diff options
Diffstat (limited to 'src/jtag/dummy.c')
| -rw-r--r-- | src/jtag/dummy.c | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/src/jtag/dummy.c b/src/jtag/dummy.c index bfdf0dcc..434a28de 100644 --- a/src/jtag/dummy.c +++ b/src/jtag/dummy.c @@ -32,8 +32,13 @@ static tap_state_t dummy_state = TAP_RESET; static int dummy_clock; /* edge detector */
+static int clock_count; /* count clocks in any stable state, only stable states */
+
+
static tap_state_t tap_state_transition(tap_state_t cur_state, int tms);
+static u32 dummy_data;
+
int dummy_speed(int speed);
int dummy_register_commands(struct command_context_s *cmd_ctx);
@@ -76,7 +81,9 @@ bitbang_interface_t dummy_bitbang = int dummy_read(void)
{
- return 1;
+ int data = 1 & dummy_data;
+ dummy_data = (dummy_data >> 1) | (1<<31);
+ return data;
}
@@ -88,9 +95,30 @@ void dummy_write(int tck, int tms, int tdi) if( tck )
{
int old_state = dummy_state;
- dummy_state = tap_state_transition( dummy_state, tms );
+ dummy_state = tap_state_transition( old_state, tms );
+
if( old_state != dummy_state )
- LOG_DEBUG( "dummy_tap=%s", jtag_state_name(dummy_state) );
+ {
+ if( clock_count )
+ {
+ LOG_DEBUG("dummy_tap: %d stable clocks", clock_count);
+ clock_count = 0;
+ }
+
+ LOG_DEBUG("dummy_tap: %s", jtag_state_name(dummy_state) );
+
+#if defined(DEBUG)
+ if(dummy_state == TAP_DRCAPTURE)
+ dummy_data = 0x01255043;
+#endif
+ }
+ else
+ {
+ /* this is a stable state clock edge, no change of state here,
+ * simply increment clock_count for subsequent logging
+ */
+ ++clock_count;
+ }
}
dummy_clock = tck;
}
@@ -99,8 +127,11 @@ void dummy_write(int tck, int tms, int tdi) void dummy_reset(int trst, int srst)
{
dummy_clock = 0;
- dummy_state = TAP_RESET;
- LOG_DEBUG( "reset to %s", jtag_state_name(dummy_state) );
+
+ if (trst || (srst && (jtag_reset_config & RESET_SRST_PULLS_TRST)))
+ dummy_state = TAP_RESET;
+
+ LOG_DEBUG("reset to: %s", jtag_state_name(dummy_state) );
}
static int dummy_khz(int khz, int *jtag_speed)
|