Help me, please, with data Flash paging

[igorl]

Posted on November 28, 2003 at 11:48

Help me, please, with data Flash paging

[igorl]

Posted on May 17, 2011 at 11:56

Hello,

I have several problems with paging data Flash in uPSD3212, using DK3 Here's it:

I'm gonna build two generators: one at PB0 and the second at PB1. The code is as follows:

$include (reg_upsd321x.inc); describe all uPSD registers

CSEG at 0

ljmp my_code_s

code_seg SEGMENT code

RSEG code_seg

my_code_s: mov WDKEY,55H; disable watchdog timer

mov IE,10010101b; enable UART0 interrupt

mov IEA,00010010b; enable UART1 interrupt

;

mov DPTR,802H; set pointer to a port A mode

mov A,00H; set data to 0H

movx @DPTR,A; port A is configured as I/O mode

;

mov DPTR,806H; set pointer to port A direction

mov A,00001111b; set 4-output and 4 input pins

movx @DPTR,A; set the port direction register

;

mov DPTR,803H; set pointer to a port B mode

mov A,00H; set data to 0H

movx @DPTR,A; port B is configured as I/O mode

;

mov DPTR,807H; set pointer to port B direction

mov A,0FFH; port B is set as output

movx @DPTR,A; configure port B

;

label: mov DPTR,8E0H; select page register

mov A,0H; select the page

movx @DPTR,A; set page '0' as current page

call proc;

mov A,1H;

movx @DPTR,A; set page '1' as current page

call proc;

mov A,2H;

movx @DPTR,A; set page '2' as current page

call proc;

mov A,3H;

movx @DPTR,A; set page '3' as current page

call proc;

ljmp label;

;&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

proc: mov DPTR,0C000H;

movx A,@DPTR;

mov DPTR,805H;

movx @DPTR,A;

mov DPTR,8E0H;

ret

END

I use pages 0,1,2 and 3 for paging (bits 0 and 1 in Page register). Data Flashes are difined from C000H up to FFFFH. Thus, I need to load all my data Flash segments with its own data file. I have them for each data Falsh block, thus, I don't need to change addresses in PSDSoft when merging hex-files. My hex-files are generated in the same compiler (Keil) and their textes are:

for the first hex

org 0C000H

DB 00000000b

END

for the second hex

org 0C000H

DB 00000001b

END

for the third hex

org 0C000H

DB 00000010b

END

and for the fourth hex

org 0C000H

DB 00000011b

END

When programming, PSDSoft programms all data flash regions.

Finally, when the program starts, I must see my two generators, where PB0 oscillates two times faster than PB1. Instead of this, I see series of short positive (relatively to negative) pulses at PB0 generator, but PB1 generator is absolutely silent.

Will you, please, answer, what I do wrong and how shall I do to get the expected result?

I created this project to learn paging and data flash operations.

Thank you in advance.

[jinguanghua]

Posted on May 17, 2011 at 11:56

Quote:

label: mov DPTR,#8E0H; select page register

mov A,#0H; select the page

movx @DPTR,A; set page '0' as current page

call proc;

mov A,#1H;

movx @DPTR,A; set page '1' as current page

call proc;

mov A,2H;

movx @DPTR,A; set page '2' as current page

call proc;

mov A,3H;

movx @DPTR,A; set page '3' as current page

call proc;

ljmp label;

before calling PROC sub, you need to save the data pointer of Page Register, it is changed.