rcc_priv.h File Reference

G4 RCC private/register level implementation. More...

#include <stdint.h>
#include "stm32g474xx.h"
#include "common/phal_G4/rcc/rcc.h"

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Enumerations
enum	RCC_PRIV_PLLSource_t : uint32_t { RCC_PRIV_PLL_SRC_HSI = RCC_PLLCFGR_PLLSRC_HSI , RCC_PRIV_PLL_SRC_HSE = RCC_PLLCFGR_PLLSRC_HSE }
	Oscillator source for RCC->PLLCFGR. Either HSI or HSE. More...

Functions
void	PHAL_RCC_priv_enableHSI (void)
	Enable HSI16 and block until it's ready.
void	PHAL_RCC_priv_disableHSI (void)
	Disable HSI16 and block until it's off.
void	PHAL_RCC_priv_enableHSE (void)
void	PHAL_RCC_priv_setFlashLatency (uint32_t latency_ws)
void	PHAL_RCC_priv_configurePLL (RCC_PRIV_PLLSource_t src)
void	PHAL_RCC_priv_enableBoostMode (void)
void	PHAL_RCC_priv_switchSysclkToHSI (void)
	Switch SYSCLK to HSI16 and block until the switch is confirmed.
void	PHAL_RCC_priv_switchSysclkToHSE (void)
	Switch SYSCLK to HSE and block until the switch is confirmed.
void	PHAL_RCC_priv_switchSysclkToPLL (void)
	Switch SYSCLK to the PLL and block until the switch is confirmed.
void	PHAL_RCC_priv_setBusPrescalersToDiv1 (void)
	Set the AHB, APB1, and APB2 prescalers to divide-by-1 (undivided)

Variables
static constexpr uint32_t	RCC_PRIV_HSI_CLOCK_RATE_HZ = 16'000'000U
static constexpr uint32_t	RCC_PRIV_HSE_CLOCK_RATE_HZ = 16'000'000U
static constexpr uint32_t	RCC_PRIV_PLL_M = 4U
static constexpr uint32_t	RCC_PRIV_PLL_N = 85U
static constexpr uint32_t	RCC_PRIV_PLL_R = 2U
static constexpr uint32_t	RCC_PRIV_PLL_VCO_INPUT_HZ = RCC_PRIV_HSI_CLOCK_RATE_HZ / RCC_PRIV_PLL_M
static constexpr uint32_t	RCC_PRIV_PLL_VCO_OUTPUT_HZ = RCC_PRIV_PLL_VCO_INPUT_HZ * RCC_PRIV_PLL_N
static constexpr uint32_t	RCC_PRIV_PLL_OUTPUT_HZ = RCC_PRIV_PLL_VCO_OUTPUT_HZ / RCC_PRIV_PLL_R

Detailed Description

G4 RCC private/register level implementation.

Author

Millan Kumar (kumar.nosp@m.798@.nosp@m.purdu.nosp@m.e.ed.nosp@m.u)

Enumeration Type Documentation

RCC_PRIV_PLLSource_t

enum RCC_PRIV_PLLSource_t : uint32_t

Oscillator source for RCC->PLLCFGR. Either HSI or HSE.

Enumerator
RCC_PRIV_PLL_SRC_HSI
RCC_PRIV_PLL_SRC_HSE

Function Documentation

PHAL_RCC_priv_configurePLL()

void PHAL_RCC_priv_configurePLL

(

RCC_PRIV_PLLSource_t

src

)

Configure and lock the PLL for RCC_PRIV_PLL_OUTPUT_HZ from the given source. Does not touch SYSCLK. PLL runs, unselected, until PHAL_RCC_priv_switchSysclkToPLL

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PHAL_RCC_priv_disableHSI()

void PHAL_RCC_priv_disableHSI

(

void

)

Disable HSI16 and block until it's off.

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PHAL_RCC_priv_enableBoostMode()

void PHAL_RCC_priv_enableBoostMode

(

void

)

Enable Range 1 boost mode, required before SYSCLK can exceed 150 MHz Call after the PLL is locked and before switching SYSCLK to it

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PHAL_RCC_priv_enableHSE()

void PHAL_RCC_priv_enableHSE

(

void

)

Enable HSE in bypass mode (this board feeds it an external 16 MHz signal directly, not a crystal) and block until it's ready

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PHAL_RCC_priv_enableHSI()

void PHAL_RCC_priv_enableHSI

(

void

)

Enable HSI16 and block until it's ready.

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PHAL_RCC_priv_setBusPrescalersToDiv1()

void PHAL_RCC_priv_setBusPrescalersToDiv1

(

void

)

Set the AHB, APB1, and APB2 prescalers to divide-by-1 (undivided)

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PHAL_RCC_priv_setFlashLatency()

void PHAL_RCC_priv_setFlashLatency

(

uint32_t

latency_ws

)

Set the flash wait states for the upcoming HCLK rate Safe to call before increasing the clock (more wait states than currently needed is fine)

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PHAL_RCC_priv_switchSysclkToHSE()

void PHAL_RCC_priv_switchSysclkToHSE

(

void

)

Switch SYSCLK to HSE and block until the switch is confirmed.

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PHAL_RCC_priv_switchSysclkToHSI()

void PHAL_RCC_priv_switchSysclkToHSI

(

void

)

Switch SYSCLK to HSI16 and block until the switch is confirmed.

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PHAL_RCC_priv_switchSysclkToPLL()

void PHAL_RCC_priv_switchSysclkToPLL

(

void

)

Switch SYSCLK to the PLL and block until the switch is confirmed.

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Variable Documentation

RCC_PRIV_HSE_CLOCK_RATE_HZ

uint32_t RCC_PRIV_HSE_CLOCK_RATE_HZ = 16'000'000U

staticconstexpr

RCC_PRIV_HSI_CLOCK_RATE_HZ

uint32_t RCC_PRIV_HSI_CLOCK_RATE_HZ = 16'000'000U

staticconstexpr

RCC_PRIV_PLL_M

uint32_t RCC_PRIV_PLL_M = 4U

staticconstexpr

RCC_PRIV_PLL_N

uint32_t RCC_PRIV_PLL_N = 85U

staticconstexpr

RCC_PRIV_PLL_OUTPUT_HZ

uint32_t RCC_PRIV_PLL_OUTPUT_HZ = RCC_PRIV_PLL_VCO_OUTPUT_HZ / RCC_PRIV_PLL_R

staticconstexpr

RCC_PRIV_PLL_R

uint32_t RCC_PRIV_PLL_R = 2U

staticconstexpr

RCC_PRIV_PLL_VCO_INPUT_HZ

uint32_t RCC_PRIV_PLL_VCO_INPUT_HZ = RCC_PRIV_HSI_CLOCK_RATE_HZ / RCC_PRIV_PLL_M

staticconstexpr

RCC_PRIV_PLL_VCO_OUTPUT_HZ

uint32_t RCC_PRIV_PLL_VCO_OUTPUT_HZ = RCC_PRIV_PLL_VCO_INPUT_HZ * RCC_PRIV_PLL_N

staticconstexpr