IMX28 with USB Wiggler

[neeveehariharan]

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.

[Yuri]

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

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[neeveehariharan]

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.

[Yuri]

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.