kopia lustrzana https://github.com/espressif/esp-idf
241 wiersze
8.4 KiB
C
241 wiersze
8.4 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdlib.h>
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#include <sys/cdefs.h>
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#include "sdkconfig.h"
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#if CONFIG_LCD_ENABLE_DEBUG_LOG
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// The local log level must be defined before including esp_log.h
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// Set the maximum log level for this source file
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#define LOG_LOCAL_LEVEL ESP_LOG_DEBUG
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#endif
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_lcd_panel_interface.h"
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#include "esp_lcd_panel_io.h"
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#include "esp_lcd_panel_vendor.h"
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#include "esp_lcd_panel_ops.h"
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#include "driver/gpio.h"
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#include "esp_log.h"
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#include "esp_check.h"
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static const char *TAG = "lcd_panel.ssd1306";
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// SSD1306 commands
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#define SSD1306_CMD_SET_MEMORY_ADDR_MODE 0x20
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#define SSD1306_CMD_SET_COLUMN_RANGE 0x21
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#define SSD1306_CMD_SET_PAGE_RANGE 0x22
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#define SSD1306_CMD_SET_CHARGE_PUMP 0x8D
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#define SSD1306_CMD_MIRROR_X_OFF 0xA0
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#define SSD1306_CMD_MIRROR_X_ON 0xA1
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#define SSD1306_CMD_INVERT_OFF 0xA6
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#define SSD1306_CMD_INVERT_ON 0xA7
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#define SSD1306_CMD_DISP_OFF 0xAE
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#define SSD1306_CMD_DISP_ON 0xAF
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#define SSD1306_CMD_MIRROR_Y_OFF 0xC0
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#define SSD1306_CMD_MIRROR_Y_ON 0xC8
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static esp_err_t panel_ssd1306_del(esp_lcd_panel_t *panel);
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static esp_err_t panel_ssd1306_reset(esp_lcd_panel_t *panel);
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static esp_err_t panel_ssd1306_init(esp_lcd_panel_t *panel);
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static esp_err_t panel_ssd1306_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data);
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static esp_err_t panel_ssd1306_invert_color(esp_lcd_panel_t *panel, bool invert_color_data);
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static esp_err_t panel_ssd1306_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y);
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static esp_err_t panel_ssd1306_swap_xy(esp_lcd_panel_t *panel, bool swap_axes);
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static esp_err_t panel_ssd1306_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap);
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static esp_err_t panel_ssd1306_disp_on_off(esp_lcd_panel_t *panel, bool off);
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typedef struct {
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esp_lcd_panel_t base;
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esp_lcd_panel_io_handle_t io;
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int reset_gpio_num;
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bool reset_level;
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int x_gap;
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int y_gap;
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unsigned int bits_per_pixel;
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} ssd1306_panel_t;
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esp_err_t esp_lcd_new_panel_ssd1306(const esp_lcd_panel_io_handle_t io, const esp_lcd_panel_dev_config_t *panel_dev_config, esp_lcd_panel_handle_t *ret_panel)
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{
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#if CONFIG_LCD_ENABLE_DEBUG_LOG
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esp_log_level_set(TAG, ESP_LOG_DEBUG);
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#endif
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esp_err_t ret = ESP_OK;
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ssd1306_panel_t *ssd1306 = NULL;
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ESP_GOTO_ON_FALSE(io && panel_dev_config && ret_panel, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
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ESP_GOTO_ON_FALSE(panel_dev_config->bits_per_pixel == 1, ESP_ERR_INVALID_ARG, err, TAG, "bpp must be 1");
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ssd1306 = calloc(1, sizeof(ssd1306_panel_t));
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ESP_GOTO_ON_FALSE(ssd1306, ESP_ERR_NO_MEM, err, TAG, "no mem for ssd1306 panel");
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if (panel_dev_config->reset_gpio_num >= 0) {
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gpio_config_t io_conf = {
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.mode = GPIO_MODE_OUTPUT,
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.pin_bit_mask = 1ULL << panel_dev_config->reset_gpio_num,
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};
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ESP_GOTO_ON_ERROR(gpio_config(&io_conf), err, TAG, "configure GPIO for RST line failed");
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}
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ssd1306->io = io;
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ssd1306->bits_per_pixel = panel_dev_config->bits_per_pixel;
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ssd1306->reset_gpio_num = panel_dev_config->reset_gpio_num;
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ssd1306->reset_level = panel_dev_config->flags.reset_active_high;
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ssd1306->base.del = panel_ssd1306_del;
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ssd1306->base.reset = panel_ssd1306_reset;
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ssd1306->base.init = panel_ssd1306_init;
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ssd1306->base.draw_bitmap = panel_ssd1306_draw_bitmap;
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ssd1306->base.invert_color = panel_ssd1306_invert_color;
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ssd1306->base.set_gap = panel_ssd1306_set_gap;
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ssd1306->base.mirror = panel_ssd1306_mirror;
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ssd1306->base.swap_xy = panel_ssd1306_swap_xy;
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ssd1306->base.disp_on_off = panel_ssd1306_disp_on_off;
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*ret_panel = &(ssd1306->base);
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ESP_LOGD(TAG, "new ssd1306 panel @%p", ssd1306);
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return ESP_OK;
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err:
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if (ssd1306) {
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if (panel_dev_config->reset_gpio_num >= 0) {
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gpio_reset_pin(panel_dev_config->reset_gpio_num);
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}
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free(ssd1306);
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}
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return ret;
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}
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static esp_err_t panel_ssd1306_del(esp_lcd_panel_t *panel)
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{
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ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
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if (ssd1306->reset_gpio_num >= 0) {
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gpio_reset_pin(ssd1306->reset_gpio_num);
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}
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ESP_LOGD(TAG, "del ssd1306 panel @%p", ssd1306);
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free(ssd1306);
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return ESP_OK;
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}
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static esp_err_t panel_ssd1306_reset(esp_lcd_panel_t *panel)
