47 lines
1 KiB
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47 lines
1 KiB
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###
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DAC
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###
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About
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-----
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DAC (digital to analog converter) is a very common peripheral used to convert a digital signal to an
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analog form.
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ESP32 and ESP32-S2 have two 8-bit DAC channels. The DAC driver allows these channels to be set to arbitrary voltages.
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DACs can be used for generating a specific (and dynamic) reference voltage for external sensors,
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controlling transistors, etc.
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========= ========= =========
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ESP32 SoC DAC_1 pin DAC_2 pin
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========= ========= =========
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ESP32 GPIO 25 GPIO 26
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ESP32-S2 GPIO 17 GPIO 18
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========= ========= =========
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Arduino-ESP32 DAC API
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---------------------
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dacWrite
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********
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This function is used to set the DAC value for a given pin/DAC channel.
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.. code-block:: arduino
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void dacWrite(uint8_t pin, uint8_t value);
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* ``pin`` GPIO pin.
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* ``value`` to be set. Range is 0 - 255 (equals 0 V - 3.3 V).
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dacDisable
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**********
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This function is used to disable DAC output on a given pin/DAC channel.
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.. code-block:: arduino
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void dacDisable(uint8_t pin);
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* ``pin`` GPIO pin.
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