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adamgreig / agg-kicad

KiCAD libraries, footprints, and scripts
MIT License
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STM32F0xxGxUx and QFN-28-ST #122

Closed HarkonenBade closed 7 years ago

HarkonenBade commented 7 years ago

Adds a library part for the STM32F0xxGxUx and an associated footprint for the QFN-28-ST. Footprint was initially generated using build-mod-ic, but was then hand edited to account for the chamfered corner pads required by the data sheet. These are currently implemented as a set of identically numbered pads as shown in the third image below. Kicad seems to accept this and the footprint seems to operate correctly. It does not violate DRC with a 0.2mm clearance as standard. It does identify the extra pads as unconnected sadly. I'm looking to see if anything can be done about this, but I suspect not until Kicad supports polygon pads.

Datasheet

screen shot 2017-08-22 at 22 47 37 screen shot 2017-08-22 at 22 40 41 screen shot 2017-08-22 at 22 40 52 screen shot 2017-08-22 at 22 36 10 screen shot 2017-08-22 at 22 41 19

HarkonenBade commented 7 years ago

Have worked out a new arraignment of overlapping pads which does not produce the same unconnected warnings, will update the PR later today with a new footprint.

HarkonenBade commented 7 years ago

Done

adamgreig commented 7 years ago

Thanks!