.Location = command and then whatever you send to the device will be a
character buffer write (I think.)
DLC
jasuk1970 wrote:
> Thanks for pointing out the obvious :)
>
> I looked at the I2C write example and it said 0x28 switches backlight
> off (Figure 11), And it's actually 0x20!
>
> Wehoo it's working :)
>
> Well sort of, I think it's my programming skills lacking now :)
>
> Dim screen As oI2C
> Dim text As New oBuffer(20)
> Dim lp As Byte
>
> Sub Main()
> screen.Node = 0x28 ' 0x50 divided by 2
> screen.Mode = cv7Bit
> screen = 0x20 ' Backlight On
> Call CLS()
> text.VString="Hello World! "
> DisplayText()
>
> End Sub
>
> Sub DisplayText()
> screen.Mode = cv7Bit
> screen = 0x80 ' Send string
> For lp = 0 To 19
> text.Location = lp
> screen = text.Value
> Next lp
> End Sub
>
> Sub CLS()
> screen.Mode = cv7Bit
> screen = 0x8c
> End Sub
>
> Sub BackLightOff()
> screen.Mode = cv7Bit
> screen = 0x28
> End Sub
>
> The screen clears but I cannot get any text to appear.
>
> I think it is I don't understand the IC2 stuff just yet.
>
> Thanks for any help.
>
> Cheers,
>
> Jas
> --- In oopic@yahoogroups.com, ooPIC Tech Support <dennis.clark@...>
> wrote:
>
>> What should happen? The 0x28 command just turns the screen on.
>>
> Send
>
>> some text to it and see what happens. Carefully read through the
>> commands set and experiment. you should get something to go as
>>
> long as
>
>> you put in the pull up resistor on the SDA line as we said earlier
>>
> in
>
>> this thread.
>>
>> DLC
>>
>> jasuk1970 wrote:
>>
>>> Hi again.
>>>
>>> I've given this a go. I found a 3 pin cable which connected to
>>>
> the
>
>>> pins in the I2C connector.
>>>
>>> http://www.robotchat.org/images/lcd_oopic_1.JPG
>>>
>>> The white cable connects to pin 1 in the connector which is data,
>>>
> the
>
>>> black cable connects to pin 2 which is ground and the red cable
>>>
> which
>
>>> is the clock. I've connected these to the bread board:
>>>
>>> http://www.robotchat.org/images/lcd_oopic_2.JPG
>>>
>>> These then connect to the daughter board, Plus a +5 and Ground to
>>> power the board.
>>>
>>> http://www.robotchat.org/images/lcd_oopic_1.JPG
>>>
>>> These connect to the respective Data Ground and clock (top left)
>>>
> and
>
>>> +5, ground connect to the board to power it (bottom right). The
>>>
> dip
>
>>> switches are set to 00, which sets the IC2 address to 0x50
>>>
>>> The display then lights up when the power is connected.
>>>
>>> http://www.robotchat.org/images/lcd_oopic_4.JPG
>>>
>>> I now write the following program to send the command to switch
>>>
> off
>
>>> the back light:
>>>
>>> Dim screen As oI2C
>>>
>>> Sub Main()
>>> screen.Node = 0x28 ' 0x50 divided by 2
>>> screen.Mode = cv7Bit
>>> screen = 0x28
>>>
>>> End Sub
>>>
>>> Unfortunatly nothing seems to happen. Any ideas?
>>>
>>> Thanks,
>>>
>>> Jas
>>> --- In oopic@yahoogroups.com, <dennis.clark@> wrote:
>>>
>>>
>>>> Yon are correct in all of your guesses. Check the ooPIC site on
>>>>
>>>>
>>> the "connectors" page for the part number for that connector.
>>>
>>>
>>>> DLC
>>>>
>>>> ooPIC Tech Support
>>>>
>>>> -----Original Message-----
>>>>
>>>> From: "jasuk1970" <mail@>
>>>> Subj: [oopic] Re: NC2004A LCD Screen with Modtronix LCD2S
>>>>
> daughter
>
>>>>
>>>>
>>> board
>>>
>>>
>>>> Date: Fri Jan 25, 2008 3:31 am
>>>> Size: 3K
>>>> To: oopic@yahoogroups.com
>>>>
>>>> Thanks for the info. I'm going to give it a try as soon as I Can
>>>>
>>>>
>>> get
>>>
>>>
>>>> the I2C pins connected.
>>>>
>>>> I've posted a picture of the OOBoard with the hilighted sections
>>>>
>>>>
>>> from
>>>
>>>
>>>> the manual that came with the OOPic 5 compiler software in the
>>>>
>>>>
>>> files
>>>
>>>
>>>> section. It seems to have 2 I2C Ports on the board, One (in the
>>>> cluster of Various IO Ports labelled (Local Devices) and one
>>>>
>>>>
>>> labelled
>>>
>>>
>>>> Network. I am assuming that it's the local devices one I need to
>>>>
>>>>
>>> use.
