AT90USB82 datasheet(25/28 Pages) ATMEL

25 / 28 page

7618C–AVR–07/08

RJMP

WAIT_SPMEN

;Wait for SPMEN flag cleared

/*F************************************************************************

* NAME: flash_fill_temp_buffer

*--------------------------------------------------------------------------

* PARAMS:

* data16 :

R16/R17: word to load in the temporary buffer.

* address:

R18/R19: address of the word.

* return:

none

*--------------------------------------------------------------------------

* PURPOSE:

* This function allows to load a word in the temporary flash buffer.

*--------------------------------------------------------------------------

* EXAMPLE:

* fill_temp_buffer(data16, address);

*--------------------------------------------------------------------------

* NOTE:

* the first paramater used the registers R16, R17

* The second parameter used the registers R18, R19

***************************************************************************

**/

flash_fill_temp_buffer:

MOV

R31,R19

;move adress to z pointer (R31=ZH R30=ZL)

MOV

R30,R18

MOV

R0,R17

;move data16 to reg 0 and 1

MOV

R1,R16

LDI

R20,(1<<SPMEN)

OUT SPMCSR, R20; r18 decides function

SPM

; Store program memory

RJMP

WAIT_SPMEN

; Wait for SPMEN flag cleared

;*F************************************************************************

; NAME: lock_wr_bits

;--------------------------------------------------------------------------

; PARAMS:

R16: value to write

;--------------------------------------------------------------------------

; PURPOSE:

;**************************************************************************

lock_wr_bits:

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