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

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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/*
 * This Verilog module encapsulates the keypad of FC Venus.
 *
 * As currently implemented, KBC/KBR crosspoint choices correspond
 * to TI's D-Sample, but they can be freely changed by the PCB layout
 * engineer by editing this Verilog module and regenerating the netlist.
 */

module keypad (GND, KBC, KBR, PWON);

input GND;
input [4:0] KBC;
output [4:0] KBR;
output PWON;

keyswitch_wrap S401 (KBC[3], KBR[0]);	/* left soft key */
keyswitch_wrap S402 (KBC[4], KBR[2]);	/* navigation up */
keyswitch_wrap S403 (KBC[3], KBR[2]);	/* right soft key */
keyswitch_wrap S404 (KBC[4], KBR[0]);	/* navigation left */
keyswitch_wrap S405 (KBC[4], KBR[4]);	/* navigation center */
keyswitch_wrap S406 (KBC[4], KBR[1]);	/* navigation right */
keyswitch_wrap S407 (KBC[0], KBR[0]);	/* green CALL or SEND button */
keyswitch_wrap S408 (KBC[4], KBR[3]);	/* navigation down */
keyswitch_wrap S410 (KBC[0], KBR[1]);	/* 1 */
keyswitch_wrap S411 (KBC[1], KBR[1]);	/* 2 */
keyswitch_wrap S412 (KBC[2], KBR[1]);	/* 3 */
keyswitch_wrap S413 (KBC[0], KBR[2]);	/* 4 */
keyswitch_wrap S414 (KBC[1], KBR[2]);	/* 5 */
keyswitch_wrap S415 (KBC[2], KBR[2]);	/* 6 */
keyswitch_wrap S416 (KBC[0], KBR[3]);	/* 7 */
keyswitch_wrap S417 (KBC[1], KBR[3]);	/* 8 */
keyswitch_wrap S418 (KBC[2], KBR[3]);	/* 9 */
keyswitch_wrap S419 (KBC[0], KBR[4]);	/* * */
keyswitch_wrap S420 (KBC[1], KBR[4]);	/* 0 */
keyswitch_wrap S421 (KBC[2], KBR[4]);	/* # */
keyswitch_wrap S422 (KBC[2], KBR[0]);	/* volume up */
keyswitch_wrap S423 (KBC[1], KBR[0]);	/* volume down */
keyswitch_wrap S424 (KBC[3], KBR[1]);	/* right side button */

/* The button in the "red" position is special: it is PWON */
keyswitch_wrap S409 (PWON, GND);

endmodule;