Private Functions

Collaboration diagram for Private Functions:

Functions
static void	I2C4_MspDeInit (I2C_HandleTypeDef *phi2c)
	DeInitializes I2C MSP. More...
static void	I2C4_MspInit (I2C_HandleTypeDef *phi2c)
	Initializes I2C MSP. More...
static int32_t	I2C4_ReadReg (uint16_t DevAddr, uint16_t Reg, uint16_t MemAddSize, uint8_t *pData, uint16_t Length)
	Read a register of the device through BUS. More...
static int32_t	I2C4_WriteReg (uint16_t DevAddr, uint16_t Reg, uint16_t MemAddSize, uint8_t *pData, uint16_t Length)
	Write a value in a register of the device through BUS. More...
static void	I2C_Compute_PRESC_SCLDEL_SDADEL (uint32_t clock_src_freq, uint32_t I2C_speed)
	Compute PRESC, SCLDEL and SDADEL. More...
static uint32_t	I2C_Compute_SCLL_SCLH (uint32_t clock_src_freq, uint32_t I2C_speed)
	Calculate SCLL and SCLH and find best configuration. More...
static uint32_t	I2C_GetTiming (uint32_t clock_src_freq, uint32_t i2c_freq)
	Compute I2C timing according current I2C clock source and required I2C clock. More...

Detailed Description

Function Documentation

I2C4_MspDeInit()

static void I2C4_MspDeInit ( I2C_HandleTypeDef *  phi2c )

static

DeInitializes I2C MSP.

Parameters

phi2c

I2C handler

Return values

None

Definition at line 814 of file stm32h747i_discovery_bus.c.

I2C4_MspInit()

static void I2C4_MspInit ( I2C_HandleTypeDef *  phi2c )

static

Initializes I2C MSP.

Parameters

phi2c

I2C handler

Return values

None

Definition at line 769 of file stm32h747i_discovery_bus.c.

I2C4_ReadReg()

static int32_t I2C4_ReadReg ( uint16_t  DevAddr, uint16_t  Reg, uint16_t  MemAddSize, uint8_t *  pData, uint16_t  Length  )

static

Read a register of the device through BUS.

Parameters

DevAddr	Device address on BUS
MemAddSize	Size of internal memory address
Reg	The target register address to read
pData	The target register value to be read
Length	data length in bytes

Return values

BSP

status

Definition at line 859 of file stm32h747i_discovery_bus.c.

I2C4_WriteReg()

static int32_t I2C4_WriteReg ( uint16_t  DevAddr, uint16_t  Reg, uint16_t  MemAddSize, uint8_t *  pData, uint16_t  Length  )

static

Write a value in a register of the device through BUS.

Parameters

DevAddr	Device address on Bus.
MemAddSize	Size of internal memory address
Reg	The target register address to write
pData	The target register value to be written
Length	data length in bytes

Return values

BSP

status

Definition at line 840 of file stm32h747i_discovery_bus.c.

I2C_Compute_PRESC_SCLDEL_SDADEL()

static void I2C_Compute_PRESC_SCLDEL_SDADEL ( uint32_t  clock_src_freq, uint32_t  I2C_speed  )

static

Compute PRESC, SCLDEL and SDADEL.

Parameters

clock_src_freq	I2C source clock in HZ.
I2C_speed	I2C frequency (index).

Return values

None.

Definition at line 610 of file stm32h747i_discovery_bus.c.

I2C_Compute_SCLL_SCLH()

static uint32_t I2C_Compute_SCLL_SCLH ( uint32_t  clock_src_freq, uint32_t  I2C_speed  )

static

Calculate SCLL and SCLH and find best configuration.

Parameters

clock_src_freq	I2C source clock in HZ.
I2C_speed	I2C frequency (index).

Return values

config

index (0 to I2C_VALID_TIMING_NBR], 0xFFFFFFFF for no valid config.

Definition at line 691 of file stm32h747i_discovery_bus.c.

I2C_GetTiming()

static uint32_t I2C_GetTiming ( uint32_t  clock_src_freq, uint32_t  i2c_freq  )

static

Compute I2C timing according current I2C clock source and required I2C clock.

Parameters

clock_src_freq	I2C clock source in Hz.
i2c_freq	Required I2C clock in Hz.

Return values

I2C	timing or 0 in case of error.

Definition at line 572 of file stm32h747i_discovery_bus.c.