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22.4.5.13 FLASH_ReadOnce
Reads a certain flash Program Once Field according to parameters passed by index and
length.
For targets that do not support FLASH_ReadOnce, the value of the FLASH_ReadOnce
pointer is 0.
Prototype:
status_t flash_read_once (flash_driver_t * driver, uint32_t index, uint32_t *dst, uint32_t
lengthInBytes);
Table 22-61. Parameters
Parameter
Description
Config
Pointer to
flash_config_t
data structure in memory, to store driver runtime state.
Index
Index for a certain Program Once Field.
dst
Pointer to the destination buffer of data that stores data reads from the Program Once Field.
Lengthinbytes
The length, in bytes (not words or long words) to be read. Must be word-aligned.
Table 22-62. Possible status response
Value
Constant
Description
4
kStatus_InvalidArgument
Config or dst pointers are NULL.
101
kStatus_FlashAlignmentError
Index or lengthInBytes is invalid.
103
kStatus_FLASH_AddressError
The following situation causes this response:
1. Command is not available under current mode/
security.
2. An invalid index is supplied.
115
kStatus_FLASH_CommandNotSupported
This function is not supported.
0
kStatus_Success
This function has performed successfully.
Example:
uint32_t temp;
status_t status = FLASH_ReadOnce(&flashInstance, 0, &temp, 4);
NOTE
For the choice of index and length, see the FTFA chapter in RM
for detailed information.
22.4.5.14 FLASH_ReadResource
Kinetis Flash Driver API
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
516
NXP Semiconductors
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