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| int | adapter_assert_reset (void) |
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| int | adapter_config_trace (bool enabled, enum tpiu_pin_protocol pin_protocol, uint32_t port_size, unsigned int *trace_freq, unsigned int traceclkin_freq, uint16_t *prescaler) |
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| int | adapter_deassert_reset (void) |
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| int | adapter_poll_trace (uint8_t *buf, size_t *size) |
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| int | adapter_resets (int assert_trst, int assert_srst) |
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| static tap_state_t | jtag_debug_state_machine (const void *tms_buf, const void *tdi_buf, unsigned tap_len, tap_state_t start_tap_state) |
| | Prints verbose TAP state transitions for the given TMS/TDI buffers. More...
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| tap_state_t | jtag_debug_state_machine_ (const void *tms_buf, const void *tdi_buf, unsigned int tap_len, tap_state_t start_tap_state) |
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| tap_state_t | tap_get_end_state (void) |
| | For more information,. More...
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| tap_state_t | tap_get_state (void) |
| | This function gets the state of the "state follower" which tracks the state of the TAPs connected to the cable. More...
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| int | tap_get_tms_path (tap_state_t from, tap_state_t to) |
| | This function provides a "bit sequence" indicating what has to be done with TMS during a sequence of seven TAP clock cycles in order to get from state "from" to state "to". More...
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| int | tap_get_tms_path_len (tap_state_t from, tap_state_t to) |
| | Function int tap_get_tms_path_len returns the total number of bits that represents a TMS path transition as given by the function tap_get_tms_path(). More...
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| bool | tap_is_state_stable (tap_state_t astate) |
| | Function tap_is_state_stable returns true if the astate is stable. More...
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| int | tap_move_ndx (tap_state_t astate) |
| | Function tap_move_ndx when given a stable state, returns an index from 0-5. More...
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| void | tap_set_end_state (tap_state_t new_end_state) |
| | This function sets the state of an "end state follower" which tracks the state that any cable driver thinks will be the end (resultant) state of the current TAP SIR or SDR operation. More...
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| void | tap_set_state_impl (tap_state_t new_state) |
| | implementation of wrapper function tap_set_state() More...
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| tap_state_t | tap_state_transition (tap_state_t current_state, bool tms) |
| | Function tap_state_transition takes a current TAP state and returns the next state according to the tms value. More...
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| void | tap_use_new_tms_table (bool use_new) |
| | Allow switching between old and new TMS tables. More...
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| bool | tap_uses_new_tms_table (void) |
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| #define tap_set_state |
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new_state | ) |
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Value: do { \
tap_set_state_impl(new_state); \
} while (0)
const char * tap_state_name(tap_state_t state)
Function tap_state_name Returns a string suitable for display representing the JTAG tap_state.
This function sets the state of a "state follower" which tracks the state of the TAPs connected to the cable.
The state follower is hopefully always in the same state as the actual TAPs in the jtag chain, and will be so if there are no bugs in the tracking logic within that cable driver.
All the cable drivers call this function to indicate the state they think the TAPs attached to their cables are in. Because this function can also log transitions, it will be helpful to call this function with every transition that the TAPs being manipulated are expected to traverse, not just end points of a multi-step state path.
- Parameters
-
| new_state | The state we think the TAPs are currently in (or are about to enter). |
Definition at line 49 of file interface.h.
This function gets the state of the "state follower" which tracks the state of the TAPs connected to the cable.
- See also
- tap_set_state
- Returns
- tap_state_t The state the TAPs are in now.
Definition at line 37 of file interface.c.
References state_follower.