>>>
>>>
>>>> Also does anyone recognise what the connector type is (Its the
>>>>
>>>>
>>> white
>>>
>>>
>>>> connectors) It has 5 pins. I've been trying to google for it,
>>>>
> but
>
>>>>
>>>>
>>> as
>>>
>>>
>>>> 5 pin connector is pretty vague thing to search for, I'm not
>>>>
> having
>
>>>> much luck. I have the pin information in the documentation so
>>>>
> could
>
>>>> end up soldering wires to the pins if need be.
>>>>
>>>> Cheers,
>>>>
>>>> Jas
>>>>
>>>> --- In oopic@yahoogroups.com, ooPIC Tech Support <dennis.clark@>
>>>> wrote:
>>>>
>>>>
>>>>> It's actually simpler than you are making this out to be. Set
>>>>>
>>>>>
>>> your
>>>
>>>
>>>> I2C
>>>>
>>>>
>>>>> address as they recommend, then divide this by 2 (bit shift
>>>>>
> right
>
>>>>>
>>>>>
>>>> one
>>>>
>>>>
>>>>> place) and this is the .node value. When you are sending data
>>>>>
> to
>
>>>>>
>>>>>
>>>> the
>>>>
>>>>
>>>>> device you would use cv10bit format and the .Location attribute
>>>>>
>>>>>
>>> is
>>>
>>>
>>>> the
>>>>
>>>>
>>>>> command, so you'd do this:
>>>>> dev.Mode = cv10bit
>>>>> dev.Node = <whatever address shifted right one bit>
>>>>> dev.Location = <command>
>>>>> dev = <data>
>>>>>
>>>>> When you are sending a command you would use this:
>>>>> dev.Mode = cv7bit
>>>>> dev = <command>
>>>>>
>>>>> That's it. If you are using an ooPIC R you don' t need to
>>>>>
> worry
>
>>>>>
>>>>>
>>>> about
>>>>
>>>>
>>>>> pull ups on the SCL line - Its already driven. The SDA line
>>>>>
>>>>>
>>>> should
>>>>
>>>>
>>>>> have a 4.7K pull up on it.
>>>>>
>>>>> DLC
>>>>>
>>>>> jasuk1970 wrote:
>>>>>
>>>>>
>>>>>> --- In oopic@yahoogroups.com, "rtstofer" <rstofer@> wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>> --- In oopic@yahoogroups.com, "jasuk1970" <mail@> wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> Cheers,
>>>>>>>>
>>>>>>>> I am looking at this now. I am trying to work out what Mode
>>>>>>>>
>>>>>>>>
>>> it
>>>
>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> should
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> be using.
>>>>>>>>
>>>>>>>> An example of the commands it is looking for to get the
>>>>>>>>
>>>>>>>>
>>> status
>>>
>>>
>>>> is:
>>>>
>>>>
>>>>>>>> SaaaaaaadAccccccccASaaaaaaadAbbbbbbbbP
>>>>>>>>
>>>>>>>> S= start
>>>>>>>> a= address bit (7 bits + direction)
>>>>>>>> d= read or write bit
>>>>>>>> A= acknowledgement from slave
>>>>>>>> c= command bit (8 bits)
>>>>>>>> b= First byte of data (8 bits)
>>>>>>>> P= stop
>>>>>>>>
>>>>>>>> If the address is 0x50 then it would look like:
>>>>>>>>
>>>>>>>> S01010000 A 11010000 A S01010001 A {Recieve first byte of
>>>>>>>>
>>>>>>>>
>>> data}
>>>
>>>
>>>>>>>> I hope it makes sense, Looking at it I am assuming it is
>>>>>>>>
>>>>>>>>
>>> cv7Bit.
>>>
>>>
>>>>>>>> Or would I need to do some custom controlling to get this
>>>>>>>>
>>>>>>>>
>>>> working?
>>>>
>>>>
>>>>>>>> Thanks for any help,
>>>>>>>>
>>>>>>>> Jas
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> I must be looking at the wrong datasheet because the one I am
>>>>>>>
>>>>>>>
>>>>>>>
>>>>
>>>> Yahoo! Groups Links
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> Yahoo! Groups Links
>>>
>>>
>>>
>>>
>>>
>> --
>> ------------------------------------------------------
>> Dennis Clark ooPIC Tech Support
>> www.oopic.com
>> ------------------------------------------------------
>>
>>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
--
------------------------------------------------------
Dennis Clark ooPIC Tech Support
www.oopic.com
------------------------------------------------------
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