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.
