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annotate venus/src/periph/keypad.v @ 62:a1b55af7f04d

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clamping diode pair for the buzzer driving circuit
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 01 Dec 2021 19:26:29 +0000
parents 9de8e7a43160
children
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9de8e7a43160 keypad initial implementation
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1 /*
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2 * This Verilog module encapsulates the keypad of FC Venus.
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3 *
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4 * As currently implemented, KBC/KBR crosspoint choices correspond
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5 * to TI's D-Sample, but they can be freely changed by the PCB layout
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6 * engineer by editing this Verilog module and regenerating the netlist.
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7 */
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8
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9 module keypad (GND, KBC, KBR, PWON);
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10
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11 input GND;
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12 input [4:0] KBC;
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13 output [4:0] KBR;
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14 output PWON;
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15
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16 keyswitch_wrap S401 (KBC[3], KBR[0]); /* left soft key */
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17 keyswitch_wrap S402 (KBC[4], KBR[2]); /* navigation up */
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18 keyswitch_wrap S403 (KBC[3], KBR[2]); /* right soft key */
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19 keyswitch_wrap S404 (KBC[4], KBR[0]); /* navigation left */
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20 keyswitch_wrap S405 (KBC[4], KBR[4]); /* navigation center */
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21 keyswitch_wrap S406 (KBC[4], KBR[1]); /* navigation right */
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22 keyswitch_wrap S407 (KBC[0], KBR[0]); /* green CALL or SEND button */
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23 keyswitch_wrap S408 (KBC[4], KBR[3]); /* navigation down */
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24 keyswitch_wrap S410 (KBC[0], KBR[1]); /* 1 */
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25 keyswitch_wrap S411 (KBC[1], KBR[1]); /* 2 */
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26 keyswitch_wrap S412 (KBC[2], KBR[1]); /* 3 */
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27 keyswitch_wrap S413 (KBC[0], KBR[2]); /* 4 */
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28 keyswitch_wrap S414 (KBC[1], KBR[2]); /* 5 */
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29 keyswitch_wrap S415 (KBC[2], KBR[2]); /* 6 */
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30 keyswitch_wrap S416 (KBC[0], KBR[3]); /* 7 */
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31 keyswitch_wrap S417 (KBC[1], KBR[3]); /* 8 */
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32 keyswitch_wrap S418 (KBC[2], KBR[3]); /* 9 */
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33 keyswitch_wrap S419 (KBC[0], KBR[4]); /* * */
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34 keyswitch_wrap S420 (KBC[1], KBR[4]); /* 0 */
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35 keyswitch_wrap S421 (KBC[2], KBR[4]); /* # */
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36 keyswitch_wrap S422 (KBC[2], KBR[0]); /* volume up */
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37 keyswitch_wrap S423 (KBC[1], KBR[0]); /* volume down */
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38 keyswitch_wrap S424 (KBC[3], KBR[1]); /* right side button */
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39
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40 /* The button in the "red" position is special: it is PWON */
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41 keyswitch_wrap S409 (PWON, GND);
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42
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43 endmodule;