HtifCmd
uint64 HtifCmd(uint32 device, uint8 cmd, uint32 arg);
HtifCmd(0, 0, 1);
HtifCmd(1, 1, ch);
HtifCmd(0, 0, 1);
HtifCmd(1, 1, ch);
return (HtifCmd(2, 0, 0) / 1000000);