c_cpp 的printf

Posted 2021-05-14

#include <stdarg.h>
#include "SEGGER_RTT.h"

uint32_t log_counter = 0;

void blx_log_info(const char* p) {
  int i = 0;
  while (*(p + i) != '\0') {
    i++;
  }
  SEGGER_RTT_WriteNoLock(0, p, i);
}

void blx_log_printf(const char* fmt, ...) {
  va_list ap;
  char buf[1024] = {0};

  va_start(ap, fmt);
  int ct = vsprintf(buf, fmt, ap);
  if (ct > 0)
    SEGGER_RTT_WriteNoLock(0, buf, ct);
  va_end(ap);
}