Sylvain Munaut 60f664fba3 gateware: Rework the low-level line state monitoring ticks
The 'tick' system was meant to allow the firmware to monitor the
low level state of the line, beyong just "not aligned", but it was
never really useful in the present state.

Now we have more tick source available (but only one can be measured
at the same time). More specifically, the firmware can monitor the
presence/absence of raw pulses (LOS condition), it can also monitor
the number of '1' pulses to detect an AIS signals, or simply the rate
of RX pulses (to tune the local oscillator to incoming signal rate).

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: I31fa8a717a26643f1b6ca5644bee1d8c41a2512e
2024-04-30 16:08:14 +02:00
no2e1@dac3a8b7a5 gateware: Rework the low-level line state monitoring ticks 2024-04-30 16:08:14 +02:00
no2ice40@e2a0c694e0 gateware/icE1usb: Replace custom I2C core with SB_I2C wrapper 2020-10-03 20:52:43 +02:00
no2misc@59350da954 gateware: no_rw_check fixes to cope with new yosys BRAM inferrence 2022-10-04 21:34:56 +02:00
no2usb@9a3e752eab gateware/cores: Update no2usb 2024-03-07 08:51:08 +01:00