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msp432p401lp-cc256x: implement puts and putchar

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This commit is contained in:
Matthias Ringwald 2020-11-25 22:07:47 +01:00
parent 0cec242b70
commit 3c367d7cc3
1 changed files with 12 additions and 4 deletions
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16
port/msp432p401lp-cc256x/main.c
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@ -101,9 +101,6 @@ int _fstat(int file){
return -1; return -1;
} }
// with current Makefile, compiler, and linker flags, printf will call malloc -> sbrk
// we define printf, but compiler will replace call to printf with call to puts, which causes malloc -> sbrk again
// end of bss, start of heap // end of bss, start of heap
extern int _end; extern int _end;
void * _sbrk(int incr){ void * _sbrk(int incr){
@ -124,11 +121,22 @@ void * _sbrk(int incr){
int SEGGER_RTT_vprintf(unsigned BufferIndex, const char * sFormat, va_list * pParamList); int SEGGER_RTT_vprintf(unsigned BufferIndex, const char * sFormat, va_list * pParamList);
// gcc/clang map printf to puts or putchar for printf("...\n"), or printf("%c", c) respectively
int puts(const char * s){
SEGGER_RTT_WriteString(0, s);
SEGGER_RTT_PutChar(0, '\n');
}
int putchar(int c){
SEGGER_RTT_PutChar(0, c);
}
int printf(const char * format, ...){ int printf(const char * format, ...){
va_list argptr; va_list argptr;
va_start(argptr, format); va_start(argptr, format);
SEGGER_RTT_vprintf(0, format, &argptr); SEGGER_RTT_vprintf(0, format, &argptr);
va_end(argptr); va_end(argptr);
} }
int vprintf(const char * format, va_list argptr){ int vprintf(const char * format, va_list argptr){