DSP56309EVM Freescale Semiconductor, DSP56309EVM Datasheet - Page 11

• Manufacturer Part Number: DSP56309EVM
• Description: KIT EVALUATION FOR XC56309
• Manufacturer: Freescale Semiconductor
• Type: DSPr

Specifications of DSP56309EVM

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Description/function: Audio DSPs
• Product: Audio Modules
• For Use With/related Products: DSP56309
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

load
_byte_loop
_word_loop
_sector_loop
CODE_SIZE
CODE_START
NUM_SEC
BOOT_END
;----------------------------------------------------------------------------
;
;
;
;
;
;
;
;
WR_FLASH ; disable_protect - Software data Protection routine
disable_protect
move_code
Freescale Semiconductor
move
move
move
move
dor
dor
dor
move
asr
movem
nop
move
move
move
jmp
WR_FLASH
This routine writes one 128-byte FLASH sector
enter with:
corrupts:
move
move
move
move
move
move
dor
move
nop
nop
move
lsr
move
lsr
move
nop
move
move
p:NUM_SEC,r3
p:CODE_START,r0
p:CODE_SIZE,r2
#$040080,r1
r3,_sector_loop
#42,_word_loop
#3,_byte_loop
x:(r1)+,a2
#8,a,a
a1,p:(r0)+
(r1)+
(r1)+
p:CODE_START,r1
(r1)
ds
ds
ds
equ
#>$8D,x0
x0,x:$45555
#>$72,x0
x0,x:$42AAA
#>$05,x0
x0,x:$45555
#42,move_code
p:(r0)+,a
a1,x:(r2)+
#8,a
a1,x:(r2)+
#8,a
a1,x:(r2)+
a1,x:(r2)+
a1,x:(r2)+
Using Symphony™ Studio with the DSP563xxEVM, Rev. 0
1
1
1
*
r2 pointing to starting FLASH Byte Address
r0 pointing to first DSP word to save
r0 - points to next P:memory location to save
r2 - points to next FLASH byte address to write a,b,x0
; number of sectors to read
; starting address of user code
; R2 contains the length of code in WORDS
; user code goes into FLASH at $040080
; get all sectors
; 42 words per FLASH sector
; each word requires 3 bytes
; Load byte from FLASH
; Shift 8 times to move byte into
; correct position.
; Stores 24-bit word into P mem
; dummy NOP to avoid do loop restrict.
; Jump to the users code
; user code size
; starting location of user code
; number of sectors to save
; $8D at DSP ==> $AA at FLASH
; Atmel address $5555
; $7d at DSP ==> $55 at FLASH
; Atmel address $2AAA
; $05 at DSP ==> $A0 at FLASH
; Atmel address $5555
;--- writes are now enabled
; move 128 bytes
; get byte from SRAM
; move low byte to FLASH
; move mid byte to FLASH
; move high byte to FLASH
; dummy write
; dummy write
Flash Memory Programming Code Description
11