I2C driver APIs. More...

Data Structures
struct	i2c_config_t
	I2C config. More...

Macros
#define	I2C_DATACNT_MAP(x) (((x) == I2C_SOC_TRANSFER_COUNT_MAX) ? 0 : x)

#define	I2C_CMD_NO_ACTION (I2C_CMD_CMD_SET(0))
	I2C CMD. More...

#define	I2C_CMD_ISSUE_DATA_TRANSMISSION (I2C_CMD_CMD_SET(1))

#define	I2C_CMD_ACK (I2C_CMD_CMD_SET(2))

#define	I2C_CMD_NACK (I2C_CMD_CMD_SET(3))

#define	I2C_CMD_CLEAR_FIFO (I2C_CMD_CMD_SET(4))

#define	I2C_CMD_RESET (I2C_CMD_CMD_SET(5))

#define	I2C_DIR_MASTER_WRITE (0U)
	I2C data direction. More...

#define	I2C_DIR_MASTER_READ (1U)

#define	I2C_DIR_SLAVE_READ (0U)

#define	I2C_DIR_SLAVE_WRITE (1U)

#define	I2C_EVENT_TRANSACTION_COMPLETE I2C_INTEN_CMPL_MASK
	I2C events for interrupt enable and status check. More...

#define	I2C_EVENT_BYTE_RECEIVED I2C_INTEN_BYTERECV_MASK

#define	I2C_EVENT_BYTE_TRANSMIT I2C_INTEN_BYTETRANS_MASK

#define	I2C_EVENT_START_CONDITION I2C_INTEN_START_MASK

#define	I2C_EVENT_STOP_CONDITION I2C_INTEN_STOP_MASK

#define	I2C_EVENT_LOSS_ARBITRATION I2C_INTEN_ARBLOSE_MASK

#define	I2C_EVENT_ADDRESS_HIT I2C_INTEN_ADDRHIT_MASK

#define	I2C_EVENT_FIFO_HALF I2C_INTEN_FIFOHALF_MASK

#define	I2C_EVENT_FIFO_FULL I2C_INTEN_FIFOFULL_MASK

#define	I2C_EVENT_FIFO_EMPTY I2C_INTEN_FIFOEMPTY_MASK

#define	I2C_EVENT_ALL_MASK

#define	I2C_STATUS_LINE_SDA I2C_STATUS_LINESDA_MASK
	I2C status for status check only. More...

#define	I2C_STATUS_LINE_SCL I2C_STATUS_LINESCL_MASK

#define	I2C_STATUS_GENERAL_CALL I2C_STATUS_GENCALL_MASK

#define	I2C_STATUS_BUS_BUSY I2C_STATUS_BUSBUSY_MASK

#define	I2C_STATUS_ACK I2C_STATUS_ACK_MASK

#define	I2C_WR 0x0000 /* not operable with read flags*/

#define	I2C_RD (1u << 0) /* not operable with write flags*/

#define	I2C_ADDR_10BIT (1u << 2) /* this is a ten bit chip address */

#define	I2C_NO_START (1u << 4) /* no start phase */

#define	I2C_NO_ADDRESS (1u << 5) /* no address phase */

#define	I2C_NO_READ_ACK (1u << 6) /* when I2C reading, we do not ACK */

#define	I2C_NO_STOP (1u << 7) /* no stop phase */

#define	I2C_WRITE_CHECK_ACK (1u << 8) /* when I2C writing, need check the slave returns ack */

#define	i2c_master_seq_transmit(ptr, device_address, buf, size, opt) i2c_master_seq_transmit_check_ack(ptr, device_address, buf, size, opt, false)
	sequential transmit in master I2C mode an amount of data and checks ACK in blocking, but does not check for ACK signals. More...

Typedefs
typedef enum i2c_mode	i2c_mode_t
	I2C mode. More...

typedef enum i2c_seq_transfer_opt	i2c_seq_transfer_opt_t
	I2c sequential transfer options. More...

Enumerations
enum	{ status_i2c_no_ack = ((uint32_t)( status_group_i2c )1000U + (uint32_t)( 1 )) , status_i2c_invalid_data = ((uint32_t)( status_group_i2c )1000U + (uint32_t)( 2 )) , status_i2c_no_addr_hit = ((uint32_t)( status_group_i2c )1000U + (uint32_t)( 3 )) , status_i2c_transmit_not_completed = ((uint32_t)( status_group_i2c )1000U + (uint32_t)( 4 )) , status_i2c_bus_busy = ((uint32_t)( status_group_i2c )1000U + (uint32_t)( 5 )) , status_i2c_not_supported = ((uint32_t)( status_group_i2c )1000U + (uint32_t)( 9 )) }
	I2C status. More...

enum	i2c_mode { i2c_mode_normal , i2c_mode_fast , i2c_mode_fast_plus }
	I2C mode. More...

enum	i2c_seq_transfer_opt { i2c_frist_frame = 0 , i2c_next_frame , i2c_last_frame }
	I2c sequential transfer options. More...

