tms320f28027 LCD progaming and selection of XDSv100

Hi Ashutosh,

Ashutosh Pailwan1 said:

1. LCD display ( can u guide me for interfacing it any programming example ) as it is parallel port so I have to engage 10 pins for it

There are no sample projects for LCD interface. You can go through this links:

http://e2e.ti.com/support/microcontrollers/c2000/f/171/t/324796.aspx

Ashutosh Pailwan1 said:

2. Three ADC port

3. 10 gpio for my application

No problem, F28027 is very well equipped with multiple ADCs and GPIOs. Check the datasheet for more info.

Ashutosh Pailwan1 said:

4. Is it required to leave gpio idle to load programming using XDSv100 (how many pins are required of tms chip )

Check this out:

Ashutosh Pailwan1 said:

5. Which XDSv100 should I procure to load programming 14 pin or 20 pin

14-pin is sufficient. If you're planning to use the emulator for other families then 20-pin would be suitable. Hence choose accordingly.

Regards,

Gautam

Dear

The Link you are referring for LCD interfacing indicates that with C200 LCD parallel port interfacing is not possible.

As we are into manufacturing new product ( power factor controller) .

Our major objective is to have cheaper and less components to optimise our design.

Can you suggest any other chip suitable for our application As this one is about Rs 400 in element 14 website. 

If we have to go with this same one how to interface paralle port LCD

Please suggest

Ashutosh Pailwan1 said:

Can you suggest any other chip suitable for our application As this one is about Rs 400 in element 14 website. 

F28020 seems to be a cheaper option but do check whether the specs suit your application

Ashutosh Pailwan1 said:

If we have to go with this same one how to interface paralle port LCD

Why not try the serial LCD? I'm using the same (from a different vendor) and they work really well. Here's an example (the cheaper ones):

http://robokits.co.in/shop/index.php?main_page=product_info&products_id=191

www.nex-robotics.com/index.php?option=com_virtuemart&page=shop.product_details&flypage=flypage.tpl&product_id=956&Itemid=45

Regards,

Gautam

dear Gautam,

Thanks for your  support.

I have gone to the serial LCD website, They are showing Rs 390 . However normal parallel port LCD is Rs 150 there is huge cost difference. If you dont mind , in view of cost can I still go with parallel port instead of serial port with TMS 320F28027 or 20.

Also cost of TMS 320F28020 is Rs 400 on element 14 website. How can I get at above price rate $ 2.2. for TSSOP package and if we go for above 25pcs they demand Rs 337

http://in.element14.com/texas-instruments/tms320f28020dat/mcu-32bit-c2000-40mhz-tssop-38/dp/2325714?ref=lookahead

As cost is important point in my design.

dear

Please help me for parallel port LCD programming.

In microcntrollers we have 8 pins clubbed as ports hence it can be used for parallel port LCD. As the BCD conversion of the data to be send is convertred in to 8 bit, which can be sent to PORT, which is sent through eight pins connected to LCD.

However, In DSP such clubbed port concept is not there thus how to place the data at each pin which are connected to data input pins of LCD. Also the we have to do conversion of data to BCD first, but then how to assign it to each pins  which are furthere connected to parallel port LCD.

Please guide

Ashu, the scene here is time versus resources. I tried the same parallel LCD interface with F28335 for couple of days and felt like I was going no where :) Hence, preferred serial LCD at that point. Now I've a slave controller taking care of various communications (wired and wireless) and display (16x2, 20x4 and graphical) - Slave board. For me there were other critical tasks and hence didn't give the above further try! There are number of posts on this topic in this forum but none got the results....! Hence my personal opinion would be if you've ample amount of time, do work on the same and let us know if this is possible else switch to serial LCD and complete your project soon.

Regards,

Gautam