48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/* Copyright 2022
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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/**
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* Driver for 74x138 3-to-8 decoder/demultiplexer with inverting outputs
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* https://assets.nexperia.com/documents/data-sheet/74HC_HCT138.pdf
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*/
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/**
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* Initialize the address and output enable pins.
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*/
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void sn74x138_init(void);
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/**
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* Set the enabled state.
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*
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* When enabled is true, pulls the E1 and E2 pins low, and the E3 pin high.
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*
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* \param enabled The enable state to set.
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*/
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void sn74x138_set_enabled(bool enabled);
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/**
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* Set the output pin address.
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*
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* The selected output pin will be pulled low, while the remaining output pins will be high.
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*
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* \param address The address to set, from 0 to 7.
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*/
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void sn74x138_set_addr(uint8_t address);
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