写入数据到Arduino EEPROM

Question

这是这里的帖子的后续-将数据写入Arduino's板载EEPROM我只是尝试在URL中使用片段，但不起作用。请帮我修复下面的错误。

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

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

你需要修改你的代码:

第8行—[]需要放在stringToWrite之后第12行——修复第8行

后应该会更好

第22行——您需要取消对readLoc的引用。在它前面加一个'*'

第32行——参数"data"是一个指向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)

修复编译器错误。快速查看一下代码的语义似乎可以满足您的要求。好运。