FreeCalypso > hg > fc-tourmaline
view doc/Modem-operation @ 268:f2e52cab0a73
abb_inth.c: check all interrupt causes, not just one
The original code used if - else if - else if etc constructs, thus
the first detected interrupt was the only one handled. However,
Iota ITSTATREG is a clear-on-read register, thus if we only handle
the first detected interrupt and skip checking the others, then the
other interrupts will be lost, if more than one interrupt happened
to occur in one ABB interrupt handling cycle - a form of rare race
condition. Change the code to check all interrupts that were read
in this cycle.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sun, 13 Jun 2021 18:17:53 +0000 |
| parents | a62e5bf88434 |
| children |
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FC Tourmaline stdmodem functional configuration is equivalent to Magnetite hybrid. The only intentional diff from Magnetite to Tourmaline in the modem configuration is the change of Nucleus: Magnetite uses the blob version of Nucleus which came with TCS211-20070608, whereas Tourmaline uses the source version of Nucleus by Comrade XVilka. It is essentially a change from an unknown version of Nucleus to a known one, thus it should generally be considered an improvement - but as always with such changes, extensive verification and testing needs to be done in order to ensure that nothing got broken. Aside from the one intentional change of Nucleus version, FC Tourmaline is an entirely new firmware source tree, thus it is always possible that something could have got broken unintentionally, particularly in rarely-tested areas of the firmware. Therefore, extensive testing will need to be done before we can declare Tourmaline stdmodem as officially replacing Magnetite hybrid for stable modem products.