tree a42600108d30d5568d3848fcf9f70fdf057f6907
parent 05bb91126147592d9b1666da30339071846f464d
author Pirmin Vogel <vogelpi@lowrisc.org> 1626777863 +0200
committer Pirmin Vogel <vogelpi@lowrisc.org> 1627976925 +0200

[fpga, sw] Enable SCA on ChipWhisperer CW310 FPGA board

This involves the following main changes:
- Two new outputs are defined on the CW310 chip-level to provide the
  target clock and capture trigger to the capture board.
- The capture trigger can now be selected at run time through software
  and GPIO. This allows for taking SCA measurements for different IP
  cores (KMAC, OTBN) without having to re-generate a different
  bitstream.
- The capture trigger is synchronized to the target clock (100 MHz).
  This is needed to prevent metastability issues in the scope depending
  on place and route on the target FPGA.
- UART1 is enabled and muxed to pins IOC9/IOC8 using the pinmux. This
  is needed for the simple serial communication between target and
  capture board, while UART0 remains available for debug prints and
  logging.
- The simple serial library is adjusted to use dif_uart_* only instead
  of a mix of dif_uart_* and base_printf() (this required the UART used
  for simple serial and stdout to be the same device previously).

Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>