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implemented control of TRST

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git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@1009 b68d4a1b-bc3d-0410-92ed-d4ac073336b7
master
Arnim Läuger 17 years ago
parent 0da6084704
commit bdeb6e66ea
2 changed files with 75 additions and 24 deletions
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6
jtag/ChangeLog
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@ -1,3 +1,9 @@
2008-02-13 Arnim Laeuger <arniml@users.sourceforge.net>
* src/tap/cable/ft2232.c: implemented control of TRST
second step of
[ 1891845 ] Add support for TRST/SRST/LEDs to FT2232 cable driver
2008-02-12 Arnim Laeuger <arniml@users.sourceforge.net>
* src/tap/cable/ft2232.c: statically set GPIO high byte with product-specific values

93
jtag/src/tap/cable/ft2232.c
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@ -116,6 +116,13 @@ typedef struct {
uint8_t low_byte_value;
uint8_t low_byte_dir;
/* this driver supports TRST control on high byte only
set the variables below with value/direction for active and inactive TRST line
static settings for other high byte signals must be entered here as well */
uint8_t high_byte_value_trst_active;
uint8_t high_byte_value_trst_inactive;
uint8_t high_byte_dir;
/* variables to save last TDO value
this acts as a cache to prevent multiple "Read Data Bits Low" transfer
over USB for ft2232_get_tdo */
@ -310,9 +317,12 @@ ft2232_generic_init( cable_t *cable )
push_to_send( params, 0 );
/* Set Data Bits High Byte */
params->high_byte_value_trst_active = 0;
params->high_byte_value_trst_inactive = 0;
params->high_byte_dir = 0;
push_to_send( params, SET_BITS_HIGH );
push_to_send( params, 0 );
push_to_send( params, 0 );
push_to_send( params, params->high_byte_value_trst_inactive );
push_to_send( params, params->high_byte_dir );
send_and_receive( cable );
params->mpsse_frequency = FT2232_MAX_TCK_FREQ;
@ -352,16 +362,19 @@ ft2232_jtagkey_init( cable_t *cable )
push_to_send( params, 0 );
/* Set Data Bits High Byte
static low byte value and direction:
default:
TRST_N_OUT = 1
TRST_N_OE_N = 0
SRST_N_OUT = 1
SRST_N_OE_N = 0 */
params->high_byte_value_trst_active = BITMASK_JTAGKEY_SRST_N_OUT;
params->high_byte_value_trst_inactive = BITMASK_JTAGKEY_TRST_N_OUT | BITMASK_JTAGKEY_SRST_N_OUT;
params->high_byte_dir = BITMASK_JTAGKEY_TRST_N_OUT | BITMASK_JTAGKEY_TRST_N_OE_N |
BITMASK_JTAGKEY_SRST_N_OUT | BITMASK_JTAGKEY_SRST_N_OE_N;
push_to_send( params, SET_BITS_HIGH );
push_to_send( params, BITMASK_JTAGKEY_TRST_N_OUT |
BITMASK_JTAGKEY_SRST_N_OUT );
push_to_send( params, BITMASK_JTAGKEY_TRST_N_OUT | BITMASK_JTAGKEY_TRST_N_OE_N |
BITMASK_JTAGKEY_SRST_N_OUT | BITMASK_JTAGKEY_SRST_N_OE_N );
push_to_send( params, params->high_byte_value_trst_inactive );
push_to_send( params, params->high_byte_dir );
send_and_receive( cable );
params->mpsse_frequency = FT2232_MAX_TCK_FREQ;
@ -402,16 +415,22 @@ ft2232_armusbocd_init( cable_t *cable )
push_to_send( params, 0 );
/* Set Data Bits High Byte
default:
TRST = 1
TRST buffer enable = 0
TSRST = 1
RED LED on */
params->high_byte_value_trst_active = BITMASK_ARMUSBOCD_nTSRST |
BITMASK_ARMUSBOCD_RED_LED;
