Led module P2 128*64 1/32 driver

#1

Hello,

I’m new in this forum and a newbie with led module.

I would like to do my own driver (with a PIC) for a PH2-128*64-32s-V1.0 led module.
the ship use for the P2 module is ICN2038S.
On the flat connector HUB75 only have only 3 address labeled A,B,C no pin D and E.
I have check the connectivity with the ground to be sure it was not an error on the silk screen of the board.

I have already do my driver for an P4 module 32*64 1/16scan with ABCD address line and it is working good. (but the ship use is a MBI5124).

but I don’t understand why for 1/32 scan they are only 3 adress bit ???

ca you help me to understand how it works?

#2

Take a look at these threads:

#3

thanks for your help.

I have add the 3 clock inside the latch pulse, but there is not a big difference.
I have now half of all display light on. 1 ligne on and the next off, I don’t use the ABC ligne correcly i think.
I don’t understand the use of these 3 ligne ABC because that give 8 cs posibilities and not 32 like the 1/32 scan write on the silk screen of the led module.

I have take off the plastic protection of the module to look where is connected the ABC ligne,
ABC ligne are connected to 8 RT5957SP, ligne A and B are common for all of the 8 RT5957SP and the C ligne si juste conected to the firts, the 8 RT5957 are chained (like a shift register) but I don’t yet find the datasheet of the RT5957SP, this is 16 pin componant

  • Ligne A is connected (via a buffer 74HC245) to the pin 3 of the 8 RT5957SP
  • Ligne B is connected (via a buffer 74HC245) to the pin 4 of the 8 RT5957SP
  • Ligne C is connected (via a buffer 74HC245) to the pin 2 of the 1st RT5957SP
    the 1st RT5957SP has pin 10 connected to the pin 2 of the second RT5957SP …

Pin 1 and 11 connected to VCC
Pin 9 connected to GND.

I have found the datashett of this componant on Raffar Technology
http://www.raffar.com.tw/product-display-page.php?mod=RT5957
http://www.88869188.com/uploads/201805/5b03e7bc77f3a.pdf
the datasheet is in chinis but with google traduction that is understanding

But There is no explication about the timing, I have send a email of the productor and I hope to receive a response.

#4

I haven’t researched the AB-addressing scheme, and don’t know what the C signal would be used for, but my understanding was that either A or B is used as a CLK signal going to the addressing chip, and the other one (B or A) is used as a DAT signal, so you shift in the address while the LAT signal is held high. Hopefully you can find out how these chips actually are used and get your panel working

#5

@vinowan PxMatrix may support those panels according to
https://github.com/2dom/PxMatrix/blob/master/PxMatrix.h#L261
and https://github.com/2dom/PxMatrix/blob/master/PxMatrix.h#L438
would you like to give it a shot and report back?

#6

I have received the datasheet of the RT5957 used for the addressing with pin A,B,C of the P2 led module and an note for the timing require.
the module use 8 chip RT5957 (shift register) for the 64 row of addressing (the P2 module is 128*64 led)
it need to use 1 data to 1 each 32 clock for adresing in the same time the 1st row of the upper and the 1rst row of the lower part of the dipslay. (I’m not sure that the 8 chip RT5957 use all of the 64 output or only 4 output of all RT5957 and each output is connected to the upper and the lower part of the module but that nothing change for then programmation).
pin A = Clock
pin B = BK (blank like a latch)
pin C = Data in
I don’t know if I can post the datasheet in the forum?

#7

here is the contact in “Raffar Technology Corp”
Oliga Lin oligalin@raffar.com.tw

#8

If PDF attachments aren’t working for you, email it to me and I’ll host it: hello@pixelmatix.com