[minima] Re: Saving arduino lines
- From: Sunil Thomas Thonikuzhiyil <vu2swx@xxxxxxxxx>
- To: minima@xxxxxxxxxxxxx
- Date: Tue, 25 Feb 2014 09:18:29 +0530
You can cascade i2c
On Tue, Feb 25, 2014 at 4:58 AM, <farhanbox@xxxxxxxxx> wrote:
> Sunil,
> The I2C interface is already being used for the Si570. Yes, it is good
> idea to draw out the lines to interface is to other things.
>
> - f
> Sent from BlackBerry® on Airtel
> ------------------------------
> *From: * Sunil Thomas Thonikuzhiyil <vu2swx@xxxxxxxxx>
> *Sender: * minima-bounce@xxxxxxxxxxxxx
> *Date: *Tue, 25 Feb 2014 01:04:27 +0530
> *To: *<minima@xxxxxxxxxxxxx>
> *ReplyTo: * minima@xxxxxxxxxxxxx
> *Subject: *[minima] Re: Saving arduino lines
>
> Farhan,
> We can even think of two extra pads on the i2c lines of the digital
> board. and leave the digital board design as it is. If any one wants to
> free up lines they can use the current lcd lines and wire an I2c module.
> The software needs only a slight change.
> Most of the I2c LCD adapter are based on
> PCF8574
> <http://www.nxp.com/documents/data_sheet/PCF8574.pdf>
>
> I think these adapters are widely available on ebay.com. I find one
> listing even on ebay.in for Rs 250.
>
> Sunil
>
>
> On Tue, Feb 25, 2014 at 12:34 AM, hcker2000 <hcker2000@xxxxxxxxx> wrote:
>
>> I am new but the I2C lcd seems like a great option to free up some lines.
>> The other option might be a shift register.
>>
>>
>> On Mon, Feb 24, 2014 at 1:59 PM, <farhanbox@xxxxxxxxx> wrote:
>>
>>> Sunil,
>>>
>>> The I2C boards are not uniformly available everywhere. The only boards
>>> available are the 16x2 lcd boards, they have a consistent interface and a
>>> stable arduni library
>>> - f
>>> Sent from BlackBerry® on Airtel
>>> ------------------------------
>>> *From: * Sunil Thomas Thonikuzhiyil <vu2swx@xxxxxxxxx>
>>> *Sender: * minima-bounce@xxxxxxxxxxxxx
>>> *Date: *Tue, 25 Feb 2014 00:23:24 +0530
>>> *To: *<minima@xxxxxxxxxxxxx>
>>> *ReplyTo: * minima@xxxxxxxxxxxxx
>>> *Subject: *[minima] Saving arduino lines
>>>
>>> Dear Farhan,
>>>
>>> The present design of digital board uses 6 Arduino lines for LCD
>>> alone.
>>> Why don't we use an I2c LCD instead. They are very cheap and the code
>>> needs only two line change. I2C lines can be shared with Si570. In effect
>>> we will save 6 lines. That will be enough for all future expansions.
>>>
>>> I am presently using this i2c adapter for all my arduino projects.
>>>
>>> http://www.aliexpress.com/item/Free-Shipping-New-5V-IIC-I2C-Serial-Interface-Board-Module-For-Arduino-1602-LCD-Display/1080407434.html
>>>
>>> I got PCB from Sandeep today. I will start building over next
>>> weekend. and will post the progress.
>>>
>>> Sunil ,VU2SWX
>>> PhD Scholar
>>> Vision and Image processing Lab
>>> Dept. of Electrical Engg
>>> IIT BOMBAY,India
>>>
>>> --
>>>
>>>
>>
>>
>>
>> --
>> Mike "hcker2000" Ashcraft
>> http://bigironinteractive.com
>>
>> <http://www.linkedin.com/in/mikeashcraft>
>>
>
>
>
> --
>
>
--
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