【Follow me第二季第2期】基础任务

rtyu789

【Follow me第二季第2期】基础任务 [复制链接]

 

# 任务一：驱动12x8点阵LED  ```C++ /* Single Frame Displays single frames using matrix.loadFrame See the full documentation here: https://docs.arduino.cc/tutorials/uno-r4-wifi/led-matrix */ #include "Arduino_LED_Matrix.h" // Include the LED_Matrix library #include "frames.h" // Include a header file containing some custom icons ArduinoLEDMatrix matrix; // Create an instance of the ArduinoLEDMatrix class void setup() { Serial.begin(115200); // Initialize serial communication at a baud rate of 115200 matrix.begin(); // Initialize the LED matrix } void loop() { // Load and display the "chip" frame on the LED matrix matrix.loadFrame(chip); delay(500);// Pause for 500 milliseconds (half a second) // Load and display the "danger" frame on the LED matrix matrix.loadFrame(danger); delay(500); // Load and display the "happy" frame on the LED matrix matrix.loadFrame(happy); delay(500); // Load and display the "big heart" frame provided by the library matrix.loadFrame(LEDMATRIX_HEART_BIG); delay(500); // Turn off the display matrix.clear(); delay(1000); // Print the current value of millis() to the serial monitor Serial.println(millis()); } ``` 官方的例程中定义了chip，danger，happy，LEDMATRIX_HEART_BIG这几个图形，通过延时来切换图形显示  # 任务二：用DAC生成正弦波  ```C++ /* SineWave Generates a pre-generated sawtooth-waveform. See the full documentation here: https://docs.arduino.cc/tutorials/uno-r4-wifi/dac */ #include "analogWave.h" // Include the library for analog waveform generation analogWave wave(DAC); // Create an instance of the analogWave class, using the DAC pin int freq = 10;// in hertz, change accordingly void setup() { Serial.begin(115200);// Initialize serial communication at a baud rate of 115200 wave.sine(freq); // Generate a sine wave with the initial frequency } void loop() { // Read an analog value from pin A5 and map it to a frequency range freq = map(analogRead(A5), 0, 1024, 0, 10000); // Print the updated frequency to the serial monitor Serial.println("Frequency is now " + String(freq) + " hz"); wave.freq(freq);// Set the frequency of the waveform generator to the updated value delay(1000); // Delay for one second before repeating } ``` 通过A0口发出DAC信号，通过A5口接受，在Arduino IDE上显示   # 任务三、四 用OPAMP放大DAC信号 用ADC采集并且打印数据到串口等其他接口可上传到上位机显示曲线 这两项由于没有示波器，所以就学习了一下代码  ```C++ #include <OPAMP.h> void setup () { Serial.begin(9600); delay(2000); // serial monitor delay // activate OPAMP, default channel 0 // Plus: Analog A1 // Minus: Analog A2 // Output: Analog A3 if (!OPAMP.begin(OPAMP_SPEED_HIGHSPEED)) { Serial.println("Failed to start OPAMP!"); } bool const isRunning = OPAMP.isRunning(0); if (isRunning) { Serial.println("OPAMP running on channel 0!"); } else { Serial.println("OPAMP channel 0 is not running!"); } } void loop() { delay(1000); // do nothing } ``` # 参考资料 [Arduino UNO R4 WiFi Digital-to-Analog Converter (DAC)](https://docs.arduino.cc/tutorials/uno-r4-wifi/dac) [UNO R4 WiFi](https://docs.arduino.cc/hardware/uno-r4-wifi/)

Jacktang

DAC生成正弦波和OPAMP放大DAC信号，还好