Smoothie on LPCXpresso

[Chris George]

Hey all,

I've decided my programming skills are not up to porting Smoothie to the Due, so I've got my hands on an LPCXpresso board. I'm going to test everything out similar to the "Smoothie on a Breadboard" here, and then make myself a board in the spirit of RAMPS (I've started it here). I wanted to know if there are any particular things I should look out for putting Smoothie onto the LPCXpresso board, or if I can just drop it in as-is (with a proper config file, of course). And, if anyone has feedback on my board layout and design, I'd appreciate it.

Thanks,

Chris

[Jim Morris]

It worked for me. I did find that big fat grounds are essential when using the high current bed heater mosfets, and isolating the mosfets grounds as much as possible is essential too.

You need to remove the LPCLink from the xpresso part too to work on smoothie.

[DAniel Dumitru]

What a pitty that I didn't know that are still some people interested in LPCXpresso board for smoothie.
I have made one and I will publish it

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[Chris George]

Cool. Someone over at the Reprap forums had some extensive comments on my track layout, so I'll be sure to include that in my next pass. Can the LPCLink not be used at all with Smoothie, or is it just easier to lay out without it?

Thanks,

Chris

[Chris George]

Oh, and Daniel, it's not too late to publish it. I may end up liking yours better, who knows.

Chris

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[Jakob Flierl]

Hi *, eagle pcb layouts of a six axes version with step/dir out and
endstop-in are at

https://github.com/koppi/rm501-smoothie-v1

Jakob

[bobc]

The LPC-Link is basically a JTAG/SWD debugger. I'm not sure, but with the LPC-link part attached it takes over control of the target part, meaning you have to program via the LPC-link.

If you carefully separate the LPC-link (I use an Xacto craft saw with a fine cut), then you have an LPC-link debugger and a target part. If you put a 10 pin header on your target board, you can then connect it to the LPC-link (or indeed any other JTAG/SWD debugger - I use Segger JLINK). Or you can connect via the 8way 0.1" header from LPC-link to your target board.

I guess that no-one has set up a Smoothieware with a JTAG debugger, but I think in principle there is no reason why it would not work, unless SMoothie uses the JTAG pins for something else?

[Jim Morris]

I've used a jtag debuuger with smoothie, I used the bus blaster and openocd, works fine, but you don;t really need one as Smoothie has gdb capability built in and you can debug over the serial port. The LPCLink has limitations with the free version of the codered software, so I don;t use it.