TM4C1294，How can I tell if the bootstrap program（boot_emac_flash.bin） firmware package is working properly？

Hi,

  I'm not clear with your problem description. Let me clarify a few things. The boot_emac_flash.bin is the bootloader. It will reside starting at 0x0. You can use either the CCS or Uniflash to load the code. The loading of the bootloader is done via the JTAG interface. After it starts running, it will bootload your application. The TivaWare contains an application (boot_demo_emac_flash.c) that is to be loaded at at 0x4000. Is the boot_demo_emac_flash.c (the application) that you try to load via the Ethernet interface? Can you clarify what is not working? Is it the boot_emac_flash (the bootloader) or the boot_demo_emac_flash (the application). You can use the LM flash programmer to load your application for Ethernet interface. See below example. You will need to enter your own IP address and MAC address of your device. 

Please follow the below steps to run the example.

1. Run enet_lwip example and record the IP address. The IP address will be displayed via the terminal window. The reason to first run this example is to simply acquire an IP address. The bootloader is meant to be very compact in size using the BOOTP protocol. However, the BOOTP is static in nature, unlike the DHCP which provides dynamic IP address to the client upon request. Normally your DHCP will lease an IP address to your client (the MCU) for a certain time frame, may be hours or a day. Right after you acquire the IP address by running the enet_lwip the IP address will still be valid for a while. This is the IP address you want to enter in the LM flash programmer. If you are using the launchpad then in the back of the board, there is a sticker that shows the MAC address. The LM flash programmer is acting as the BOOTP and TFTP server. It must have the association between the IP address and the MAC address pre-recorded in its system. Please note that you must have the correct IP address and MAC address entered in the LM flash programmer. Without them, the sever cannot accept the BOOTP request from the client. 
2. Program the emac_boot_flash into the flash via the JTAG interface.
3. Open the LM flash programmer and enter the IP address and MAC address from step 1 shown in the terminal widow
4. Run the emac_boot_flash program
5. Go to the LM flash programmer under Program tab, specify the boot_demo_emac_flash.bin and hit Program button

Can you successfully run the example?

Hello，Offline Charles Tsai 

          boot_emac_flash.bin is the bootloader . I use either the  Uniflash to load the code,It reside starting at 0x0.User applications are one of our projects,I loaded it to 0X4000 via uniflash.It's perfectly normal to get here

          but when we do the application upgrade, use the LM flash programmer to load application for Ethernet interface,accidentally, the program burned into the exception, the specific performance is the application does not work (the user LED did not flash.Network card light is not on, directly connected to the computer, the computer most of the time can not identify the network card device, a few seconds can, but the IP address is completely ping), I want to know 2 points, 1, what reason may lead to this problem (wrong network card selection?IP and MAC addresses wrong??

2, how to know the program burned into the abnormal, boot_emac_flash.bin,Has it been broken?

Abnormal this upgrade is not frequently, but different people upgrade may be abnormal operation, our equipment to hang in the air, can't often go to dismantling equipment, so want to know what reason is caused, our program is completely normal, abnormal equipment removed, use uniflash burn-in can return to normal.