• State Not Answered
  • Locked Locked
  • Replies 11 replies
  • Subscribers 21 subscribers
  • Views 5202 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

RL-ARM mass storage sample and CD-ROM

meysam nabi

Hi my friends!

I've used RL-ARM mass storage code from sample codes of KEIL 4.03 on AT91SAM7S256.
when I attach it to PC , the system recognizes it as a flash disk, correctly;

now I want to change it to apear as a CD-ROM in windows.

I want to know any changes in code.

can anyone help me?

thanks for your help!

Parents
  • 0 in reply to Chinzei Tsuneo

    Hi my friend Tsuneo!

    I do what you post for me but , that didn't work .
    I changed what you said and I made an iso file and fetch the byte stream of it and changed the code according that (disk Image , size , . . . ) , but when I attach device to computer , my computer (explorer) goes to a wait sate and can't work with the device.

    thank my friend!

Reply
  • 0 in reply to Chinzei Tsuneo

    Hi my friend Tsuneo!

    I do what you post for me but , that didn't work .
    I changed what you said and I made an iso file and fetch the byte stream of it and changed the code according that (disk Image , size , . . . ) , but when I attach device to computer , my computer (explorer) goes to a wait sate and can't work with the device.

    thank my friend!

Children
  • 0 in reply to meysam nabi

    Hi Mr Chinzei.

    Me and my friend Meysam were working around your solution to make our USB Mass storage device a CD-ROM.

    BUt As we started the work, lots of problems poped out.

    we changed the PDT and Sector size as you guided. We also implemented the following commands as you said: * Read12 * Write12 * Start/Stop unit * Read TOC

    Then we loaded an image of a sample CD into device memory.

    But it seams we can't get it to work, So I think we have to check it out with the standard specifications.

    We searced for some guides or references about this matter and this is what we found:

    SCSI Multimedia commands from T10.org.

    What i see in here is 6 different versions of MMC commands. I looked in MMC-4 and there's alot of commands for CD-ROM devices in it which I can't get why and how you only choosed a subset of these commands for us to implement.

    I am wondering now, whether you know an implementation guidance or a book in which the essential steps for making a CD-ROM device is explained or you use the T10 references too.

    Do you know any useful book or guide for my problem?