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