In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdg8934 wrote:

OK Great. I think I understand. 
 



[quote="PJ Allen"]

[code]
TRIS_B = $00 


R1         var  byte
R2         var  byte
G1         var  byte
G2         var  byte
b_R1       var  byte
b_R2       var  byte
b_G1       var  byte
b_G2       var  byte
bitmask    var  byte
hotdog     var  byte 

  

PROGRAM Start 

  

Start: 

  

RB = 00 

  

chopomatic:
 
  bitmask = $80
   
  FOR hotdog = 1 TO 8
 
    B_R1 = R1 & bitmask           ' 0 or bitmask
    B_R1 = B_R1 / bitmask         ' 0 or 1
    RB.0 = B_R1 

    B_R2 = R2 & bitmask           ' 0 or bitmask
    B_R2 = B_R2 / bitmask         ' 0 or 1
    RB.1 = B_R2 

    B_G1 = G1 & bitmask     ' 0 or bitmask
    B_G1 = B_G1 / bitmask   ' 0 or 1
    RB.2 = B_G1 

    B_G2 = G2 & bitmask       ' 0 or bitmask
    B_G2 = B_G2 / bitmask     ' 0 or 1
    RB.3 = B_G2
    
   ' the RB bits have been set, ready to pulse clock for external latch
 
    Pulsout RB.7, 2     
           
    bitmask = bitmask / 2     ' 1_$40, 2_$20, 3_$10, 4_$08, 5_$04, 6_$02, 7_$01, 8_XX
  
    NEXT hotdog 

  END 

[/quote]
 

So according to PJ's program, I can coordinate the data pins as follows:

 

Display Board Port pin "R1" is connected to SX-28 pin RB.0

Display Board Port pin "R2" is connected to SX-28 pin RB.1

Display Board Port pin "G1" is connected to SX-28 pin RB.2

Display Board Port pin "G2" is connected to SX-28 pin RB.3

 

Display Board Port pin "CK" (Clock) is connected directly to SX-28 pin RB.7

 

 

Finally

 

Display Board Port pin "A" is connected directly to SX-28 pin RA.0

Display Board Port pin "B" is connected directly to SX-28 pin RA.1

Display Board Port pin "C" is connected directly to SX-28 pin RA.2

Display Board Port pin "D" is connected directly to SX-28 pin RA.3

 

Display Board Port pin "EN" (Enable) is connected directly to ground

 

Display Board Port pin "ST" (Latch) is connected directly (to SX-28 pin RB.5 [i]or RB.6[/i])

 

Add a statement like [i]PULSEOUT RB.5, 2[/i] after the FOR NEXT "hotdog" loop. 

 

 

If this is correct, I will try this tomorrow night after work. 

 

 


Thanks!

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