2416 led matrix from shure electronics

bkbovard

i bought this 2416 led matrix pcb from shure electronics in china
it has spi interface and i can't figure how to get it to work
anybody have an idea
thanks bkb
·

Agent420

For future reference, it is helpful to provide some detail about the part you are asking questions about.· Sounds like you are talking about this one.

It took me a moment to understand the reasoning for multiple Chip Select lines, but I see that the board is designed to have a configurable address by using the dip switch so you can stack several of these cards together on a common data bus.

You'll probably have to write your own driver for this board, I see they refer to the interface as 'SPI like', but unlike std spi they provide different clocks for reading and writing.

The timing diagrams are your friend here - use them as a reference of how to create the signals you need.

I did something similar with a 16x32 led matrix from Futurelec.· The interface is not the same,· but perhaps my bit banging code may give you some idea.· Please keep in mind that ws my first ever Propeller program, so it's probably not the most efficient ;-)

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Post Edited (Agent420) : 8/21/2009 10:58:58 AM GMT

Forrest

This post from the SX forum may be helpful http://forums.parallax.com/showthread.php?p=810347

Agent420

OT - Those are some pretty cheap prices ;-)· Did shipping take a long time?

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bkbovard

no shipping was two weeks
this model has memory based led driver where there larger dissplays are raster driven

Roger Lee

@bkbovard Looks like that led matrix is sweet. Should be a lot of fun for you.

Also, was your original question about how to interface this with the propeller chip?
If you are asking in general about the display, a different Forum may get more results for you.

Roger

bkbovard

thank everyone i got it now its just a start

later bkb

CON
·· _CLKMODE = XTAL1 + PLL1X·····'·will run at 16x
·· _XINFREQ = 5_000_000
·············
PUB main | q, i
·· dira[noparse][[/noparse]0..2]~~
·· com
·· i := 0·
·· repeat·
···· q := l[noparse][[/noparse]i]
···· outa[noparse][[/noparse]0] := 1
···· outa[noparse][[/noparse]0] := 0
······· repeat 15
········· outa[noparse][[/noparse]1] := 0
········· outa[noparse][[/noparse]2] := (q >>= 1) & 1
········· outa[noparse][[/noparse]1] := 1
····· i++
····· if i == 192
········ i := 0···
pri com | w, i
···· i := 0
···· repeat 6
······ w := h[noparse][[/noparse]i]
······ outa[noparse][[/noparse]0] := 1
······ waitcnt(cnt + 10000)
······ outa[noparse][[/noparse]0] := 0
······ repeat 13
········· outa[noparse][[/noparse]1] := 0
········· outa[noparse][[/noparse]2] := (w >>= 1) & 1
········· outa[noparse][[/noparse]1] := 1
······ i++
······ waitcnt(cnt + 10000)
dat
h· word %0_0000_0000_0010
·· word %0_0011_0100_0010
·· word %0_0010_1000_0010
·· word %0_1000_0000_0010
·· word %0_1100_0000_0010
·· word %0_1100_0101_0010
··
l· word %1111_0000000_1010, %1111_1000000_1010, %1111_0100000_1010, %1111_1100000_1010
·· word %1111_0010000_1010, %1111_1010000_1010, %1111_0110000_1010, %1111_1110000_1010
·· word %1111_0001000_1010, %1111_1001000_1010, %1111_0101000_1010, %1111_1101000_1010
·· word %1111_0011000_1010, %1111_1011000_1010, %1111_0111000_1010, %1111_1111000_1010
·· word %1111_0000100_1010, %1111_1000100_1010, %1111_0100100_1010, %1111_1100100_1010
·· word %1111_0010100_1010, %1111_1010100_1010, %1111_0110100_1010, %1111_1110100_1010
·· word %1111_0001100_1010, %1111_1001100_1010, %1111_0101100_1010, %1111_1101100_1010
·· word %1111_0011100_1010, %1111_1011100_1010, %1111_0111100_1010, %1111_1111100_1010
·· word %1111_0000010_1010, %1111_1000010_1010, %1111_0100010_1010, %1111_1100010_1010
·· word %1111_0010010_1010, %1111_1010010_1010, %1111_0110010_1010, %1111_1110010_1010
·· word %1111_0001010_1010, %1111_1001010_1010, %1111_0101010_1010, %1111_1101010_1010
·· word %1111_0011010_1010, %1111_1011010_1010, %1111_0111010_1010, %1111_1111010_1010
·· word %1111_0000110_1010, %1111_1000110_1010, %1111_0100110_1010, %1111_1100110_1010
·· word %1111_0010110_1010, %1111_1010110_1010, %1111_0110110_1010, %1111_1110110_1010
·· word %1111_0001110_1010, %1111_1001110_1010, %1111_0101110_1010, %1111_1101110_1010
·· word %1111_0011110_1010, %1111_1011110_1010, %1111_0111110_1010, %1111_1111110_1010
·· word %1111_0000001_1010, %1111_1000001_1010, %1111_0100001_1010, %1111_1100001_1010
·· word %1111_0010001_1010, %1111_1010001_1010, %1111_0110001_1010, %1111_1110001_1010
·· word %1111_0001001_1010, %1111_1001001_1010, %1111_0101001_1010, %1111_1101001_1010
·· word %1111_0011001_1010, %1111_1011001_1010, %1111_0111001_1010, %1111_1111001_1010
·· word %1111_0000101_1010, %1111_1000101_1010, %1111_0100101_1010, %1111_1100101_1010
·· word %1111_0010101_1010, %1111_1010101_1010, %1111_0110101_1010, %1111_1110101_1010
·· word %1111_0001101_1010, %1111_1001101_1010, %1111_0101101_1010, %1111_1101101_1010
·· word %1111_0011101_1010, %1111_1011101_1010, %1111_0111101_1010, %1111_1111101_1010··