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{
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ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
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// perform hardware reset
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if (ssd1306->reset_gpio_num >= 0) {
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gpio_set_level(ssd1306->reset_gpio_num, ssd1306->reset_level);
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vTaskDelay(pdMS_TO_TICKS(10));
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gpio_set_level(ssd1306->reset_gpio_num, !ssd1306->reset_level);
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vTaskDelay(pdMS_TO_TICKS(10));
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}
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return ESP_OK;
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}
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static esp_err_t panel_ssd1306_init(esp_lcd_panel_t *panel)
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{
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ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
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esp_lcd_panel_io_handle_t io = ssd1306->io;
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esp_lcd_panel_io_tx_param(io, SSD1306_CMD_DISP_OFF, NULL, 0);
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esp_lcd_panel_io_tx_param(io, SSD1306_CMD_SET_MEMORY_ADDR_MODE, (uint8_t[]) {
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0x00 // horizontal addressing mode
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}, 1);
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esp_lcd_panel_io_tx_param(io, SSD1306_CMD_SET_CHARGE_PUMP, (uint8_t[]) {
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0x14 // enable charge pump
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}, 1);
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return ESP_OK;
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}
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static esp_err_t panel_ssd1306_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data)
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{
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ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
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assert((x_start < x_end) && (y_start < y_end) && "start position must be smaller than end position");
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esp_lcd_panel_io_handle_t io = ssd1306->io;
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// adding extra gap
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x_start += ssd1306->x_gap;
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x_end += ssd1306->x_gap;
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y_start += ssd1306->y_gap;
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y_end += ssd1306->y_gap;
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// one page contains 8 rows (COMs)
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uint8_t page_start = y_start / 8;
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uint8_t page_end = (y_end - 1) / 8;
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// define an area of frame memory where MCU can access
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esp_lcd_panel_io_tx_param(io, SSD1306_CMD_SET_COLUMN_RANGE, (uint8_t[]) {
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(x_start & 0x7F),
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((x_end - 1) & 0x7F),
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}, 2);
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esp_lcd_panel_io_tx_param(io, SSD1306_CMD_SET_PAGE_RANGE, (uint8_t[]) {
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(page_start & 0x07),
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(page_end & 0x07),
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}, 2);
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// transfer frame buffer
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size_t len = (y_end - y_start) * (x_end - x_start) * ssd1306->bits_per_pixel / 8;
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esp_lcd_panel_io_tx_color(io, -1, color_data, len);
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return ESP_OK;
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}
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static esp_err_t panel_ssd1306_invert_color(esp_lcd_panel_t *panel, bool invert_color_data)
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{
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ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
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esp_lcd_panel_io_handle_t io = ssd1306->io;
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int command = 0;
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if (invert_color_data) {
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command = SSD1306_CMD_INVERT_ON;
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} else {
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command = SSD1306_CMD_INVERT_OFF;
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}
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esp_lcd_panel_io_tx_param(io, command, NULL, 0);
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return ESP_OK;
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}
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static esp_err_t panel_ssd1306_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y)
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{
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ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
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esp_lcd_panel_io_handle_t io = ssd1306->io;
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int command = 0;
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if (mirror_x) {
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command = SSD1306_CMD_MIRROR_X_ON;
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} else {
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command = SSD1306_CMD_MIRROR_X_OFF;
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}
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esp_lcd_panel_io_tx_param(io, command, NULL, 0);
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if (mirror_y) {
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command = SSD1306_CMD_MIRROR_Y_ON;
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} else {
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command = SSD1306_CMD_MIRROR_X_OFF;
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}
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esp_lcd_panel_io_tx_param(io, command, NULL, 0);
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return ESP_OK;
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}
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static esp_err_t panel_ssd1306_swap_xy(esp_lcd_panel_t *panel, bool swap_axes)
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{
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return ESP_ERR_NOT_SUPPORTED;
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}
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static esp_err_t panel_ssd1306_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap)
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{
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ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
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ssd1306->x_gap = x_gap;
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ssd1306->y_gap = y_gap;
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return ESP_OK;
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}
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static esp_err_t panel_ssd1306_disp_on_off(esp_lcd_panel_t *panel, bool on_off)
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{
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ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
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esp_lcd_panel_io_handle_t io = ssd1306->io;
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int command = 0;
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if (on_off) {
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command = SSD1306_CMD_DISP_ON;
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} else {
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command = SSD1306_CMD_DISP_OFF;
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}
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esp_lcd_panel_io_tx_param(io, command, NULL, 0);
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// SEG/COM will be ON/OFF after 100ms after sending DISP_ON/OFF command
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vTaskDelay(pdMS_TO_TICKS(100));
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return ESP_OK;
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}
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