Resistive Random Access Memory Controller (RRAMC) peripheral driver. More...

Data Structures
struct	nrfx_rramc_config_t
	Configuration structure of the RRAMC driver instance. More...

Macros
#define	NRFX_RRAMC_DEFAULT_CONFIG(_write_buff_size)
	RRAMC driver default configuration.

Typedefs
typedef void(*	nrfx_rramc_evt_handler_t) (nrf_rramc_event_t const event_type)
	RRAMC driver event handler type.

Functions
void	nrfx_rramc_all_erase (void)
	Function for erasing the whole RRAM memory.

void	nrfx_rramc_byte_write (uint32_t address, uint8_t value)
	Function for writing a single byte to RRAM.

void	nrfx_rramc_bytes_write (uint32_t address, void const *src, uint32_t num_bytes)
	Function for writing consecutive bytes to RRAM.

void	nrfx_rramc_word_write (uint32_t address, uint32_t value)
	Function for writing a 32-bit word to RRAM.

void	nrfx_rramc_words_write (uint32_t address, void const *src, uint32_t num_words)
	Function for writing consecutive 32-bit words to RRAM.

void	nrfx_rramc_write_enable_set (bool enable, uint32_t write_buff_size)
	Function for enabling write mode and setting size of write buffer.

bool	nrfx_rramc_write_enable_check (void)
	Function for checking if write mode is enabled.

nrfx_err_t	nrfx_rramc_init (nrfx_rramc_config_t const *p_config, nrfx_rramc_evt_handler_t handler)
	Function for initializing the RRAMC driver instance.

nrfx_err_t	nrfx_rramc_reconfigure (nrfx_rramc_config_t const *p_config)
	Function for reconfiguring the RRAMC driver instance.

void	nrfx_rramc_uninit (void)
	Function for uninitializing the RRAMC driver instance.

uint32_t	nrfx_rramc_memory_size_get (void)
	Function for getting the total RRAM size in bytes.

NRFX_STATIC_INLINE uint32_t	nrfx_rramc_otp_word_read (uint32_t index)
	Function for reading a word from the OTP in UICR.

NRFX_STATIC_INLINE bool	nrfx_rramc_otp_word_write (uint32_t index, uint32_t value)
	Function for writing a 32-bit word at index position to OTP region in UICR.

NRFX_STATIC_INLINE uint8_t	nrfx_rramc_byte_read (uint32_t address)
	Function for reading a byte from the RRAM.

NRFX_STATIC_INLINE uint32_t	nrfx_rramc_word_read (uint32_t address)
	Function for reading a 32-bit word from the RRAM.

NRFX_STATIC_INLINE void	nrfx_rramc_buffer_read (void *dst, uint32_t address, uint32_t num_bytes)
	Function for reading a given number of bytes from the RRAM into the specified buffer.

NRFX_STATIC_INLINE bool	nrfx_rramc_ready_check (void)
	Function for checking current RRAMC operation status.

Detailed Description

Resistive Random Access Memory Controller (RRAMC) peripheral driver.

Macro Definition Documentation

◆ NRFX_RRAMC_DEFAULT_CONFIG

#define NRFX_RRAMC_DEFAULT_CONFIG ( _write_buff_size )

Value:

{ \
 .mode_write = false, \
 .write_buff_size = _write_buff_size, \
 .preload_timeout = 0x80, \
 .preload_timeout_enable = true, \
 .access_timeout = 0x100, \
 .abort_on_pof = true, \
 .irq_priority = NRFX_RRAMC_DEFAULT_CONFIG_IRQ_PRIORITY, \
}

RRAMC driver default configuration.

This configuration sets up RRAMC with the following options:

Write mode disabled
Preload timeout value: 0x80
Write to the RRAM on the next timeout enabled
Access timeout: 0x100
Write operation is to be aborted on the power failure

Parameters

[in] _write_buff_size Size of write buffer.

Typedef Documentation

◆ nrfx_rramc_evt_handler_t

typedef void(* nrfx_rramc_evt_handler_t) (nrf_rramc_event_t const event_type)

RRAMC driver event handler type.

