diff --git a/.gitignore b/.gitignore
index 17424be2..22742a60 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,4 +17,5 @@ tags
 blackmagic_upgrade
 *.exe
 .DS_Store
+.vscode
 cscope.out
diff --git a/src/Makefile b/src/Makefile
index 4de58a92..1bc4b8fc 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -64,12 +64,12 @@ ifndef TARGET
 TARGET=blackmagic
 endif
 
-ifndef SWD_HL
-SRC += swdptap.c swdptap_generic.c
+ifdef NO_OWN_LL
+SRC += jtagtap_generic.c swdptap_generic.c
 endif
 
-ifndef JTAG_HL
-SRC += jtag_scan.c jtagtap.c jtagtap_generic.c
+ifndef OWN_HL
+SRC += jtag_scan.c jtagtap.c swdptap.c
 endif
 
 OBJ = $(SRC:.c=.o)
diff --git a/src/include/gdb_if.h b/src/include/gdb_if.h
index 33074549..d2ad2439 100644
--- a/src/include/gdb_if.h
+++ b/src/include/gdb_if.h
@@ -21,7 +21,7 @@
 #ifndef __GDB_IF_H
 #define __GDB_IF_H
 
-#if !defined(LIBFTDI)
+#if !defined(PC_HOSTED)
 #include <libopencm3/usb/usbd.h>
 void gdb_usb_out_cb(usbd_device *dev, uint8_t ep);
 #endif
diff --git a/src/include/platform_support.h b/src/include/platform_support.h
index f595ad1e..d431393f 100644
--- a/src/include/platform_support.h
+++ b/src/include/platform_support.h
@@ -24,7 +24,7 @@
 #	error "Include 'general.h' instead"
 #endif
 
-#if defined(LIBFTDI)
+#if defined(PC_HOSTED)
 void platform_init(int argc, char **argv);
 #else
 void platform_init(void);
diff --git a/src/include/swdptap.h b/src/include/swdptap.h
index 706a21ad..f9ec279a 100644
--- a/src/include/swdptap.h
+++ b/src/include/swdptap.h
@@ -23,7 +23,9 @@
 
 int swdptap_init(void);
 
-/* High level functions, provided as weak in swdptap_generic.c */
+/* Low level functions, provided in swdptap_generic.c from the primitives
+   (indicate NO_OWN_LL in the Makefile.inc or libopencm specific in 
+   platforms/common*/
 uint32_t swdptap_seq_in(int ticks);
 bool swdptap_seq_in_parity(uint32_t *data, int ticks);
 void swdptap_seq_out(uint32_t MS, int ticks);
diff --git a/src/main.c b/src/main.c
index de119536..26e8ffd5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -33,7 +33,7 @@
 int
 main(int argc, char **argv)
 {
-#if defined(LIBFTDI)
+#if defined(PC_HOSTED)
 	platform_init(argc, argv);
 #else
 	(void) argc;
diff --git a/src/platforms/stm32/jtagtap.c b/src/platforms/common/jtagtap.c
similarity index 100%
rename from src/platforms/stm32/jtagtap.c
rename to src/platforms/common/jtagtap.c
diff --git a/src/platforms/jeff/Makefile.inc b/src/platforms/jeff/Makefile.inc
index c560b944..81594441 100644
--- a/src/platforms/jeff/Makefile.inc
+++ b/src/platforms/jeff/Makefile.inc
@@ -2,6 +2,8 @@ CROSS_COMPILE ?= arm-none-eabi-
 CC = $(CROSS_COMPILE)gcc
 OBJCOPY = $(CROSS_COMPILE)objcopy
 
+NO_OWN_LL = 1
+
 ifeq ($(ENABLE_DEBUG), 1)
 CFLAGS += -DDEBUG_ME
 CFLAGS += -DENABLE_DEBUG
diff --git a/src/platforms/libftdi/Makefile.inc b/src/platforms/libftdi/Makefile.inc
index c22d101d..06c07d76 100644
--- a/src/platforms/libftdi/Makefile.inc
+++ b/src/platforms/libftdi/Makefile.inc
@@ -1,5 +1,5 @@
 SYS = $(shell $(CC) -dumpmachine)
-CFLAGS += -DLIBFTDI -DENABLE_DEBUG
+CFLAGS += -DPC_HOSTED -DENABLE_DEBUG
 LDFLAGS += -lftdi1
 ifneq (, $(findstring mingw, $(SYS)))
 LDFLAGS +=  -lusb-1.0 -lws2_32
diff --git a/src/platforms/pc-stlinkv2/Makefile.inc b/src/platforms/pc-stlinkv2/Makefile.inc
index 7fa24790..53ec16a1 100644
--- a/src/platforms/pc-stlinkv2/Makefile.inc
+++ b/src/platforms/pc-stlinkv2/Makefile.inc
@@ -1,6 +1,6 @@
 TARGET=blackmagic_stlinkv2
 SYS = $(shell $(CC) -dumpmachine)
-CFLAGS += -DLIBFTDI  -DSTLINKV2 -DJTAG_HL -DENABLE_DEBUG
+CFLAGS += -DPC_HOSTED  -DSTLINKV2 -DJTAG_HL -DENABLE_DEBUG
 CFLAGS +=-I ./target
 LDFLAGS += -lusb-1.0
 ifneq (, $(findstring mingw, $(SYS)))
@@ -11,5 +11,4 @@ LDFLAGS += -lws2_32
 endif
 VPATH += platforms/pc
 SRC += 	timing.c stlinkv2.c
-SWD_HL = 1
-JTAG_HL = 1
+OWN_HL = 1
diff --git a/src/target/swdptap_generic.c b/src/target/swdptap_generic.c
index f7954100..2b386c52 100644
--- a/src/target/swdptap_generic.c
+++ b/src/target/swdptap_generic.c
@@ -101,8 +101,7 @@ swdptap_seq_in(int ticks)
 	return ret;
 }
 
-bool __attribute__((weak))
-swdptap_seq_in_parity(uint32_t *ret, int ticks)
+bool swdptap_seq_in_parity(uint32_t *ret, int ticks)
 {
 	uint32_t index = 1;
 	uint8_t parity = 0;
@@ -123,8 +122,7 @@ swdptap_seq_in_parity(uint32_t *ret, int ticks)
 	return parity;
 }
 
-void __attribute__((weak))
-swdptap_seq_out(uint32_t MS, int ticks)
+void swdptap_seq_out(uint32_t MS, int ticks)
 {
 	swdptap_set_out();
 
@@ -134,8 +132,7 @@ swdptap_seq_out(uint32_t MS, int ticks)
 	}
 }
 
-void __attribute__((weak))
-swdptap_seq_out_parity(uint32_t MS, int ticks)
+void swdptap_seq_out_parity(uint32_t MS, int ticks)
 {
 	uint8_t parity = 0;
 
diff --git a/src/target/target.c b/src/target/target.c
index 48dc7488..db396a38 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -314,7 +314,7 @@ void target_detach(target *t)
 {
 	t->detach(t);
 	t->attached = false;
-#if defined(LIBFTDI)
+#if defined(PC_HOSTED)
 # include "platform.h"
 	platform_buffer_flush();
 #endif