AM335x Sys/Bios with DCAN example

Maximilian Partenfelder

Hi,

I started off using the SYS/BIOS "Typical" template with the GNU compiler. I imported the can_rx_tx demo app and started including all the required libs just to get the dependencies right.

Compilation works just fine and I was able to upload the code to my BBB.

Running my code, I encounter a crash as soon as it is calling the CONSOLEUtilsInit:

Void taskFxn(UArg a0, UArg a1)
{
    System_printf("enter taskFxn()\n");
    System_flush();
    CONSOLEUtilsInit();
    CONSOLEUtilsSetType(CONSOLE_UTILS_TYPE_UART);
    System_printf("done!");
    System_flush();
    System_printf("exit taskFxn()\n");

    System_flush(); /* force SysMin output to console */
}

The corresponding console output looks like this:

[CortxA8] enter main()
enter taskFxn()
 0x00000000  R8  = 0xffffffff
R1 = 0x00000000  R9  = 0xffffffff
R2 = 0x00000000  R10 = 0xffffffff
R3 = 0x80014e64  R11 = 0x800230fc
R4 = 0x00000018  R12 = 0x8001ef4c
R5 = 0x00000000  SP(R13) = 0x80014fc0
R6 = 0xffffffff  LR(R14) = 0x8002586c
R7 = 0xffffffff  PC(R15) = 0x80014fc0
PSR = 0x800230fc
DFSR = 0x00000005  IFSR = 0x00000000
DFAR = 0x00000000  IFAR = 0x00000000
ti.sysbios.family.arm.exc.Exception: line 205: E_dataAbort: pc = 0x80014fc0, lr = 0x8002586c.
xdc.runtime.Error.raise: terminating execution

I am kinda lost with this error. Can anyone please help.

over 7 years ago

0 Lalindra Jayatilleke over 7 years ago

TI__Mastermind 30365 points

Maximilian,

Could you please try using Board_initUART() instead? There is a non-bare metal example for UART at C:\ti\pdk_am335x_1_0_4\packages\MyExampleProjects\UART_BasicExample_bbbAM335x_armExampleProject

Note that this project would need to be generated using the pdkProjectCreate.bat file processors.wiki.ti.com/.../Rebuilding_The_PDK

CONSOLEUtilsInit could be crashing due to some pinmuxing issue. Did you verify that these are correct for your init?

If I recall, CONSOLEUtilsInit has:
Board_initUART();
UART_stdioInit(0);

Lali

0 Maximilian Partenfelder over 7 years ago in reply to Lalindra Jayatilleke

Prodigy 50 points

Hi Lali,

where and how can I check the Pinmuxing?
I didn't modify it for running the example on the BeagleBone Black. This might just be the problem.

Could it be problematic if I compiled some of the dependent projects for the can_rx_tx example with the TIv16 compiler and the main application with the GNUv4 one or is it possible to mix these after compilation?

Thank you

Max

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AM335x Sys/Bios with DCAN example