Mechanical switches exhibit temporary voltage fluctuations
when electrical contact is made, which manifest as "bouncing"
between the logical high and low states. Sampling the switch's
state during this period of stability produces invalid results.
The switch must be debounced by ignoring the generated interrupts
until the switch's state has stabilized. This is implemented by delaying
the input events until an empirically determined time has elapsed.
As such this pull request introduces customizable high resolution timers
for debouncing button down and up events.
This software debouncing unfortunately increases the sensor watch's
input latency. This is an acceptable tradeoff due to better usability:
watch faces which require holding down buttons such as the pulsometer
should work much more reliably after this patch.
Reviewed-by: Matheus Afonso Martins Moreira <matheus@matheusmoreira.com>
Tested-on-hardware-by: Krzysztof Gałka <@kshysztof@Discord>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/437
References: https://en.wikipedia.org/wiki/Switch#Contact_bounce
Adds the ability to configure at compilation time
the movement's default birth date and location.
Tested-by: madhogs <madhogs@protonmail.com>
Tested-by: Niehztog <niehztog@gmail.com>
Tested-on-hardware-by: madhogs <madhogs@protonmail.com>
Tested-on-hardware-by: Niehztog <niehztog@gmail.com>
Reviewed-by: Matheus Afonso Martins Moreira <matheus@matheusmoreira.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/387
Currently, movement drops timeout events in case the previous loop
indicates that sleep is not possible. This is due to unintended
short circuiting behavior of && and is fixed with a temporary variable.
The static qualifier of can_sleep is also removed.
Helped-by: Alex Maestas <git@se30.xyz>
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/376
Adds overridable C preprocessor definitions for every user preference.
Enables the user to set defaults and omit the preferences face.
The default behavior of the watch is preserved.
Suggested-by: Wesley Aptekar-Cassels <me@wesleyac.com>
Implemented-by: madhogs <x3dh4vhf@duck.com>
Reviewed-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/295
GitHub-Related-Issue: https://github.com/joeycastillo/Sensor-Watch/issues/291
Currently, movement drops time out events in case the previous loop
indicates that sleep is not possible due to short circuiting behavior
of logical and in C: if the left-hand side is false, the right hand
side is not evaluated at all, which means the loop is not called.
This was not intended to happen.
Fix it by storing the result in a second boolean variable
and working out the logic after the fact.
I like to use the ten minute timeout on my watch and there are other
people who have similar interests in a lower deadline. The two day
deadline had to go to still accommodate the change within the three
bit index.
The default setting is still the one hour timeout.
This makes movement_play_signal synchronous when in LE mode, despite
using the underlying asynchronous API. It's a bit of a hack, but it
should work well enough for now.
This also moves the enabling/disabling of the buzzer into the
movement_play_signal function, so that watch faces no longer have to do
it.
* Introduce shell module for basic serial shell with argument parsing
* Introduce shell_cmd_list module for basic compile-time command
registration
* Harden USB handling to hang less and drop fewer inputs
- Service tud_task() with periodic TC0 timer interrupt
- Service cdc_task() with periodic TC1 timer interrupt
- Handle shell servicing in main app loop
- Add a circular buffering layer for reads/writes
* Change newline prints to also send carriage return
* Refactor filesystem commands for shell subsystem
* Introduce new shell commands:
- 'help' command
- 'flash' command to reset into bootloader
- 'stress' command to stress CDC writes
Testing:
* Shell validated on Sensor Watch Blue w/ Linux host
* Shell validated in emscripten emulator
* Tuned by spamming inputs during `stress` cmd until stack didn't crash
