diff options
Diffstat (limited to 'src/jtag/bitbang.c')
| -rw-r--r-- | src/jtag/bitbang.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/jtag/bitbang.c b/src/jtag/bitbang.c index d6ff2898..3d49d186 100644 --- a/src/jtag/bitbang.c +++ b/src/jtag/bitbang.c @@ -17,6 +17,9 @@ * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif #include "bitbang.h" @@ -65,6 +68,38 @@ void bitbang_state_move(void) { cur_state = end_state; } +void bitbang_path_move(pathmove_command_t *cmd) +{ + int num_states = cmd->num_states; + int state_count; + + state_count = 0; + while (num_states) + { + if (tap_transitions[cur_state].low == cmd->path[state_count]) + { + bitbang_interface->write(0, 0, 0); + bitbang_interface->write(1, 0, 0); + } + else if (tap_transitions[cur_state].high == cmd->path[state_count]) + { + bitbang_interface->write(0, 1, 0); + bitbang_interface->write(1, 1, 0); + } + else + { + ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_strings[cur_state], tap_state_strings[cmd->path[state_count]]); + exit(-1); + } + + cur_state = cmd->path[state_count]; + state_count++; + num_states--; + } + + end_state = cur_state; +} + void bitbang_runtest(int num_cycles) { int i; @@ -187,6 +222,12 @@ int bitbang_execute_queue(void) bitbang_end_state(cmd->cmd.statemove->end_state); bitbang_state_move(); break; + case JTAG_PATHMOVE: +#ifdef _DEBUG_JTAG_IO_ + DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]); +#endif + bitbang_path_move(cmd->cmd.pathmove); + break; case JTAG_SCAN: #ifdef _DEBUG_JTAG_IO_ DEBUG("scan end in %i", cmd->cmd.scan->end_state); |