In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Vertex78 wrote:

Here is the latest code that I have written trying to get it to work

; /////////////////////////////////////////////////////////////////////////////
; Set device attributes
; /////////////////////////////////////////////////////////////////////////////
DEVICE SX52
RESET Init
FREQ 80_000_000
DEVICE OSCHS3 ; High-speed external oscillator
DEVICE IFBD ; Crystal feedback disabled
DEVICE XTLBUFD ; Crystal drive disabled
;//////////////////////////////////////////////////////////////////////////////


; rb.0 = clr active low
; rb.1 = wr active low
; rb.2 = bl active low
; rb.3 = cue
; rb.4 = cu
; rb.5 = A0
; rb.6 = A1

clrd equ rb.0
wr equ rb.1
bl equ rb.2
cue equ rb.3
cu equ rb.4
a0 equ rb.5
a1 equ rb.6


init

mov !rd, #%00000000
mov !rb, #%00000000


Start

setb cu
setb bl
clrb cue
setb clrd

;digit address
clrb a0
clrb a1

;load ascii value
mov rd, #%01011010

;timing diagram shows address setup time as 10ns
nop ; 12.5 ns delay

clrb wr

;timing diagram shows write time as 90ns

jmp $+1 ;100ns delay
jmp $+1
nop
nop

setb wr

jmp $

ok when i run this code, if i hold the reset button it shows a Z in the right most position (which is what should be there with the programm running normal) and when I let go of the reset it shows all segments lit up in left most position. Though If i turn the xgs of and then back on sometime the Z will be lit up in the correct place but then if I hit the reset it goes to a random spot with jiberish. I think maybe my timimg must be off. But from what I can tell from their timing diagram its ok it you go over the amount of time it takes, like how data write says 90ns and I did 100ns since that is the closest I can get without going under 90ns.

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