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fix(i2c_master): Fix issue that initialize esp32 and using i2c_master_probe issue,

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and probe might failed.
Fixed I2C cannot return err code when nack detected
Closes https://github.com/espressif/esp-idf/issues/13213,
Closes https://github.com/espressif/esp-idf/issues/12929,
Closes https://github.com/espressif/esp-idf/issues/13398,
This commit is contained in:
Cao Sen Miao
2024-03-15 14:06:52 +08:00
parent 8567102be4
commit 90afc33cd8
6 changed files with 204 additions and 16 deletions
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docs/en/api-reference/peripherals/i2c.rst
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@@ -297,6 +297,10 @@ I2C Master Probe
I2C driver can use :cpp:func:`i2c_master_probe` to detect whether the specific device has been connected on I2C bus. If this function return ``ESP_OK``, that means the device has been detected.
.. important::
Pull-ups must be connected to the SCL and SDA pins when this function is called. If you get `ESP_ERR_TIMEOUT` while `xfer_timeout_ms` was parsed correctly, you should check the pull-up resistors. If you do not have proper resistors nearby, setting `flags.enable_internal_pullup` as true is also acceptable.
.. figure:: ../../../_static/diagrams/i2c/i2c_master_probe.png
:align: center
:alt: I2C master probe