cfe_read
while ((res = cfe_read(conhandle,&ch,1)) == 0) ; /* null loop */
int cfe_read(int handle, unsigned char *buffer, int length);
cc = cfe_read(booted_dev_fd,pkt,len);
int cfe_read(int handle, unsigned char *buffer, int length);
while ((res = cfe_read(conhandle,&ch,1)) == 0) ; /* null loop */
int cfe_read(int handle, unsigned char *buffer, int length);
cc = cfe_read(booted_dev_fd,pkt,len);