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esp32: Add support for hardware I2C. #4914

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Merged
merged 1 commit into from
Jul 19, 2019
Merged

esp32: Add support for hardware I2C. #4914

merged 1 commit into from
Jul 19, 2019

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dpgeorge
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This PR adds support for hardware I2C on the esp32. Sample usage:

i2c = machine.I2C(0, freq=1000000) # uses default pins
i2c_1 = machine.I2C(1, scl=machine.Pin(4), sda=machine.Pin(5))
i2c.scan()

Only basic testing of this code has been done so far, but it seems to work.

@dpgeorge dpgeorge mentioned this pull request Jul 10, 2019
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@dpgeorge dpgeorge merged commit a293347 into micropython:master Jul 19, 2019
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I did further testing of this PR and fixed a bug with the I2C driver initialisation, added some docs to the quickref, and merged it.

@dpgeorge dpgeorge deleted the esp32-hw-i2c branch July 19, 2019 06:51
@dpgeorge dpgeorge mentioned this pull request Jul 19, 2019
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@GianniDPC
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Aren't the default i2c pins for the ESP32 SCL = GPIO22 and SDA = GPIO21?

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dpgeorge commented Aug 7, 2019

I don't think there are any official default pins, it really depends which board is being used.

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@dpgeorge @GianniDPC