/*路径*/
char const*const PCBVERPATCH ="sys/devices/system/soc/soc0/hw_pcb_version";
static int get_pcbversion(char const* path){
int pcb_fd;
int pcb_version=0;
char pcbver[8]={'0'};
int count;
pcb_fd=open(PCBVERPATCH, O_RDONLY); /*open*/
if(pcb_fd){
// count=write(pcb_fd, pcbver, 2) ;/*write两个字符，返回写入字符数量*/
count=read(pcb_fd,pcbver,2); /*read读两个字符，返回读取字符数量*/
ALOGE("PCBVERSION device %d %s\n",pcb_fd,pcbver);
}
close(pcb_fd);
return pcb_version;
}