Nxp Semiconductors UM10237 用户手册

UM10237_2

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For in application programming the IAP routine should be called with a word pointer in 
register r0 pointing to memory (RAM) containing command code and parameters. Result 
of the IAP command is returned in the result table pointed to by register r1. The user can 
reuse the command table for result by passing the same pointer in registers r0 and r1. The 
parameter table should be big enough to hold all the results in case if number of results 
are more than number of parameters. Parameter passing is illustrated in the 

. The number of parameters and results vary according to the IAP 

command. The maximum number of parameters is 5, passed to the "Copy RAM to 
FLASH" command. The maximum number of results is 2, returned by the "Blankcheck 
sector(s)" command. The command handler sends the status code INVALID_COMMAND 
when an undefined command is received. The IAP routine resides at 0x7FFF FFF0 
location and it is thumb code.

The IAP function could be called in the following way using C.

3

DST_ADDR_ERROR

Destination address is not on a correct boundary.

4

SRC_ADDR_NOT_MAPPED

Source address is not mapped in the memory map. 
Count value is taken in to consideration where 
applicable.

5

DST_ADDR_NOT_MAPPED

Destination address is not mapped in the memory 
map. Count value is taken in to consideration 
where applicable.

6

COUNT_ERROR

Byte count is not multiple of 4 or is not a permitted 
value.

7

INVALID_SECTOR

Sector number is invalid or end sector number is 
greater than start sector number.

8

SECTOR_NOT_BLANK

Sector is not blank.

9

SECTOR_NOT_PREPARED_FOR_
WRITE_OPERATION

Command to prepare sector for write operation 
was not executed.

10

COMPARE_ERROR

Source and destination data not equal.

11

BUSY

Flash programming hardware interface is busy.

12

PARAM_ERROR

Insufficient number of parameters or invalid 
parameter.

13

ADDR_ERROR

Address is not on word boundary.

14

ADDR_NOT_MAPPED

Address is not mapped in the memory map. Count 
value is taken in to consideration where applicable.

15

CMD_LOCKED

Command is locked.

16

INVALID_CODE

Unlock code is invalid.

17

INVALID_BAUD_RATE

Invalid baud rate setting.

18

INVALID_STOP_BIT

Invalid stop bit setting.

19

CODE_READ_PROTECTION_
ENABLED

Code read protection enabled.