Sequence Recording - TechTechTechnologies/Prometheus GitHub Wiki

Here's what need to happen to record a sequence:

Configuration page needs to be set. The configuration page contains 12 bytes of tuning information, 1 byte of mode information, and 4 bytes pointing to the start of the sequence.

Then the recorder waits until the taps change: Internal registers containing the last taps configuration for each LFSR bitwise AND with current taps configuration. Compare to 0 for tap change signal lines.

When a taps change occurs:

• latch in relevant counter
• latch in relevant taps
• set current command in memory buffer
• increment memory pointer
• reset counters

if the memory pointer is not at 255, then go back to waiting. otherwise, the page is full:

• switch buffers
• signal write ready
• reset memory pointer to 4
• go back to waiting

if the recording line turns off, then set end command, switch buffers, and signal for write, then go back into idle state

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The first four bytes of each page gives the address of the next page. If those are 0, then the page is empty.