89 lines
3.2 KiB
C
89 lines
3.2 KiB
C
/*
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* Copyright (c) 2021 Zach White <skullydazed@gmail.com>
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* Copyright (c) 2007 Eberhard Fahle
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*
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* max7219.h - A library for controling Leds with a MAX7219/MAX7221
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* This permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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// Set defaults if they're not set
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#ifndef MAX7219_LOAD
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# define MAX7219_LOAD B0
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#endif
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#ifndef MAX7219_CONTROLLERS
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# define MAX7219_CONTROLLERS 4
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#endif
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#ifndef MAX7219_LED_INTENSITY
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# define MAX7219_LED_INTENSITY 1
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#endif
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#ifndef MAX7219_SCROLL_TIME
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# define MAX7219_SCROLL_TIME 100
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#endif
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#ifndef MAX7219_BUFFER_MULTIPLIER
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# define MAX7219_BUFFER_MULTIPLIER 24
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#endif
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#if !defined(MAX7219_LED_TEST) && !defined(MAX7219_LED_ITERATE) && !defined(MAX7219_LED_DANCE) && !defined(MAX7219_LED_FONTTEST) && !defined(MAX7219_LED_CLUEBOARD) && !defined(MAX7219_LED_KONAMI) && !defined(MAX7219_LED_QMK_POWERED) && !defined(MAX7219_DRAWING_TOY_MODE) && !defined(MAX7219_LED_CUSTOM)
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# define MAX7219_QMK_POWERED
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#endif
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// Configure our MAX7219's
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#define MAX_BYTES MAX7219_CONTROLLERS * 2
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#define LED_COUNT MAX7219_CONTROLLERS * 64
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#define MAX7219_BUFFER_SIZE MAX7219_CONTROLLERS*MAX7219_BUFFER_MULTIPLIER
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// Opcodes for the MAX7219
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#define OP_DECODEMODE 9
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#define OP_INTENSITY 10
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#define OP_SCANLIMIT 11
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#define OP_SHUTDOWN 12
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#define OP_DISPLAYTEST 15
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// Datastructures
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extern uint8_t max7219_led_a[8][MAX7219_BUFFER_SIZE];
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extern bool max7219_led_scrolling;
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// Functions
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void max7219_write(int device_num, volatile uint8_t opcode, volatile uint8_t data);
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void max7219_write_all(void);
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void max7219_write_frame(void);
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void max7219_clear_display(void);
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void max7219_display_test(int device_num, bool enabled);
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void max7219_init(void);
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void max7219_message_sign(uint8_t message[][6], size_t message_len);
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void max7219_message_sign_task(bool loop_message);
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void max7219_set_decode_mode(int device_num, int mode);
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void max7219_set_intensity(int device_num, int intensity);
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void max7219_set_led(int row, int column, bool state);
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void max7219_set_all_leds(uint8_t led_matrix[LED_COUNT]);
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void max7219_set_scan_limit(int device_num, int limit);
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void max7219_shutdown(int device_num, bool is_in_shutdown);
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