FreeCalypso > hg > fc-tourmaline
view doc/Luna-notes @ 51:04aaa5622fa7
disable deep sleep when Iota LEDB is on
TI's Iota chip docs say that CLK13M must be running in order for
LEDB to work, and practical experience on Mot C139 which uses
Iota LEDB for its keypad backlight concurs: if Calypso enters
deep sleep while the keypad backlight is turned on, the light
flickers visibly as the chipset goes into and out of deep sleep.
TI's original L1 sleep manager code had logic to disable deep sleep
when LT_Status() returns nonzero, but that function only works
for B-Sample and C-Sample LT, always returns 0 on BOARD 41 - no
check of Iota LEDB status anywhere. Change this code for our
current hardware: disable deep sleep when Iota LEDB has been
turned on through LLS.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Mon, 19 Oct 2020 05:11:29 +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.