CCS/TMS320F28377D: TMS320F28377D

Vanu,

FLASH is a non volatile memory, RAM is non-volatile.

Why do you say the controller loses the memory/code? you may be having some issue with boot modes, please search that in the datasheet,

if you are using a hardware ordered from the TI website please indicate that, so we can be specific on the settings to be done.

regards
Manish Bhardwaj

I am using single phase grid connected inverter reference design. So, when I unplug USB from the controller the code is still on the controller hence I am able to see my output signal. However, once I turn off my power supply connected to the logic of the controller and turn it back on I am not able to see my output since my controller lost the code.

Vanu,

Adding to what Manish said:

1) Make sure to use Flash based linker command file.  For example, check the 2837xD_FLASH_lnk_cpu1.cmd file from TI.  It allocates .text, .cinit, .econst etc. sections to Flash so that the corresponding content is programmed to Flash when you load the code to the device.

2) For sections that have Flash load address and RAM execution address, make sure to use memcpy() to copy those contents from Flash to RAM (for example:  .TI.ramfunc section) before executing any code from those sections.

3) Once you load the code in to Flash, configure the boot mode pins for boot to Flash mode so that your application starts executing from Flash upon a power cycle.

Thanks and regards,
Vamsi

When I change 2837xD_FLASH_lnk_cpu1.cmd file from TI then I get lot of errors in my C code but when it is RAM then there are no errors. Does it mean I need to change the pins in my code?
Also, is there any other option to run the code and not lose it after turning off the supply without changing anything in the code?

Vanu,

What errors did you get?

You need to load the code to Flash to be able to not lose it after a power cycle.

Thanks and regards,
Vamsi

Yes mam that's exactly what I did and the problem is we have a relay connection for the output. So, when we turn off the power supply for logics of controller and cut it back on the relay does not turn back on, hence we do not have any output signal.

Vanu,

What errors did you get when you use 2837xD_FLASH_lnk_cpu1.cmd for your project?

Thanks and regards,
Vamsi

Vanu,

Any update on your debug?

Thanks and regards,
Vamsi

Vanu,

I am closing this thread since I did not hear back from you.

Thanks and regards,
Vamsi