MATLAB: Embedded coder generated code run on TI C2000 F28335 Ram well but not run on Flash

Question

I am using MatlabR2017b , CCS7.4 and two different dsp , one of TI F28335PGF and the other one is F28335ZJA. I try simply blink a led via simulink blocks by using GPIO DO and one constant block. When I use F28335ZJA i can program both ram and flash,they work well but while try on F28335PGF , I can program ram but I can't program flash. In other words led is blinking when ram is used but led is not responding when i try "boot from flash" option. In order to do my project I need program both of the card via embedded coder. If you need more information please inform me, i can send anything about problem.

Note: On F28335ZJA I use GPIO 31 and GPIO 34 — On F28335PGF I use GPIO 61

Could you please help me ?

Best regards,

Ömer

Answer 1

Hi Ömer,

Are you using different controlCards from TI?

Depending on the controlCard that you use, TI has placed crystals of different values.

For instance R1.1 (ZJZ), has a crystal of 20MHz while R1.0 (PGF) has a crystal of 30MHz.

This can be seen in the schematics for the different controlCards that you can find in controlSuite. On my machine here are the paths:

For R1.0: "C:\ti\controlSUITE\development_kits\~controlCARDs\CC2833xHWdevPkg\F28335controlCARD HWDevPkg PGF [R1.0]\F28335 PGF controlCARD Schematic.pdf"

For R1.1: "C:\ti\controlSUITE\development_kits\~controlCARDs\CC2833xHWdevPkg\F28335controlCARD HWDevPkg ZJZ [R1.1]\F28335controlCARD-Schem[R1.1].pdf"

You need to reflect the correct crystal value for your boards in the configuration parameters of your model under "Hardware implementation > Hardware board settings >Target hardware resources > Clocking > Oscillator clock (OSCCLK) frequency in MHz" and make sure that the "Achievable SYSCLKOUT in MHz" matches your desired CPU frequency (ideally 150MHz).

A wrong crystal value entered in the configuration parameters leads to the type of behaviors that you are describing.

Let us know if this helps,

Thanks,

Antonin.