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Am335x Boot application problem for help

STONE @stone@
Intellectual 470 points


Hi all,

My application is base on the starware without OS.

I want to boot the Am335x from SD or Nand for test. and i practice SD boot firstly. step as follows:

i: Prepare the MLO from compile the bootloader in release SDMMC mode,and get the xx_ti.bin,change the name to MLO.

ii:Prepare the app.  import the demo in CCS,  C:\ti\AM335X_StarterWare_02_00_01_01\build\armv7a\cgt_ccs\am335x\evmAM335x\gpio_backlight, and then compile, get the gpioLCDBacklight_ti.bin which located in C:\ti\AM335X_StarterWare_02_00_01_01binary\armv7a\cgt_ccs\am335x\evmAM335x\gpio_backlight\Release,change it's name to app.

iii: Format the SD card,copy the MLO and the app,insert the card and reset board.

Unfortunately,the conslole print the message as follows,

CCCCCCCCStarterWare AM335x Boot Loader

Copying application image from MMC/SD card to RAM

............................................

Jumping to StarterWare Application...

 But the code don't execute, the led is always off

Could anyone give me some advice kindly? Thanks!

Regards,

Stone

 

  • 0
    Genius 5820 points

    I'd recommend to add some UART-output to the very beginning your LED-app, so you can see within the console if it was really started or not.

    In case not: did you set up your "app" file using tiimage-tool and correct base address?

  • 0 in reply to qxc
    Intellectual 470 points

    Thanks for your reply.

    I didn't use the tiimage-tool , yet i check the "app" whose Header.address=0x8000_0000 .

    By the way, how to use the  tiimage-tool ? when i double click the  tiimage.exe, it just flashed across and no any dilog box,i don't know why?

    Thanks!

  • 0 in reply to STONE @stone@
    Genius 5820 points

    Please check out this description: http://processors.wiki.ti.com/index.php/AM335X_StarterWare_Booting_And_Flashing#Usage_of_ti_image_Tool

    To make it short: tiimage 0x80000000 NONE yourapp.bin app

  • 0 in reply to qxc
    Intellectual 470 points

    For Windows

    1. Open command prompt
    2. Go to /tools/ti_image
    3. If the tiimage.exe is not available, generate one with Cygwin or MingW environvment using the command "gcc tiimage.c -o tiimage"
    4. Execute the image converter by giving proper inputs in the format, tiimage.exe <load address> <boot mode> <input image path/name> <output image path/name> 
    • Examples
    • tiimage.exe 0x402F0400 MMCSD boot.bin MLO
    • tiimage.exe 0x80000000 NONE uartEcho.bin app

    Frankly speaking ,i don't know how to open command prompt ,could you give me some picture to illustrate? 

    Thanks!

  • 0 in reply to STONE @stone@
    Intellectual 470 points

    Throgh the test,i found the xx_ti.bin can be used from compiling in ccs directly,and during the SD boot test i meet a *** question, the app code as follows,

    int main()

    {  

       UARTPuts("\r\nStone test 1 ...\r\n", -1);

        /* Enabling functional clocks for GPIO1 instance. */    

       GPIO1ModuleClkConfig();

        /* Enabling the GPIO module. */    

    GPIOModuleEnable(GPIO_INSTANCE_ADDRESS);

     GPIOModuleReset(GPIO_INSTANCE_ADDRESS);

        /* Setting the GPIO pin as an output pin. */  

    GPIODirModeSet(SOC_GPIO_1_REGS,26,0); //0:output;1:input    

    UARTPuts("\r\nStone test 2 ...\r\n", -1);    

    while(1)    

    {        

    /* Driving a logic HIGH on the GPIO pin. */        

    GPIOPinWrite(GPIO_INSTANCE_ADDRESS,26,GPIO_PIN_HIGH);        

    Delay(0x3FFFF);

            /* Driving a logic LOW on the GPIO pin. */        

    GPIOPinWrite(GPIO_INSTANCE_ADDRESS,26,GPIO_PIN_LOW);        

    Delay(0x3FFFF);    

    }

    Insert the card, the uart message was printed correctly,but the Gpio doesn't work at all. Why?

    And if i debug the   .out file in CCS, it can work normally and the led blinks.

    Could anyone give me  advice?

    Thanks!

    }

  • 0 in reply to STONE @stone@
    Expert 1320 points

    ok.  i followed this procedure, and i got the message:

    StarterWare AM335x Boot Loader

    Copying application image from MMC/SD card to RAM

    Jumping to StarterWare Application...

    then nothing happens.  but i am happy that the bootloader is now operational!!!  i will study the docs further.  i am running the gpioblink example. 

    thanks...........dd

  • 0 in reply to STONE @stone@
    Expert 1320 points

    GPIOPinMUX?  where is this function defined?