Functions
static void	i2c_respond_Nack (I2C_Type *ptr)
	respond NACK More...

static void	i2c_respond_ack (I2C_Type *ptr)
	respond ACK More...

static void	i2c_clear_fifo (I2C_Type *ptr)
	clear I2C fifo More...

static uint16_t	i2c_get_data_count (I2C_Type *ptr)
	check data count More...

static bool	i2c_fifo_is_full (I2C_Type *ptr)
	check if I2C FIFO is full More...

static bool	i2c_fifo_is_half (I2C_Type *ptr)
	check if I2C FIFO is half More...

static bool	i2c_fifo_is_empty (I2C_Type *ptr)
	check if I2C FIFO is empty More...

static bool	i2c_is_writing (I2C_Type *ptr)
	check if I2C is writing More...

static bool	i2c_is_reading (I2C_Type *ptr)
	check if I2C is reading More...

static bool	i2c_get_line_sda_status (I2C_Type *ptr)
	get i2c sda line status More...

static bool	i2c_get_line_scl_status (I2C_Type *ptr)
	get i2c scl line status More...

static void	i2c_clear_status (I2C_Type *ptr, uint32_t mask)
	clear status More...

static uint32_t	i2c_get_status (I2C_Type *ptr)
	get status More...

static uint32_t	i2c_get_irq_setting (I2C_Type *ptr)
	i2c get interrupts setting More...

static void	i2c_disable_irq (I2C_Type *ptr, uint32_t mask)
	disable interrupts More...

static void	i2c_enable_irq (I2C_Type *ptr, uint32_t mask)
	enable interrupts More...

static void	i2c_disable_auto_ack (I2C_Type *ptr)
	disable auto ack More...

static void	i2c_enable_auto_ack (I2C_Type *ptr)
	enable auto ack More...

static void	i2c_enable_10bit_address_mode (I2C_Type *ptr, bool enable)
	enable 10 bit address mode More...

hpm_stat_t	i2c_init_master (I2C_Type ptr, uint32_t src_clk_in_hz, i2c_config_t config)
	I2C master initialization. More...

hpm_stat_t	i2c_master_address_write (I2C_Type ptr, const uint16_t device_address, uint8_t addr, uint32_t addr_size_in_byte, uint8_t *buf, const uint32_t size_in_byte)
	I2C master write data to specific address of certain slave device. More...

hpm_stat_t	i2c_master_address_read (I2C_Type ptr, const uint16_t device_address, uint8_t addr, uint32_t addr_size_in_byte, uint8_t *buf, const uint32_t size_in_byte)
	I2C master read data from specific address of certain slave device. More...

hpm_stat_t	i2c_master_write (I2C_Type ptr, const uint16_t device_address, uint8_t buf, const uint32_t size)
	I2C master write data to certain slave device. More...

hpm_stat_t	i2c_master_start_dma_write (I2C_Type *i2c_ptr, const uint16_t device_address, uint32_t size)
	I2C master start write data by DMA. More...

hpm_stat_t	i2c_master_start_dma_read (I2C_Type *i2c_ptr, const uint16_t device_address, uint32_t size)
	I2C master start read data by DMA. More...

hpm_stat_t	i2c_master_read (I2C_Type ptr, const uint16_t device_address, uint8_t buf, const uint32_t size)
	I2C master read data from certain slave device. More...

hpm_stat_t	i2c_init_slave (I2C_Type ptr, uint32_t src_clk_in_hz, i2c_config_t config, const uint16_t slave_address)
	I2C slave initialization. More...

hpm_stat_t	i2c_slave_read (I2C_Type ptr, uint8_t buf, const uint32_t size)
	I2C slave read data. More...

hpm_stat_t	i2c_slave_write (I2C_Type ptr, uint8_t buf, const uint32_t size)
	I2C slave write data. More...

void	i2c_reset (I2C_Type *ptr)
	reset I2C More...

static void	i2c_dma_enable (I2C_Type *ptr)
	Enable i2c DMA. More...

static void	i2c_dma_disable (I2C_Type *ptr)
	Disable i2c DMA. More...

hpm_stat_t	i2c_slave_dma_transfer (I2C_Type *ptr, const uint32_t size)
	I2C slave dma transfer data. More...

static void	i2c_write_byte (I2C_Type *ptr, uint8_t data)
	I2C write byte into FIFO. More...

static uint8_t	i2c_read_byte (I2C_Type *ptr)
	I2C read byte into FIFO. More...

static uint8_t	i2c_get_direction (I2C_Type *ptr)
	I2C get direction. More...

hpm_stat_t	i2c_master_configure_transfer (I2C_Type *i2c_ptr, const uint16_t device_address, uint32_t size, bool read)
	I2C master configure transfer setting. More...

hpm_stat_t	i2c_master_seq_transmit_check_ack (I2C_Type ptr, const uint16_t device_address, uint8_t buf, const uint32_t size, i2c_seq_transfer_opt_t opt, bool ack_check)
	sequential transmit in master I2C mode an amount of data and checks ACK in blocking More...

