Software AreasOfWork » History » Revision 8
Revision 7 (steve-m, 02/19/2016 10:49 PM) → Revision 8/13 (Anonymous, 02/19/2016 10:49 PM)
= Areas of Work = This page lists the various areas of the project that require some work, and who (if at all) is working on fixing it. == Infrastructure == === Build System === * we need a clean/known base as a compiler * At the moment, we're mostly using the 4.0.2 release from gnuarm.com, which is fairly old * independence of system-provided header files * We should be mostly there now. But testing this and verifying our independence of system headers would be great === Operating System === * Decide which RTOS to use on the Calypso * we don't want to use FreeRTOS * OS should have clear abstraction of core (ARM7TDM), SoC and board level features * OS should cleanly compile to a library that we can link with all our other code * While we only work on the GSM stack, no OS is needed. But as soon as UI comes around, that changes. === Development Tools === * try to make JTAG (C155) work with OpenOCD * steve-m made some experiments, but halting the ARM core only seems to be possible via the undocumented ICEPick unit == Host Software == * osmocon support for the native ROM loader in the Calypso, the [wiki:Hardware/CalypsoRomloader], [wiki:CalypsoRomloader], like it is found on most non-Compal phones * "non-secure" variant (done, steve-m) * "secure variant" on Calypso/Calypso plus (basic reverse engineering done) == Target Software == === Drivers === * charger detection, battery charging (roh) * SIM card reader (dexter) * Color display driver for C155 (done, steve-m) * backlight driver * vibrator driver * buzzer driver for C123 * C155 ringtone chip driver for SPMA100 chip * Fix the I2C driver to use the b/w LCD without any sleep/delay loops * done (sigwinch) === GSM Stuff === * TRF6151, TPU, TSP, AGC, AFC (laforge) * Layer1, particularly the synchronous part (laforge, spaar) * Layer2 (zecke, laforge) * Layer3 (eversberg) * Playing with the Voice part using the dsp misc task (spaar?) === General Infrastructure === * Flash-based log-structured filesystem (prom) === Bootloader === * Put together a bootloader (prom) * Define linkage situations (prom) === UI related === * proportional fonts in at least two sizes, as small as possible * monospaced fonts waste too much scarce screen real estate * cache the frame buffer in RAM and sync when needed * once we have a scheduler and tasks, run screen refresh as low-priority task * hardware independent API to support C123, C155 (and later other) displays * software should not care if it is using color or b/w display * some kind of fixed screen layout masks, where * a data structure defines a screen mask * the application can easily update the content without having to deal with formatting/positioning * UI widgets like * lists that can be scrolled through * menus build of a tree of such lists
