClkInitStruct according to the internal RCC configuration registers.
* @param PeriphClkInit pointer to an RCC_PeriphCLKInitTypeDef structure that
* returns the configuration information for the Extended Peripherals
* clocks: PVD, COMP1, COMP2, RTC, LPTIM
* @note Depending on devices and packages, some Peripherals may not be available.
* Refer to device datasheet for Peripheral availability.
* @retval None
*/
void HAL_RCCEx_GetPeriphCLKConfig(RCC_PeriphCLKInitTypeDef *PeriphClkInit)
{
/* Set all possible values for the extended clock type parameter------------*/
#if defined(PY32F002APRE)
PeriphClkInit->PeriphClockSelection = RCC_PERIPHCLK_LPTIM;
#else
PeriphClkInit->PeriphClockSelection = RCC_PERIPHCLK_COMP1 | RCC_PERIPHCLK_COMP2 | RCC_PERIPHCLK_PVD | \
RCC_PERIPHCLK_LPTIM | RCC_PERIPHCLK_RTC ;
#endif
#if defined(RCC_CCIPR_PVDSEL)
/* Get the PVD clock source ---------------------------------------------*/
PeriphClkInit->PvdClockSelection = __HAL_RCC_GET_PVD_SOURCE();
#endif /* RCC_CCIPR_PVDSEL */
#if defined(RCC_CCIPR_COMP1SEL)
/* Get the COMP1 clock source --------------------------------------------*/
PeriphClkInit->Comp1ClockSelection = __HAL_RCC_GET_COMP1_SOURCE();
#endif /* RCC_CCIPR_COMP1SEL */
#if defined(RCC_CCIPR_COMP2SEL)
/* Get the COMP2 clock source ---------------------------------------------*/
PeriphClkInit->Comp2ClockSelection = __HAL_RCC_GET_COMP2_SOURCE();
#endif /* RCC_CCIPR_COMP2SEL */
#if defined(RCC_CCIPR_LPTIMSEL)
/* Get the LPTIM clock source ---------------------------------------------*/
PeriphClkInit->LptimClockSelection = __HAL_RCC_GET_LPTIM_SOURCE();
#endif /* RCC_CCIPR_LPTIM2SEL */
#if defined(RCC_BDCR_RTCSEL)
/* Get the RTC clock source ------------------------------------------------*/
PeriphClkInit->RTCClockSelection = __HAL_RCC_GET_RTC_SOURCE();
#endif /* RCC_BDCR_RTCSEL */
}
/**
* @brief Return the peripheral clock frequency for peripherals with clock source from PLL
* @note Return 0 if peripheral clock identifier not managed by this API
* @param PeriphClk Peripheral clock identifier
* This parameter can be one of the following values:
* @arg @ref RCC_PERIPHCLK_RTC RTC peripheral clock
* @arg @ref RCC_PERIPHCLK_PVD PVD peripheral clock
* @arg @ref RCC_PERIPHCLK_COMP1 COMP1 peripheral clock
* @arg @ref RCC_PERIPHCLK_COMP2 COMP2 peripheral clock
* @arg @ref RCC_PERIPHCLK_LPTIM LPTIM peripheral clock
* @note Depending on devices and packages, some Peripherals may not be available.
* Refer to device datasheet for Peripheral availability.
