ADC Button Peripheral
Read status of buttons connected to an ADC input using a resistor ladder. Configuration provides for more than a singe ADC input to read several sets of buttons. For an example hardware implementation please refer to schematic of ESP32-LyraTD-MSC V2.2 Upper Board (PDF).
Application Examples
Implementation of this API is demonstrated in the following example:
API Reference
Header File
Functions
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esp_periph_handle_t periph_adc_button_init(periph_adc_button_cfg_t *btn_cfg)
Create the button peripheral handle for esp_peripherals.
备注
The handle created by this function is automatically destroyed when esp_periph_destroy is called.
- 参数
btn_cfg – The button configuration.
- 返回
The esp peripheral handle.
Structures
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struct periph_adc_button_cfg_t
The configuration of ADC Button.
Macros
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ADC_BUTTON_STACK_SIZE
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ADC_BUTTON_TASK_PRIORITY
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ADC_BUTTON_TASK_CORE_ID
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PERIPH_ADC_BUTTON_DEFAULT_CONFIG()
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ADC_DEFAULT_ARR()
ESP32 ADC1 channels and GPIO table ADC1_CHANNEL_0 - GPIO36 ADC1_CHANNEL_1 - GPIO37 ADC1_CHANNEL_2 - GPIO38 ADC1_CHANNEL_3 - GPIO39 ADC1_CHANNEL_4 - GPIO32 ADC1_CHANNEL_5 - GPIO33 ADC1_CHANNEL_6 - GPIO34 ADC1_CHANNEL_7 - GPIO35