Parameters

[in] event_type RRAMC event.

Function Documentation

◆ nrfx_rramc_all_erase()

void nrfx_rramc_all_erase ( void )

Function for erasing the whole RRAM memory.

Note: All user code and UICR will be erased.

◆ nrfx_rramc_buffer_read()

NRFX_STATIC_INLINE void nrfx_rramc_buffer_read	(	void *	dst,
		uint32_t	address,
		uint32_t	num_bytes
	)

Function for reading a given number of bytes from the RRAM into the specified buffer.

Parameters

[out]	dst	Pointer to the buffer to store the data.
[in]	address	Address of the first byte to be read.
[in]	num_bytes	Number of bytes to be read.

◆ nrfx_rramc_byte_read()

NRFX_STATIC_INLINE uint8_t nrfx_rramc_byte_read ( uint32_t address )

Function for reading a byte from the RRAM.

Use this function in case accessing the RRAM gives the possibility to run the code in an environment where the flash is simulated.

Parameters

[in] address Address of the byte to be read.

Returns: Value read from RRAM.

◆ nrfx_rramc_byte_write()

void nrfx_rramc_byte_write	(	uint32_t	address,
		uint8_t	value
	)

Function for writing a single byte to RRAM.

To determine if the last RRAM write operation has been completed, use nrfx_rramc_ready_check(). The status is not updated during writes to write-buffer.

Note: Depending on the source of the code being executed, the CPU may be halted during the operation. Refer to the Product Specification for more information.

Parameters

[in]	address	Address to where data is to be written.
[in]	value	Value to be written.

◆ nrfx_rramc_bytes_write()

void nrfx_rramc_bytes_write	(	uint32_t	address,
		void const *	src,
		uint32_t	num_bytes
	)

Function for writing consecutive bytes to RRAM.

To determine if the last RRAM write operation has been completed, use nrfx_rramc_ready_check(). The status is not updated during writes to write-buffer.

Note: Depending on the source of the code being executed, the CPU may be halted during the operation. Refer to the Product Specification for more information.

Parameters

[in]	address	Address to where data is to be written.
[in]	src	Pointer to data to be copied.
[in]	num_bytes	Number of bytes to be written.

◆ nrfx_rramc_init()

nrfx_err_t nrfx_rramc_init	(	nrfx_rramc_config_t const *	p_config,
		nrfx_rramc_evt_handler_t	handler
	)

Function for initializing the RRAMC driver instance.

Parameters

[in]	p_config	Pointer to the structure containing configuration.
[in]	handler	Event handler provided by the user.

Return values

NRFX_SUCCESS	Initialization was successful.
NRFX_ERROR_ALREADY	The driver has already been initialized.

◆ nrfx_rramc_memory_size_get()

uint32_t nrfx_rramc_memory_size_get ( void )

Function for getting the total RRAM size in bytes.

Note: The function will return FICR_INFO_RRAM_RRAM_Unspecified value if the total RRAM size cannot be determined based on the FICR data.

Returns: RRAM total size in bytes.

◆ nrfx_rramc_otp_word_read()

NRFX_STATIC_INLINE uint32_t nrfx_rramc_otp_word_read ( uint32_t index )

Function for reading a word from the OTP in UICR.

OTP is a region of the UICR present in some chips. This function must be used to read word data from this region since unaligned accesses are not available on the OTP RRAM area.

Parameters

[in] index Address (index) in OTP table from which a word is to be read.

Return values

The	contents at `index`.

◆ nrfx_rramc_otp_word_write()

NRFX_STATIC_INLINE bool nrfx_rramc_otp_word_write	(	uint32_t	index,
		uint32_t	value
	)

Function for writing a 32-bit word at index position to OTP region in UICR.

The OTP is only able to write '0' to bits in the UICR that are erased (set to '1'). It cannot rewrite a bit back to '1'. This function checks if the value currently residing at the specified index can be transformed to the desired value without any '0' to '1' transitions. If yes, then perform the write operation.

