#include "stm32_common_clocks.h"

Macros
#define	STM32_CLOCK_BUS_AHB1 0x030
	Domain clocks.

#define	STM32_CLOCK_BUS_AHB2 0x034

#define	STM32_CLOCK_BUS_AHB3 0x038

#define	STM32_CLOCK_BUS_APB1 0x040

#define	STM32_CLOCK_BUS_APB2 0x044

#define	STM32_CLOCK_BUS_APB3 0x0A8

#define	STM32_PERIPH_BUS_MIN STM32_CLOCK_BUS_AHB1

#define	STM32_PERIPH_BUS_MAX STM32_CLOCK_BUS_APB3

#define	STM32_SRC_HSI (STM32_SRC_LSI + 1)
	Domain clocks.

#define	STM32_SRC_HSE (STM32_SRC_HSI + 1)

#define	STM32_SRC_PLL_P (STM32_SRC_HSE + 1)
	PLL clock outputs.

#define	STM32_SRC_PLL_Q (STM32_SRC_PLL_P + 1)

#define	STM32_SRC_PLL_R (STM32_SRC_PLL_Q + 1)

#define	STM32_SRC_PLLI2S_Q (STM32_SRC_PLL_R + 1)
	I2S sources.

#define	STM32_SRC_PLLI2S_R (STM32_SRC_PLLI2S_Q + 1)

#define	STM32_SRC_CK48 (STM32_SRC_PLLI2S_R + 1)

#define	STM32_CLOCK_REG_MASK 0xFFU

#define	STM32_CLOCK_REG_SHIFT 0U

#define	STM32_CLOCK_SHIFT_MASK 0x1FU

#define	STM32_CLOCK_SHIFT_SHIFT 8U

#define	STM32_CLOCK_MASK_MASK 0x7U

#define	STM32_CLOCK_MASK_SHIFT 13U

#define	STM32_CLOCK_VAL_MASK 0x7U

#define	STM32_CLOCK_VAL_SHIFT 16U

#define	STM32_DOMAIN_CLOCK(val, mask, shift, reg)
	STM32 clock configuration bit field.

#define	CFGR_REG 0x08
	RCC_CFGRx register offset.

#define	BDCR_REG 0x70
	RCC_BDCR register offset.

#define	I2S_SEL(val) STM32_DOMAIN_CLOCK(val, 1, 23, CFGR_REG)
	Device domain clocks selection helpers.

#define	MCO1_SEL(val) STM32_MCO_CFGR(val, 0x3, 21, CFGR_REG)

#define	MCO1_PRE(val) STM32_MCO_CFGR(val, 0x7, 24, CFGR_REG)

#define	MCO2_SEL(val) STM32_MCO_CFGR(val, 0x3, 30, CFGR_REG)

#define	MCO2_PRE(val) STM32_MCO_CFGR(val, 0x7, 27, CFGR_REG)

#define	RTC_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 8, BDCR_REG)
	BDCR devices.

#define	MCO_PRE_DIV_1 0

#define	MCO_PRE_DIV_2 4

#define	MCO_PRE_DIV_3 5

#define	MCO_PRE_DIV_4 6

#define	MCO_PRE_DIV_5 7

Macro Definition Documentation

◆ BDCR_REG

#define BDCR_REG 0x70

RCC_BDCR register offset.

◆ CFGR_REG

#define CFGR_REG 0x08

RCC_CFGRx register offset.

◆ I2S_SEL

#define I2S_SEL ( val ) STM32_DOMAIN_CLOCK(val, 1, 23, CFGR_REG)

Device domain clocks selection helpers.

