62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
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Copyright 2022, Savanni D'Gerinel <savanni@luminescent-dreams.com>
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This file is part of Savanni's AVR library.
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Lumeto 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 3 of the License, or (at your option) any later version.
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Lumeto 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.
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You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <display.h>
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#include <util/delay.h>
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#include <base.h>
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void display_strobe_line(gpio_t *line) {
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set_line(line);
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_delay_us(100);
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clear_line(line);
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_delay_us(100);
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}
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void write_instruction(display_t *disp, uint8_t bitcode) {
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clear_line(&disp->register_select);
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sr_send_msb(&disp->reg, bitcode);
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_delay_ms(1);
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display_strobe_line(&disp->enable);
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}
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void write_char(display_t *disp, uint8_t bitcode) {
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set_line(&disp->register_select);
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sr_send_msb(&disp->reg, bitcode);
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_delay_ms(1);
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display_strobe_line(&disp->enable);
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}
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void display_init(display_t *disp) {
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sr_initialize(&disp->reg);
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set_line_direction(&disp->register_select, LINE_OUT);
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set_line_direction(&disp->enable, LINE_OUT);
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write_instruction(disp, 0b00111100);
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}
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void display_clear(display_t *disp) {
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write_instruction(disp, 0x01);
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write_instruction(disp, 0x02);
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}
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void display_enable(display_t *disp) {
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write_instruction(disp, 0x0e);
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}
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void display_write_message(display_t *disp, const char *msg) {
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for (size_t i = 0; msg[i] != 0; i++) {
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write_char(disp, msg[i]);
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}
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}
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