hpm_stat_t	i2c_master_seq_receive (I2C_Type ptr, const uint16_t device_address, uint8_t buf, const uint32_t size, i2c_seq_transfer_opt_t opt)
	sequential receive in master I2C mode an amount of data in blocking More...

static void	i2c_gen_reset_signal (I2C_Type *ptr, uint8_t clk_len)
	generate SCL clock as reset signal More...

hpm_stat_t	i2c_master_transfer (I2C_Type ptr, const uint16_t device_address, uint8_t buf, const uint32_t size, uint16_t flags)
	data transfer on master I2C mode in blocking More...

static hpm_stat_t	i2c_set_data_count (I2C_Type *ptr, uint32_t size)
	Set the I2C data transfer count. More...

static void	i2c_master_issue_data_transmission (I2C_Type *ptr)
	Trigger the I2C controller to issue a data transmission command. More...

static void	i2c_master_set_slave_address (I2C_Type *ptr, uint16_t address)
	Set the slave address for I2C master mode. More...

static void	i2c_master_enable_start_phase (I2C_Type *ptr)
	Enable start phase at the transaction. More...

static void	i2c_master_disable_start_phase (I2C_Type *ptr)
	Disable start phase at the transaction. More...

static void	i2c_master_enable_addr_phase (I2C_Type *ptr)
	Enable address phase at the transaction. More...

static void	i2c_master_disable_addr_phase (I2C_Type *ptr)
	Disable address phase at the transaction. More...

static void	i2c_master_enable_data_phase (I2C_Type *ptr)
	Enable data phase at the transaction. More...

static void	i2c_master_disable_data_phase (I2C_Type *ptr)
	Disable data phase at the transaction. More...

static void	i2c_master_enable_stop_phase (I2C_Type *ptr)
	Enable stop phase at the transaction. More...

static void	i2c_master_disable_stop_phase (I2C_Type *ptr)
	Disable stop phase at the transaction. More...

static void	i2c_set_direction (I2C_Type *ptr, bool direction)
	set i2c transaction direction More...

Detailed Description

I2C driver APIs.

Macro Definition Documentation

◆ I2C_ADDR_10BIT

#define I2C_ADDR_10BIT (1u << 2) /* this is a ten bit chip address */

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_CMD_ACK

#define I2C_CMD_ACK (I2C_CMD_CMD_SET(2))

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_CMD_CLEAR_FIFO

#define I2C_CMD_CLEAR_FIFO (I2C_CMD_CMD_SET(4))

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_CMD_ISSUE_DATA_TRANSMISSION

#define I2C_CMD_ISSUE_DATA_TRANSMISSION (I2C_CMD_CMD_SET(1))

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_CMD_NACK

#define I2C_CMD_NACK (I2C_CMD_CMD_SET(3))

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_CMD_NO_ACTION

#define I2C_CMD_NO_ACTION (I2C_CMD_CMD_SET(0))

#include <drivers/inc/hpm_i2c_drv.h>

I2C CMD.

◆ I2C_CMD_RESET

#define I2C_CMD_RESET (I2C_CMD_CMD_SET(5))

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_DATACNT_MAP

#define I2C_DATACNT_MAP ( x ) (((x) == I2C_SOC_TRANSFER_COUNT_MAX) ? 0 : x)

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_DIR_MASTER_READ

#define I2C_DIR_MASTER_READ (1U)

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_DIR_MASTER_WRITE

#define I2C_DIR_MASTER_WRITE (0U)

#include <drivers/inc/hpm_i2c_drv.h>

I2C data direction.

◆ I2C_DIR_SLAVE_READ

#define I2C_DIR_SLAVE_READ (0U)

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_DIR_SLAVE_WRITE

#define I2C_DIR_SLAVE_WRITE (1U)

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_ADDRESS_HIT

#define I2C_EVENT_ADDRESS_HIT I2C_INTEN_ADDRHIT_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_ALL_MASK

#define I2C_EVENT_ALL_MASK

#include <drivers/inc/hpm_i2c_drv.h>

Value:

                                        (I2C_INTEN_CMPL_MASK \
                                        | I2C_INTEN_BYTERECV_MASK \
                                        | I2C_INTEN_BYTETRANS_MASK \
                                        | I2C_INTEN_START_MASK \
                                        | I2C_INTEN_STOP_MASK \
                                        | I2C_INTEN_ARBLOSE_MASK \
                                        | I2C_INTEN_ADDRHIT_MASK \
                                        | I2C_INTEN_FIFOHALF_MASK \
                                        | I2C_INTEN_FIFOFULL_MASK \
                                        | I2C_INTEN_FIFOEMPTY_MASK)

◆ I2C_EVENT_BYTE_RECEIVED

#define I2C_EVENT_BYTE_RECEIVED I2C_INTEN_BYTERECV_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_BYTE_TRANSMIT

#define I2C_EVENT_BYTE_TRANSMIT I2C_INTEN_BYTETRANS_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_FIFO_EMPTY

#define I2C_EVENT_FIFO_EMPTY I2C_INTEN_FIFOEMPTY_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_FIFO_FULL

#define I2C_EVENT_FIFO_FULL I2C_INTEN_FIFOFULL_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_FIFO_HALF

#define I2C_EVENT_FIFO_HALF I2C_INTEN_FIFOHALF_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_LOSS_ARBITRATION

#define I2C_EVENT_LOSS_ARBITRATION I2C_INTEN_ARBLOSE_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_START_CONDITION

#define I2C_EVENT_START_CONDITION I2C_INTEN_START_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_STOP_CONDITION

#define I2C_EVENT_STOP_CONDITION I2C_INTEN_STOP_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_EVENT_TRANSACTION_COMPLETE

#define I2C_EVENT_TRANSACTION_COMPLETE I2C_INTEN_CMPL_MASK

#include <drivers/inc/hpm_i2c_drv.h>

I2C events for interrupt enable and status check.

