// This command sequence is to detect how many devices is on the JTAG chain
TRST OFF;
ENDIR IDLE;
ENDDR IDLE;
STATE RESET IDLE;
TIR 0 ;
HIR 0 ;
TDR 0 ;
HDR 0 ;
// load enough ones to fill all IRs with 'bypass' command
SIR 128 TDI (ffffffffffffffffffffffffffffffff);
// shift 1 many times and see where it will show up, i.e. if it is in bit3
// then we have 2 devices in the chain
SDR 32 TDI (00000001);