* @retval Frequency in Hz
*/
uint32_t HAL_RCCEx_GetPeriphCLKFreq(uint32_t PeriphClk)
{
uint32_t frequency = 0U;
uint32_t srcclk;
#if defined(RCC_CCIPR_RNGSEL)
uint32_t rngclk;
uint32_t rngdiv;
#endif
/* Check the parameters */
assert_param(IS_RCC_PERIPHCLOCK(PeriphClk));
#if defined(RCC_BDCR_RTCSEL)
if (PeriphClk == RCC_PERIPHCLK_RTC)
{
/* Get the current RTC source */
srcclk = __HAL_RCC_GET_RTC_SOURCE();
/* Check if LSI is ready and if RTC clock selection is LSI */
if ((HAL_IS_BIT_SET(RCC->CSR, RCC_CSR_LSIRDY)) && (srcclk == RCC_RTCCLKSOURCE_LSI))
{
frequency = LSI_VALUE;
}
#if defined(RCC_LSE_SUPPORT)
/* Check if LSE is ready and if RTC clock selection is LSE */
else if ((HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSERDY)) && (srcclk == RCC_RTCCLKSOURCE_LSE))
{
frequency = LSE_VALUE;
}
#endif
/* Check if HSE is ready and if RTC clock selection is HSI_DIV32*/
else if ((HAL_IS_BIT_SET(RCC->CR, RCC_CR_HSERDY)) &&(srcclk == RCC_RTCCLKSOURCE_HSE_DIV128))
{
frequency = HSE_VALUE / 128U;
}
/* Clock not enabled for RTC*/
else
{
/* Nothing to do as frequency already initialized to 0U */
}
}
else
{
#endif
/* Other external peripheral clock source than RTC */
switch (PeriphClk)
{
#if defined(RCC_CCIPR_PVDSEL)
case RCC_PERIPHCLK_PVD:
/* Get the current PVD source */
srcclk = __HAL_RCC_GET_PVD_SOURCE();
if (srcclk == RCC_PVDCLKSOURCE_PCLK) /* PCLK1 */
{
frequency = HAL_RCC_GetPCLK1Freq();
}
#if defined(RCC_LSE_SUPPORT)
else if ((HAL_IS_BIT_SET(RCC->CSR, RCC_CSR_LSIRDY)) && (HAL_IS_BIT_CLR(RCC->BDCR, RCC_BDCR_LSCOSEL)) \
&& (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOEN)) && (srcclk == RCC_PVDCLKSOURCE_LSC))
{
frequency = LSI_VALUE;
}
else if ((HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSERDY)) && (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOSEL)) \
&& (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOEN)) && (srcclk == RCC_PVDCLKSOURCE_LSC))
{
frequency = LSE_VALUE;
}
/* Clock not enabled for PVD */
else
{
/* Nothing to do as frequency already initialized to 0U */
}
#else
else
{
frequency = LSI_VALUE;
}
#endif
break;
#endif
#if defined(RCC_CCIPR_COMP1SEL)
case RCC_PERIPHCLK_COMP1:
/* Get the current COMP1 source */
srcclk = __HAL_RCC_GET_COMP1_SOURCE();
if (srcclk == RCC_COMP1CLKSOURCE_PCLK) /* PCLK1 */
{
frequency = HAL_RCC_GetPCLK1Freq();
}
#if defined(RCC_LSE_SUPPORT)
else if ((HAL_IS_BIT_SET(RCC->CSR, RCC_CSR_LSIRDY)) && (HAL_IS_BIT_CLR(RCC->BDCR, RCC_BDCR_LSCOSEL)) \
&& (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOEN)) && (srcclk == RCC_COMP1CLKSOURCE_LSC))
{
frequency = LSI_VALUE;
}
else if ((HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSERDY)) && (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOSEL)) \
&& (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOEN)) && (srcclk == RCC_COMP1CLKSOURCE_LSC))
{
frequency = LSE_VALUE;
}
/* Clock not enabled for COMP1 */
else
{
/* Nothing to do as frequency already initialized to 0U */
}
#else
else
{
frequency = LSI_VALUE;
}
#endif
break;
#endif
#if defined(RCC_CCIPR_COMP2SEL)
case RCC_PERIPHCLK_COMP2:
/* Get the current COMP2 source */
srcclk = __HAL_RCC_GET_COMP2_SOURCE();
if (srcclk == RCC_COMP2CLKSOURCE_PCLK) /* PCLK1 */
{
frequency = HAL_RCC_GetPCLK1Freq();
}
#if defined(RCC_LSE_SUPPORT)
else if ((HAL_IS_BIT_SET(RCC->CSR, RCC_CSR_LSIRDY)) && (HAL_IS_BIT_CLR(RCC->BDCR, RCC_BDCR_LSCOSEL)) \
&& (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOEN)) && (srcclk == RCC_COMP2CLKSOURCE_LSC))
{
frequency = LSI_VALUE;
}
else if ((HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSERDY)) && (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOSEL)) \
&& (HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSCOEN)) && (srcclk == RCC_COMP2CLKSOURCE_LSC))
{
frequency = LSE_VALUE;
}
/* Clock not enabled for COMP2 */
else
{
/* Nothing to do as frequency already initialized to 0U */
}
#else
else
{
frequency = LSI_VALUE;
}
#endif
break;
#endif
#if defined(RCC_CCIPR_LPTIMSEL)
case RCC_PERIPHCLK_LPTIM:
/* Get the current LPTIM1 source */
srcclk = __HAL_RCC_GET_LPTIM_SOURCE();
if (srcclk == RCC_LPTIMCLKSOURCE_PCLK)
{
frequency = HAL_RCC_GetPCLK1Freq();
}
else if ((HAL_IS_BIT_SET(RCC->CSR, RCC_CSR_LSIRDY)) && (srcclk == RCC_LPTIMCLKSOURCE_LSI))
{
frequency = LSI_VALUE;
}
#if defined(RCC_LSE_SUPPORT)
else if ((HAL_IS_BIT_SET(RCC->BDCR, RCC_BDCR_LSERDY)) && (srcclk == RCC_LPTIMCLKSOURCE_LSE))
{
frequency = LSE_VALUE;
}
#endif
/* Clock not enabled for LPTIM1 */
else
{
/* Nothing to do as frequency already initialized to 0U */
}
break;
#endif /* RCC_CCIPR_LPTIM1SEL */
default:
break;
}
#if defined(RCC_BDCR_RTCSEL)
}
#endif
return (frequency);
}
/**
* @}
*/
/** @defgroup RCCEx_Exported_Functions_Group2 Extended Clock management functions
* @brief Extended Clock management functions
*
@verbatim
===============================================================================
##### Extended clock management functions #####
===============================================================================
[..]
