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annotate doc/Luna-notes @ 281:a75eefbf8be4

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Phone boot with PWON: weed out short button presses Every standard end user phone has a design provision, most naturally implemented in firmware, whereby the PWON button effects a boot only if it is held down long enough - short presses of this PWON button are detected, assumed to be spurious and cause the fw to power back off instead of proceeding with boot. The present change introduces this standard function in FreeCalypso.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 24 Sep 2021 02:03:08 +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.