DMA_Management

Functions
__STATIC_INLINE void	ll_i2c_enable_dma_req_tx (i2c_regs_t *I2Cx)
	Enable DMA transmission requests. More...
__STATIC_INLINE void	ll_i2c_disable_dma_req_tx (i2c_regs_t *I2Cx)
	Disable DMA transmission requests. More...
__STATIC_INLINE uint32_t	ll_i2c_is_enabled_dma_req_tx (i2c_regs_t *I2Cx)
	Check if DMA transmission requests are enabled or disabled. More...
__STATIC_INLINE void	ll_i2c_enable_dma_req_rx (i2c_regs_t *I2Cx)
	Enable DMA reception requests. More...
__STATIC_INLINE void	ll_i2c_disable_dma_req_rx (i2c_regs_t *I2Cx)
	Disable DMA reception requests. More...
__STATIC_INLINE uint32_t	ll_i2c_is_enabled_dma_req_rx (i2c_regs_t *I2Cx)
	Check if DMA reception requests are enabled or disabled. More...
__STATIC_INLINE void	ll_i2c_set_dma_tx_data_level (i2c_regs_t *I2Cx, uint32_t level)
	Set level of TX FIFO that requests a DMA transmit. More...
__STATIC_INLINE uint32_t	ll_i2c_get_dma_tx_data_level (i2c_regs_t *I2Cx)
	Get level of TX FIFO that request a DMA transmit. More...
__STATIC_INLINE void	ll_i2c_set_dma_rx_data_level (i2c_regs_t *I2Cx, uint32_t level)
	Set level of RX FIFO that requests a DMA receive. More...
__STATIC_INLINE uint32_t	ll_i2c_get_dma_rx_data_level (i2c_regs_t *I2Cx)
	Get level of RX FIFO that request a DMA receive. More...
__STATIC_INLINE uint32_t	ll_i2c_dma_get_register_address (i2c_regs_t *I2Cx)
	Get the data register address used for DMA transfer. More...

Detailed Description

Function Documentation

ll_i2c_disable_dma_req_rx()

__STATIC_INLINE void ll_i2c_disable_dma_req_rx

(

i2c_regs_t *

I2Cx

)

Disable DMA reception requests.

Register	BitsName
IC_DMA_CR	RDMAE

Parameters

I2Cx	I2C instance.

Return values

None.

ll_i2c_disable_dma_req_tx()

__STATIC_INLINE void ll_i2c_disable_dma_req_tx

(

i2c_regs_t *

I2Cx

)

Disable DMA transmission requests.

Register	BitsName
IC_DMA_CR	TDMAE

Parameters

I2Cx	I2C instance.

Return values

None.

ll_i2c_dma_get_register_address()

__STATIC_INLINE uint32_t ll_i2c_dma_get_register_address

(

i2c_regs_t *

I2Cx

)

Get the data register address used for DMA transfer.

Register	BitsName
IC_DATA_CMD	DAT

Parameters

I2Cx	I2C instance

Return values

Address

of data register

ll_i2c_enable_dma_req_rx()

__STATIC_INLINE void ll_i2c_enable_dma_req_rx

(

i2c_regs_t *

I2Cx

)

Enable DMA reception requests.

Register	BitsName
IC_DMA_CR	RDMAE

Parameters

I2Cx	I2C instance.

Return values

None.

ll_i2c_enable_dma_req_tx()

__STATIC_INLINE void ll_i2c_enable_dma_req_tx

(

i2c_regs_t *

I2Cx

)

Enable DMA transmission requests.

Register	BitsName
IC_DMA_CR	TDMAE

Return values

Value	range between 0 ~ 0x8.
None.

ll_i2c_get_dma_rx_data_level()

__STATIC_INLINE uint32_t ll_i2c_get_dma_rx_data_level

(

i2c_regs_t *

I2Cx

)

Get level of RX FIFO that request a DMA receive.

Register	BitsName
IC_DMA_RDLR	DMARDL

Parameters

I2Cx	I2C instance

Return values

Returned

value should range between 0x0 and 0x8.

ll_i2c_get_dma_tx_data_level()

__STATIC_INLINE uint32_t ll_i2c_get_dma_tx_data_level

(

i2c_regs_t *

I2Cx

)

Get level of TX FIFO that request a DMA transmit.

Register	BitsName
IC_DMA_TDLR	DMATDL

Parameters

I2Cx	I2C instance

Return values

Returned

value should range between 0x0 and 0x8.

ll_i2c_is_enabled_dma_req_rx()

__STATIC_INLINE uint32_t ll_i2c_is_enabled_dma_req_rx

(

i2c_regs_t *

I2Cx

)

Check if DMA reception requests are enabled or disabled.

Register	BitsName
IC_DMA_CR	RDMAE

Parameters

I2Cx	I2C instance.

Return values

State

of bit (1 or 0).

ll_i2c_is_enabled_dma_req_tx()

__STATIC_INLINE uint32_t ll_i2c_is_enabled_dma_req_tx

(

i2c_regs_t *

I2Cx

)

Check if DMA transmission requests are enabled or disabled.

Register	BitsName
IC_DMA_CR	TDMAE

Parameters

I2Cx	I2C instance.

Return values

State

of bit (1 or 0).

ll_i2c_set_dma_rx_data_level()

__STATIC_INLINE void ll_i2c_set_dma_rx_data_level	(	i2c_regs_t *	I2Cx,
		uint32_t	level
	)

Set level of RX FIFO that requests a DMA receive.

Note

The watermark level = DMARDL + 1, that is, dma_rx_req is generated when the number of valid data entries in the receive FIFO is equal to or more than this field value + 1, and RDMAE = 1. For instance, when DMARDL is 0, then dma_rx_req is asserted when 1 or more data entries are present in the receive FIFO.

Register	BitsName
IC_DMA_RDLR	DMARDL

Parameters

I2Cx	I2C instance
level	This parameter should range between 0x0 and 0x8.

Return values

None.

ll_i2c_set_dma_tx_data_level()

__STATIC_INLINE void ll_i2c_set_dma_tx_data_level	(	i2c_regs_t *	I2Cx,
		uint32_t	level
	)

Set level of TX FIFO that requests a DMA transmit.

Note

TX data level should equal to the watermark level, that is, the dma_tx_req signal is generated when the number of valid data entries in the transmit FIFO is equal to or below this field value, and TDMAE = 1.

Register	BitsName
IC_DMA_TDLR	DMATDL

Parameters

I2Cx	I2C instance
level	This parameter should range between 0x0 and 0x8.

Return values

None.