* separate mutexes for improved performance:
- busses.show and effect drawing
- critical changes to segment vector
- block out critical segment changes while strip.service() loops over segments
* UDP realtime acquires mutex before drawing
- prevents corrupted outputs, caused by parallel tasks updating pixels while busses.show() runs
revised mutex and critical section handling for segment drawing
- simplified code with macros (no more #if ESP32 ... #endif)
- remove some critical sections (prevents interrupt stalling)
- added mutex to functions that change the list of segments
- added mutexes to all (potential) background drawing code
- use recursive mutexes to prevent accidental self-locking of tasks
* protect pixel buffer changes with critical section
* protect segment list modification with critical section
* make _isServicing and _triggered atomic (move out of packed bitarray)
* allow custom timeout for waitUntilIdle - DDP needs a longer timeout
* protect strip.show() and effect drawing functions with mutex, to prevent crashes
-> distortion waves 3x speedup
-> hiphotic 2x speedup
-> waving cell 1.5x speedup
* replace sin8_t by lookup-table with pre-computed values
* moved integer sin and cos to fcn_declare.h (inlined by the compiler)
* moved gamma32 to fcn_declare.h (inlined by the compiler)
* a few other small tweaks
* mark synchronization variables volatile (thread-safe)
* additional logic in closeFile() to avoid file write while leds are pushed out by NPB driver
* some comments and analysis
* replace "yield()" after file ops with "delay(0)" before operations.
* make sure that gamma LUT is always initialized
* remove some unnecessary safety checks
* make gamma8() inline, for more speed
* use fast unGamma8 for preview
* add super-fast unGamma8 for HUB75 - old function lost 3-10 fps, this version does not reduce fps at all *grins*
boot-up delay to fix wifi not starting in some setups
use
`-D WLED_BOOTUPDELAY=500` (or some other delay you want, in milliseconds)
in platformio env definition to add 500ms of delay before hardware init.
The NeoPixelBus RMT driver seems to get stalled when ESP.get.... functions are called (big kernel lock?). Also its glitching during flash file access.
This change tries to avoid some conflicts by first checking that the driver is not sending.
* setup: print free filesystem space after mount
* loop: forgot to actually reset the stale lock
* handleConnection: (8266) user messages in case of "heap too low".
see https://github.com/espressif/arduino-esp32/issues/9043
"
The S3, C3, C6 and H2 that have HW CDC JTAG USB port may cause a delay when using HWCDC in Serial by activating CDC on Boot and selecting the USB Mode for Hardware CDC and JTAG. This happens when no USB application in USB Host side is started to receive the data sent by the ESP32xx.
The USB CDC buffer gets full and the Arduino HW CDC layer will timeout, by default 100ms, until give up trying to send the CDC data.
As a workaround, it is necessary to use HWCDC::setTxTimeoutMs(timeout_ms) and set it to zero.
"
