Question

这是此处帖子的后续行动 - Writting data to the Arduino's onboard EEPROM 我刚刚尝试使用URL中的代码片段但不起作用。请帮我修复以下错误。

write_to_eeprom.cpp:8:5: error: expected unqualified-id before '[' token
write_to_eeprom.cpp: In function 'void setup()':
write_to_eeprom.cpp:12:16: error: 'stringToWrite' was not declared in this scope
write_to_eeprom.cpp: In function 'void loop()':
write_to_eeprom.cpp:22:33: error: invalid conversion from 'uint8_t {aka unsigned char}' to 'char*' [-fpermissive]
write_to_eeprom.cpp: In function 'void EEPROM_write(void*, byte)':
write_to_eeprom.cpp:32:32: error: 'void*' is not a pointer-to-object type

这是代码

#include <EEPROM.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd(8, 13, 9, 4, 5, 6, 7);
char[] stringToWrite = "Test";
void setup() {
  lcd.begin(16, 2);
  delay(5000);
  EEPROM_write(stringToWrite, strlen(stringToWrite));
}

void loop() {
  delay(10000);
  int addr = 0;
  byte datasize = EEPROM.read(addr++);
  char stringToRead[0x20];          // allocate enough space for the string here!
  char * readLoc = stringToRead;
  for (int i=0;i<datasize; i++) {
    readLoc = EEPROM.read(addr++);
    readLoc++;
  }
}
// Function takes a void pointer to data, and how much to write (no other way to know)
// Could also take a starting address, and return the size of the reach chunk, to be more generic
void EEPROM_write(void * data, byte datasize) {
  int addr = 0;
  EEPROM.write(addr++, datasize);
  for (int i=0; i<datasize; i++) {
    EEPROM.write(addr++, data[i]);
  }
}

Answer 1

嗯，你需要修改你的代码：

第8行 - []需要在stringToWrite之后去第12行 - 修复第8行后应该会好转

第22行 - 您需要取消引用readLoc。在它之前添加一个'*'。

第32行 - 您的参数“data”是指向void的指针，它没有大小。因此，您将无法将其用作数组。您可以将声明更改为：

void EEPROM_write（ char * data，byte datasize）

修复了编译器错误。快速查看代码的语义似乎正在做你想要的。祝你好运。

将数据写入Arduino EEPROM

1 个答案: