SE - Secure Element#

SE_Response_t#

typedef uint32_t SE_Response_t

Possible responses to a command.

writeToFifo#

void writeToFifo (uint32_t value)

Write to FIFO.

SE_addDataInput#

void SE_addDataInput (SE_Command_t *command, SE_DataTransfer_t *data)

Add input data to a command.

This function adds a buffer of input data to the given SE command structure The buffer gets appended by reference at the end of the list of already added buffers.

Note

• Note that this function does not copy either the data buffer or the buffer structure, so make sure to keep the data object in scope until the command has been executed by the secure element.

SE_addDataOutput#

void SE_addDataOutput (SE_Command_t *command, SE_DataTransfer_t *data)

Add output data to a command.

This function adds a buffer of output data to the given command structure The buffer gets appended by reference at the end of the list of already added buffers.

Note

• Note that this function does not copy either the data buffer or the buffer structure, so make sure to keep the data object in scope until the command has been executed by the secure element.

SE_addParameter#

void SE_addParameter (SE_Command_t *command, uint32_t parameter)

Add a parameter to a command.

This function adds a parameter word to the passed command.

Note

• Make sure to not exceed SE_MAX_PARAMETERS.

SE_executeCommand#

void SE_executeCommand (SE_Command_t *command)

Execute the passed command.

This function starts the execution of the passed command by the secure element. When started, wait for the RXINT interrupt flag, or call SE_waitCommandCompletion to busy-wait. After completion, you have to call SE_readCommandResponse to get the command's execution status.

SE_isCommandCompleted#

bool SE_isCommandCompleted (void)

Check whether the running command has completed.

This function polls the SE-to-host mailbox interrupt flag.

Returns

• True if a command has completed and the result is available

SE_readCommandResponse#

SE_Response_t SE_readCommandResponse (void)

Read the status of the previously executed command.

This function reads the status of the previously executed command.

Note

• The command response needs to be read for every executed command, and can only be read once per executed command (FIFO behavior).

Returns

• One of the SE_RESPONSE return codes: SE_RESPONSE_OK when the command was executed successfully or a signature was successfully verified.

SE_waitCommandCompletion#

void SE_waitCommandCompletion (void)

Wait for completion of the current command.

This function "busy"-waits until the execution of the ongoing instruction has completed.

SE_disableInterrupt#

void SE_disableInterrupt (uint32_t flags)

Disable one or more SE interrupts.

SE_enableInterrupt#

void SE_enableInterrupt (uint32_t flags)

Enable one or more SE interrupts.

SE_RESPONSE_MASK#

#define SE_RESPONSE_MASK

0x000F0000UL

Response status codes for the Secure Element.

SE_RESPONSE_OK#

#define SE_RESPONSE_OK

0x00000000UL

Command executed successfully or signature was successfully validated.

SE_FIFO_MAX_PARAMETERS#

#define SE_FIFO_MAX_PARAMETERS

13U

Maximum amount of parameters supported by the hardware FIFO.

SE_DATATRANSFER_STOP#

#define SE_DATATRANSFER_STOP

0x00000001UL

Stop datatransfer.

SE_DATATRANSFER_DISCARD#

#define SE_DATATRANSFER_DISCARD

0x40000000UL

Discard datatransfer.

SE_DATATRANSFER_REALIGN#

#define SE_DATATRANSFER_REALIGN

0x20000000UL

Realign datatransfer.

SE_DATATRANSFER_CONSTADDRESS#

#define SE_DATATRANSFER_CONSTADDRESS

0x10000000UL

Datatransfer Const Address.

SE_DATATRANSFER_LENGTH_MASK#

#define SE_DATATRANSFER_LENGTH_MASK

0x0FFFFFFFUL

Stop Length Mask.

SE_MAX_PARAMETERS#

#define SE_MAX_PARAMETERS

4U

Maximum amount of parameters for largest command in defined command set.

SE_DATATRANSFER_DEFAULT#

#define SE_DATATRANSFER_DEFAULT

Default initialization of data transfer struct.

SE_COMMAND_DEFAULT#

#define SE_COMMAND_DEFAULT

Default initialization of command struct.