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parallaxinc / PropLoader

Parallax Propeller loader supporting both serial and wifi downloads
MIT License
27 stars 13 forks source link

RAM and EEPROM checksum verification timeouts #36

Closed PropGit closed 7 years ago

PropGit commented 7 years ago

What are the timeout periods for waiting for RAM Checksum response and EEPROM Checksum response?

Are those timeouts different (internally in PropLoader) for wired vs. wireless, or are they somehow related?

These questions arise because the timeout for EEPROM Checksum response is much too long, greater than 20 seconds. This is testable on wired serial by downloading and pressing/releasing the reset button right after "Programming EEPROM" message appears.

PropGit commented 7 years ago

The timeout seems somehow related to the transmitPacket routine retry cycles, according to the verbose messages. Perhaps this isn't a very practical thing to trim down.

dbetz commented 7 years ago

It depends on which load you mean. For loading the second-stage loader using the Propeller ROM loader the timeout for the checksum is 250ms, the timeout for EEPROM programming is 5s and the timeout for EEPROM verify is 2s.

If you're talking about loading the user program, the timeout for programming the EEPROM is 8s but the code tries three times.