void
tap_capture_dr( chain_t *chain )
{
if ((tap_state( chain ) & (TAPSTAT_RESET | TAPSTAT_IDLE)) != TAPSTAT_IDLE)
printf( _("%s: Invalid state: %2X\n"), "tap_capture_dr", tap_state( chain ) );
/* Run-Test/Idle or Update-DR or Update-IR state */
chain_clock( chain, 1, 0 ); /* Select-DR-Scan */
chain_clock( chain, 0, 0 ); /* Capture-DR */
}
/**
* bus->driver->(*init)
*
*/
static int
jopcyc_bus_init( bus_t *bus )
{
part_t *p = PART;
chain_t *chain = CHAIN;
component_t *comp;
if (tap_state(chain) != Run_Test_Idle) {
/* silently skip initialization if TAP isn't in RUNTEST/IDLE state
this is required to avoid interfering with detect when initbus
is contained in the part description file
bus_init() will be called latest by bus_prepare() */
return URJTAG_STATUS_OK;
}
/* Preload update registers
See AN039, "Guidelines for IEEE Std. 1149.1 Boundary Scan Testing */
part_set_instruction( p, "SAMPLE/PRELOAD" );
chain_shift_instructions( chain );
/* RAMA */
comp = COMP_RAMA;
set_data_in( bus, comp );
part_set_signal( p, nCS, 1, 1 );
part_set_signal( p, nWE, 1, 1 );
part_set_signal( p, nOE, 1, 1 );
part_set_signal( p, nLB, 1, 1 );
part_set_signal( p, nUB, 1, 1 );
/* RAMB */
comp = COMP_RAMB;
set_data_in( bus, comp );
part_set_signal( p, nCS, 1, 1 );
part_set_signal( p, nWE, 1, 1 );
part_set_signal( p, nOE, 1, 1 );
part_set_signal( p, nLB, 1, 1 );
part_set_signal( p, nUB, 1, 1 );
/* FLASH */
comp = COMP_FLASH;
set_data_in( bus, comp );
part_set_signal( p, nCS, 1, 1 );
part_set_signal( p, nWE, 1, 1 );
part_set_signal( p, nOE, 1, 1 );
part_set_signal( p, nCS2, 1, 1 );
part_set_signal( p, nRDY, 0, 0 );
/* Serial Port */
part_set_signal( p, SER_RXD, 0, 0 );
part_set_signal( p, SER_NRTS, 1, 1 );
part_set_signal( p, SER_TXD, 1, 1 );
part_set_signal( p, SER_NCTS, 0, 0 );
chain_shift_data_registers( chain, 0 );
INITIALIZED = 1;
return URJTAG_STATUS_OK;
}
void
tap_shift_register( chain_t *chain, const tap_register *in, tap_register *out, int exit )
{
int i;
if (!(tap_state( chain ) & TAPSTAT_SHIFT))
printf( _("%s: Invalid state: %2X\n"), "tap_shift_register", tap_state( chain ) );
/* Capture-DR, Capture-IR, Shift-DR, Shift-IR, Exit2-DR or Exit2-IR state */
if (tap_state( chain ) & TAPSTAT_CAPTURE)
chain_clock( chain, 0, 0 ); /* save last TDO bit :-) */
for (i = 0; i < in->len; i++) {
if (out && (i < out->len))
out->data[i] = cable_get_tdo( chain->cable );
chain_clock( chain, (exit && ((i + 1) == in->len)) ? 1 : 0, in->data[i] ); /* Shift (& Exit1) */
}
/* Shift-DR, Shift-IR, Exit1-DR or Exit1-IR state */
if (exit) {
chain_clock( chain, 1, 0 ); /* Update-DR or Update-IR */
chain_clock( chain, 0, 0 ); /* Run-Test/Idle */
}
}
/**
* bus->driver->(*init)
*
*/
static int
s3c4510_bus_init( bus_t *bus )
{
part_t *p = PART;
chain_t *chain = CHAIN;
if (tap_state(chain) != Run_Test_Idle) {
/* silently skip initialization if TAP isn't in RUNTEST/IDLE state
this is required to avoid interfering with detect when initbus
is contained in the part description file
bus_init() will be called latest by bus_prepare() */
return URJTAG_STATUS_OK;
}
part_set_instruction( p, "SAMPLE/PRELOAD" );
chain_shift_instructions( chain );
chain_shift_data_registers( chain, 0 );
INITIALIZED = 1;
return URJTAG_STATUS_OK;
}
/*
* svf_goto_state(state)
*
* Moves from any TAP state to the specified state.
