39 lines
2.3 KiB
Plaintext
39 lines
2.3 KiB
Plaintext
[video member=miotatsu stream_platform=twitch project=riscy title="Confusion over our PWM signals" vod_platform=youtube id=df9aLCHrBPI annotator=Miblo]
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[0:08][Recap and set the stage for the day]
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[0:47][Outline the confusion surrounding the apparently inverted pulse-width modulation of the LED][:peripheral]
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[3:24][Refresh ourselves on Generating PWM Waveforms[ref
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site="SiFive Developers"
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page="Platform Reference Manual"
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url=https://www.sifive.com/documentation/freedom-soc/freedom-e300-platform-reference-manual/]][:research]
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[9:28][The PWM waveform our code generates for the green signal in PWM_CMP1][:blackboard :peripheral :research]
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[18:15][Consult the code for the blue and red channels][:peripheral :research]
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[22:08][Consult LED datasheets for the HiFive1[ref
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site="SiFive Developers"
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page="SiFive HiFive1 Getting Started Guide"
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url=https://static.dev.sifive.com/dev-kits/hifive1/hifive1-getting-started-v1.0.3.pdf][ref
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site="SiFive Developers"
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page="HiFive1 Schematics"
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url=https://www.sifive.com/documentation/boards/hifive1/hifive1-schematics]][:research]
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[27:55][Consult the datasheets for other LED :peripheral[ref
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site=Worldsemi
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page="WS2812B: Intelligent control LED integrated light source"
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url=https://www.parallax.com/sites/default/files/downloads/28085-WS2812B-RGB-LED-Datasheet.pdf][ref
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site="China Young Sun LED Technology Co., Ltd."
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page="YSL-R596CR3G4B5C-C10"
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url=https://www.sparkfun.com/datasheets/Components/YSL-R596CR3G4B5C-C10.pdf]][:peripheral :research]
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[35:46][Read about driving LEDs[ref
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site=STMicroelectronics
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page="Generating multicolor light using RGB LEDs"
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url=http://www.st.com/resource/ja/application_note/cd00157323.pdf]][:peripheral :research]
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[42:26][Read about software brightness modulation[ref
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site=STMicroelectronics
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page="Generating multicolor light using RGB LEDs"
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url=http://www.st.com/resource/ja/application_note/cd00157323.pdf]][:peripheral :research]
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[45:20][Read about Color control - software modulation[ref
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site=STMicroelectronics
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page="Generating multicolor light using RGB LEDs"
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url=http://www.st.com/resource/ja/application_note/cd00157323.pdf]][:peripheral :research]
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[52:02][Determine to ask on the forums what's going on with the LEDs]
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[55:23][Thanks]
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[/video]
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