1.5 schematic: Hard to see PMOD1 and UART are connected via J5

wuxx / icesugar

iCESugar FPGA Board (base on iCE40UP5k)

350 stars 96 forks source link

1.5 schematic: Hard to see PMOD1 and UART are connected via J5 #13

Open rvalles opened 3 years ago

rvalles commented 3 years ago

After some head-scratching, I realized the reason pin 4 seemed to be shorted high was that it's connected to STM32's UART TX via J5.

In the schematic, PMOD1 does clearly show how some of the pins are connected to the microusb port. However, it fails to show that some pins are also connected to J5.

It would be best if PMOD1's link with J5 was shown in the same manner as done with the USB pins.

wuxx commented 3 years ago

OK, Thanks for the good advice, later will update the schematic

WizardTim commented 2 years ago

I agree, took me a few minutes to realize what was going on.

If there ends up being a V1.6 PCB it might be a good idea to highlight pins on the silkscreen that have multiple uses (USB, UART & J7/PMOD1 shared IO). Just using the invert option in Altium Designer should do the trick. Would suggest to users just starting out with it they should investigate PMOD1's IO further before using it.

Once I figured that out I loved using this dev board! The drag and drop programming is very convenient.