in some code seen online, i saw that in read function in C, someone uses a uint8_t array for buffer insted of a char array buffer. what are the differences? thanks
The C standard allows char to be signed or unsigned. It also allows it to be more than eight bits.
uint8_t, if it is defined, is unsigned and eight bits. This allows programmers to be completely sure of the type that will be used. In particular, signed char types sometimes cause problems with bitwise and shift operations, due to how these operations are defined (or are not defined) when negative values are involved.