307cad4a9a
new idf project (with idf.py create-project)
add 2 components for encoder and display:
https://github.com/DavidAntliff/esp32-rotary-encoder
https://github.com/UncleRus/esp-idf-lib/tree/master/components/max7219
add code for testing a 7 segment display
175 lines
4.9 KiB
C
175 lines
4.9 KiB
C
/*
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* Copyright (c) 2019 Ruslan V. Uss <unclerus@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of itscontributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file max7219.h
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* @defgroup max7219 max7219
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* @{
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*
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* ESP-IDF driver for MAX7219/MAX7221
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* Serially Interfaced, 8-Digit LED Display Drivers
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*
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* Ported from esp-open-rtos
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*
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* Copyright (c) 2017 Ruslan V. Uss <unclerus@gmail.com>
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*
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* BSD Licensed as described in the file LICENSE
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*/
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#ifndef __MAX7219_H__
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#define __MAX7219_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include <driver/spi_master.h>
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#include <driver/gpio.h> // add by nopnop2002
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#include <esp_err.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAX7219_MAX_CLOCK_SPEED_HZ (10000000) // 10 MHz
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#define MAX7219_MAX_CASCADE_SIZE 8
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#define MAX7219_MAX_BRIGHTNESS 15
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/**
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* Display descriptor
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*/
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typedef struct
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{
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spi_device_interface_config_t spi_cfg;
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spi_device_handle_t spi_dev;
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uint8_t digits; //!< Accessible digits in 7seg. Up to cascade_size * 8
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uint8_t cascade_size; //!< Up to `MAX7219_MAX_CASCADE_SIZE` MAX721xx cascaded
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bool mirrored; //!< true for horizontally mirrored displays
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bool bcd;
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} max7219_t;
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/**
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* @brief Initialize device descriptor
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*
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* @param dev Device descriptor
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* @param host SPI host
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* @param clock_speed_hz SPI clock speed, Hz
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* @param cs_pin CS GPIO number
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_init_desc(max7219_t *dev, spi_host_device_t host, uint32_t clock_speed_hz, gpio_num_t cs_pin);
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/**
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* @brief Free device descriptor
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*
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* @param dev Device descriptor
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_free_desc(max7219_t *dev);
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/**
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* @brief Initialize display
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*
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* Switch it to normal operation from shutdown mode,
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* set scan limit to the max and clear
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*
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* @param dev Display descriptor
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_init(max7219_t *dev);
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/**
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* @brief Set decode mode and clear display
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*
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* @param dev Display descriptor
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* @param bcd true to set BCD decode mode, false to normal
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_set_decode_mode(max7219_t *dev, bool bcd);
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/**
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* @brief Set display brightness
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*
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* @param dev Display descriptor
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* @param value Brightness value, 0..MAX7219_MAX_BRIGHTNESS
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_set_brightness(max7219_t *dev, uint8_t value);
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/**
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* @brief Shutdown display or set it to normal mode
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*
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* @param dev Display descriptor
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* @param shutdown Shutdown display if true
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_set_shutdown_mode(max7219_t *dev, bool shutdown);
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/**
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* @brief Write data to display digit
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*
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* @param dev Display descriptor
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* @param digit Digit index, 0..dev->digits - 1
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* @param val Data
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_set_digit(max7219_t *dev, uint8_t digit, uint8_t val);
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/**
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* @brief Clear display
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*
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* @param dev Display descriptor
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_clear(max7219_t *dev);
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/**
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* @brief Draw text on 7-segment display
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*
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* @param dev Display descriptor
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* @param pos Start digit
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* @param s Text
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_draw_text_7seg(max7219_t *dev, uint8_t pos, const char *s);
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/**
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* @brief Draw 64-bit image on 8x8 matrix
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*
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* @param dev Display descriptor
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* @param pos Start digit
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* @param image 64-bit buffer with image data
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* @return `ESP_OK` on success
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*/
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esp_err_t max7219_draw_image_8x8(max7219_t *dev, uint8_t pos, const void *image);
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#ifdef __cplusplus
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}
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#endif
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/**@}*/
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#endif /* __MAX7219_H__ */
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