c - Typecasting return value of function to pointer type -

i have following code:

#define pll0stat        (*((volatile unsigned short*) 0xe01fc088)) // function prototypes void diaplayinrow1withposition(unsigned char* data, unsigned char position); unsigned char convertlowernibbletoasciivalue(unsigned char data); void func1 (void) {     unsigned char temp = (unsigned char) pll0stat; // interested in last byte     temp = convertlowernibbletoasciivalue(temp);     diaplayinrow1withposition(&temp,15); } 

instead of above code, thought replace last line 1 step , used below statement

diaplayinrow1withposition(((unsigned char*)convertlowernibbletoasciivalue(temp3)),15); 

but code compiles correctly, nothing displayed in lcd. not able makeout reason. typecasting done correctly pointer thought. there other issue?

the original code fine. why trying turn unreadable one-liner, have no idea. not gain performance, achieve nothing, obfuscate code. can see need ask question: have made code unreadable yourself. leave code was.

the actual bug comes strange cast (unsigned char*) have added.