https://github.com/charkster/samd21-gpio_high_and_low_durations

This arduino code for SAMD21 will record a gpio's high and low duration for multiple pulses.
https://github.com/charkster/samd21-gpio_high_and_low_durations

arduino gpio high-duration low-duration samd21 seeeduino-xiao trinket-m0

Last synced: about 2 months ago
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This arduino code for SAMD21 will record a gpio's high and low duration for multiple pulses.

• Host: GitHub
• URL: https://github.com/charkster/samd21-gpio_high_and_low_durations
• Owner: charkster
• License: mit
• Created: 2020-10-17T08:21:03.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2022-10-22T23:26:13.000Z (over 2 years ago)
• Last Synced: 2025-01-13T19:27:02.157Z (4 months ago)
• Topics: arduino, gpio, high-duration, low-duration, samd21, seeeduino-xiao, trinket-m0
• Language: C++
• Homepage:
• Size: 122 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# samd21-gpio_high_and_low_durations

![picture](https://github.com/charkster/samd21-gpio_high_and_low_durations/blob/main/samd21_timer_pwp.png)

This arduino code for SAMD21 will record a gpio's high and low duration for multiple pulses. Each high and low duration will be captured up to 4 seconds in duration. One microsecond pulses can be reliably captured (faster than that is not possilbe with the samd21, use the samd51 which has a faster clock).

The uf2 file works for both Seeeduino Xiao and Adafruit QT PY. SAMD21 pin PA7 is used to measure the pulse widths. On Xiao this pin is A8/D8/SCK and on QT PY it is A7/D7/RX.