DK-TM4C129X: Is there an example for Ethernet ROM-based boot loader?

Hi Charles,

Also in this post, Amit seems to imply that ROM ethernet is possible I just don't know how to go about it

e2e.ti.com/.../567064

Thanks.
AJ

Hi Charles,

Thanks. Just another question, but before I could use LM flash, what's the function call I should use and are there steps to do first before the function call. I did the ROM based UART before and before I could use LM Flash, I had to include some steps in the code like the one below. What are the lines of code to include in the application to call ROM ethernet before I could use the LM flash and what is the exact function call is it ROM_UpdateEthernet()? I could not find this anywhere.


//
// Disable all processor interrupts. Instead of disabling them one at a
// time, a direct write to NVIC is done to disable all peripheral
// interrupts.
//
HWREG(NVIC_DIS0) = 0xffffffff;
HWREG(NVIC_DIS1) = 0xffffffff;
HWREG(NVIC_DIS2) = 0xffffffff;
HWREG(NVIC_DIS3) = 0xffffffff;
HWREG(NVIC_DIS4) = 0xffffffff;

//
// Call the ROM UART boot loader.
//
ROM_UpdateUART();


Regards,
AJ

Ok, I see what you are trying to do. You want to call ROM_UpdateEMAC from your application code. Yes, do as you what you did for UART to disable all interrupts.

Hi Charles,

One more thing, it looks like the steps you mentioned apply to a Non-RTOS based project. Are there any additional stuff to do since I am using TI RTOS/SYS BIOS? And I am not using LWIP but NDK instead. However, If I do a Bios_exit, won't that stop NDK from running? I'm a bit confused here but here is what I have in mind and please let me know if there is something I am missing.. Or if anyone has done this, having some documentation of the actual steps would be of great help.

I got the idea I have below from this post

e2e.ti.com/.../723031


System_atexit( SomeFunction ); //See SomeFunction below
BIOS_exit(0); //

SomeFunction
{

I'll do all the LWIP and network initialization here.. question is, should I disable NDK before doing the LWIP initialization and other stuff to set up the system for LM flash?
If so, how do I do this?
Or do I even need to disable NDK?
Or does the Bios_exit happen first before this SomeFunction is executed therefore that takes care of disabling NDK?
Or do I even need LWIP since NDK is the RTOS network stack?
If I don't use LWIP. won't The BIOS_exit disable NDK, so how will LM flash communicate?


and then after dealing with all the network stuff above I'll call the lines below

HWREG(NVIC_DIS0) = 0xffffffff;
HWREG(NVIC_DIS1) = 0xffffffff;
HWREG(NVIC_DIS2) = 0xffffffff;
HWREG(NVIC_DIS3) = 0xffffffff;
HWREG(NVIC_DIS4) = 0xffffffff;

//
// Call the ROM UART boot loader.
//
ROM_UpdateEMAC();
}

Any thoughts about the steps above?

Thanks
AJ

I'm not too sure why are you doing the LwIP initiation stuffs? As you pointed out from the other post, you want to exit BIOS and disable all NDK stuffs. You don't want the prior Ethernet settings to stay active when you call ROM_UpdateEMAC. We don't have example to call the ROM Ethernet bootloader when running a TI-RTOS NDK. It will be great if you can get it to work and share with the community.

The thing is, once I exit BIOS and disable NDK, how will the LM flash communicate with the device if there is no enabled network stack? By your previous message, I am assuming that ROM_UpdateEMAC takes care of all the network stuff and is that the case then?