TM4C1294NCPDT has serious problems in EMAC initialization

Sergio Kamakura

Other Parts Discussed in Thread: EK-TM4C1294XL

I am developing an UDP server using TM4C1294XL board.

After several tests, using the "SDOCM00107378: NDK examples for EK-TM4C1294XL do not work" code, I found that with or without this code, the EMAC freezes in some compilation. In other words, if I add some code in my program, after compilation and debugging it, sometimes it freezes the ethernet communication. Even if the code added is not related with communication.

So, I am wondering if this problem is not related as a BYTE ALIGNMENT in object code. As example, when the EMAC freezes, I add or delete the additional line in code below:

UInt32 ui32FlashConf;

ui32FlashConf = HWREG(0x400FDFC8); // add or delete if EMAC freezing occurs
ui32FlashConf = HWREG(0x400FDFC8);
ui32FlashConf &= ~(0x00020000);
ui32FlashConf |= 0x00010000;
HWREG(0x400FDFC8) = ui32FlashConf;

Doing this, my program run perfectly.

Could someone enlight this issue, please?

Thank you.

over 10 years ago

0 ToddMullanix over 10 years ago

TI__Guru* 96960 points

Sergio,

Where are you adding this code? Note: the fix was placed into the EMACSnow driver. The pre-fetch is disabled (if not already disabled) in the EMACSnow_NIMUInit function and then enabled (if not previously disabled) in the EMACSnow_emacStart. You should not have to add any management of the pre-fetch in 2.00.02.36 (and later). The issue did appear to be a byte alignment issue with the EMAC and pre-fetch.

Todd

0 Sergio Kamakura over 10 years ago in reply to ToddMullanix

Expert 2495 points

Todd

I am using the udpEcho example and this piece of code was already there in main(). Remember that I was using old version of TI-RTOS ( 2. 0.1 23) and the examples are old too.

So, what I done was uninstalled CCSv6 and reinstalled it again ( with anti-virus disabled ). In Windows 8.1 64 bits.

Now I can reach TI-RTOS 2.10.1.38 and new examples, very different from previous.

But, I don't know why, this actual installation refuses to compile due following error:

error #10269: output file "udpEcho_TivaTM4C1294NCPDT.out" exceeds code size limit
error #10010: errors encountered during linking; "udpEcho_TivaTM4C1294NCPDT.out" not built

More strange also, is that I did the same in other computer with Windows 7 64 bits, just to be sure that the issue could be solved with reinstallation, and the same code ( udpEcho ) compiles to end without problem. I tested this code into Tm4C1294XL launchpad connected in this W7 computer.

Anyway, I posted another thread in CCS forum regarding this error, so, if you prefer, I can wait for support in that forum.

Thank you very much.

Sergio

0 ToddMullanix over 10 years ago in reply to Sergio Kamakura

TI__Guru* 96960 points

Hi Sergio,

Do you have an evaulation copy of CCS?\

Todd

0 Sergio Kamakura over 10 years ago in reply to ToddMullanix

Expert 2495 points

Todd

I have a FREE LICENSE.

Accordingly with TI marketing, the CCSv6 is free to be used with TM4C1294XL launchpad. I understand that this means without limit of code size.

As I told you in previous e-mail, in Windows 7 64 bits, I can compile without problem all the examples. The problem appeared in Windows 8 64 bits. In this same W8 computer, the previous installation was compiling without problem.

If there is limit of code size, what is this limit?

Thanks

Sergio

0 Sergio Kamakura over 10 years ago in reply to Sergio Kamakura

Expert 2495 points

Todd

I uninstalled CCSv6.0.1 and installed CCSv6.1 and the compilation problem disappeared. Very probable this issue is due W8.1, not CCS.

As I can use TI-RTOS 2.10.1.38, the new example of udpEcho does not have that piece of code to disable flash prefetch, so, hope, I can proceed with my development.

You can consider my issue solved.

Thank you very much.

Sergio

Processors

Processors forum

TM4C1294NCPDT has serious problems in EMAC initialization