params->high_byte_value_trst_inactive = BITMASK_ARMUSBOCD_nTRST |
BITMASK_ARMUSBOCD_nTSRST |
BITMASK_ARMUSBOCD_RED_LED;
params->high_byte_dir = BITMASK_ARMUSBOCD_nTRST | BITMASK_ARMUSBOCD_nTRST_nOE |
BITMASK_ARMUSBOCD_nTSRST |
BITMASK_ARMUSBOCD_RED_LED;
push_to_send( params, SET_BITS_HIGH );
push_to_send( params, BITMASK_ARMUSBOCD_nTRST |
BITMASK_ARMUSBOCD_RED_LED );
push_to_send( params, BITMASK_ARMUSBOCD_nTRST | BITMASK_ARMUSBOCD_nTRST_nOE |
BITMASK_ARMUSBOCD_nTSRST |
BITMASK_ARMUSBOCD_RED_LED );
push_to_send( params, params->high_byte_value_trst_inactive );
push_to_send( params, params->high_byte_dir );
send_and_receive( cable );
params->mpsse_frequency = FT2232_MAX_TCK_FREQ;
@ -523,7 +542,7 @@ ft2232_armusbocd_done( cable_t *cable )
static void
ft2232_clock_defer( cable_t *cable, int defer, int tms, int tdi, int n )
ft2232_clock_schedule( cable_t *cable, int tms, int tdi, int n )
{
params_t *params = (params_t *)cable->params;
@ -546,18 +565,17 @@ ft2232_clock_defer( cable_t *cable, int defer, int tms, int tdi, int n )
}
push_to_send( params, tdi | tms );
}
if (!defer) {
send_and_receive( cable );
params->last_tdo_valid = 0;
}
}
static void
ft2232_clock( cable_t *cable, int tms, int tdi, int n )
{
ft2232_clock_defer( cable, 0, tms, tdi, n );
params_t *params = (params_t *)cable->params;
ft2232_clock_schedule( cable, tms, tdi, n );
send_and_receive( cable );
params->last_tdo_valid = 0;
}
@ -596,10 +614,25 @@ ft2232_get_tdo( cable_t *cable )
}
static void
ft2232_set_trst_schedule( params_t *params, int trst )
{
push_to_send( params, SET_BITS_HIGH );
push_to_send( params,
trst == 0 ? params->high_byte_value_trst_active : params->high_byte_value_trst_inactive );
push_to_send( params, params->high_byte_dir );
}
static int
ft2232_set_trst( cable_t *cable, int trst )
{
return 1;
params_t *params = (params_t *)cable->params;
ft2232_set_trst_schedule( params, trst );
send_and_receive( cable );
params->last_tdo_valid = 0;
return trst;
}
@ -797,10 +830,10 @@ ft2232_flush( cable_t *cable, cable_flush_amount_t how_much )
switch (cable->todo.data[i].action) {
case CABLE_CLOCK:
ft2232_clock_defer( cable, 1,
cable->todo.data[i].arg.clock.tms,
cable->todo.data[i].arg.clock.tdi,
cable->todo.data[i].arg.clock.n );
ft2232_clock_schedule( cable,
cable->todo.data[i].arg.clock.tms,
cable->todo.data[i].arg.clock.tdi,
cable->todo.data[i].arg.clock.n );
last_tdo_valid_schedule = 0;
break;
@ -811,6 +844,11 @@ ft2232_flush( cable_t *cable, cable_flush_amount_t how_much )
}
break;
case CABLE_SET_TRST:
ft2232_set_trst_schedule( params, cable->todo.data[i].arg.value.trst );
last_tdo_valid_schedule = 0;
break;
case CABLE_TRANSFER:
ft2232_transfer_schedule( cable,
cable->todo.data[i].arg.transfer.len,
@ -849,6 +887,13 @@ ft2232_flush( cable_t *cable, cable_flush_amount_t how_much )
cable->done.data[m].arg.value.tdo = tdo;
break;
}
case CABLE_SET_TRST:
{
int m = cable_add_queue_item( cable, &(cable->done) );
cable->done.data[m].action = CABLE_SET_TRST;
cable->done.data[m].arg.value.trst = cable->done.data[j].arg.value.trst;
last_tdo_valid_finish = 0;
}
case CABLE_GET_TRST:
{
int m = cable_add_queue_item( cable, &(cable->done) );

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