\r
static int dummy_clock; /* edge detector */\r
\r
-static tap_state_t tap_state_transition(tap_state_t cur_state, int tms);\r
+static int clock_count; /* count clocks in any stable state, only stable states */\r
\r
+static u32 dummy_data;\r
\r
-int dummy_speed(int speed);\r
-int dummy_register_commands(struct command_context_s *cmd_ctx);\r
-int dummy_init(void);\r
-int dummy_quit(void);\r
+\r
+static int dummy_speed(int speed);\r
+static int dummy_register_commands(struct command_context_s *cmd_ctx);\r
+static int dummy_init(void);\r
+static int dummy_quit(void);\r
static int dummy_khz(int khz, int *jtag_speed);\r
static int dummy_speed_div(int speed, int *khz);\r
\r
.quit = dummy_quit,\r
};\r
\r
-int dummy_read(void);\r
-void dummy_write(int tck, int tms, int tdi);\r
-void dummy_reset(int trst, int srst);\r
-void dummy_led(int on);\r
+static int dummy_read(void);\r
+static void dummy_write(int tck, int tms, int tdi);\r
+static void dummy_reset(int trst, int srst);\r
+static void dummy_led(int on);\r
\r
-bitbang_interface_t dummy_bitbang =\r
+static bitbang_interface_t dummy_bitbang =\r
{\r
.read = dummy_read,\r
.write = dummy_write,\r
.blink = dummy_led\r
};\r
\r
-int dummy_read(void)\r
+static int dummy_read(void)\r
{\r
- return 1;\r
+ int data = 1 & dummy_data;\r
+ dummy_data = (dummy_data >> 1) | (1<<31);\r
+ return data;\r
}\r
\r
\r
-void dummy_write(int tck, int tms, int tdi)\r
+static void dummy_write(int tck, int tms, int tdi)\r
{\r
/* TAP standard: "state transitions occur on rising edge of clock" */\r
if( tck != dummy_clock )\r
{\r
if( tck )\r
{\r
- int old_state = dummy_state;\r
- dummy_state = tap_state_transition( dummy_state, tms );\r
+ tap_state_t old_state = dummy_state;\r
+ dummy_state = tap_state_transition( old_state, tms );\r
+\r
if( old_state != dummy_state )\r
- LOG_DEBUG( "dummy_tap=%s", jtag_state_name(dummy_state) );\r
+ {\r
+ if( clock_count )\r
+ {\r
+ LOG_DEBUG("dummy_tap: %d stable clocks", clock_count);\r
+ clock_count = 0;\r
+ }\r
+\r
+ LOG_DEBUG("dummy_tap: %s", tap_state_name(dummy_state) );\r
+\r
+#if defined(DEBUG)\r
+ if(dummy_state == TAP_DRCAPTURE)\r
+ dummy_data = 0x01255043;\r
+#endif\r
+ }\r
+ else\r
+ {\r
+ /* this is a stable state clock edge, no change of state here,\r
+ * simply increment clock_count for subsequent logging\r
+ */\r
+ ++clock_count;\r
+ }\r
}\r
dummy_clock = tck;\r
}\r
}\r
\r
-void dummy_reset(int trst, int srst)\r
+static void dummy_reset(int trst, int srst)\r
{\r
dummy_clock = 0;\r
- dummy_state = TAP_RESET;\r
- LOG_DEBUG( "reset to %s", jtag_state_name(dummy_state) );\r
+\r
+ if (trst || (srst && (jtag_reset_config & RESET_SRST_PULLS_TRST)))\r
+ dummy_state = TAP_RESET;\r
+\r
+ LOG_DEBUG("reset to: %s", tap_state_name(dummy_state) );\r
}\r
\r
static int dummy_khz(int khz, int *jtag_speed)\r
return ERROR_OK;\r
}\r
\r
-int dummy_speed(int speed)\r
