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annotate doc/Luna-notes @ 214:adfdbcd360fd

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backlight evolution: API between Condat driver and MFW With this change, the API between the Condat backlight driver and its user in MFW now carries more abstract backlight state codes (fully off, fully on, in call, charging boot mode) instead of 0-255 levels. This change is needed in order to more properly support different hardware targets with different capabilities and approaches in terms of backlight handling.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 23 Apr 2021 23:52:02 +0000
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1 FreeCalypso Luna phone handset UI development platform consists of these 3
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2 components:
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3
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4 * A Caramel-type Calypso motherboard, either iWOW DSK or FC Caramel2
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5 * An LCD carrier board, currently using HaoRan HT020K1QC36S LCD module
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6 * A 5x5 keyswitch matrix board for the keypad function
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7
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8 This Luna is our primary official platform for FreeCalypso phone handset UI
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9 development. The UI code we got from TI comes in two interesting versions:
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11 * Big color version: 176x220 pixels, 16-bit color
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12 * Small B&W version: originally 84x48 pixels, we are extending it to 96x64 pix
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13
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14 (Originally there was also a third version, large 176x220 pix B&W, but we find
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15 it uninteresting and we've removed it from our supported set. It was really
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16 nothing more than a hack to display a minimal-effort derivative of the original
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17 small B&W UI on the large D-Sample LCD, so we are not removing anything of any
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18 real substance here.)
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19
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20 FC Luna hardware is required for anyone who wishes to work on the phone handset
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21 UI project in FC Tourmaline: it is the only target platform that can display
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22 both versions of our work-in-progress UI firmware. Mot C1xx and other similar
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23 phones have small LCDs that can only display the small B&W version of our
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24 TI-based UI, and in the Mother's opinion working solely on the smallbw version
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25 to the exclusion of the bigcolor version is not acceptable.