Short: I have a few questions regarding pin-outs...
If BOOT0 text is facing up is the female db9 port on the right or left ( I believe left but I need to verify )? Same orientation for all other questions...
For the 5 pin debugging / flashing pins at the bottom left, the silkscreen doesn't have which pin is 3.3v, 5.0v, ground, swdio and swclk; do you mind elaborating which pin is which I can update silkscreen and submit a pull request for the other changes too?
For the BOOT0 pins, what are the differences when using a jumper to connect left-bottom and left-top vs right side?
For the 27/25 pins the same ( I believe it is vertically so center bottom for 27 pedals / shifter depending on side, and top and center for 25 ) which side is for pedals vs shifter?
For the voltage regulator, there is a . on the silkscreen.. is this the key for a dimple ( if there is one ) or does it indicate positive lead?
I updated short version to remove things a photo revealed...
Long version:
I have a few questions if you don't mind... I have all of the parts except the 10uF caps ( which I accidentally removed from my cart and added 2 sets of 4.7uF caps when I was comparing prices ), double-row headers ( which I may end up not using for this ), the micro usb port, the 5v to 3.3 voltage regulator and the DB9 Male port...
I started soldering the first by hand ( Normally I'd set up a line and do all of x, then y, then z to all ) so I can test my pedals and shifter asap and to see how well my solder connections look ( I ordered a tweezer set as mine are too large to be effective and will order a pcb vice because the dual claw thing I have is useless ) to determine whether or not I will build a reflow oven or do them by hand... Hardware is interesting and since I have software down to an art and also teach it, I was thinking of learning hardware... especially since prototyping and ordering boards ( using breadboards or doing mockups with wires causes other issues and everything is more stable on a board ) has become very inexpensive nowadays...
1 ) Assuming from photos on your site, which don't quite have a clear angle for certain parts... and if you're looking at the board with the BOOT0 text up then the FEMALE DB9 port goes on the right ( silk screen doesn't show it ).. Some of your photos show the smallest section of the port but it is still hard to determine whether or not it is female but I believe it is but would like confirmation...
2 ) I ordered different colors of headers and have removed pins from 1 strip of each of six colors ( white, black, blue, green, yellow and red ) and depinned one angled set... I want to set up the debugging angled port with color coding as there is no silk-screen as to which pins are for: SWCLK, SWDIO, GND, 3.3V, 5.0V ( if included ), ( or these which may not be included: SWIM, RST ) - I'm guessing SWCLK, SWDIO, GND, 3.3v and 5.0v are all included ( 5 pins; 4 of which are used by STLink2 to program the board but I only saw 3 used on your photos.. I'm guessing 3.3v, ground and swdio... ) In short I'm wondering which pins correspond to which - I will look up the STM32F042F6N6 pin-out and see about tracing the traces to the pins and updating ( and submitting a push request on git ) the silkscreen with them..
The reason is to add color-coding to the header pins to make it easier until next version with updated silk-screen ( although I may opt to continue using coloring ). Likely colors will be 3.3v as red or white ( as white is still an electrical hot wire and easily identifiable for those that are color-blind ), ground as black, 5.0v as red, yellow or white ( depending on choice for 3.3v - likely to be red ), input / output as green, and sw click as blue...
3 ) I'm interested in knowing the BOOT0 pin in terms of the different modes or differences between jumping the left side vs right side.. so I can set up colored headers to show the right position and to update the silk-screen.
4 ) I'd like confirmation as to my suspicions regarding the jumper positions for the 27 / 25 marker... in terms of which is for shifter vs pedals...
5 ) Confirmation that the . for the voltage regulator is the "key" for positive or negative to verify that I purchased the right layout for the regulator ( although I haven't checked if they changed but since I bought it on eBay I'd like to be safe )..
6 ) The PWR LED negative silkscreen marker is barely noticeable when printed on the board - but it is easy to trace the wires and determine the left pad ( using the same board orientation above ) is the ground...
Thanks!