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serialdata/ref/README@7b4735e9c2c1

serialdata/ref/README

Thu, 07 Oct 2021 22:26:33 +0200

author

David Douard <david.douard@sdfa3.org>

date

Thu, 07 Oct 2021 22:26:33 +0200

changeset 70

7b4735e9c2c1

parent 43

c850674a3101

permissions

-rw-r--r--

Make sure to send pending keys

even if the FP is flood by the CPU: hijack the started transmission
(just after receiving a SoT (0x66) datagram).

Sessions of UART capture of the reference HP34970A unit.

In these capture frames:
- RX: FP -> CPU
- TX: CPU -> FP

Example extraction of data:

  sigrok-cli -i startup-no-key -P uart:baudrate=187500:parity=even:rx=RX:tx=TX \
             --channels RX,TX  -A uart=rx-data:tx-data:rx-start

Start-bit: following code is a RX, so generated by the FP.