I just got my TM4C123G development board last week. I am very new at programming embedded devices and have no experience with this platform.
My problem is that I cannot program the board and I cannot communicate with it using the various debug tools.
At first I was able to program the board using the example programs given by TI. The last program I programmed was the example program boot_demo1 provided by TI. When I try to program the anything using LM Flash Programmer or CCS using the settings given by the User Guide it says, "**ERROR**: Unable to find a target!"
I've tried going to flash utilities and using the debug port unlock. Once I got all the way through it where it says to repower the device, but now its saying "Failed to unlock connected device!". I am holding down the reset button and following the on screen instructions. I've tried doing a hardware reset using the LM flash programmer but the error says, "Cannot find target device!". I've used two computers for this one with Windows 8 and the other with Windows 7.
Lastly the power light is not lit by default. I have to press the button labeled "SELECT/WAKE" for the power light to show up. Why is this? Is this by default or was it part of the boot_demo1 program? Also when I try to do the debug procedures listed above the "In-Circuit debug interface" light flashes once.
I have a project to do with this board and I need to get this fixed soon. Thanks in advance.