◆ i2c_master_seq_transmit

#define i2c_master_seq_transmit	(	ptr,
		device_address,
		buf,
		size,
		opt
	)	i2c_master_seq_transmit_check_ack(ptr, device_address, buf, size, opt, false)

#include <drivers/inc/hpm_i2c_drv.h>

sequential transmit in master I2C mode an amount of data and checks ACK in blocking, but does not check for ACK signals.

Parameters

[in]	ptr	ptr I2C base address
[in]	device_address	I2C slave address
[in]	buf	pointer of the buffer to store data sent from device
[in]	size	size of data to be sent in bytes
[in]	opt	I2c sequential transfer options

Return values

hpm_stat_t status_success if transmit is completed without any error

◆ I2C_NO_ADDRESS

#define I2C_NO_ADDRESS (1u << 5) /* no address phase */

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_NO_READ_ACK

#define I2C_NO_READ_ACK (1u << 6) /* when I2C reading, we do not ACK */

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_NO_START

#define I2C_NO_START (1u << 4) /* no start phase */

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_NO_STOP

#define I2C_NO_STOP (1u << 7) /* no stop phase */

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_RD

#define I2C_RD (1u << 0) /* not operable with write flags*/

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_STATUS_ACK

#define I2C_STATUS_ACK I2C_STATUS_ACK_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_STATUS_BUS_BUSY

#define I2C_STATUS_BUS_BUSY I2C_STATUS_BUSBUSY_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_STATUS_GENERAL_CALL

#define I2C_STATUS_GENERAL_CALL I2C_STATUS_GENCALL_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_STATUS_LINE_SCL

#define I2C_STATUS_LINE_SCL I2C_STATUS_LINESCL_MASK

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_STATUS_LINE_SDA

#define I2C_STATUS_LINE_SDA I2C_STATUS_LINESDA_MASK

#include <drivers/inc/hpm_i2c_drv.h>

I2C status for status check only.

◆ I2C_WR

#define I2C_WR 0x0000 /* not operable with read flags*/

#include <drivers/inc/hpm_i2c_drv.h>

◆ I2C_WRITE_CHECK_ACK

#define I2C_WRITE_CHECK_ACK (1u << 8) /* when I2C writing, need check the slave returns ack */

#include <drivers/inc/hpm_i2c_drv.h>

Typedef Documentation

◆ i2c_mode_t

typedef enum i2c_mode i2c_mode_t

#include <drivers/inc/hpm_i2c_drv.h>

I2C mode.

◆ i2c_seq_transfer_opt_t

typedef enum i2c_seq_transfer_opt i2c_seq_transfer_opt_t

#include <drivers/inc/hpm_i2c_drv.h>

I2c sequential transfer options.

: i2c_frist_frame: has start signal
: i2c_next_frame: middle transfer
: i2c_last_frame: has stop signal

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

#include <drivers/inc/hpm_i2c_drv.h>

I2C status.

Enumerator
status_i2c_no_ack
status_i2c_invalid_data
status_i2c_no_addr_hit
status_i2c_transmit_not_completed
status_i2c_bus_busy
status_i2c_not_supported

◆ i2c_mode

enum i2c_mode

#include <drivers/inc/hpm_i2c_drv.h>

I2C mode.

Enumerator
i2c_mode_normal
i2c_mode_fast
i2c_mode_fast_plus

◆ i2c_seq_transfer_opt

enum i2c_seq_transfer_opt

#include <drivers/inc/hpm_i2c_drv.h>

I2c sequential transfer options.

: i2c_frist_frame: has start signal
: i2c_next_frame: middle transfer
: i2c_last_frame: has stop signal

Enumerator
i2c_frist_frame
i2c_next_frame
i2c_last_frame

Function Documentation

◆ i2c_clear_fifo()

static void i2c_clear_fifo ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

clear I2C fifo

Parameters

[in] ptr I2C base address

◆ i2c_clear_status()

static void i2c_clear_status	(	I2C_Type *	ptr,
		uint32_t	mask
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

clear status

Clear status based on mask

Parameters

[in]	ptr	I2C base address
[in]	mask	mask to clear status

◆ i2c_disable_auto_ack()

static void i2c_disable_auto_ack ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

disable auto ack

Disable I2C auto generates proper acknowledgements for each byte received

Parameters

[in] ptr I2C base address

◆ i2c_disable_irq()

static void i2c_disable_irq	(	I2C_Type *	ptr,
		uint32_t	mask
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

disable interrupts

Disable interrupts based on given mask

Parameters

[in]	ptr	I2C base address
[in]	mask	interrupt mask to be disabled

◆ i2c_dma_disable()

static void i2c_dma_disable ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Disable i2c DMA.

