FreeCalypso > hg > freecalypso-schem2

comparison venus/src/periph/loudspeaker.v @ 59:66d99b5be8a3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
loudspeaker block implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 01 Dec 2021 04:08:35 +0000
parents
children
comparison
equal deleted inserted replaced
58:229f0b2dd1bf 59:66d99b5be8a3
1 /* Loudspeaker circuit following Leonardo schematics */
2
3 module loudspeaker (GND, VBAT, Input_pos, Input_neg, GPIO_enable);
4
5 input GND, VBAT;
6 input Input_pos, Input_neg;
7 input GPIO_enable;
8
9 wire PA_in_pos, PA_in_neg;
10 wire Out_pos, Out_neg;
11 wire BYPASS;
12
13 /* instantiate the audio PA */
14 pkg_TPA6203A1 apa (.BYPASS(BYPASS),
15 .GND(GND),
16 .In_neg(PA_in_neg),
17 .In_pos(PA_in_pos),
18 .SHUTDOWN(GPIO_enable),
19 .VDD(VBAT),
20 .Out_pos(Out_pos),
21 .Out_neg(Out_neg)
22 );
23
24 /* input resistors: the inversion is per Leonardo schematics */
25 resistor R33xA (Input_pos, PA_in_neg);
26 resistor R33xB (Input_neg, PA_in_pos);
27
28 /* feedback resistors */
29 resistor R331 (Out_neg, PA_in_pos);
30 resistor R332 (Out_pos, PA_in_neg);
31
32 /* bypass and supply decoupling caps */
33 capacitor C319 (BYPASS, GND);
34 capacitor C330 (VBAT, GND);
35
36 /* small output capacitors */
37 capacitor C331 (Out_neg, GND);
38 capacitor C332 (Out_pos, GND);
39
40 /* the speaker itself! */
41 header_2pin spkr_connector (Out_pos, Out_neg);
42
43 /* pull-down on the GPIO control line */
44 resistor R338 (GPIO_enable, GND);
45
46 endmodule