CC2652R: Problem with firmware upload.

Mateusz Foks

Part Number: CC2652R
Other Parts Discussed in Thread: UNIFLASH

Hello,

We've designed our pcb based on CC2652R MCU.
Now we want to program it (as programmer we are using that one placed on CC26x2 LAUNCHPAD XL) and have some strange issue.

What exactly happens:

- For the first time upload of the firmware was success - program boots and run as expected.

- For the second time upload failed and IDE showed this error:

- Then if i upload firmware again, upload succeed but program doesn't boot.

Then i tried to use UniFlash tool. So i tried to upload firmware again and got this error:

But if i do whole flash memory clear before programming, then firmware uploads and runs as expected.

I've no idea what can cause this issue. We've tried three pcbs and one works well always, and on the other two we've this problem.

Additional info.

We've tried also another CC26x2 LAUNCHPAD as programmer, but nothing changed.

We tried to upload some examples from SDK to exclude that our firmware causes this issue, but the same occurs.

Version of CCS i'm using: 10.4.0.00006

Version of UniFlash: 6.4.0.3394

SDK Version: SimpleLink_CC13x2_26x2_4.30.00.54

Best regards,

over 5 years ago

0 YiKai Chen over 5 years ago

Guru 735705 points

Can you take a picture to show me your JTag connection between debugger and your custom PCB?

0 Jan over 5 years ago

TI__Mastermind 44920 points

Hi,

As YiKai mentioned, can you show us the JTAG connection? Can you also share a pdf of the schematic so that we can see if there is anything on the actual design that may be having an effect on the flashing process?

Best Regards,

Jan

0 Mateusz Foks over 5 years ago in reply to YiKai Chen

Prodigy 130 points

Hello,

unfortunately i can't show you picture of our PCB and any schematics.

Below, on the picture you can see the CC26x2 LaunchPad, which we use as a programmer.
On our custom board the apropriate MCU pins are connected to the pads placed on PCB.

So the wires that you can see on the picture are simply soldered to those pads.

We've checked for any shorts etc. but it looks ok.

Custom PCB is powered form external power source, but grounds of the eval board and zigbee board are connected.

Best regards,

0 YiKai Chen over 5 years ago in reply to Mateusz Foks

Guru 735705 points

The cable between XDS debugger and SOC is suggested not to longer than 10CM. If looks you are using longer cable, I would suggest you to use shorter cable to try again.

0 Mateusz Foks over 5 years ago in reply to YiKai Chen

Prodigy 130 points

Hi, thanks for relpy.

We tried with shorter cables (they are shorter than 10cm for sure) and nothing changes.

I also checked the reset pin with osciloscope during programming and i can't see there any change of state. There is 3.3V permanetly. Is it good behaviour?

+1 Jan over 5 years ago in reply to Mateusz Foks

TI__Mastermind 44920 points

Hi,

The reset functionality is necessary for programming the device. During programming, the device is expected to reset. I took out the reset jumper out of a LaunchPad and got the same error message shown below:

Can you share the section of the schematic that shows the reset portion of the device? If this is not possible, then you may want to consider requesting a SIMPLELINK-2-4GHZ-DESIGN-REVIEWS of your design. If this is also not possible, then I highly recommend comparing your design (especially the reset and programming related circuitry) with the reference design for the CC26X2R1 LaunchPad: LAUNCHXL-CC26x2R1 Design Files (Rev. A).

Best Regards,

Jan

0 Mateusz Foks over 5 years ago in reply to Jan

Prodigy 130 points

Hi sorry for the late answer.

We relsoved that issue. The reset signal was soldered to the wrong pad on the pcb. I don't know how we could miss that.
Thanks for your help.

regards,

0 Jan over 5 years ago in reply to Mateusz Foks

TI__Mastermind 44920 points

Hi,

No worries! We are glad to hear you were able to resolve the issue.

Best Regards,

Jan

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CC2652R: Problem with firmware upload.