Parameters

[in]	index	Address (index) in OTP table to which a word it to be written.
[in]	value	Value to be written.

Return values

true	Word can be written into the specified OTP index address.
false	Word cannot be written into the specified OTP index address. Erase UICR or change index address.

◆ nrfx_rramc_ready_check()

NRFX_STATIC_INLINE bool nrfx_rramc_ready_check ( void )

Function for checking current RRAMC operation status.

The status is updated for all RRAMC operations except during read and writes to write-buffer.

Return values

true	Current operation is completed, and RRAMC is ready.
false	RRAMC is busy.

◆ nrfx_rramc_reconfigure()

nrfx_err_t nrfx_rramc_reconfigure ( nrfx_rramc_config_t const * p_config )

Function for reconfiguring the RRAMC driver instance.

Parameters

[in] p_config Pointer to the structure containing configuration.

Return values

NRFX_SUCCESS	Reconfiguration was successful.
NRFX_ERROR_INVALID_STATE	The driver is uninitialized.

◆ nrfx_rramc_word_read()

NRFX_STATIC_INLINE uint32_t nrfx_rramc_word_read ( uint32_t address )

Function for reading a 32-bit word from the RRAM.

Use this function in case accessing the RRAM gives the possibility to run the code in an environment where the flash is simulated.

Parameters

[in] address Address of the word to be read.

Returns: Value read from RRAM.

◆ nrfx_rramc_word_write()

void nrfx_rramc_word_write	(	uint32_t	address,
		uint32_t	value
	)

Function for writing a 32-bit word to RRAM.

To determine if the last RRAM write operation has been completed, use nrfx_rramc_ready_check(). The status is not updated during writes to write-buffer.

Note: Depending on the source of the code being executed, the CPU may be halted during the operation. Refer to the Product Specification for more information.

Parameters

[in]	address	Address to where data is to be written. Must be word-aligned.
[in]	value	Value to be written.

◆ nrfx_rramc_words_write()

void nrfx_rramc_words_write	(	uint32_t	address,
		void const *	src,
		uint32_t	num_words
	)

Function for writing consecutive 32-bit words to RRAM.

To determine if the last RRAM write operation has been completed, use nrfx_rramc_ready_check(). The status is not updated during writes to write-buffer.

Note: Depending on the source of the code being executed, the CPU may be halted during the operation. Refer to the Product Specification for more information.

Parameters

[in]	address	Address to where data is to be written. Must be word-aligned.
[in]	src	Pointer to data to be copied. Must be word-aligned.
[in]	num_words	Number of words to be written.

◆ nrfx_rramc_write_enable_check()

bool nrfx_rramc_write_enable_check ( void )

Function for checking if write mode is enabled.

Returns: True if write mode is enabled, false otherwise.

◆ nrfx_rramc_write_enable_set()

void nrfx_rramc_write_enable_set	(	bool	enable,
		uint32_t	write_buff_size
	)

Function for enabling write mode and setting size of write buffer.

Parameters

[in]	enable	True if write mode is to be enabled, false otherwise.
[in]	write_buff_size	Size of write buffer. If set to 0, buffering is disabled.

Data Structures

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

◆ NRFX_RRAMC_DEFAULT_CONFIG

Typedef Documentation

◆ nrfx_rramc_evt_handler_t

Function Documentation

◆ nrfx_rramc_all_erase()

◆ nrfx_rramc_buffer_read()

◆ nrfx_rramc_byte_read()

◆ nrfx_rramc_byte_write()

◆ nrfx_rramc_bytes_write()

◆ nrfx_rramc_init()

◆ nrfx_rramc_memory_size_get()

◆ nrfx_rramc_otp_word_read()

◆ nrfx_rramc_otp_word_write()

◆ nrfx_rramc_ready_check()

◆ nrfx_rramc_reconfigure()

◆ nrfx_rramc_word_read()

◆ nrfx_rramc_word_write()

◆ nrfx_rramc_words_write()

◆ nrfx_rramc_write_enable_check()

◆ nrfx_rramc_write_enable_set()