This subsection provides a set of functions allowing to control the
activation or deactivation of LSE CSS, Low speed clock output and
clock after wake-up from STOP mode.
@endverbatim
* @{
*/
#if defined(RCC_BDCR_LSCOEN)
/**
* @brief Select the Low Speed clock source to output on LSCO pin (PA2).
* @param LSCOSource specifies the Low Speed clock source to output.
* This parameter can be one of the following values:
* @arg @ref RCC_LSCOSOURCE_LSI LSI clock selected as LSCO source
* @arg @ref RCC_LSCOSOURCE_LSE LSE clock selected as LSCO source
* @retval None
*/
void HAL_RCCEx_EnableLSCO(uint32_t LSCOSource)
{
FlagStatus pwrclkchanged = RESET;
FlagStatus backupchanged = RESET;
#if defined(RCC_LSE_SUPPORT)
GPIO_InitTypeDef GPIO_InitStruct;
/* Check the parameters */
assert_param(IS_RCC_LSCOSOURCE(LSCOSource));
if (LSCOSource == RCC_LSCOSOURCE_LSE)
{
/* LSCO Pin Clock Enable */
LSCO_CLK_ENABLE();
/* Configue the LSCO pin in analog mode */
GPIO_InitStruct.Pin = LSCO_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(LSCO_GPIO_PORT, &GPIO_InitStruct);
}
#endif
/* Update LSCOSEL clock source in Backup Domain control register */
if (__HAL_RCC_PWR_IS_CLK_DISABLED())
{
__HAL_RCC_PWR_CLK_ENABLE();
pwrclkchanged = SET;
}
if (HAL_IS_BIT_CLR(PWR->CR1, PWR_CR1_DBP))
{
HAL_PWR_EnableBkUpAccess();
backupchanged = SET;
}
#if defined(RCC_LSE_SUPPORT)
MODIFY_REG(RCC->BDCR, RCC_BDCR_LSCOSEL | RCC_BDCR_LSCOEN, LSCOSource | RCC_BDCR_LSCOEN);
#else
MODIFY_REG(RCC->BDCR, RCC_BDCR_LSCOEN, RCC_BDCR_LSCOEN);
#endif
if (backupchanged == SET)
{
HAL_PWR_DisableBkUpAccess();
}
if (pwrclkchanged == SET)
{
__HAL_RCC_PWR_CLK_DISABLE();
}
}
/**
* @brief Disable the Low Speed clock output.
* @retval None
*/
void HAL_RCCEx_DisableLSCO(void)
{
FlagStatus pwrclkchanged = RESET;
FlagStatus backupchanged = RESET;
/* Update LSCOEN bit in Backup Domain control register */
if (__HAL_RCC_PWR_IS_CLK_DISABLED())
{
__HAL_RCC_PWR_CLK_ENABLE();
pwrclkchanged = SET;
}
if (HAL_IS_BIT_CLR(PWR->CR1, PWR_CR1_DBP))
{
/* Enable access to the backup domain */
HAL_PWR_EnableBkUpAccess();
backupchanged = SET;
}
CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSCOEN);
/* Restore previous configuration */
if (backupchanged == SET)
{
/* Disable access to the backup domain */
HAL_PWR_DisableBkUpAccess();
}
if (pwrclkchanged == SET)
{
__HAL_RCC_PWR_CLK_DISABLE();
}
}
#endif
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* HAL_RCC_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT Puya *****END OF FILE****/