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Hao Ning
2021-03-23 14:18:01 +08:00
parent 859f7e3664
commit fc0eba4101
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docs/en/api-reference/peripherals/adc.rst
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@@ -47,8 +47,8 @@ ADC Limitations
.. only:: esp32
- Some of the ADC2 pins are used as strapping pins (GPIO 0, 2, 15) thus cannot be used freely. Such is the case in the following official Development Kits:
- :ref:`ESP32 DevKitC <esp-modules-and-boards-esp32-devkitc>`: GPIO 0 cannot be used due to external auto program circuits.
- :ref:`ESP-WROVER-KIT <esp-modules-and-boards-esp-wrover-kit>`: GPIO 0, 2, 4 and 15 cannot be used due to external connections for different purposes.
- ESP32 DevKitC: GPIO 0 cannot be used due to external auto program circuits.
- ESP-WROVER-KIT: GPIO 0, 2, 4 and 15 cannot be used due to external connections for different purposes.
- Since the ADC2 module is also used by the Wi-Fi, only one of them could get the preemption when using together, which means the :cpp:func:`adc2_get_raw` may get blocked until Wi-Fi stops, and vice versa.
.. only:: not esp32