Referenced by amt_jtagaccel_runtest(), amt_jtagaccel_scan(), amt_jtagaccel_state_move(), angie_queue_pathmove(), angie_queue_runtest(), angie_queue_scan(), angie_queue_stableclocks(), angie_queue_statemove(), armjtagew_path_move(), armjtagew_runtest(), armjtagew_scan(), armjtagew_state_move(), bitbang_path_move(), bitbang_runtest(), bitbang_scan(), bitbang_stableclocks(), bitbang_state_move(), bitq_execute_queue(), bitq_path_move(), bitq_runtest(), bitq_scan_field(), bitq_state_move(), buspirate_path_move(), buspirate_runtest(), buspirate_scan(), buspirate_stableclocks(), buspirate_state_move(), cmsis_dap_execute_scan(), cmsis_dap_pathmove(), cmsis_dap_runtest(), cmsis_dap_stableclocks(), cmsis_dap_state_move(), ftdi_execute_pathmove(), ftdi_execute_runtest(), ftdi_execute_scan(), ftdi_execute_sleep(), ftdi_execute_stableclocks(), ftdi_execute_statemove(), gw16012_path_move(), gw16012_runtest(), gw16012_scan(), gw16012_state_move(), jlink_execute_scan(), jlink_path_move(), jlink_runtest(), jlink_stableclocks(), jlink_state_move(), jtag_vpi_path_move(), jtag_vpi_stableclocks(), jtag_vpi_state_move(), move_to_state(), opendous_path_move(), opendous_runtest(), opendous_scan(), opendous_state_move(), openjtag_execute_runtest(), openjtag_execute_scan(), osbdm_add_pathmove(), osbdm_add_scan(), osbdm_add_stableclocks(), osbdm_add_statemove(), rlink_path_move(), rlink_runtest(), rlink_scan(), rlink_state_move(), syncbb_path_move(), syncbb_runtest(), syncbb_scan(), syncbb_stableclocks(), syncbb_state_move(), ublast_path_move(), ublast_state_move(), ulink_queue_pathmove(), ulink_queue_runtest(), ulink_queue_scan(), ulink_queue_stableclocks(), ulink_queue_statemove(), usbprog_path_move(), usbprog_runtest(), usbprog_scan(), usbprog_state_move(), vdebug_jtag_path_move(), vdebug_jtag_runtest(), vdebug_jtag_scan(), vdebug_jtag_stableclocks(), vdebug_jtag_tlr(), vsllink_execute_queue(), vsllink_path_move(), vsllink_runtest(), vsllink_scan(), vsllink_state_move(), xlnx_pcie_xvc_execute_pathmove(), xlnx_pcie_xvc_execute_runtest(), xlnx_pcie_xvc_execute_scan(), xlnx_pcie_xvc_execute_stableclocks(), and xlnx_pcie_xvc_execute_statemove().
This function provides a "bit sequence" indicating what has to be done with TMS during a sequence of seven TAP clock cycles in order to get from state "from" to state "to".
The length of the sequence must be determined with a parallel call to tap_get_tms_path_len().
- Parameters
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| from | The starting state. |
| to | The desired final state. |
- Returns
- int The required TMS bit sequence, with the first bit in the sequence at bit 0.
Definition at line 190 of file interface.c.
References tap_move_ndx(), and tms_seqs.
Referenced by angie_queue_scan(), angie_queue_statemove(), armjtagew_state_move(), bitbang_state_move(), bitq_state_move(), buspirate_state_move(), cmsis_dap_state_move(), gw16012_state_move(), jlink_state_move(), jtag_add_statemove(), jtag_vpi_state_move(), move_to_state(), opendous_state_move(), osbdm_add_statemove(), rlink_state_move(), syncbb_state_move(), ublast_state_move(), ulink_queue_scan(), ulink_queue_statemove(), usbprog_state_move(), vdebug_jtag_runtest(), vdebug_jtag_scan(), vdebug_jtag_tlr(), vsllink_state_move(), and xlnx_pcie_xvc_execute_statemove().
Function int tap_get_tms_path_len returns the total number of bits that represents a TMS path transition as given by the function tap_get_tms_path().
For at least one interface (JLink) it's not OK to simply "pad" TMS sequences to fit a whole byte. (I suspect this is a general TAP problem within OOCD.) Padding TMS causes all manner of instability that's not easily discovered. Using this routine we can apply EXACTLY the state transitions required to make something work - no more - no less.
- Parameters
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| from | is the starting state |
| to | is the resultant or final state |
- Returns
- int - the total number of bits in a transition.
Definition at line 195 of file interface.c.
References tap_move_ndx(), and tms_seqs.
Referenced by angie_queue_scan(), angie_queue_statemove(), armjtagew_state_move(), bitbang_state_move(), bitq_state_move(), buspirate_state_move(), cmsis_dap_state_move(), ftdi_initialize(), gw16012_state_move(), jlink_state_move(), jtag_add_statemove(), jtag_vpi_state_move(), move_to_state(), opendous_state_move(), osbdm_add_statemove(), rlink_state_move(), syncbb_state_move(), ublast_state_move(), ulink_queue_scan(), ulink_queue_statemove(), vdebug_jtag_runtest(), vdebug_jtag_scan(), vdebug_jtag_tlr(), vsllink_state_move(), and xlnx_pcie_xvc_execute_statemove().
