- 10 May, 2020 5 commits
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Raptor Engineering Development Team authored
Switch main sequencer to use word transfer for firmware reads.
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Raptor Engineering Development Team authored
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Raptor Engineering Development Team authored
Use quad SPI I/O for all firmware read cycles. This significantly improves overall IPL speed.
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Raptor Engineering Development Team authored
Shave a master clock cycle off the SPI transfer by initiating frame start on transition from idle state
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Raptor Engineering Development Team authored
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- 04 May, 2020 1 commit
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Raptor Engineering Development Team authored
This is no longer needed on the reworked prototype hardware
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- 17 Apr, 2020 1 commit
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Raptor Engineering Development Team authored
This helps work around data corruption in hand-wired prototype situations where crosstalk is a significant concern.
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- 16 Apr, 2020 2 commits
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Raptor Engineering Development Team authored
Signal new HIOMAP window creation with both read and write window types
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Raptor Engineering Development Team authored
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- 07 Apr, 2020 3 commits
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Raptor Engineering Development Team authored
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Raptor Engineering Development Team authored
Increase drive strength to 16mA on LPC LAD/FRAME/RESET lines by ganging two adjacent SB_IOs together with an external short This fully resolves the data corruption previously seen due to weak drive causing positive going signals to lose their first several dozen ns in the worst case, thus violating LPC setup and hold time (hold time violation was due to negative going signals not being affected by the static bus loading, thus having the effect of shortening any positive going pulses instead of shifting them later in time as would have been expected with capacitive loading). Note this does not resolve the remaining word-oriented corruption seen, but does appear to fully resolve the random bit and byte oriented corruption that was causing major diagnostic issues over the past week.
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Raptor Engineering Development Team authored
Stop SPI transmissions from being randomly skipped due to SPI core handshake related race conditions in the master transmission state machine Run everything off the LPC clock for simplicity Add LPC clock PLL to system POR handler as a secondary reset source
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- 28 Mar, 2020 1 commit
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Raptor Engineering Development Team authored
Relabel SPI SS to reflect active low definition Add SPI HOLD# signal for Micron Flash device
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- 26 Mar, 2020 1 commit
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Raptor Engineering Development Team authored
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