FreeCalypso > hg > freecalypso-schem2
view venus/src/periph/loudspeaker.v @ 63:4a7db02ddd3e
buzzer circuit implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 01 Dec 2021 20:22:47 +0000 |
parents | 66d99b5be8a3 |
children |
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/* Loudspeaker circuit following Leonardo schematics */ module loudspeaker (GND, VBAT, Input_pos, Input_neg, GPIO_enable); input GND, VBAT; input Input_pos, Input_neg; input GPIO_enable; wire PA_in_pos, PA_in_neg; wire Out_pos, Out_neg; wire BYPASS; /* instantiate the audio PA */ pkg_TPA6203A1 apa (.BYPASS(BYPASS), .GND(GND), .In_neg(PA_in_neg), .In_pos(PA_in_pos), .SHUTDOWN(GPIO_enable), .VDD(VBAT), .Out_pos(Out_pos), .Out_neg(Out_neg) ); /* input resistors: the inversion is per Leonardo schematics */ resistor R33xA (Input_pos, PA_in_neg); resistor R33xB (Input_neg, PA_in_pos); /* feedback resistors */ resistor R331 (Out_neg, PA_in_pos); resistor R332 (Out_pos, PA_in_neg); /* bypass and supply decoupling caps */ capacitor C319 (BYPASS, GND); capacitor C330 (VBAT, GND); /* small output capacitors */ capacitor C331 (Out_neg, GND); capacitor C332 (Out_pos, GND); /* the speaker itself! */ header_2pin spkr_connector (Out_pos, Out_neg); /* pull-down on the GPIO control line */ resistor R338 (GPIO_enable, GND); endmodule