I'm trying to rewrite C code to python, but I'm not sure how to express this part in python
#include <EEPROM.h>
#define EEPROM_write(address, p) {int i = 0; byte *pp = (byte*)&(p);for(; i < sizeof(p); i++) EEPROM.write(address+i, pp[i]);}
I think I should use I2C object from machine, but I'm not sure what is going on in the C version
Let's dissect the macro line:
#define
This is the preprocessor command to define a macro.
EEPROM_write(address, p)
The macro is named "EEPROM_write" and it takes two arguments, "address" and "p". Since the preprocessor is mostly working here as a search-and-replace mechanism, there are no types. They depend on the site where the macro is used.
{
int i = 0;
byte *pp = (byte*)&(p);
for (; i < sizeof(p); i++)
EEPROM.write(address+i, pp[i]);
}
This is the formatted C code of the replacement. It consist of a single block of statements, and the preprocessor will replace each occurence of address and p with the arguments given at the usage of the macro.
The code block takes the address of p as a byte pointer. Then it loops through all bytes of p (including padding) and calls EEPROM.write() with consecutive addresses (starting at address) and the respective byte of p.
