CCS/TM4C1294NCPDT: Problem enabling DHCP together with BOOTP

Simion Bernardo

Part Number: TM4C1294NCPDT

Tool/software: Code Composer Studio

I have a slightly complex problem ...

My project is capable of switching between static IP and dynamic IP perfectly.

lwIPNetworkConfigChange(0, 0, 0, IPADDR_USE_DHCP);

lwIPNetworkConfigChange(DEF_Ip, DEF_Mask, DEF_Gateway,IPADDR_USE_STATIC);

Then I implemented in my code a routine for firmware update through the ethernet port.

while(1)
{

//...


    if(g_bFirmwareUpdate == 0x72)
    {
        ROM_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_1, GPIO_PIN_1);
        SoftwareUpdateBegin(g_ui32SysClock);
    }

}

However, after that, I noticed that every time I try to change from static to dynamic IP, my code goes into FaultISR.

Debugging the code, I noticed that it fails to access the function "mem_malloc()", located in "mem.c" just before line 77.

The big question would be: Why did it work well before enabling ethernet firmware upgrade? And what changed to make the code crash after that?

Remember that if I have static IP, the firmware update works correctly ...

I am not getting a solution to this problem, but I believe it may have something related to port 68 used by DHCP and BOOTP.

Looking at the example "boot_emac_flash" it is possible to change the ports used during the upgrade in the file "bl_emac.c"

//*****************************************************************************
//
// The UDP ports used by the BOOTP protocol.
//
//*****************************************************************************
#define BOOTP_SERVER_PORT       67
#define BOOTP_CLIENT_PORT       68

//*****************************************************************************
//
// The UDP port for the TFTP server.
//
//*****************************************************************************
#define TFTP_PORT               69

I'm really not sure if this is really the problem... But is there any way to change these ports without using the "boot_emac_flash" initializer in my project?

Or if my suspicions are wrong, can anyone see what other cause this problem could have?

Thanks!

over 6 years ago

0 Bob Crosby over 6 years ago

TI__Guru 72500 points

From the screen capture above I can see that the code had an imprecise data bus error. See section 3.3 of this document on how to debug this fault further:

http://www.ti.com/lit/an/spma043/spma043.pdf

0 Simion Bernardo over 6 years ago in reply to Bob Crosby

Intellectual 335 points

I performed the procedure and got the results shown in the image.

Is there any procedure I can do besides this?

0 Bob Crosby over 6 years ago in reply to Simion Bernardo

TI__Guru 72500 points

It would be helpful if you mentioned which file and which function is shown in figure 4a. From the comments it looks like a memory allocation issue. Did you try increasing HEAP and STACK sizes?

0 Chester Gillon over 6 years ago in reply to Bob Crosby

Guru 92251 points

Bob Crosby said:
It would be helpful if you mentioned which file and which function is shown in figure 4a.

I think it is the mem_malloc function from TivaWare_C_Series-2.1.4.178/third_party/lwip-1.4.1/src/core/mem.c in that a search of a TivaWare installation found a function which matched the code from the screen shot.

Not sure if the issue is in the lwip, or the program overwriting the heap.

0 Simion Bernardo over 6 years ago in reply to Chester Gillon

Intellectual 335 points

Exactly, as I said in the first post, it's the mem_malloc() function.

I was able to come up with a solution by simply changing the value of MEM_SIZE from (64 * 1024) to (128 * 1024). Thanks for the comments, were very helpful in solving the problem!!

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CCS/TM4C1294NCPDT: Problem enabling DHCP together with BOOTP