first draft half duplex simulation

include/em4x50.h

@@ -37,6 +37,9 @@
 #define TIMEOUT                     2000
 #define DUMP_FILESIZE               136
 #define EM4X50_MAX_NO_SAMPLES       1000
+#define EM4X50_MAX_TIME_SAMPLES     1000
+
+#define BYTES2UINT32(x) ((x[0] << 24) | (x[1] << 16) | (x[2] << 8) | (x[3]))
 
 typedef struct {
     bool addr_given;