No adapter for handler Does your handler implement a supported interface like Controller

  看到关于spring一本书上例子时,出现了错误: No adapter for handler Does your handler implement a supported interface like Controller 多次查看书中原码发现是一致的,后确认有可能是书中原码有误,故把旧的原码粘出,并针对错误进行了修改。 算是spring入门来的第一个问题吧,希望能开个好头。 (1)原配置文件 helloWorldAction show ......... (2)修改后的配置文件 action show .........
### ESP32 Encoder Python Programming Tutorial For interacting with an encoder connected to an ESP32 using MicroPython, one can utilize libraries that simplify the process of reading and interpreting signals from rotary encoders. The following example demonstrates how to set up a basic interaction between an ESP32 board and a rotary encoder through MicroPython code. #### Setting Up Environment To begin working with ESP32 in Python, ensure installation of MicroPython firmware on the device. Tools like `esptool.py` facilitate this setup by allowing flashing of custom firmware versions onto supported hardware platforms[^2]. Once configured correctly, connecting via serial interface enables uploading scripts directly into memory without permanent alteration unless explicitly saved as such during deployment phase. #### Example Code for Reading Rotary Encoder Values Below is sample code demonstrating initialization and continuous monitoring of encoder position changes: ```python from machine import Pin import time class Encoder: def __init__(self, pin_a, pin_b): self.pinA = Pin(pin_a, Pin.IN, Pin.PULL_UP) self.pinB = Pin(pin_b, Pin.IN, Pin.PULL_UP) self.position = 0 last_state = self.pinA.value() def update_position(): nonlocal last_state current_state = self.pinA.value() if current_state != last_state: if self.pinB.value() != current_state: self.position += 1 else: self.position -= 1 last_state = current_state self.pinA.irq(trigger=Pin.IRQ_RISING | Pin.IRQ_FALLING, handler=lambda t: update_position()) encoder = Encoder(18, 19) # Assuming GPIO pins 18 & 19 are used for A & B channels respectively. while True: print(f'Position: {encoder.position}') time.sleep_ms(100) ``` This script initializes two GPIO pins corresponding to channel A and B connections typically found on most mechanical incremental encoders. Interrupt service routines (ISR) attached to these lines detect state transitions which indicate rotation direction based upon relative timing differences observed across both tracks when turning shaft moves past internal contacts within component body structure[^3]. #### Additional Considerations When implementing real-world applications involving motor control systems or user interfaces requiring precise adjustments, consider debouncing mechanisms either at software level inside interrupt handlers or externally utilizing RC circuits before digital inputs receive processed signal levels stable enough for reliable counting operations over extended periods under varying environmental conditions affecting contact bounce characteristics unpredictably otherwise. --related questions-- 1. What other types of sensors can be interfaced similarly with ESP32? 2. How does one implement debounce logic effectively in MicroPython for sensor readings? 3. Are there any specific considerations while choosing GPIO pins for different peripherals on ESP32? 4. Can this approach support quadrature encoding schemes efficiently?
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