how to convert string to hexadecimal?

Question

I have a string 0xFF, is there any function like atoi which reads that string and save in a uint32_t format?

Answer 1

const char *str = "0xFF";
uint32_t value;
if (1 == sscanf(str, "0x%"SCNx32, &value)) {
    // value now contains the value in the string--decimal 255, in this case.
}