Digilent Port Communications - Manual (Page 8)

Digilent, Inc TM
DPCUTIL Programmer’s Manual
www.digilentinc.com
© Digilent, Inc. Page 8 of 14
rgbSend[0]
TDI 8 TDI 7 TDI 6 TDI 5 TDI 4 TDI 3 TDI 2 TDI 1
rgbSend[1]
TDI 16 TDI 15 TDI 14 TDI 13 TDI 12 TDI 11 TDI 10 TDI 9
perc - pointer to store
error code
ptrid
- pointer to store
transaction ID. If ptrid is NULL, this
function will be
blocking.
Return Values
Returns true if successful. Returns
false otherwise.
Description
Disables driving of JTAG signals. Must
be called before FCloseJtag is called.
BOOL DpcSetTmsTdiTck(HANDLE hif, BOOL
fTms, BOOL fTdi, BOOL fTck, ERC * perc,
TRID * ptrid)
Parameters
hif
- handle to JTAG
interface
fTms
- value of TMS pin
(true = 1, false = 0)
fTdi
- value of TDI pin
(true = 1, false = 0)
fTck
- value of TCK pin
(true = 1, false = 0)
perc
- pointer to store
error code
ptrid
- pointer to store
transaction ID. If ptrid is NULL, this
function will be
blocking.
Return Values
Returns true if successful. Returns
false otherwise.
Description
Sets the JTAG lines TMS, TDI, and
TCK to a specified state.
BOOL DpcPutTdiBits(HANDLE hif, int cbit,
BYTE * rgbSnd, BOOL bitTms, BOOL
fReturnTdo,
BYTE * rgbRcv, ERC * perc, TRID * ptrid)
Parameters
hif
- handle to JTAG
interface
cbit
- number of TDI
bits to clock into the JTAG TAP
controller
rgbSnd
- buffer that holds
TDI values. Bits are shifted in
sequentially starting at the first element
in the BYTE array, from LSB to MSB.
bitTms
- value the TMS
pin will be held at while the rgbSnd bits
are shifted in (true = 1, false = 0)
fReturnTdo
- specifies if bits
from TDO should be returned
rgbRcv
- (optional) holds
TDO bits. Only used if fReturnTdo is
true.
perc
- pointer to store
error code
ptrid
- pointer to store
transaction ID. If ptrid is NULL, this
function will be
blocking.
Return Values
Returns true if successful. Returns
false otherwise.
Description
Shifts a specified number of bits into
TDI and (optionally) returns bits shifted
out TDO. RgbSend holds TDI bits.
Each bit is shifted in sequentially,
starting at the first element in the array,
from least significant bit to most
significant bit Below is an example of
how the TDI bits are placed in each
byte of rgbSend.