XESS XStend, Руководство пользователя

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028- // contents of the master are loaded into the slave on the rising
029- // edge of the clock.
030- MASTER.CLK = !KB_CLK;
031- MASTER := [KB_DATA,SLAVE9..SLAVE1];
032- SLAVE.CLK = KB_CLK;
033- SLAVE := MASTER;
034-
035- // Show the bit string for the scan code. Ignore the upper two
036- // bits because these are the parity bit and the stop bit.
037- D_ = ![SLAVE7..SLAVE0];
038-
039- // If one of the '0'-'9' keys is pressed, display the digit on the
040- // right LED display of the XStend Board.
041- TRUTH_TABLE ([SLAVE7..SLAVE0]
-> [RS_6..RS_0])
042- ^H16 -> ^B1101101;
043- ^H1E -> ^B0100010;
044- ^H26 -> ^B0100100;
045- ^H25 -> ^B1000101;
046- ^H2E -> ^B0010100;
047- ^H36 -> ^B0010000;
048- ^H3D -> ^B0101101;
049- ^H3E -> ^B0000000;
050- ^H46 -> ^B0000100;
051- ^H45 -> ^B0001000;
052-
053- END EXP3
Listing 20: UCF file for PS/2 XStend example with XS40.
001- # MICROCONTROLLER PINS
002- NET RST
LOC=P36; # ACTIVE-HIGH RESET
003- #
004- # XS40 BOARD RAM CONTROL PINS
005- NET OE_
LOC=P61; # ACTIVE-LOW OUTPUT ENABLE
006- #
007- #
008- # XSTEND BOARD CONNECTIONS
009- #
010- # PS/2 KEYBOARD CONNECTIONS
011- NET KB_DATA
LOC=P69;
012- NET KB_CLK LOC=P68;
013- #
014- # RIGHT LED DIGIT SEGMENT CONNECTIONS (ACTIVE-LOW)
015- NET RS_0
LOC=P59;
016- NET RS_1 LOC=P57;
017- NET RS_2 LOC=P51;
018- NET RS_3 LOC=P56;
019- NET RS_4 LOC=P50;
020- NET RS_5 LOC=P58;
021- NET RS_6 LOC=P60;
022- #
023- # INDIVIDUAL LED CONNECTIONS (ACTIVE-LOW)
024- NET D_1
LOC=P41;
025- NET D_2 LOC=P40;
026- NET D_3 LOC=P39;
027- NET D_4 LOC=P38;
028- NET D_5 LOC=P35;
029- NET D_6 LOC=P81;