C2000 Piccolo Launchpad LEDs acting weird

Orestis Polychronakis

Other Parts Discussed in Thread: CONTROLSUITE

Hello all,

Recently I acquired the C2000 Piccolo Launchpad and run successfuly the LED-Temperature sensor default application. Some days before I tried some other examples too and they worked with the emulator mode but then I tried to program the flash but unfortunately I couldn't. Now when I try to load the default application again through the debug perspective in CCS, when I run through some code the LED start to fade in and out (functionality which is not described in the code)

If I step through the execution from the addesses it seems that at the LED blink delay function at some point the uC starts executing BOOT ROM code (address above 0x3FF000) Is it possible?

How can I program the Flash again with the factory default?

Also I havent found a complete Linker command tutorial with all the memory and sections explained so that I can have all programing possibilities at one place.

Thanks in advance

over 10 years ago

0 Gautam Iyer over 10 years ago

Guru 192875 points

Hi,

Orestis Polychronakis said:
How can I program the Flash again with the factory default?

Try this code: C:\ti\controlSUITE\device_support\f2802x\v129\DSP2802x_examples_ccsv4\flash_f28027

Replace the ePWM code with LED blinking one.

Orestis Polychronakis said:
Also I havent found a complete Linker command tutorial with all the memory and sections explained so that I can have all programing possibilities at one place.

Check this link out;

http://processors.wiki.ti.com/index.php/C28x_Compiler_-_Understanding_Linking

Regards,

Gautam

0 Orestis Polychronakis over 10 years ago in reply to Gautam Iyer

Prodigy 30 points

Hello!

Thanks! I did that and it worked!

In the begining except for the nonBIOS linker command file I included the generic flash, but I had to resize the FLASHA and FLASHB memory blocks in order for it to fit. But then I excluded the generic flash and I included the F28027 linker command file and it worked without any changes.

The problem now is that the DSP does not reset properly. When I press reset it again gets deep into abyss and the LED are dimming or having upredictable behaviour. It has to do with the reset. What should I do? Where is the boot process explained and how does it relate to the linker?

Thanks!

0 Orestis Polychronakis over 10 years ago in reply to Orestis Polychronakis

Prodigy 30 points

Actually in the debugger when i run normally and press reset (the C2000 piccolo launchpad reset key) I get 0x3FF5F5 no symbols are defined for 0x3FF5F5. This is in BOOT ROM memory space as I see at the C28027 data manual memory space, but my code is not properly reset.

0 Gautam Iyer over 10 years ago in reply to Orestis Polychronakis

Guru 192875 points

Orestis Polychronakis said:
Where is the boot process explained and how does it relate to the linker?

You can refer : 4370.Boot Rom.pdf

Also, go thorugh: http://processors.wiki.ti.com/index.php/C28x_Compiler_-_Understanding_Linking

Regards,

Gautam

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C2000 Piccolo Launchpad LEDs acting weird