TMS320F28062F: usb_dev_serial Example on 28062

Terry Liu70

Part Number: TMS320F28062F

Hi TI Experts,

A question on usb_dev_serial example from C2000_Ware (V4.02). The example targets 28069 device, and I had some trouble when tring to target my 28062F device.

I imported the example to CCS12.1 workspace, specify device to 28069U, project can be built successfully.

Then I did the following,

1, Modify F2806x_Device.h

#define DSP28_28062P 0

#define DSP28_28062UP 0

#define DSP28_28062PZ 0

#define DSP28_28062UPZ TARGET //I did not find 28062F here

2, Modify Project Property

3,Re-build project, got below errors.

"../28062_RAM_lnk.cmd", line 118: error: program will not fit into available

memory, or the section contains a call site that requires a trampoline that

can't be generated for this section. placement with alignment/blocking fails

for section ".text" size 0x5206 page 0. Available memory ranges:

RAML0_L3 size: 0x2000 unused: 0x2000 max hole: 0x2000

undefined first referenced

symbol in file

--------- ----------------

_ebss_size ./F2806x_CodeStartBranch_ebss_init.obj

_ebss_start ./F2806x_CodeStartBranch_ebss_init.obj

it seems that the error comes with an asm source, but i have no idear how to modify it...

Thanks for anybody who may help on this!

over 3 years ago

0 Siddharth Deshpande over 3 years ago

TI__Mastermind 36305 points

Hi,

The error is because the program is unable to fit in the given memory range.

You can either try to enable compiler optimization to reduce the code size and see if it compiles fine.

Best Regards

Siddharth

0 Terry Liu70 over 3 years ago in reply to Siddharth Deshpande

Intellectual 500 points

Hi Siddharth,

Thanks for the reply, yet the problem still there.

I tryied to set compiler optimization at different levels, but did not help.

I also tried to set target device to 26068, which has the same memory structure as 28069; but it still reports the same error.

T.L.

0 Siddharth Deshpande over 3 years ago in reply to Terry Liu70

TI__Mastermind 36305 points

T.L.

Since 26068 and 26069 have the same memory structure, you can reuse the same linker command file and compile.

Looks like this example needs more memory and hence the RAML0_L5 section is created to combine RAML0-5

Best Regards

Siddharth

0 Terry Liu70 over 3 years ago in reply to Siddharth Deshpande

Intellectual 500 points

Hi Siddharth,

I use 28068 yesterday was just trying to see if the example works on devices other than 28069.

My actrual target device is 28062, and I need to make it work for USB CDC. Is there is any known-good example for 28062?

Thanks,

T.L.

0 Siddharth Deshpande over 3 years ago in reply to Terry Liu70

TI__Mastermind 36305 points

T.L.

This is the only example that is available.

I also tried multiple compiler options to make the code fit in the memory but was not successful. Looks like this example/USB lib needs more memory and won't fit on RAM.

Other option is to run from Flash. You can use the linker command file "F28062.cmd" file . Here also you may have to combine the Flash sections so that the .text section gets allocated.

Best Regarsd

Siddharth

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TMS320F28062F: usb_dev_serial Example on 28062