Parameters

[in] ptr I2C base address

◆ i2c_dma_enable()

static void i2c_dma_enable ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Enable i2c DMA.

Parameters

[in] ptr I2C base address

◆ i2c_enable_10bit_address_mode()

static void i2c_enable_10bit_address_mode	(	I2C_Type *	ptr,
		bool	enable
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

enable 10 bit address mode

enable 10 bit address mode, if not, address is 7 bit mode

Parameters

[in]	ptr	I2C base address
[in]	enable	true: enable 10 bit address mode false: enable 7 bit address mode

◆ i2c_enable_auto_ack()

static void i2c_enable_auto_ack ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

enable auto ack

Enable I2C auto generates proper acknowledgements for each byte received

Parameters

[in] ptr I2C base address

◆ i2c_enable_irq()

static void i2c_enable_irq	(	I2C_Type *	ptr,
		uint32_t	mask
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

enable interrupts

Enable interrupts based on given mask

Parameters

[in]	ptr	I2C base address
[in]	mask	interrupt mask to be enabled

◆ i2c_fifo_is_empty()

static bool i2c_fifo_is_empty ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

check if I2C FIFO is empty

Parameters

[in] ptr I2C base address

Return values

true	if FIFO is empty

◆ i2c_fifo_is_full()

static bool i2c_fifo_is_full ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

check if I2C FIFO is full

Parameters

[in] ptr I2C base address

Return values

true	if FIFO is full

◆ i2c_fifo_is_half()

static bool i2c_fifo_is_half ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

check if I2C FIFO is half

Note: When I2C is transmitting data, it indicates if fifo is half-empty;; When I2C is receiving data, it indicates if fifo is half full.

Parameters

[in] ptr I2C base address

Return values

true	if FIFO is half empty or full

◆ i2c_gen_reset_signal()

static void i2c_gen_reset_signal	(	I2C_Type *	ptr,
		uint8_t	clk_len
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

generate SCL clock as reset signal

Parameters

	ptr	[in] ptr I2C base address
[in]	clk_len	SCL clock length

◆ i2c_get_data_count()

static uint16_t i2c_get_data_count ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

check data count

It indicates number of bytes to transfer

Parameters

[in] ptr I2C base address

Return values

data	count value in byte

◆ i2c_get_direction()

static uint8_t i2c_get_direction ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

I2C get direction.

Note: The same value has different meanings in master and slave modes

Parameters

ptr	[in] ptr I2C base address

Returns: uint8_t direction value

◆ i2c_get_irq_setting()

static uint32_t i2c_get_irq_setting ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

i2c get interrupts setting

Get interrupt setting register value

Parameters

[in] ptr I2C base address

Return values

[out] uint32_t interrupt setting register value

◆ i2c_get_line_scl_status()

static bool i2c_get_line_scl_status ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

get i2c scl line status

Parameters

[in] ptr I2C base address

Return values

bool	value true: the scl line is high false: the scl line is low

◆ i2c_get_line_sda_status()

static bool i2c_get_line_sda_status ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

get i2c sda line status

Parameters

[in] ptr I2C base address

Return values

bool	value true: the sda line is high false: the sda line is low

◆ i2c_get_status()

static uint32_t i2c_get_status ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

get status

Get current I2C status bits

Parameters

[in] ptr I2C base address

Return values

current I2C status

◆ i2c_init_master()

hpm_stat_t i2c_init_master	(	I2C_Type *	ptr,
		uint32_t	src_clk_in_hz,
		i2c_config_t *	config
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C master initialization.

Initialized I2C controller working at master mode

Parameters

[in]	ptr	I2C base address
[in]	src_clk_in_hz	I2C controller source clock source frequency in Hz
[in]	config	i2c_config_t

Return values

hpm_stat_t status_success if initialization is completed without any error

◆ i2c_init_slave()

hpm_stat_t i2c_init_slave	(	I2C_Type *	ptr,
		uint32_t	src_clk_in_hz,
		i2c_config_t *	config,
		const uint16_t	slave_address
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C slave initialization.

Initialize I2C controller working at slave mode

Parameters

[in]	ptr	I2C base address
[in]	src_clk_in_hz	I2C controller source clock source frequency in Hz
[in]	config	I2C configuration structure
[in]	slave_address	I2C address to be used at slave mode

Return values

hpm_stat_t status_success if initialization is completed without any error

◆ i2c_is_reading()

static bool i2c_is_reading ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

check if I2C is reading

Parameters

[in] ptr I2C base address

Return values

bool	value true: send data if master mode, receive data in slave mode false: receive data if master mode, send data in slave mode

◆ i2c_is_writing()

static bool i2c_is_writing ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

check if I2C is writing

Parameters

[in] ptr I2C base address

Return values

bool	value true: receive data if master mode, send data in slave mode false: send data if master mode, reveive data in slave mode

◆ i2c_master_address_read()

hpm_stat_t i2c_master_address_read	(	I2C_Type *	ptr,
		const uint16_t	device_address,
		uint8_t *	addr,
		uint32_t	addr_size_in_byte,
		uint8_t *	buf,
		const uint32_t	size_in_byte
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C master read data from specific address of certain slave device.