* The state traversal is done according to the SVF specification.
* See STATE of the Serial Vector Format Specification
*
* Encoding of state is according to the jtag suite's defines.
*
* Parameter:
* state : new TAP controller state
*/
static void
svf_goto_state( chain_t *chain, int new_state)
{
int current_state;
current_state = tap_state(chain);
/* handle unknown state */
if (new_state == Unknown_State)
new_state = Test_Logic_Reset;
/* abort if new_state already reached */
if (current_state == new_state)
return;
switch (current_state) {
case Test_Logic_Reset:
chain_clock(chain, 0, 0, 1);
break;
case Run_Test_Idle:
chain_clock(chain, 1, 0, 1);
break;
case Select_DR_Scan:
case Select_IR_Scan:
if (new_state == Test_Logic_Reset ||
new_state == Run_Test_Idle ||
(current_state & TAPSTAT_DR && new_state & TAPSTAT_IR) ||
(current_state & TAPSTAT_IR && new_state & TAPSTAT_DR))
/* progress in select-idle/reset loop */
chain_clock(chain, 1, 0, 1);
else
/* enter DR/IR branch */
chain_clock(chain, 0, 0, 1);
break;
case Capture_DR:
if (new_state == Shift_DR)
/* enter Shift_DR state */
chain_clock(chain, 0, 0, 1);
else
/* bypass Shift_DR */
chain_clock(chain, 1, 0, 1);
break;
case Capture_IR:
if (new_state == Shift_IR)
/* enter Shift_IR state */
chain_clock(chain, 0, 0, 1);
else
/* bypass Shift_IR */
chain_clock(chain, 1, 0, 1);
break;
case Shift_DR:
case Shift_IR:
/* progress to Exit1_DR/IR */
chain_clock(chain, 1, 0, 1);
break;
case Exit1_DR:
if (new_state == Pause_DR)
/* enter Pause_DR state */
chain_clock(chain, 0, 0, 1);
else
/* bypass Pause_DR */
chain_clock(chain, 1, 0, 1);
break;
case Exit1_IR:
if (new_state == Pause_IR)
/* enter Pause_IR state */
chain_clock(chain, 0, 0, 1);
else
/* bypass Pause_IR */
chain_clock(chain, 1, 0, 1);
break;
case Pause_DR:
case Pause_IR:
/* progress to Exit2_DR/IR */
chain_clock(chain, 1, 0, 1);
break;
case Exit2_DR:
if (new_state == Shift_DR)
/* enter Shift_DR state */
chain_clock(chain, 0, 0, 1);
else
/* progress to Update_DR */
chain_clock(chain, 1, 0, 1);
break;
case Exit2_IR:
if (new_state == Shift_IR)
/* enter Shift_IR state */
chain_clock(chain, 0, 0, 1);
else
/* progress to Update_IR */
chain_clock(chain, 1, 0, 1);
break;
case Update_DR:
case Update_IR:
if (new_state == Run_Test_Idle)
/* enter Run_Test_Idle */
chain_clock(chain, 0, 0, 1);
else
/* progress to Select_DR/IR */
chain_clock(chain, 1, 0, 1);
break;
default:
svf_force_reset_state(chain);
break;
}
/* continue state changes */
svf_goto_state(chain, new_state);
}
