topic Re: User Guide to measure target current and debug external target? in LPC Microcontrollers

User Guide to measure target current and debug external target?

lpcware — Wed, 15 Jun 2016 17:04:06 GMT

Content originally posted in LPCWare by 1234567890 on Sat Nov 22 07:27:16 MST 2014
I'm not that quick that:

1.) On http://www.embeddedartists.com/products/lpcxpresso/lpc1549_xpr.php 'Current consumption can be measured of all target side circuitry'. On page 1 of the schematics P3 are open pins in parallel to a zero ohm resistor. To measure the current I have to cut this resistor and connect my amp-meter between the P3 pins?

2.) On http://www.lpcware.com/LPCXpressoV2Boards, section 'Debugging via the built-in debug probe', 'Debugging an external board using the built-in debug probe' the jumper settings are described. But how to connect (what) wires? Removing the 10-pin header and connect the (at least in my toolbox) unusual 1.27 mm pins with SWD, clock and so on to the external target?

Is there a tutorial for that?

Re: User Guide to measure target current and debug external target?

lpcware — Wed, 15 Jun 2016 17:04:07 GMT

Content originally posted in LPCWare by 1234567890 on Tue Nov 25 13:14:55 MST 2014
At least the second question is pretty interesting for me actually...

At the weekend I will try an LPCXpresso board with a LPC-Link 1 (LPC11C24) where there are lots of guides to seperate the Link from the target (e.g. http://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCkQFjAA&url=http%3A%2F%2Fwww.embeddedartists.com%2Fsites%2Fdefault%2Ffiles%2Fdocs%2FHowToCreateAnLPC-LINK.pdf&ei=FuJ0VMO7EIrcatzVgpgJ&usg=AFQjCNFo6XH7o-S_N_BGHF2TayQjcd1TQg). I have already done this with one board. Removing solder bumps is quite easy and a really smart solution. This leads back to the first question.

Re: User Guide to measure target current and debug external target?

lpcware — Wed, 15 Jun 2016 17:04:07 GMT

Content originally posted in LPCWare by lpcxpresso-support on Wed Nov 26 00:53:23 MST 2014

Quote: 1234567890

2.) On http://www.lpcware.com/LPCXpressoV2Boards, section 'Debugging via the built-in debug probe', 'Debugging an external board using the built-in debug probe' the jumper settings are described. But how to connect (what) wires? Removing the 10-pin header and connect the (at least in my toolbox) unusual 1.27 mm pins with SWD, clock and so on to the external target?

The LPCXpresso1549 has a standard "Cortex 10-pin 0.05" JTAG/SWD Connector" fitted. The same connector is used for both debugging the onboard MCU using an external probe or for using the onboard debug probe to debug an off-board MCU (after configuring jumpers appropriately). Typically, you would have the same connector on the target board you wish to debug, then use a 10-pin cable to connect the two. For more details see:

http://www.lpcware.com/content/faq/lpcxpresso/debug-design

You can see this being done in the "Rapid Embedded Development with LPCXpresso" video at http://www.lpcware.com/lpcxpresso (starting around 52.45 into the presentation).

Regards,
LPCXpresso Support