Hi,
How to download a bitmap pictureonto LightCrafter4500 and project it? Just like the way of LightCrafter3000?
It seems that we could only choose internal flash images.
Best Regards,
He
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Hi,
How to download a bitmap pictureonto LightCrafter4500 and project it? Just like the way of LightCrafter3000?
It seems that we could only choose internal flash images.
Best Regards,
He
Hello He,
It is possible to download a bitmap image into LightCrafter 4500 and project it. It's little different than how you would do it in LightCrafter 3000.
The difference here is you have to create a 24-bit bitmap image using the Create Image tab under Images/Firmware tab in the GUI first. Then this .bmp image file needs to be added to the firmware file. Then the new firmware file needs to be uploaded to the LightCrafter 4500 using Fimrware Upload tab. This compresses the bitmap image and stores it into the flash at the next available flash index. Once its uploaded in the flash, you can then project it from the internal flash image in the Video mode.
Refer to section 3.6 of the User's guide to understand the details of storing images in the internal flash.
Regards
Manasi
Hi Manasi:
I‘m trying to download a bitmap image into LightCrafter 4500 ,but when i do the steps following the guid,it's impossible to add .bmp image file to the firmware file. It requests the file with suffix of .img or .bin ,how can i do?
Hello Jiang,
This is how you can download a bitmap image into Lightcrafter4500 and then project it using video mode:
Hope this helps. Let me know if you have any more questions.
Regards
Manasi
Hi,
We need to display a sequence of bitmaps and these will change on each batch run. What are the practical implications of re-creating and updating the firmware for each batch e.g. limited lifetime read/write cycles, flashing time etc.?
According, http://e2e.ti.com/support/dlp__mems_micro-electro-mechanical_systems/f/924/p/299354/1074397.aspx#1074397 (where I have also posted), theoretically we could store up to 1536 monochrome images for each batch so far a very large batch e.g. 3000 images we could have to update the flash multiple times - how long approximately would it take to upload a new flash?
Regards
Evan
Evan,
This is to let you know that your question has been received. I am not able to offer a complete answer to it right away.
A partial answer: I presume that you can automate the process of preparing the firmware upload with scripts, or under program control. However, the time to upload the firmware can take quite a few seconds to accomplish.
At this moment, I do not have any data on the read/write cycle lifetime of the Flash memory.
Pascal,
Thanks for the reply. As an update, I've subsequently found out that we could have up to 13,600 images in a batch (I updated my question in the other forum but not this one). This seems to imply that the firmware updates are impractical and we will need to look at a solution using a microprocessor. This in itself is not a problem but we are basically trying to work out the simplest microprocessor capable of operating the Lightcrafter in pattern mode (all current options are complex embedded linux systems). Each image will be projected for approximately 1 second.
Yes, we should have the ability to script the firmware updates.
Evan
Evan,
Since you have such a high number of patterns, and such a low frame rate, I do not think that this is well suited to the Stored Pattern mode. I suggest that you look at generating the patterns externally and using the LightCrafter 4500 external pattern mode. The patterns would be supplied to the LCr over the HDMI (DVI-D) input. Have you considered or looked at this mode?
Pascal,
We are currently using external video mode over HDMI from a Raspberry PI. External pattern mode would be fine - the question we have, if we don't use a Raspberry PI or other embedded linux system, what is the lowest spec (i.e. simplest) hardware we can use for this mode? What embedded hardware are people typically using to generate patterns?
Evan
Hi Evan,
As the processing source can generate the patterns quickly enough and has a DVI-D compliant video output or an RGB888 port if interfacing directly with the DLPC350, there are no minimum hardware requirements.
Best regards,
Blair
Hi Blair,
Thanks for the response. What we are trying to work out is what would are actual processors that can be used as a source, ideally based off examples that other people have used successfully. We'd then aim to choose the option that is the simplest / lowest cost. Any tips?
Cheers
Evan
Hi Evan,
I'm not familiary with all of TI's processors so I recommend browsing the TI Embedded Processors page to find a suitable option.
http://www.ti.com/lsds/ti/dsp/embedded_processor.page
You could also start a thread within the Embedded Processor's E2E forum for recommendations. Searching through the forums could also provide good information. There are a few different processor forum, so I have listed them here.
Best regards,
Blair