8-bit MicrocontrollersのトピックRe: Software Library

Software Library

Andrew — Wed, 08 Mar 2006 16:42:57 GMT

Hallo people,

do you know were I can found C software library for HC(S)08? In particular, I'm searching software for driving LCD.

Thank you

Bye Bye

Re: Software Library

bigmac — Wed, 08 Mar 2006 17:26:06 GMT

Hello Andrew,

Have a look at Application Note AN2940, "LCD Driver for the HC08/HCS08 Family", and the associated software file. It covers both 4-bit and 8-bit interface modes for LCD displays based on the HD44780 device.

Regards,
Mac

Re: Software Library

joerg — Wed, 08 Mar 2006 21:33:50 GMT

Hi,

does it really have to bee in C? I have a module (.asm) for a 4bit mode driven LCD Display. You could include that in your project and call the routines with C code. Let me know.

Saluti joerg

Re: Software Library

Andrew — Wed, 08 Mar 2006 22:38:34 GMT

Hi Joerg,

I've to drive a grayscale 128*64 graphic display. If your code is able to drive this type of LCD, I can try to include it on my project.

Thanks a lot

Bye

Andrea

Re: Software Library

joerg — Wed, 08 Mar 2006 22:54:49 GMT

Sorry, but it is designed for character displays like BIGMAC mentioned before. But if you give my the type (datasheet) i will have a look on it.

Saluti joerg

Re: Software Library

Andrew — Wed, 08 Mar 2006 23:13:30 GMT

It's an OLED Display of OSRAM. It has an internal controler SSD0323 of SOLOMON.

Bye

Andrea

1-6 COD.pdf

Message Edited by t.dowe on 2009-10-20 01:48 PM

Re: Software Library

joerg — Thu, 09 Mar 2006 03:46:41 GMT

I had that look on the data sheet!
It is hard to find the datasheet for the SSD0323 so i do not know the commands. The interfacing of the display is easy: you need a 8bit IN/OUT port (DATA_PORT) for the data or commands and fout more bits for the signals. The BS1 pin of the display can be hardwired to "1" for selecting the so called "80" mode (which i would prefer) named because the micros with 80... (form 8080, Z80, ....) have this kind of control signals.
You need the following signals to handle:

D/C#: Data/Command 1=Data/0=Command
CS#: Chip select
WR#: Write signal
RD#: Read signal

D0..D7: DATA_PORT

On the start set CS#, WR#, RD# =1

The timing is not critical since by bitbanging you will never reach the maximum speed!

The D/C# line has to be put to 1 if the routines are handling data and to 0 for commands.

Here the READ sequence:

DATA_PORT as output
RD# 1->0
CS# 1->0
LDA DATA_PORT
CS# 0->1
RD# 0->1

the result is in A!

AND here the WRITE sequence:

DATA in A!

DATA_PORT as input
WR# 1->0
CS# 1->0
STA DATA_PORT
CS# 0->1
RD# 0->1

done.

So i would write four routines like: (in C or assembly)

READ_COMMAND(COMM);
WRITE_COMMAND(COMM);
READ_DATA(DAT);
WRITE_DATA(DAT);

If you tell me the type of the micro and find the datasheet, i can tell you more.

Saluti joerg

Re: Software Library

Vidya — Sat, 10 Jun 2006 10:37:44 GMT

Hi Joerg,

I'm working with OLED 128x64. I can scan the columns correctly. but the rows are not incrementing properly.. please help me.

Vidya..

Re: Software Library

Q_man — Fri, 29 Sep 2006 14:13:10 GMT

Vidya,

I have a OLED 128x64 (OSRAM Pictiva) on my desk and it works fine (NOW)

regarding the row incrementing there is one setting which is critical for that:

OLED_WriteCmd(OLED_SETDISPLAYOFFSET); // 0xA2

OLED_WriteCmd(0x44);

the 0x44 depends on the specific display

Q-man

Re: Software Library

nagi — Tue, 06 Nov 2007 04:00:54 GMT

Hi;
I am working on OSRAM OLED display in my current project. Just wondering has anybody implemented screen saver for these OLED displays. If so could you please post the algorithm.

regards
Nagi