r3-rc1

add a white LED for VBUS_DEV

r2

Fixes some major oversight in R1: USB-C must be plug to device not receptacle because no valid male->male USB-C cable will pass both CC1 and CC2 - see USB-C Spec B.2.3.1. Additionally, the cross-over the TX/RX which is not compatible with DAM wiring.

Updated README to reflect this change, noting that a straight-through USB-C extension cable can be used to device.

Apart from this, R1 bring-up was successful:

• plug it in power on
• device power
• device USB passthrough
• FT230 -> USB
• FT230 UART working
  • physical loopback Rx/Tx test
  • ACT LEDs working
  • device power control with 3V3 link
• VCCIO link works and powers logic for FT230X without device.
• DAM
  • continuity test pins
  • CC pins enable DAM not in R1 since male->male cable will not forward both CC1 and CC2. Also AND gate did not work but op-amps do - 90% sure this is soldering of tidy AND gate - edit was footprint error for AND (VCC P5 -> P6) on example board.
  • DAM_EN isolates DAM
  • full SWD works (with TX/RX switched for R1) RTT works and reset
  • RX/TX switch works tested with physical loopback and SWD still working but not RTT/reset

r1

current status in readme; build action