IRC log of #cubox of Sun 31 Jan 2016. All times are in CET < Back to index

01:23 quitte Hi. Is there a 1:1 document of the SOM? I need the jtag pads positions for pogo pins.
02:22 jnettlet quitte, you couldn't find what you were looking for on documents on the website?
02:27 quitte jnettlet: I only found a picture of that board region in the user and reference manual. but since I have to drill to .1 mm that is not good enough. I'd prefer to just print a 1:1 picture and put it in the drill press. But I could also use a x-y table if I had the dimensions
02:28 jnettlet quitte, the cad drawing for the microsoms aren't good enough?
02:29 quitte jnettlet: that sounds great - but I did not see them. Or maybe I did and they don't have the jtag test pads?
02:31 quitte jnettlet: do you mean the mechanical description with the board to board connector positions?
02:32 jnettlet quitte, why do you need to drill down?
02:33 jnettlet the jtag interface is exposed as test pins on the microsom
02:33 quitte jnettlet: yes. and i need something to put the pogo pins in
02:34 jnettlet why not just solder on the header you need?
02:36 quitte i did that. it's not reliable enough. the pads are just too tiny to solder something on in a way where I can still move the board
02:38 jnettlet is there a specific problem you are looking into, or is this just for testing?
02:39 quitte i bought the board specifically as some multi-core arm that i can attach with jtag to
02:41 jnettlet okay. I would look at the step file for the 3d model and see if that gives you the dimensions you need. Other than that we always just solder to som points to use jtag, but since we have done the bringup there has been no need.
02:43 quitte jnettlet: could you tell me the x-y coordinates in relation to the center of the two heatsink holes per chance?
02:44 jnettlet quitte, I don't have the information, and since you are modding your som I will leave that up to you. In general I mostly work with software.
02:45 quitte okay. I'll figure out how to open the step file. I'm not modifying the som, however. Just the heatsink.