【MicroPython】machine.ADC Function

machine.ADC(id):
- ADC object constructor, and initialize the corresponding channel.
- id: can be a GPIO object or an ADC channel;

The ADC object constructor is used to initialize the corresponding ADC channel. The parameter ID is the ADC channel used. You can use the Pin object or directly specify the ADC channel.

When using the Pin object, the specified GPIO needs to support the ADC function, namely GPIO26-29;

Use the specified ADC channel, channel 0-3 corresponds to GPIO26-29, channel number 4 corresponds to the internal temperature sensor.

ADC.read_u16():
- Read the ADC value of the corresponding channel

The read_u16 function reads the corresponding channel ADC and returns the read value;

It should be noted here that the return value of this function does not directly return the value read by the ADC, but the processed value, and its value range is 0-65535;

Therefore, the ADC voltage calculation formula should be:

Vin =\frac{3.3*ReadData}{65535}Vin=655353.3∗ReadData
The ADC read voltage is 3.3 times the return value divided by 65535 in V
This article is only for RP2040 MicroPython firmware, and the source code shall prevail. This article is written according to the official source code at the time of writing, which is used to provide convenience for beginners and is for reference only. Those who are capable are recommended to refer to MicroPython.

TAG： ESP32 S3 Development Board 1.47 inch LCD Touch Screen 1.47inch Display 172&times;320 SD AXS5106L JD9853 Raspberry Pi MLX90640 USB to SPI Luckfox Pico Pro Raspberry Pi ESP32 Development Board WiFi+Bluetooth Ultra Low Power Dual Core ESP 32S ESP 32 Similar ESP8266 ADXL354C Development Board ESP32 C3 Raspberry Pi Compute Module 4 CM4 PCIe to M.2 NVMe SSD 3.5inch RPi LCD (A) Manual Configuration Raspberry Pi 21.5 inch Type C/HDMI Display Screen 1920x1080 Computer PC Phone Xbox/PS4/Switch Raspberry Pi Camera Module 3 Sensor Assembly IMX708 Official Original 11.9MP Camera Modbus-Series-BootLoader-Description User Guide Raspberry Pi Pico 2 W RP2350 Pico2W ARM Cortex-M33 And RISC-V Hazard3 Wi-Fi4 Bluetooth5.2 CYW43439 Raspberry Pi 1.3inch LCD Raspberry Pi Display USB To CAN Core3566102032 Metal Case Computer Secondary Screen

【MicroPython】machine.ADC Function

Raspberry Pi 5 PCM5122 Audio Card 3.5mm Earphone Jack Argon BLSTR DAC with Ground Loop Isolator For