Read fram certain I2C device at specific address within that device

Note: both addr_size_in_byte and size_in_byte should not not greater than I2C_SOC_TRANSFER_COUNT_MAX

Parameters

[in]	ptr	I2C base address
[in]	device_address	I2C slave address
[in]	addr	address in that I2C device
[in]	addr_size_in_byte	I2C address in byte
[out]	buf	pointer of the buffer to receive data read from the device
[in]	size_in_byte	size of data to be read in bytes

Return values

hpm_stat_t status_success if reading is completed without any error

◆ i2c_master_address_write()

hpm_stat_t i2c_master_address_write	(	I2C_Type *	ptr,
		const uint16_t	device_address,
		uint8_t *	addr,
		uint32_t	addr_size_in_byte,
		uint8_t *	buf,
		const uint32_t	size_in_byte
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C master write data to specific address of certain slave device.

Write to certain I2C device at specific address within that device

Note: the sum of addr_size_in_byte and size_in_byte should not not greater than I2C_SOC_TRANSFER_COUNT_MAX

Parameters

[in]	ptr	I2C base address
[in]	device_address	I2C slave address
[in]	addr	address in that I2C device
[in]	addr_size_in_byte	I2C address in byte
[in]	buf	pointer of the data to be sent
[in]	size_in_byte	size of data to be sent in bytes

Return values

hpm_stat_t status_success if writing is completed without any error

◆ i2c_master_configure_transfer()

hpm_stat_t i2c_master_configure_transfer	(	I2C_Type *	i2c_ptr,
		const uint16_t	device_address,
		uint32_t	size,
		bool	read
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C master configure transfer setting.

Parameters

i2c_ptr	[in] ptr I2C base address
device_address	[in] I2C slave address
size	[in] size of data to be transferred in bytes
read	[in] true for receive, false for transmit

Return values

hpm_stat_t status_success if configuring transmission without any error

◆ i2c_master_disable_addr_phase()

static void i2c_master_disable_addr_phase ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Disable address phase at the transaction.

Parameters

[in] ptr ptr I2C base address

◆ i2c_master_disable_data_phase()

static void i2c_master_disable_data_phase ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Disable data phase at the transaction.

Parameters

[in] ptr ptr I2C base address

◆ i2c_master_disable_start_phase()

static void i2c_master_disable_start_phase ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Disable start phase at the transaction.

Parameters

[in] ptr ptr I2C base address

◆ i2c_master_disable_stop_phase()

static void i2c_master_disable_stop_phase ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Disable stop phase at the transaction.

Parameters

[in] ptr ptr I2C base address

◆ i2c_master_enable_addr_phase()

static void i2c_master_enable_addr_phase ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Enable address phase at the transaction.

Parameters

[in] ptr ptr I2C base address

◆ i2c_master_enable_data_phase()

static void i2c_master_enable_data_phase ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Enable data phase at the transaction.

Parameters

[in] ptr ptr I2C base address

◆ i2c_master_enable_start_phase()

static void i2c_master_enable_start_phase ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Enable start phase at the transaction.

Parameters

[in] ptr ptr I2C base address

◆ i2c_master_enable_stop_phase()

static void i2c_master_enable_stop_phase ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Enable stop phase at the transaction.

Parameters

[in] ptr ptr I2C base address

◆ i2c_master_issue_data_transmission()

static void i2c_master_issue_data_transmission ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Trigger the I2C controller to issue a data transmission command.

Its purpose is to send a command to the I2C controller, instructing it to initiate a data transmission transaction as the master device.

Parameters

[in] ptr I2C base address

◆ i2c_master_read()

hpm_stat_t i2c_master_read	(	I2C_Type *	ptr,
		const uint16_t	device_address,
		uint8_t *	buf,
		const uint32_t	size
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C master read data from certain slave device.

Read data from I2C device

Note: size should not not greater than I2C_SOC_TRANSFER_COUNT_MAX

Parameters

[in]	ptr	I2C base address
[in]	device_address	I2C slave address
[out]	buf	pointer of the buffer to store data read from device
[in]	size	size of data to be read in bytes

Return values

hpm_stat_t status_success if reading is completed without any error

◆ i2c_master_seq_receive()

hpm_stat_t i2c_master_seq_receive	(	I2C_Type *	ptr,
		const uint16_t	device_address,
		uint8_t *	buf,
		const uint32_t	size,
		i2c_seq_transfer_opt_t	opt
	)

