这是这里帖子的后续内容 - Writting data to the Arduino's onboard EEPROM我刚尝试使用网址中的代码片段，但无效 . 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]);
}
}
1 回答
好吧，你需要修复你的代码：
第8行 - []需要在stringToWrite第12行之后 - 在修复第8行后应该会变好
第22行 - 你需要取消引用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）
这修复了编译器错误 . 快速查看代码的语义似乎正在做你想要的 . 祝好运 .