Sy i'm a beginner, but i didn't understand what means this variable statement
(uint8_t*) &var
thx in advance
NP
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&var is address of var variable and (uint8_t*) is a cast to type uint8_t* pointer from any it means that the result of this statement is address of uint8_t (same as unsigned char - 1 byte).
"var" is a variable of unknown type and size. It is stored in memory at address &var. To access that memory with a different type and size of variable you can cast it to a different pointer type, "uint8_t *" in this case.
For instance, if "var" is an unsigned integer "2969", and the system stores them "little endian" in memory, then in the following code:
unsigned int var = 2969; // Assign initial value
uint8_t *ptr; // Create pointer variable
ptr = (uint8_t *) &var; // Point variable at first memory location
uint8_t out = *ptr; // Get contents from memory address pointed to by pointer
"out" would end up containing 153, since the value 2969 is made up of two bytes, 153 and 11 (11 * 256 + 153 = 2969), and 153 is the "low order" byte of the two that make up the integer value.