SPI, debugging, errors, need help!

spetcavich · ‎2012-03-29

Posted on March 29, 2012 at 10:16

The original post was too long to process during our migration. Please click on the attachment to read the original post.

alok472 · ‎2012-03-29

Posted on March 30, 2012 at 04:00

Just make sure that the circuit is not drawing too much current.. for example LCD backlight ..

or SPI pins accidently/momentatrily shorted to VDD/Gnd. causing the 3.3V to drop...Ths may cause the Debugger to fail.

I guess you may have verified that the board is fine by running another firmware

simonlee0311 · ‎2012-03-29

Posted on March 30, 2012 at 05:23

Failed to read CPUID for Cortex device

> It seems like JTAG works fail. I suggest check the setting of your J-Link.

Can you post more fail information?

Simon