Code

Re-implement PWM generator logic#7231

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earlephilhower merged 68 commits intoesp8266:masteresp8266/Arduino:masterfrom

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Nov 20, 2020

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Commits on Apr 19, 2020

• Re-implement PWM generator logic

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• Merge branch 'master' into realpwm

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• Adjust running PWM when analogWriteFreq changed

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• Also preserve phase of running tone/waveforms

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• Clean up signed/unsigned mismatch, 160MHz operat'n

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Commits on Apr 20, 2020

• Turn off PWM on a Tone or digitalWrite

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Commits on Apr 21, 2020

• Remove hump due to fixed IRQ delta

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Commits on Apr 22, 2020

• Speed PWM generator by reordering data struct

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Commits on Apr 24, 2020

• Remove if() that could never evaluate TRUE

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Commits on Apr 27, 2020

• Add error feedback to waveform generation

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• Move _stopPWM and _removePWMEntry to IRAM

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• Avoid long wait times when PWM freq is low

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Commits on Apr 28, 2020

• Merge branch 'master' into realpwm

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• Fix bug where tone/pwm could happen on same pin

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• Adjust for random 160MHZ operation

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• Clean up leftover debugs in ISR

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• Subtract constant-time overhead for PWM, add 60khz

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• Fix GPIO16 not toggling properly.

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Commits on Apr 29, 2020

• Remove constant offset to PWM period

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• Remove volatiles, replace with explicit membarrier

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• Consolidate data into single structure

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• Factor out common timer shutdown code

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• Remove unneeded extra copy on PWM start

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• Factor out common edge work in waveform loop

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• Factor out waveform phase feedback loop math

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• Reduce PWM size by using 32b count, indexes

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• GP16O is a 1-bit register, just write to it

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• Merge branch 'master' into realpwm

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Commits on May 3, 2020

• Increase PWM linearity in low/high regions

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• Remove redundant GetCycleCount (non-IRQ)

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• Factor out common timer setup operations

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• Fix clean-waveform transition, lock to tone faster

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Commits on May 4, 2020

• Reduce code size ~145 bytes

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• Reduce IRAM by pushing more work to _setPWM

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Commits on May 5, 2020

• Fix typo in PWM pin 1->0 transition

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• Combine cleanup and pin remove, save 50 bytes IROM

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• Remove unused analogMap, toneMap

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• Save IRAM/heap by adjusting WVF update struct

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• Don't duplicate PWM period calculation

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• Factor out common PWM update code

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• Merge branch 'master' into realpwm

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• Clean up old comments

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• Fix indent, remove some unneeded if-else branches

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• Fix regression when analogWrite done cold

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Commits on May 6, 2020

• Save 16b of IRAM by not re-setting edge intr bit

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Commits on May 7, 2020

• Allow on-the-fly PWM frequency changes

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Commits on May 8, 2020

• Adjust for fixed overhead on PWM period

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• Fix value reversal when analogWrite out of range

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Commits on May 9, 2020

• Merge branch 'master' into realpwm

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Commits on May 10, 2020

• Don't optimize the satopWaveform call

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Commits on May 13, 2020

• Avoid side effects in addPWMtoList

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Commits on May 18, 2020

• Adjust PWM period as fcn of # of PWM pins

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Commits on Jun 4, 2020

• Merge branch 'master' into realpwm

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Commits on Jun 6, 2020

• Fix occasional Tone artifacts

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• Reduce CPU usage and enhance low range PWM output

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Commits on Jun 7, 2020

• Merge branch 'master' into realpwm

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• Update min IRQ time to remove humps in PWM linearity

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• Remove minor bump at high PWM frequencies

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Commits on Jun 8, 2020

• Undo the 160->80 frequency adjust

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Commits on Jul 13, 2020

• Merge branch 'master' into realpwm

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Commits on Aug 23, 2020

• Merge branch 'master' into realpwm

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Commits on Aug 29, 2020

• Merge branch 'master' into realpwm

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• Update core_esp8266_wiring_pwm.cpp

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• Update core_esp8266_wiring_pwm.cpp

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Commits on Oct 26, 2020

• Merge branch 'master' into realpwm

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Commits on Nov 20, 2020

• Merge branch 'master' of https://github.com/esp8266/Arduino into realpwm

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• Fix Servo shutdown changes which caused trouble with Servo::detach()

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• Servo shutdown tweak in PWM path

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