Function tap_move_ndx when given a stable state, returns an index from 0-5.
The index corresponds to a sequence of stable states which are given in this order:
{ TAP_RESET, TAP_IDLE, TAP_DRSHIFT, TAP_DRPAUSE, TAP_IRSHIFT, TAP_IRPAUSE }
This sequence corresponds to look up tables which are used in some of the cable drivers.
- Parameters
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| astate | is the stable state to find in the sequence. If a non stable state is passed, this may cause the program to output an error message and terminate. |
- Returns
- int - the array (or sequence) index as described above
Definition at line 61 of file interface.c.
Referenced by amt_jtagaccel_scan(), amt_jtagaccel_state_move(), tap_get_tms_path(), and tap_get_tms_path_len().
This function sets the state of an "end state follower" which tracks the state that any cable driver thinks will be the end (resultant) state of the current TAP SIR or SDR operation.
At completion of that TAP operation this value is copied into the state follower via tap_set_state().
- Parameters
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| new_end_state | The state the TAPs should enter at completion of a pending TAP operation. |
Definition at line 48 of file interface.c.
References end_state_follower.
Referenced by amt_jtagaccel_end_state(), angie_queue_runtest(), angie_queue_scan(), angie_set_end_state(), armjtagew_end_state(), armjtagew_path_move(), bitbang_end_state(), bitbang_path_move(), bitq_end_state(), bitq_path_move(), buspirate_end_state(), buspirate_path_move(), cmsis_dap_end_state(), ftdi_end_state(), ftdi_execute_pathmove(), gw16012_end_state(), gw16012_path_move(), jlink_end_state(), jlink_path_move(), opendous_end_state(), opendous_path_move(), openjtag_execute_runtest(), openjtag_execute_scan(), openjtag_execute_statemove(), osbdm_add_pathmove(), osbdm_add_scan(), osbdm_add_statemove(), rlink_end_state(), rlink_path_move(), syncbb_end_state(), syncbb_path_move(), ulink_queue_runtest(), ulink_queue_scan(), ulink_set_end_state(), usbprog_end_state(), usbprog_path_move(), vsllink_end_state(), vsllink_path_move(), xlnx_pcie_xvc_execute_command(), xlnx_pcie_xvc_execute_pathmove(), xlnx_pcie_xvc_execute_runtest(), and xlnx_pcie_xvc_execute_scan().
Function tap_state_transition takes a current TAP state and returns the next state according to the tms value.
- Parameters
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| current_state | is the state of a TAP currently. |
| tms | is either zero or non-zero, just like a real TMS line in a jtag interface. |
- Returns
- tap_state_t - the next state a TAP would enter.
Definition at line 223 of file interface.c.
References LOG_ERROR, TAP_DRCAPTURE, TAP_DREXIT1, TAP_DREXIT2, TAP_DRPAUSE, TAP_DRSELECT, TAP_DRSHIFT, TAP_DRUPDATE, TAP_IDLE, TAP_IRCAPTURE, TAP_IREXIT1, TAP_IREXIT2, TAP_IRPAUSE, TAP_IRSELECT, TAP_IRSHIFT, TAP_IRUPDATE, and TAP_RESET.
Referenced by angie_queue_pathmove(), armjtagew_path_move(), bitbang_path_move(), bitq_path_move(), buspirate_path_move(), cmsis_dap_execute_scan(), cmsis_dap_pathmove(), dummy_write(), ftdi_execute_pathmove(), ftdi_execute_scan(), gw16012_path_move(), jlink_execute_scan(), jlink_path_move(), jtag_add_pathmove(), jtag_add_statemove(), jtag_debug_state_machine_(), jtag_vpi_path_move(), move_to_state(), opendous_path_move(), osbdm_add_pathmove(), rlink_path_move(), syncbb_path_move(), ublast_path_move(), ulink_queue_pathmove(), usbprog_path_move(), vdebug_jtag_path_move(), vsllink_path_move(), and xlnx_pcie_xvc_execute_pathmove().
