NXP Semiconductors KE1xF Series, Reference Manual, Page: 613 / 1483

Table 23-61. Parameters (continued)
Parameter Description
src Pointer to the source buffer of data that is to be programmed into the Program Once Field.
Lengthinbytes The length, in bytes (not words or long words) to be programmed. Must be word-aligned.
Table 23-62. Possible status response
Value Constant Description
4 kStatus_InvalidArgument Config or src pointers are NULL.
101 kStatus_FLASH_AlignmentError 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.
3. The requested Program Once field has already
been programmed to a non-FFFF value.
4. The requested sector crosses a flash block
boundary.
115 kStatus_FLASH_CommandNotSupported This function is not supported.
0 kStatus_Success This function has performed successfully.
Example:
Assume the Program Once Field has not been programmed before.
uint32_t expectedData = 0x78563412;
status_t status = FLASH_ProgramOnce(&flashInstance, 0, &expectedData, 4);
NOTE
For the choice of index and length, see the FTFA chapter in RM
for detailed information.
23.4.5.13 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:
Chapter 23 Kinetis ROM Bootloader
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
NXP Semiconductors 613