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

I tried researching this on the forum and did not see anything similar to what I am trying to do. 
 

I am trying to control basically 4 sets of displays of LEDs that use multiple 74HC595s. What I need to do is something like this:

 

SHIFTOUT Dpin1, Clk, MSBFIRST, pattern1

SHIFTOUT Dpin2, Clk, MSBFIRST, pattern1


SHIFTOUT Dpin3, Clk, MSBFIRST, pattern1

SHIFTOUT Dpin4, Clk, MSBFIRST, pattern1

 

Low Strobe

:

:

 

As you can see there is Dpin1 to Dpin4 in the 4 SHIFTOUT commands. 

 

When I use a configuration like this I see the LEDs scroll correctly but are off by 8 LEDs between each display - as I would expect because pattern1 is 8 bits.

 

What I would like to do is modify SHIFTOUT or some other method to have all sets of LEDs scroll at the same time (not 8 LEDs off). 

 

Something like SHIFTOUT Dpin1, Dpin2, Dpin3, Dpin4, Clk, MSBFIRST, pattern1 would be nice but not possible using the standard SX/B SHIFTOUT command. 

 

I was going to try using 4 different Clk pins for each of the statements but havent tried that yet. Im thinking that won't work because of pattern1 still being 8 bits.

 

Any ideas how to acheive the same data shifting over 4 Datapins? 

 

Thanks.

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