TM1812 Protocol 1 wire

horizontechno · Joined: 07 Oct 2011 Posts: 8

Hi

I need help for using TM1812 led driver from TITANMEC.

The protocol use 1 wire for data and the data protocol are
0 level 24US for reset, and after 96 bit ( 12 X 8 bit ) for led level.

The problem are the 0 and 1.

The 0 is |````|________| high for 320ns and low for 600ns

The 1 is |_______|`````| low for 600ns and high for 320ns

Is very fast

Can I use uart or spi to make this kind of data ?

Now I try with pic 18f4520 at 40MHz.

Thank for your help.

alain tanguay

horizontechno · Joined: 07 Oct 2011 Posts: 8

Sorry for my drawing i have make mistake this is the good one.

The 0 is |````|________| high for 320ns and low for 600ns.

The 1 is |¨¨¨¨¨¨¨|_____| low for 320ns and high for 600ns.

Alain

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

If you want help on writing a driver for a chip, then post a direct link
to the PDF file for the data sheet.

horizontechno · Joined: 07 Oct 2011 Posts: 8

The datasheet are only in Chinese, now is working, but i cannot change the PWM very fast ?

I looking to find which kind of protocol is this ? and if a can emulate with SPI UART or other ?

Thanks

Alain Tanguay

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

We don't have any link to a data sheet (in English).

So we can't help.