+static int dummy_speed(int speed)\r
{\r
return ERROR_OK;\r
}\r
\r
-int dummy_register_commands(struct command_context_s *cmd_ctx)\r
+static int dummy_register_commands(struct command_context_s *cmd_ctx)\r
{\r
return ERROR_OK;\r
}\r
\r
-int dummy_init(void)\r
+static int dummy_init(void)\r
{\r
bitbang_interface = &dummy_bitbang;\r
\r
return ERROR_OK;\r
}\r
\r
-int dummy_quit(void)\r
+static int dummy_quit(void)\r
{\r
return ERROR_OK;\r
}\r
\r
-void dummy_led(int on)\r
+static void dummy_led(int on)\r
{\r
}\r
\r
-\r
-/**\r
- * Function tap_state_transition\r
- * takes a current TAP state and returns the next state according to the tms value.\r
- *\r
- * Even though there is code to duplicate this elsewhere, we do it here a little\r
- * differently just to get a second opinion, i.e. a verification, on state tracking\r
- * in that other logic. Plus array lookups without index checking are no favorite thing.\r
- * This is educational for developers new to TAP controllers.\r
- */\r
-static tap_state_t tap_state_transition(tap_state_t cur_state, int tms)\r
-{\r
- tap_state_t new_state;\r
-\r
- if (tms)\r
- {\r
- switch (cur_state)\r
- {\r
- case TAP_RESET:\r
- new_state = cur_state;\r
- break;\r
- case TAP_IDLE:\r
- case TAP_DRUPDATE:\r
- case TAP_IRUPDATE:\r
- new_state = TAP_DRSELECT;\r
- break;\r
- case TAP_DRSELECT:\r
- new_state = TAP_IRSELECT;\r
- break;\r
- case TAP_DRCAPTURE:\r
- case TAP_DRSHIFT:\r
- new_state = TAP_DREXIT1;\r
- break;\r
- case TAP_DREXIT1:\r
- case TAP_DREXIT2:\r
- new_state = TAP_DRUPDATE;\r
- break;\r
- case TAP_DRPAUSE:\r
- new_state = TAP_DREXIT2;\r
- break;\r
- case TAP_IRSELECT:\r
- new_state = TAP_RESET;\r
- break;\r
- case TAP_IRCAPTURE:\r
- case TAP_IRSHIFT:\r
- new_state = TAP_IREXIT1;\r
- break;\r
- case TAP_IREXIT1:\r
- case TAP_IREXIT2:\r
- new_state = TAP_IRUPDATE;\r
- break;\r
- case TAP_IRPAUSE:\r
- new_state = TAP_IREXIT2;\r
- break;\r
- default:\r
- LOG_ERROR( "fatal: invalid argument cur_state=%d", cur_state );\r
- exit(1);\r
- break;\r
- }\r
- }\r
- else\r
- {\r
- switch (cur_state)\r
- {\r
- case TAP_RESET:\r
- case TAP_IDLE:\r
- case TAP_DRUPDATE:\r
- case TAP_IRUPDATE:\r
- new_state = TAP_IDLE;\r
- break;\r
- case TAP_DRSELECT:\r
- new_state = TAP_DRCAPTURE;\r
- break;\r
- case TAP_DRCAPTURE:\r
- case TAP_DRSHIFT:\r
- case TAP_DREXIT2:\r
- new_state = TAP_DRSHIFT;\r
- break;\r
- case TAP_DREXIT1:\r
- case TAP_DRPAUSE:\r
- new_state = TAP_DRPAUSE;\r
- break;\r
- case TAP_IRSELECT:\r
- new_state = TAP_IRCAPTURE;\r
- break;\r
- case TAP_IRCAPTURE:\r
- case TAP_IRSHIFT:\r
- case TAP_IREXIT2:\r
- new_state = TAP_IRSHIFT;\r
- break;\r
- case TAP_IREXIT1:\r
- case TAP_IRPAUSE:\r
- new_state = TAP_IRPAUSE;\r
- break;\r
- default:\r
- LOG_ERROR( "fatal: invalid argument cur_state=%d", cur_state );\r
- exit(1);\r
- break;\r
- }\r
- }\r
-\r
- return new_state;\r
-}\r
projects / fw / openocd / blobdiff