Interrupts and flags management functions.
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Interrupts and flags management functions.
===============================================================================
##### Interrupts and flags management functions #####
===============================================================================
[..] This section provides functions allowing to configure the CRYP Interrupts and
to get the status and Interrupts pending bits.
[..] The CRYP provides 2 Interrupts sources and 7 Flags:
*** Flags : ***
===============
[..]
(#) CRYP_FLAG_IFEM : Set when Input FIFO is empty. This Flag is cleared only
by hardware.
(#) CRYP_FLAG_IFNF : Set when Input FIFO is not full. This Flag is cleared
only by hardware.
(#) CRYP_FLAG_INRIS : Set when Input FIFO Raw interrupt is pending it gives
the raw interrupt state prior to masking of the input FIFO service interrupt.
This Flag is cleared only by hardware.
(#) CRYP_FLAG_OFNE : Set when Output FIFO not empty. This Flag is cleared
only by hardware.
(#) CRYP_FLAG_OFFU : Set when Output FIFO is full. This Flag is cleared only
by hardware.
(#) CRYP_FLAG_OUTRIS : Set when Output FIFO Raw interrupt is pending it gives
the raw interrupt state prior to masking of the output FIFO service interrupt.
This Flag is cleared only by hardware.
(#) CRYP_FLAG_BUSY : Set when the CRYP core is currently processing a block
of data or a key preparation (for AES decryption). This Flag is cleared
only by hardware. To clear it, the CRYP core must be disabled and the last
processing has completed.
*** Interrupts : ***
====================
[..]
(#) CRYP_IT_INI : The input FIFO service interrupt is asserted when there
are less than 4 words in the input FIFO. This interrupt is associated to
CRYP_FLAG_INRIS flag.
-@- This interrupt is cleared by performing write operations to the input FIFO
until it holds 4 or more words. The input FIFO service interrupt INMIS is
enabled with the CRYP enable bit. Consequently, when CRYP is disabled, the
INMIS signal is low even if the input FIFO is empty.
(#) CRYP_IT_OUTI : The output FIFO service interrupt is asserted when there
is one or more (32-bit word) data items in the output FIFO. This interrupt
is associated to CRYP_FLAG_OUTRIS flag.
-@- This interrupt is cleared by reading data from the output FIFO until there
is no valid (32-bit) word left (that is, the interrupt follows the state
of the OFNE (output FIFO not empty) flag).
*** Managing the CRYP controller events : ***
=============================================
[..] The user should identify which mode will be used in his application to manage
the CRYP controller events: Polling mode or Interrupt mode.
(#) In the Polling Mode it is advised to use the following functions:
(++) CRYP_GetFlagStatus() : to check if flags events occur.
-@@- The CRYPT flags do not need to be cleared since they are cleared as
soon as the associated event are reset.
(#) In the Interrupt Mode it is advised to use the following functions:
(++) CRYP_ITConfig() : to enable or disable the interrupt source.
(++) CRYP_GetITStatus() : to check if Interrupt occurs.
-@@- The CRYPT interrupts have no pending bits, the interrupt is cleared as
soon as the associated event is reset.
| FunctionalState CRYP_GetCmdStatus |
( |
void |
| ) |
|
Returns whether CRYP peripheral is enabled or disabled.
- Parameters
-
- Return values
-
| Current | state of the CRYP peripheral (ENABLE or DISABLE). |
Definition at line 853 of file stm32f4xx_cryp.c.
| FlagStatus CRYP_GetFlagStatus |
( |
uint8_t |
CRYP_FLAG | ) |
|
Checks whether the specified CRYP flag is set or not.
- Parameters
-
| CRYP_FLAG | specifies the CRYP flag to check. This parameter can be one of the following values:
- CRYP_FLAG_IFEM: Input FIFO Empty flag.
- CRYP_FLAG_IFNF: Input FIFO Not Full flag.
- CRYP_FLAG_OFNE: Output FIFO Not Empty flag.
- CRYP_FLAG_OFFU: Output FIFO Full flag.
- CRYP_FLAG_BUSY: Busy flag.
- CRYP_FLAG_OUTRIS: Output FIFO raw interrupt flag.
- CRYP_FLAG_INRIS: Input FIFO raw interrupt flag.
|
- Return values
-
| The | new state of CRYP_FLAG (SET or RESET). |
Definition at line 883 of file stm32f4xx_cryp.c.
| ITStatus CRYP_GetITStatus |
( |
uint8_t |
CRYP_IT | ) |
|
Checks whether the specified CRYP interrupt has occurred or not.
- Note
- This function checks the status of the masked interrupt (i.e the interrupt should be previously enabled).
- Parameters
-
| CRYP_IT | specifies the CRYP (masked) interrupt source to check. This parameter can be one of the following values:
- CRYP_IT_INI: Input FIFO interrupt
- CRYP_IT_OUTI: Output FIFO interrupt
|
- Return values
-
| The | new state of CRYP_IT (SET or RESET). |
Definition at line 827 of file stm32f4xx_cryp.c.
| void CRYP_ITConfig |
( |
uint8_t |
CRYP_IT, |
|
|
FunctionalState |
NewState |
|
) |
| |
Enables or disables the specified CRYP interrupts.
- Parameters
-
| CRYP_IT | specifies the CRYP interrupt source to be enabled or disabled. This parameter can be any combination of the following values:
- CRYP_IT_INI: Input FIFO interrupt
- CRYP_IT_OUTI: Output FIFO interrupt
|
| NewState | new state of the specified CRYP interrupt. This parameter can be: ENABLE or DISABLE. |
- Return values
-
Definition at line 799 of file stm32f4xx_cryp.c.
Collaboration diagram for Interrupts and flags management functions:
1.8.10 
