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RTOS: TM4C129ENCPDT Bootloader + SysCtlReset

Daniel Vamos
Genius 3950 points


Tool/software: TI-RTOS

Hello,

I would like to reset my device in some case using SysCtlReset but the device is using bootlader for ethernet update with reset vector:

/* ================ Hwi configuration ================ */
var halHwi = xdc.useModule('ti.sysbios.hal.Hwi');
var m3Hwi = xdc.useModule('ti.sysbios.family.arm.m3.Hwi');
m3Hwi.resetVectorAddress = 0x00004000;

My problem is the SysCtlReset is not seems to work. I am using XDS100v2 debugger but on other project where the reset vector is not set the function call works nice.

Thank you for your help. 

  • 0
    TI__Guru* 96960 points
    Hi Daniel,

    Can you give more information on what the vector table is like in the bootloader and in the application? Where are you trying to call SysCtlReset...bootloader or application?

    Todd
  • 0 in reply to ToddMullanix
    Genius 3950 points

    Hey,

    Thank you for your reply.

    The first situation when I would like to call SysCtlReset is when my device lost its IP address. In a multi switched network a dhcp server may be removed. I can detect this event when I lost the IP in the hook function.

    void netIPAddressHook(IPN IPAddr, uint IfIdx, uint fAdd){

    IPN IPTmp;

    if (fAdd) {
        xdc_runtime_System_printf("CustomHook : Network Added: ");
    }
    else {
        xdc_runtime_System_printf("CustomHook Network Removed: ");
        System_printf("Resetting Device\n");System_flush();
        HWREG(NVIC_APINT) = NVIC_APINT_VECTKEY | NVIC_APINT_SYSRESETREQ;
    }

    // Print a message
    IPTmp = ntohl(IPAddr);
    xdc_runtime_System_printf("If-%d:%d.%d.%d.%d\n", IfIdx,
            (UINT8)(IPTmp>>24)&0xFF, (UINT8)(IPTmp>>16)&0xFF,
            (UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF);

    System_flush();

}

    As you can see above. 

    regarding the bootloader I am using the standard boot_emac_flash from the example code of dk-tm4c129 device with vector table address of 0x4000.

  • 0 in reply to Daniel Vamos
    Genius 3950 points

    This line: 

    HWREG(NVIC_APINT) = NVIC_APINT_VECTKEY | NVIC_APINT_SYSRESETREQ;

    is taken from the boot_emac_flash example code. As I saw this line resets the device and starts custom firmware. This line was replaced with 

    SysCtlReset();

  • 0 in reply to Daniel Vamos
    Genius 3950 points
    I think it is working now. If I program the flash-based bootloader starting from 0x00 and the app to location 0x4000 it working as expected. I think the problem in my case was the bootloader was missing.

    Thanks,