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usb_dev_bulk example make the program to be pend in while()

Young Geun Lim
Prodigy 205 points
Other Parts Discussed in Thread: OMAPL138, OMAP-L138

Hi, Everyone.

I'm using usb_dev_bulk example of OMAPL138_StarterWare_1_10_04_01 on my omap-L138 EVM Board.

It does work well in sending and receiving bulk data, but the problem is pended in while().

For example, i want to check a global variable in while() but as soon as i call USBDBulkInit() function, It is pended and It doesn't check this global variable anymore and i2c0 interrupt also doesn't work.

Is there anyone who can tell me how to solve this problem?

Thank You.

  • 0
    TI__Mastermind 43955 points

    Hi Young,

    Please help me understand your question. I would expect you to tell us what the objective is and what the problem is?

    Informations are missing like, which global variable? while loop in which function/file? what do you mean by pended/pending? What do you expect to happen which was pending?

    Do you try debugging through CCS?

     

    Regards,

    Shankari

     

  • 0 in reply to Shankari G
    Prodigy 205 points

    Thank you for your reply.

    I'm using usb_dev_bulk example of OMAPL138_StarterWare_1_10_04_01 to communicate with PC on CCS V.5.5.0.

    What i actually want to do is that when my board receives message from my PC, It works something. My board send and receive data with my PC well, but Some things that i can't understand happen on my board.

    Following is my questions

    1. when my board receive message from my PC, It call some functions related to I2C0. but as soon as it calls I2C0SendBlocking() function, my program is pended. So I traced this routine and i found this is waiting in while loop until 'txCompFlag'  is changed as '0' value, this 'txCompFlag' variable is changed by I2C0 interrupt handler. Once my program is pended, any interrupt handler don't work. I assigned interrupt usb device and I2C0 differently. I can't understand why usb device affect I2C0 interrupt.

    2. I want to process something like receiving key input on UART without using interrupt in while loop. but after  USBDBulkInit() function is called, my program is pended in while loop.

    For example.

    -------------------------

    USBDBulkInit(0, (tUSBDBulkDevice *)&g_sBulkDevice);

    while(uiExit){

    .. something input key event...

    }

    -------------------------

    Regards,

    Young-Geun, Lim