52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
/** library to communicate with a Maxim MAX7219 IC attached to a 8-digit 7-segment
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* @file
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* @author King Kévin <kingkevin@cuvoodoo.info>
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* @copyright SPDX-License-Identifier: GPL-3.0-or-later
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* @date 2017
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* @note peripherals used: GPIO @ref led_max7219_gpio, SPI @ref led_max7219_spi
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* @warning all calls are blocking
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*/
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#pragma once
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/** setup communication with MAX7219 IC
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* @param[in] displays number of displays in the chain
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*/
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void led_max7219_setup(uint8_t displays);
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/** do nothing (no operation)
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* @param[in] display display number in chain (0xff for all)
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* @note send it to the last display in the chain to clear the previous command from the chain
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*/
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void led_max7219_nop(uint8_t display);
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/** switch display on
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* @param[in] display display number in chain (0xff for all)
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*/
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void led_max7219_on(uint8_t display);
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/** switch display off
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* @param[in] display display number in chain (0xff for all)
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*/
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void led_max7219_off(uint8_t display);
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/** switch display in test or normal operation mode
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* @param[in] test switch in test mode (else normal operation)
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* @param[in] display display number in chain (0xff for all)
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*/
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void led_max7219_test(bool test, uint8_t display);
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/** set display intensity
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* @param[in] intensity level to set (0-15)
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* @param[in] digits number of digits to display (1-8)
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* @param[in] display display number in chain (0xff for all)
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*/
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void led_max7219_intensity(uint8_t intensity, uint8_t digits, uint8_t display);
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/** display text
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* @param[in] text text to display (8 characters)
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* @param[in] display display number in chain (0xff for all)
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* @note use first bit of each character to enable dot
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* @return false if string has unsupported characters
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*/
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bool led_max7219_text(char* text, uint8_t display);
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/** display number
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* @param[in] number number to display (8 digits max)
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* @param[in] dots set bit if dot on corresponding digit should be displayed
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* @param[in] display display number in chain (0xff for all)
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*/
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void led_max7219_number(uint32_t number, uint8_t dots, uint8_t display);
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