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Messages - riaz

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« on: September 15, 2014, 04:02:52 AM »
Iíve had a similar problem with parallel interface (6800), which may be due to me not controlling CS line (lack of i/o pins made me tie that pin  permanently LOW and RES High, this i will verify soon ). i found the command instructions worked fine but data instruction had a problem.

try issuing  command(0xA4) and command(0xA5) and see what happens.

Iím currently using 4 wire spi interface, which works fine.  i will return back to parallel just as soon as i have sorted out other aspects of my project.

OLEDs / Re: NHD-2.8-25664 OLED Display
« on: September 12, 2014, 06:39:11 AM »
i will give that a go, just as soon as i can, and will report back

many thanks

OLEDs / Re: NHD-2.8-25664 OLED Display
« on: September 10, 2014, 05:45:17 AM »
thanks for your response.

if anything, timings are too slow (in ms) i will speed this up later.
i have since my previous post, modified my hardware and s/w for test purposes, to 4 wire spi. that works fine. i'm displaying stuff on the screen.

however i would like to use the parallel interface.
the only thing i can think of it that i have tied RES (high) and CS(low). i am not controlling those pins (lack of i/os at present). could that be the problem?

OLEDs / Re: NHD-2.8-25664 OLED Display
« on: September 08, 2014, 11:08:52 AM »
when i said the screen has some pixels lit (randomly) it actually looks much like The Matrix screen saver.

OLEDs / NHD-2.8-25664 OLED Display
« on: September 08, 2014, 10:57:39 AM »
hi everyone,

i am using an oled in my project but am have great difficulty in getting it to work.

i am using parallel 6800 interface.

i can send command oxA4  and the display goes all blank.
i then send command 0xA5 and display all lit.

i have used the init sequence as per data sheet and i get display showing some pixels while other and un-lit (semi random).

i have noticed,  after sending data (instruction)  the next command instruction is ignored. this leads me to thinks there is problem with my sending data command.

i can't see much difference between command and data instruction except the DC line.

i have  run Checkerboard_25664() and i get nothing.

please help

many thanks

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