jtag_add_shift() fn - minidriver work in progress.

git-svn-id: svn://svn.berlios.de/openocd/trunk@367 b42882b7-edfa-0310-969c-e2dbd0fdcd60

1 files changed, 30 insertions, 0 deletions

diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h
index e190858a..f5602f1f 100644
--- a/src/jtag/jtag.h
+++ b/src/jtag/jtag.h
@@ -22,6 +22,7 @@
 
 #include "types.h"
 #include "binarybuffer.h"
+#include "log.h"
 
 #include "command.h"
 
@@ -289,6 +290,9 @@ extern int jtag_add_end_state(enum tap_state endstate);
 extern int interface_jtag_add_end_state(enum tap_state endstate);
 extern int jtag_add_sleep(u32 us);
 extern int interface_jtag_add_sleep(u32 us);
+
+
+
 /*
  * For software FIFO implementations, the queued commands can be executed 
  * during this call or earlier. A sw queue might decide to push out
@@ -340,4 +344,30 @@ extern int jtag_verify_capture_ir;
 #define ERROR_JTAG_DEVICE_ERROR			(-107)
 
 
+/* Here a #define MINIDRIVER() and an inline version of hw fifo interface_jtag_add_shift can be defined */
+
+#ifndef MINIDRIVER 
+extern int interface_jtag_add_shift(const enum tap_state shift_state, const enum tap_state end_state, int bits, u32 value);
+#endif
+
+/* Enter the shift_state and cycle "bits" times out of that state.
+ * 
+ * So if the end_state!=shift_state, then the transition from shift_state to 
+ * end_state counts as a transition out of shift_state.
+ * 
+ * Legal shift states TAP_SD and TAP_SI
+ * 
+ * Legal end state does not include TAP_TLR
+ * 
+ * Bits are clocked out from value LSB first.
+ */
+static __inline int jtag_add_shift(const enum tap_state shift_state, const enum tap_state end_state, int bits, u32 value)
+{
+	int retval;
+	retval=interface_jtag_add_shift(shift_state, end_state, bits, value);
+	cmd_queue_end_state = end_state;
+	return retval;
+}
+
+
 #endif /* JTAG_H */