ADC MCP3561无法返回转换值

一种可能的解决方法是使用SPI通信协议与ADC MCP3561进行数据交互。以下是一个示例代码，展示了如何初始化和读取MCP3561的转换值。

#include <SPI.h>

// Define MCP3561 pins
const int CS_PIN = 10;

void setup() {
  // Initialize SPI communication
  SPI.begin();
  SPI.setDataMode(SPI_MODE1);
  SPI.setBitOrder(MSBFIRST);

  // Set CS_PIN as output
  pinMode(CS_PIN, OUTPUT);
  digitalWrite(CS_PIN, HIGH); // Set MCP3561 CS_PIN to HIGH by default
}

void loop() {
  // Select MCP3561 by setting CS_PIN to LOW
  digitalWrite(CS_PIN, LOW);

  // Send command to read conversion value
  SPI.transfer(0x00);  // Send dummy byte to initiate conversion

  // Read 24-bit conversion value
  int32_t conversionValue = 0;
  conversionValue |= SPI.transfer(0x00) << 16;  // Read MSB
  conversionValue |= SPI.transfer(0x00) << 8;   // Read mid byte
  conversionValue |= SPI.transfer(0x00);        // Read LSB

  // Deselect MCP3561 by setting CS_PIN to HIGH
  digitalWrite(CS_PIN, HIGH);

  // Print conversion value
  Serial.print("Conversion Value: ");
  Serial.println(conversionValue);

  delay(1000);  // Delay for 1 second before next conversion
}

请注意，此代码示例假定MCP3561已正确连接到Arduino，并且SPI库已正确安装。您可能还需要根据您的硬件和需求进行适当的配置更改。