CFGR devices

◆ MCO1_PRE

#define MCO1_PRE ( val ) STM32_MCO_CFGR(val, 0x7, 24, CFGR_REG)

◆ MCO1_SEL

#define MCO1_SEL ( val ) STM32_MCO_CFGR(val, 0x3, 21, CFGR_REG)

◆ MCO2_PRE

#define MCO2_PRE ( val ) STM32_MCO_CFGR(val, 0x7, 27, CFGR_REG)

◆ MCO2_SEL

#define MCO2_SEL ( val ) STM32_MCO_CFGR(val, 0x3, 30, CFGR_REG)

◆ MCO_PRE_DIV_1

#define MCO_PRE_DIV_1 0

◆ MCO_PRE_DIV_2

#define MCO_PRE_DIV_2 4

◆ MCO_PRE_DIV_3

#define MCO_PRE_DIV_3 5

◆ MCO_PRE_DIV_4

#define MCO_PRE_DIV_4 6

◆ MCO_PRE_DIV_5

#define MCO_PRE_DIV_5 7

◆ RTC_SEL

#define RTC_SEL ( val ) STM32_DOMAIN_CLOCK(val, 3, 8, BDCR_REG)

BDCR devices.

◆ STM32_CLOCK_BUS_AHB1

#define STM32_CLOCK_BUS_AHB1 0x030

Domain clocks.

Bus clocks

◆ STM32_CLOCK_BUS_AHB2

#define STM32_CLOCK_BUS_AHB2 0x034

◆ STM32_CLOCK_BUS_AHB3

#define STM32_CLOCK_BUS_AHB3 0x038

◆ STM32_CLOCK_BUS_APB1

#define STM32_CLOCK_BUS_APB1 0x040

◆ STM32_CLOCK_BUS_APB2

#define STM32_CLOCK_BUS_APB2 0x044

◆ STM32_CLOCK_BUS_APB3

#define STM32_CLOCK_BUS_APB3 0x0A8

◆ STM32_CLOCK_MASK_MASK

#define STM32_CLOCK_MASK_MASK 0x7U

◆ STM32_CLOCK_MASK_SHIFT

#define STM32_CLOCK_MASK_SHIFT 13U

◆ STM32_CLOCK_REG_MASK

#define STM32_CLOCK_REG_MASK 0xFFU

◆ STM32_CLOCK_REG_SHIFT

#define STM32_CLOCK_REG_SHIFT 0U

◆ STM32_CLOCK_SHIFT_MASK

#define STM32_CLOCK_SHIFT_MASK 0x1FU

◆ STM32_CLOCK_SHIFT_SHIFT

#define STM32_CLOCK_SHIFT_SHIFT 8U

◆ STM32_CLOCK_VAL_MASK

#define STM32_CLOCK_VAL_MASK 0x7U

◆ STM32_CLOCK_VAL_SHIFT

#define STM32_CLOCK_VAL_SHIFT 16U

◆ STM32_DOMAIN_CLOCK

#define STM32_DOMAIN_CLOCK	(	val,
		mask,
		shift,
		reg
	)

Value:

        ((((reg) & STM32_CLOCK_REG_MASK) << STM32_CLOCK_REG_SHIFT) |                               \
         (((shift) & STM32_CLOCK_SHIFT_MASK) << STM32_CLOCK_SHIFT_SHIFT) |                         \
         (((mask) & STM32_CLOCK_MASK_MASK) << STM32_CLOCK_MASK_SHIFT) |                            \
         (((val) & STM32_CLOCK_VAL_MASK) << STM32_CLOCK_VAL_SHIFT))

STM32 clock configuration bit field.

reg (1/2/3) [ 0 : 7 ]
shift (0..31) [ 8 : 12 ]
mask (0x1, 0x3, 0x7) [ 13 : 15 ]
val (0..7) [ 16 : 18 ]

Parameters

reg	RCC_CFGRx register offset
shift	Position within RCC_CFGRx.
mask	Mask for the RCC_CFGRx field.
val	Clock value (0, 1, ... 7).

◆ STM32_PERIPH_BUS_MAX

#define STM32_PERIPH_BUS_MAX STM32_CLOCK_BUS_APB3

◆ STM32_PERIPH_BUS_MIN

#define STM32_PERIPH_BUS_MIN STM32_CLOCK_BUS_AHB1

◆ STM32_SRC_CK48

#define STM32_SRC_CK48 (STM32_SRC_PLLI2S_R + 1)

◆ STM32_SRC_HSE

#define STM32_SRC_HSE (STM32_SRC_HSI + 1)

◆ STM32_SRC_HSI

#define STM32_SRC_HSI (STM32_SRC_LSI + 1)