I'm trying to add printf functionality on LINFlex_1 on an MPC5675K. I have written the stub functions InitializeUART, ReadUARTN, and WriteUARTN, but these are never called. No warnings or errors either. When I look at what is compiled from the EWL C library, it makes no sense to me. This is the program flow after calling printf("rbInit"):
printformat.c
line 114 __pformatter
line 95 {
line 113 va_start
line 114 __pformatter
line 113 va_start
line 114 __pformatter
line 113 va_start
line 114 __pformatter
line 1906 {
runtime.c
__create_frame_and_save_gpr_21
printformat.c
line 2138 num_chars = ...
line 1932 chars_written = 0
line 2377 *buff_ptr = '%'
line 1934 while(*format_ptr) {
line 2479 return (chars_written)
runtime.c
__restore_gpr_21_exit
And finally back to main. num_chars is never updated, buffers seem to be filled with all 0's, and many lines of code are just never executed or compiled. What is going on here?