#include <drivers/inc/hpm_i2c_drv.h>

sequential receive in master I2C mode an amount of data in blocking

Parameters

[in]	ptr	ptr I2C base address
[in]	device_address	I2C slave address
[in]	buf	pointer of the buffer to store data sent from device
[in]	size	size of data to be sent in bytes
[in]	opt	I2c sequential transfer options

Return values

hpm_stat_t status_success if receive is completed without any error

◆ i2c_master_seq_transmit_check_ack()

hpm_stat_t i2c_master_seq_transmit_check_ack	(	I2C_Type *	ptr,
		const uint16_t	device_address,
		uint8_t *	buf,
		const uint32_t	size,
		i2c_seq_transfer_opt_t	opt,
		bool	ack_check
	)

#include <drivers/inc/hpm_i2c_drv.h>

sequential transmit in master I2C mode an amount of data and checks ACK in blocking

Parameters

[in]	ptr	ptr I2C base address
[in]	device_address	I2C slave address
[in]	buf	pointer of the buffer to store data sent from device
[in]	size	size of data to be sent in bytes
[in]	opt	I2c sequential transfer options
[in]	ack_check	true to check ack, false to not check ack

Return values

hpm_stat_t status_success if transmit is completed without any error

◆ i2c_master_set_slave_address()

static void i2c_master_set_slave_address	(	I2C_Type *	ptr,
		uint16_t	address
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Set the slave address for I2C master mode.

This function configures the slave address in I2C master mode by writing the processed slave address to the ADDR register of the I2C module.

Parameters

[in]	ptr	I2C base address
[in]	address	The slave address to be set, which is a 7-bit or 10-bit address depending on the I2C protocol

◆ i2c_master_start_dma_read()

hpm_stat_t i2c_master_start_dma_read	(	I2C_Type *	i2c_ptr,
		const uint16_t	device_address,
		uint32_t	size
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C master start read data by DMA.

Read data to I2C device by DMA

Note: size should not not greater than I2C_SOC_TRANSFER_COUNT_MAX

Parameters

[in]	i2c_ptr	I2C base address
[in]	device_address	I2C slave address
[in]	size	size of data to be read in bytes

Return values

hpm_stat_t status_success if starting transmission without any error

◆ i2c_master_start_dma_write()

hpm_stat_t i2c_master_start_dma_write	(	I2C_Type *	i2c_ptr,
		const uint16_t	device_address,
		uint32_t	size
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C master start write data by DMA.

Write data to I2C device by DMA

Note: size should not not greater than I2C_SOC_TRANSFER_COUNT_MAX

Parameters

[in]	i2c_ptr	I2C base address
[in]	device_address	I2C slave address
[in]	size	size of data to be sent in bytes

Return values

hpm_stat_t status_success if starting transmission without any error

◆ i2c_master_transfer()

hpm_stat_t i2c_master_transfer	(	I2C_Type *	ptr,
		const uint16_t	device_address,
		uint8_t *	buf,
		const uint32_t	size,
		uint16_t	flags
	)

#include <drivers/inc/hpm_i2c_drv.h>

data transfer on master I2C mode in blocking

Parameters

[in]	ptr	ptr I2C base address
[in]	device_address	I2C slave address
[in]	buf	pointer of the buffer to store data sent from device
[in]	size	size of data to be sent in bytes
[in]	flags	flag bit, which can be other flag bits except I2C_WR I2C_RD, and can perform "\|" operation

Return values

hpm_stat_t status_success if receive is completed without any error

◆ i2c_master_write()

hpm_stat_t i2c_master_write	(	I2C_Type *	ptr,
		const uint16_t	device_address,
		uint8_t *	buf,
		const uint32_t	size
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C master write data to certain slave device.

Write data to I2C device

Note: size should not not greater than I2C_SOC_TRANSFER_COUNT_MAX

Parameters

[in]	ptr	I2C base address
[in]	device_address	I2C slave address
[in]	buf	pointer of the data to be sent
[in]	size	size of data to be sent in bytes

Return values

hpm_stat_t status_success if writing is completed without any error

◆ i2c_read_byte()

static uint8_t i2c_read_byte ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

I2C read byte into FIFO.

Parameters

ptr	[in] ptr I2C base address

Returns: uint8_t read byte

◆ i2c_reset()

void i2c_reset ( I2C_Type * ptr )

#include <drivers/inc/hpm_i2c_drv.h>

reset I2C

Parameters

[in] ptr I2C base address

◆ i2c_respond_ack()

static void i2c_respond_ack ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

respond ACK

Parameters

[in] ptr I2C base address

◆ i2c_respond_Nack()

static void i2c_respond_Nack ( I2C_Type * ptr )

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

respond NACK

Parameters

[in] ptr I2C base address

◆ i2c_set_data_count()

static hpm_stat_t i2c_set_data_count	(	I2C_Type *	ptr,
		uint32_t	size
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

Set the I2C data transfer count.

This function configures the I2C controller to specify the amount of data to be transferred. It ensures that the data size does not exceed the system's maximum transfer limit.

