diff options
Diffstat (limited to 'src/jtag/jtag.c')
| -rw-r--r-- | src/jtag/jtag.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/src/jtag/jtag.c b/src/jtag/jtag.c index cc9f8dc4..a3e8cff8 100644 --- a/src/jtag/jtag.c +++ b/src/jtag/jtag.c @@ -95,6 +95,14 @@ tap_transition_t tap_transitions[16] = {TAP_SDS, TAP_RTI} /* UI */ }; +char* jtag_event_strings[] = +{ + "SRST asserted", + "TRST asserted", + "SRST released", + "TRST released" +}; + enum tap_state end_state = TAP_TLR; enum tap_state cur_state = TAP_TLR; int jtag_trst = 0; @@ -184,6 +192,18 @@ char* jtag_interface = NULL; int jtag_speed = -1; /* forward declarations */ +int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); +int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); +int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); +int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate); +int jtag_add_statemove(enum tap_state endstate); +int jtag_add_pathmove(int num_states, enum tap_state *path); +int jtag_add_runtest(int num_cycles, enum tap_state endstate); +int jtag_add_reset(int trst, int srst); +int jtag_add_end_state(enum tap_state endstate); +int jtag_add_sleep(u32 us); +int jtag_execute_queue(void); +int jtag_cancel_queue(void); /* jtag commands */ int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc); @@ -255,7 +275,7 @@ int jtag_call_event_callbacks(enum jtag_event event) { jtag_event_callback_t *callback = jtag_event_callbacks; - DEBUG("jtag event: %i", event); + DEBUG("jtag event: %s", jtag_event_strings[event]); while (callback) { @@ -1128,7 +1148,8 @@ int jtag_examine_chain() int i; int bit_count; int device_count = 0; - u8 valid = 0x0; + u8 zero_check = 0x0; + u8 one_check = 0xff; field.device = 0; field.num_bits = sizeof(idcode_buffer) * 8; @@ -1150,11 +1171,12 @@ int jtag_examine_chain() for (i = 0; i < JTAG_MAX_CHAIN_SIZE * 4; i++) { - valid |= idcode_buffer[i]; + zero_check |= idcode_buffer[i]; + one_check &= idcode_buffer[i]; } - /* if there wasn't a single non-zero bit, the scan isn't valid */ - if (!valid) + /* if there wasn't a single non-zero bit or if all bits were one, the scan isn't valid */ + if ((zero_check == 0x00) || (one_check == 0xff)) { ERROR("JTAG communication failure, check connection, JTAG interface, target power etc."); exit(-1); |