FreeCalypso > hg > fc-tourmaline
view doc/Luna-notes @ 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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FreeCalypso Luna phone handset UI development platform consists of these 3 components: * A Caramel-type Calypso motherboard, either iWOW DSK or FC Caramel2 * An LCD carrier board, currently using HaoRan HT020K1QC36S LCD module * A 5x5 keyswitch matrix board for the keypad function This Luna is our primary official platform for FreeCalypso phone handset UI development. The UI code we got from TI comes in two interesting versions: * Big color version: 176x220 pixels, 16-bit color * Small B&W version: originally 84x48 pixels, we are extending it to 96x64 pix (Originally there was also a third version, large 176x220 pix B&W, but we find it uninteresting and we've removed it from our supported set. It was really nothing more than a hack to display a minimal-effort derivative of the original small B&W UI on the large D-Sample LCD, so we are not removing anything of any real substance here.) FC Luna hardware is required for anyone who wishes to work on the phone handset UI project in FC Tourmaline: it is the only target platform that can display both versions of our work-in-progress UI firmware. Mot C1xx and other similar phones have small LCDs that can only display the small B&W version of our TI-based UI, and in the Mother's opinion working solely on the smallbw version to the exclusion of the bigcolor version is not acceptable.