·· word %0000_0000000_1010, %0000_1000000_1010, %0000_0100000_1010, %0000_1100000_1010
·· word %0000_0010000_1010, %0000_1010000_1010, %0000_0110000_1010, %0000_1110000_1010
·· word %0000_0001000_1010, %0000_1001000_1010, %0000_0101000_1010, %0000_1101000_1010
·· word %0000_0011000_1010, %0000_1011000_1010, %0000_0111000_1010, %0000_1111000_1010
·· word %0000_0000100_1010, %0000_1000100_1010, %0000_0100100_1010, %0000_1100100_1010
·· word %0000_0010100_1010, %0000_1010100_1010, %0000_0110100_1010, %0000_1110100_1010
·· word %0000_0001100_1010, %0000_1001100_1010, %0000_0101100_1010, %0000_1101100_1010
·· word %0000_0011100_1010, %0000_1011100_1010, %0000_0111100_1010, %0000_1111100_1010
·· word %0000_0000010_1010, %0000_1000010_1010, %0000_0100010_1010, %0000_1100010_1010
·· word %0000_0010010_1010, %0000_1010010_1010, %0000_0110010_1010, %0000_1110010_1010
·· word %0000_0001010_1010, %0000_1001010_1010, %0000_0101010_1010, %0000_1101010_1010
·· word %0000_0011010_1010, %0000_1011010_1010, %0000_0111010_1010, %0000_1111010_1010
·· word %0000_0000110_1010, %0000_1000110_1010, %0000_0100110_1010, %0000_1100110_1010
·· word %0000_0010110_1010, %0000_1010110_1010, %0000_0110110_1010, %0000_1110110_1010
·· word %0000_0001110_1010, %0000_1001110_1010, %0000_0101110_1010, %0000_1101110_1010
·· word %0000_0011110_1010, %0000_1011110_1010, %0000_0111110_1010, %0000_1111110_1010
·· word %0000_0000001_1010, %0000_1000001_1010, %0000_0100001_1010, %0000_1100001_1010
·· word %0000_0010001_1010, %0000_1010001_1010, %0000_0110001_1010, %0000_1110001_1010
·· word %0000_0001001_1010, %0000_1001001_1010, %0000_0101001_1010, %0000_1101001_1010
·· word %0000_0011001_1010, %0000_1011001_1010, %0000_0111001_1010, %0000_1111001_1010
·· word %0000_0000101_1010, %0000_1000101_1010, %0000_0100101_1010, %0000_1100101_1010
·· word %0000_0010101_1010, %0000_1010101_1010, %0000_0110101_1010, %0000_1110101_1010
·· word %0000_0001101_1010, %0000_1001101_1010, %0000_0101101_1010, %0000_1101101_1010
·· word %0000_0011101_1010, %0000_1011101_1010, %0000_0111101_1010, %0000_1111101_1010·