diff options
author | Drashna Jael're <drashna@live.com> | 2022-05-29 15:38:33 -0700 |
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committer | Drashna Jael're <drashna@live.com> | 2022-05-29 15:38:33 -0700 |
commit | 30aac80d5a6d8c6f7c06efb49189d748e70edc4a (patch) | |
tree | ceb11968ae41228e4b110c07467cdca7cc9cff22 /drivers/gpio/sn74x154.h | |
parent | 67f4e5f34489abf986dedb4984b256692086c615 (diff) | |
parent | e22a183329fd05d39f88bb9dfebe98cfa7cd8402 (diff) |
Merge remote-tracking branch 'qmk 0.17.0' into firmware21
Diffstat (limited to 'drivers/gpio/sn74x154.h')
-rw-r--r-- | drivers/gpio/sn74x154.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/gpio/sn74x154.h b/drivers/gpio/sn74x154.h new file mode 100644 index 0000000000..ce6a9ddb0e --- /dev/null +++ b/drivers/gpio/sn74x154.h @@ -0,0 +1,48 @@ +/* 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 74x154 4-to-16 decoder/demultiplexer with inverting outputs + * https://assets.nexperia.com/documents/data-sheet/74HC_HCT154.pdf + */ + +/** + * Initialize the address and output enable pins. + */ +void sn74x154_init(void); + +/** + * Set the enabled state. + * + * When enabled is true, pulls the E0 and E1 pins low. + * + * \param enabled The enable state to set. + */ +void sn74x154_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 15. + */ +void sn74x154_set_addr(uint8_t address); |