i.MX ProcessorsのトピックRe: IMX28 with USB Wiggler

IMX28 with USB Wiggler

neeveehariharan — Fri, 02 Oct 2015 05:27:10 GMT

Hi,

We are trying to bringup Freescale IMX28 processor using USB Wiggler.

Configured LCD_D01, LCD_D02, LCD_RS pins are pulled high.

Interfaced the USB Wiggler with IMX28 processor,

We are getting the following error while trying to connect using USB Wiggler.

sudo ocdremote -c iMX28 -d USB -a 0 -s 2

OCDemon InitializeTarget Error : Cable Disconnected

We confirmed that POWER, RESET, CLOCK pins are fine. Also tried with DEBUG pin configured as Pulled High & Low as well.

Please share your inputs in this regards,

Thanks,

Hariharan.V.

Re: IMX28 with USB Wiggler

Yuri — Fri, 02 Oct 2015 06:42:34 GMT

Hello,

You have to configure boot pins for JTAG boot mode (DEBUG is LOW for Bondary Scan,
HIGH for software debug) and provide POR (power on sequence). Please refer to Table 12-3
(Boot Mode Selection Map) of the i.MX28 Reference Manual. After that You may start up JTAG
testing.

Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: IMX28 with USB Wiggler

neeveehariharan — Sun, 04 Oct 2015 13:29:46 GMT

Hi,

We applied the POR ( Power on Reset ) sequence properly.

Please help me to configure DEBUG pin, whether it needs to Pulled LOW or HIGH for using USB Wiggler JTAG.

Thanks,

Hariharan.V.

Re: IMX28 with USB Wiggler

Yuri — Mon, 05 Oct 2015 03:30:22 GMT

Hello,

For software debugging :

LCD_D04 = 0

LCD_D03 = 0
LCD_D02 = 1
LCD_D01 = 1
LCD_D00 = 0

DEBUG = 1

Table 12-3 (Boot Mode Selection Map) of i.MX28 RM.

Regards,

Yuri.