Parameters

[in]	ptr	I2C base address
[in]	size	The amount of data to be transferred, in bytes

Return values

hpm_stat_t status_success if set without any error

◆ i2c_set_direction()

static void i2c_set_direction	(	I2C_Type *	ptr,
		bool	direction
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

set i2c transaction direction

Parameters

[in] ptr ptr I2C base address

◆ i2c_slave_dma_transfer()

hpm_stat_t i2c_slave_dma_transfer	(	I2C_Type *	ptr,
		const uint32_t	size
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C slave dma transfer data.

Note: The direction of data transmission depends on Master setting

Parameters

[in]	ptr	I2C base address
[in]	size	size of data in bytes

Return values

hpm_stat_t status_success if configuring transmission without any error

◆ i2c_slave_read()

hpm_stat_t i2c_slave_read	(	I2C_Type *	ptr,
		uint8_t *	buf,
		const uint32_t	size
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C slave read data.

Read data at slave mode

Note: size should not not greater than I2C_SOC_TRANSFER_COUNT_MAX

Parameters

[in]	ptr	I2C base address
[in]	buf	pointer of the buffer to store data read from device
[in]	size	size of data to be read in bytes

Return values

hpm_stat_t status_success if reading is completed without any error

◆ i2c_slave_write()

hpm_stat_t i2c_slave_write	(	I2C_Type *	ptr,
		uint8_t *	buf,
		const uint32_t	size
	)

#include <drivers/inc/hpm_i2c_drv.h>

I2C slave write data.

Write data at slave mode.

Note: size should not not greater than I2C_SOC_TRANSFER_COUNT_MAX

Parameters

[in]	ptr	I2C base address
[in]	buf	pointer of the buffer to store data sent from device
[in]	size	size of data to be sent in bytes

Return values

hpm_stat_t status_success if writing is completed without any error

◆ i2c_write_byte()

static void i2c_write_byte	(	I2C_Type *	ptr,
		uint8_t	data
	)

inlinestatic

#include <drivers/inc/hpm_i2c_drv.h>

I2C write byte into FIFO.

Parameters

ptr	[in] ptr I2C base address
data	[in] byte to ne sent

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ I2C_ADDR_10BIT

◆ I2C_CMD_ACK

◆ I2C_CMD_CLEAR_FIFO

◆ I2C_CMD_ISSUE_DATA_TRANSMISSION

◆ I2C_CMD_NACK

◆ I2C_CMD_NO_ACTION

◆ I2C_CMD_RESET

◆ I2C_DATACNT_MAP

◆ I2C_DIR_MASTER_READ

◆ I2C_DIR_MASTER_WRITE

◆ I2C_DIR_SLAVE_READ

◆ I2C_DIR_SLAVE_WRITE

◆ I2C_EVENT_ADDRESS_HIT

◆ I2C_EVENT_ALL_MASK

◆ I2C_EVENT_BYTE_RECEIVED

◆ I2C_EVENT_BYTE_TRANSMIT

◆ I2C_EVENT_FIFO_EMPTY

◆ I2C_EVENT_FIFO_FULL

◆ I2C_EVENT_FIFO_HALF

◆ I2C_EVENT_LOSS_ARBITRATION

◆ I2C_EVENT_START_CONDITION

◆ I2C_EVENT_STOP_CONDITION

◆ I2C_EVENT_TRANSACTION_COMPLETE

◆ i2c_master_seq_transmit

◆ I2C_NO_ADDRESS

◆ I2C_NO_READ_ACK

◆ I2C_NO_START

◆ I2C_NO_STOP

◆ I2C_RD

◆ I2C_STATUS_ACK

◆ I2C_STATUS_BUS_BUSY

◆ I2C_STATUS_GENERAL_CALL

◆ I2C_STATUS_LINE_SCL

◆ I2C_STATUS_LINE_SDA

◆ I2C_WR

◆ I2C_WRITE_CHECK_ACK

Typedef Documentation

◆ i2c_mode_t

◆ i2c_seq_transfer_opt_t

Enumeration Type Documentation

◆ anonymous enum

◆ i2c_mode

◆ i2c_seq_transfer_opt

Function Documentation

◆ i2c_clear_fifo()

◆ i2c_clear_status()

◆ i2c_disable_auto_ack()

◆ i2c_disable_irq()

◆ i2c_dma_disable()

◆ i2c_dma_enable()

◆ i2c_enable_10bit_address_mode()

◆ i2c_enable_auto_ack()

◆ i2c_enable_irq()

◆ i2c_fifo_is_empty()

◆ i2c_fifo_is_full()

◆ i2c_fifo_is_half()

◆ i2c_gen_reset_signal()

◆ i2c_get_data_count()

◆ i2c_get_direction()

◆ i2c_get_irq_setting()

◆ i2c_get_line_scl_status()

◆ i2c_get_line_sda_status()

◆ i2c_get_status()

◆ i2c_init_master()

◆ i2c_init_slave()

◆ i2c_is_reading()

◆ i2c_is_writing()

◆ i2c_master_address_read()

◆ i2c_master_address_write()

◆ i2c_master_configure_transfer()

◆ i2c_master_disable_addr_phase()

◆ i2c_master_disable_data_phase()

◆ i2c_master_disable_start_phase()