SR_PRIV int sr_atoi(const char *str, int *ret);
SR_PRIV int sr_atod(const char *str, double *ret);
SR_PRIV int sr_atof(const char *str, float *ret);
+SR_PRIV int sr_atof_ascii(const char *str, float *ret);
/*--- hardware/common/serial.c ----------------------------------------------*/