FX3 not debug without USB connection with OLIMEX ARM-USB-OCD-H

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EvEv_2610591
Level 2
Level 2

Hi,I have PCB with FX3. When I try to start debud using OLIMEX ARM-USB-OCD-H debuger not work. In console window I see than no jtag connection. But when I connect FX3 to USB bus (to PC) all is work good.

I need debug FX3 not using USB connection. I need help)))

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1 Solution

Hi Evgen,

I have tried debugging cyfxbulksrcsink firmware example using FX3 DVK Board, in self power mode and J link Segger Debugger.

It is working fine for me. From this we can get to know that USB is not having any role in JTAG debugging.

It seems there are some power issue with your board or with the connections

Regards,

Rashi

Regards,
Rashi

View solution in original post

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12 Replies
Rashi_Vatsa
Moderator
Moderator
Moderator
5 likes given 500 solutions authored 1000 replies posted

Hi Evgen,

I have gone through your problem. I will come up with a solution by tomorrow (Monday).

Regards,

Rashi

Regards,
Rashi
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Ok I`m waiting!

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Rashi_Vatsa
Moderator
Moderator
Moderator
5 likes given 500 solutions authored 1000 replies posted

Hi Evgen,

I wanted to know how are you powering the board. Bus powered or self powered?

'When FX3 is connected to USB, it works good'   From this it seems like it drawing power from the bus.

Regards,

Rashi

Regards,
Rashi
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Hi, my board has own power supply. Scheme of the power supply is the same as SuperSpeed Explorer Kit (+3.3 V and +1.2 V). VBUS is +5V

My board not used USB power!!!

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Hi Evgen,

Can you share the schematics of FX3 portion of your board?

Regards,

Rashi

Regards,
Rashi
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no I can`t ((((

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Scheme is the same as Cypress dev board, with the same connection and STU.

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Hi Evgen,

I have tried debugging cyfxbulksrcsink firmware example using FX3 DVK Board, in self power mode and J link Segger Debugger.

It is working fine for me. From this we can get to know that USB is not having any role in JTAG debugging.

It seems there are some power issue with your board or with the connections

Regards,

Rashi

Regards,
Rashi
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Your board is

EZ-USB® FX3™ Development Kit (CYUSB3KIT-001)?

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Yes

Regards,

Rashi

Regards,
Rashi
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Are you debuged in Self-Power Mode?

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Hi Evgen,

Yes, i debugged cyfxbulksrcsink firmware on FX3 DVK board in self powered mode.

Regards,
Rashi

Regards,
Rashi
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