TM4C , Boot-Loader

Hello Jame,

Unfortunately you have provided very little information about your problem and I cannot make any determination of what might be causing it. Have you tried tracing through your code to see why the DownLoad Command was not sent? Have you put a scope on the UART lines to see if any activity/communications back and forth are happening or get some idea of what is happening on the com line? Is the device completely erased prior to executing this code? If the device is not erased and there isn't a boot loader already programmed into flash or logic to instantiate the ROM boot loader, the device will not necessarily enter the boot loader and won't recognize the PC communications.

From a brief review of the sflash code it would seem that the failure point is the first point at which there is attempted communication with the device so I would suspect some issues with the communications causing your error. This would be a great place to start looking for the root cause of your issue.

Hello Chuck

I want update via a UART0 serial Port

I saw the sample code and documentation

   -  (Sampe Code) examples\boards\dk-tm4c123g\boot_serial

   -  (Doc) SW-DK-TM4C123G-UG, SW-TM4C-BOOTLDR-UG

Using the board(DK-TM4C123G)  is no problem 

Serial Flash Downloader Procedural Order ?

thanks

 

 

Jame,

In order to minimize effort and confusion and to consolidate the discussion, I will close this thread since you have opened another with the same topic at this link: e2e.ti.com/.../1919680