diff --git a/src/cable.hpp b/src/cable.hpp
index e191097..7c81709 100644
--- a/src/cable.hpp
+++ b/src/cable.hpp
@@ -6,12 +6,24 @@
 
 #include "ftdipp_mpsse.hpp"
 
-static std::map <std::string, FTDIpp_MPSSE::mpsse_bit_config> cable_list = {
-	{"digilent",     {0x0403, 0x6010, INTERFACE_A, 0xe8, 0xeb, 0x00, 0x60}},
-	{"digilent_hs2", {0x0403, 0x6014, INTERFACE_A, 0xe8, 0xeb, 0x00, 0x60}},
-	{"digilent_hs3", {0x0403, 0x6014, INTERFACE_A, 0x88, 0x8B, 0x20, 0x30}},
-	{"ft2232",       {0x0403, 0x6010, INTERFACE_A, 0x08, 0x0B, 0x08, 0x0B}},
-	{"ft232RL",      {0x0403, 0x6001, INTERFACE_A, 0x08, 0x0B, 0x08, 0x0B}}
+/*!
+ * \brief define type of communication
+ */
+enum {
+	MODE_FTDI_BITBANG = 0, /*! used with ft232RL/ft231x */
+	MODE_FTDI_SERIAL  = 1  /*! ft2232, ft232H */
+} communication_type_t;
+
+typedef struct {
+	int type;
+	FTDIpp_MPSSE::mpsse_bit_config config;
+} cable_t;
+
+static std::map <std::string, cable_t> cable_list = {
+	{"digilent",     {MODE_FTDI_SERIAL,  {0x0403, 0x6010, INTERFACE_A, 0xe8, 0xeb, 0x00, 0x60}}},
+	{"digilent_hs2", {MODE_FTDI_SERIAL,  {0x0403, 0x6014, INTERFACE_A, 0xe8, 0xeb, 0x00, 0x60}}},
+	{"digilent_hs3", {MODE_FTDI_SERIAL,  {0x0403, 0x6014, INTERFACE_A, 0x88, 0x8B, 0x20, 0x30}}},
+	{"ft2232",       {MODE_FTDI_SERIAL,  {0x0403, 0x6010, INTERFACE_A, 0x08, 0x0B, 0x08, 0x0B}}}
 };
 
 #endif