Arduino函数无缘无故地改变参数

Question

我为 Aduino 写了一个 class，用于阅读 ads124x，但我有一个主要问题，我无法调用 class 定义的函数。这是它的结构：

.ino 调用函数使用 .运算符
.h 包含寄存器映射和 class 定义
.cpp 包含 class

到目前为止，.ino 成功调用了 .cpp 中的一个函数，但是当同一个函数调用 .cpp 中的另一个函数时，它调用失败。

.ino:

#include "ADS124X.h"
void setup(){
    ADS124X ADS124X(1,2,3,4);
    Serial.begin(9600);
    ADS124X.setUP(0x20, 0x20);}

.h:

class ADS124X{
    public:
        void reset(void);
        void setUP(unsigned char* mux1, unsigned char* sys0);
    private:
        void SPI_Write(unsigned char* data, unsigned char size);
}

.cpp:

void ADS124X::setUP(unsigned char * mux1, unsigned char * sys0)
{

    Serial.println("hi");    //prints this
    delay(1);
    reset();                 // stops here
    Serial.println("hi");    // doesn't print this
    delay(1);
    stopDataCont();
    delay(210);
    setREG(MUX1, mux1, 1);
    setREG(SYS0, 0x01, 1);
    delay(1);
}
void ADS124X::reset(void)
{
    unsigned char dataToSend[] = { RESET };
    START_HIGH;
    CS_LOW;
    Serial.println(RESET);       // prints this as 0x06 (correct value)
    SPI_Write(dataToSend, 1);    // Seems to stop here
    START_LOW;
    CS_HIGH;
}
void ADS124X::SPI_Write(unsigned char * data, unsigned char size)
{
    Serial.println("SPI_Write");    //prints this
    for (unsigned int i = 0; i < size; i++) {
        Serial.println("SPI_Write");    //prints this
        Serial.println(* data);    //prints this as 126 (if RESET is 3 * data becomes 189...)
        SPI.transfer(*data);
        Serial.println("SPI_Write");
        data++;
    }
}

Answer 1

这不对...

   Serial.println(RESET);       // println expects a null terminated string  
                                // you are sending a char.

您应该将 dataToSend 定义为以 null 结尾的字符数组。

void ADS124X::reset(void)
{
  char dataToSend[] = { RESET, 0 };
  // ...
  serial.println(dataToSend);  // maybe println "reset" would be better?
  SPI_Write(dataToSend, 1); 
  //...
}

不要指望在您的串行监视器上看到漂亮的 0x06，因为那不是可打印的字符。

Arduino函数无缘无故地改变参数

Arduino function changes argument for no reason

c++

types

class

arduino

spi