322 lines
11 KiB
C
322 lines
11 KiB
C
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// Copyright 2020 Espressif Systems (Shanghai) Co. Ltd.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdio.h>
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_log.h"
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#include "driver/gpio.h"
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#include "screen_driver.h"
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#include "screen_utility.h"
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#include "st7796.h"
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static const char *TAG = "lcd st7796";
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#define LCD_CHECK(a, str, ret) if(!(a)) { \
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ESP_LOGE(TAG,"%s:%d (%s):%s", __FILE__, __LINE__, __FUNCTION__, str); \
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return (ret); \
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}
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#define LCD_NAME "ST7796"
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#define LCD_BPP 16
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#define ST7796_RESOLUTION_HOR 320
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#define ST7796_RESOLUTION_VER 480
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/** commands of ST7796 */
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#define LCD_SWRESET 0x01 // Software Reset
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#define LCD_RDDID 0x04 // Read Display ID
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#define LCD_INVOFF 0x20 // Display Inversion Off
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#define LCD_INVON 0x21 // Display Inversion On
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#define LCD_CASET 0x2A // Column Address Set
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#define LCD_PASET 0x2B // Row Address Set
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#define LCD_RAMWR 0x2C // Memory Writ
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#define LCD_RAMRD 0x2E // Memory Read
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#define LCD_MADCTL 0x36 // Memory Data Access Control
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/* MADCTL Defines */
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#define MADCTL_MY 0x80
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#define MADCTL_MX 0x40
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#define MADCTL_MV 0x20
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#define MADCTL_ML 0x10
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#define MADCTL_RGB 0x08
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#define MADCTL_MH 0x04
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static scr_handle_t g_lcd_handle;
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/**
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* This header file is only used to redefine the function to facilitate the call.
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* It can only be placed in this position, not in the head of the file.
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*/
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#include "interface_drv_def.h"
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scr_driver_t lcd_st7796_default_driver = {
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.init = lcd_st7796_init,
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.deinit = lcd_st7796_deinit,
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.set_direction = lcd_st7796_set_rotation,
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.set_window = lcd_st7796_set_window,
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.write_ram_data = lcd_st7796_write_ram_data,
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.draw_pixel = lcd_st7796_draw_pixel,
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.draw_bitmap = lcd_st7796_draw_bitmap,
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.get_info = lcd_st7796_get_info,
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};
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static esp_err_t lcd_st7796_reg_config(void);
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esp_err_t lcd_st7796_init(const scr_controller_config_t *lcd_conf)
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{
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LCD_CHECK(lcd_conf->width <= ST7796_RESOLUTION_HOR, "Width greater than maximum", ESP_ERR_INVALID_ARG);
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LCD_CHECK(lcd_conf->height <= ST7796_RESOLUTION_VER, "Height greater than maximum", ESP_ERR_INVALID_ARG);
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LCD_CHECK(NULL != lcd_conf, "config pointer invalid", ESP_ERR_INVALID_ARG);
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LCD_CHECK((NULL != lcd_conf->interface_drv->write_cmd && \
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NULL != lcd_conf->interface_drv->write_data && \
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NULL != lcd_conf->interface_drv->write && \
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NULL != lcd_conf->interface_drv->read && \
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NULL != lcd_conf->interface_drv->bus_acquire && \
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NULL != lcd_conf->interface_drv->bus_release),
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"Interface driver invalid", ESP_ERR_INVALID_ARG);
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esp_err_t ret;
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// Reset the display
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if (lcd_conf->pin_num_rst >= 0) {
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gpio_pad_select_gpio(lcd_conf->pin_num_rst);
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gpio_set_direction(lcd_conf->pin_num_rst, GPIO_MODE_OUTPUT);
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gpio_set_level(lcd_conf->pin_num_rst, (lcd_conf->rst_active_level) & 0x1);
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vTaskDelay(100 / portTICK_RATE_MS);
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gpio_set_level(lcd_conf->pin_num_rst, (~(lcd_conf->rst_active_level)) & 0x1);
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vTaskDelay(100 / portTICK_RATE_MS);
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}
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g_lcd_handle.interface_drv = lcd_conf->interface_drv;
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g_lcd_handle.original_width = lcd_conf->width;
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g_lcd_handle.original_height = lcd_conf->height;
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g_lcd_handle.offset_hor = lcd_conf->offset_hor;
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g_lcd_handle.offset_ver = lcd_conf->offset_ver;
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// Send all the commands
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ret = lcd_st7796_reg_config();
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LCD_CHECK(ESP_OK == ret, "Write lcd register encounter error", ESP_FAIL);
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// Enable backlight
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if (lcd_conf->pin_num_bckl >= 0) {
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gpio_pad_select_gpio(lcd_conf->pin_num_bckl);
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gpio_set_direction(lcd_conf->pin_num_bckl, GPIO_MODE_OUTPUT);
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gpio_set_level(lcd_conf->pin_num_bckl, (lcd_conf->bckl_active_level) & 0x1);
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}
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ret = lcd_st7796_set_rotation(lcd_conf->rotate);
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LCD_CHECK(ESP_OK == ret, "Set rotate failed", ESP_FAIL);
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lcd_st7796_set_invert(false);
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return ESP_OK;
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}
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esp_err_t lcd_st7796_deinit(void)
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{
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memset(&g_lcd_handle, 0, sizeof(scr_handle_t));
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return ESP_OK;
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}
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esp_err_t lcd_st7796_set_rotation(scr_dir_t dir)
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{
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esp_err_t ret;
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uint8_t reg_data = 0;
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reg_data |= MADCTL_RGB;
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if (SCR_DIR_MAX < dir) {
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dir >>= 5;
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}
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LCD_CHECK(dir < 8, "Unsupport rotate direction", ESP_ERR_INVALID_ARG);
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switch (dir) {
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case SCR_DIR_LRTB:
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g_lcd_handle.width = g_lcd_handle.original_width;
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g_lcd_handle.height = g_lcd_handle.original_height;
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break;
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case SCR_DIR_LRBT:
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reg_data |= MADCTL_MY;
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g_lcd_handle.width = g_lcd_handle.original_width;
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g_lcd_handle.height = g_lcd_handle.original_height;
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break;
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case SCR_DIR_RLTB:
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reg_data |= MADCTL_MX;
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g_lcd_handle.width = g_lcd_handle.original_width;
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g_lcd_handle.height = g_lcd_handle.original_height;
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break;
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case SCR_DIR_RLBT:
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reg_data |= MADCTL_MX | MADCTL_MY;
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g_lcd_handle.width = g_lcd_handle.original_width;
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g_lcd_handle.height = g_lcd_handle.original_height;
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break;
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case SCR_DIR_TBLR:
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reg_data |= MADCTL_MV;
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g_lcd_handle.width = g_lcd_handle.original_height;
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g_lcd_handle.height = g_lcd_handle.original_width;
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break;
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case SCR_DIR_BTLR:
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reg_data |= MADCTL_MY | MADCTL_MV;
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g_lcd_handle.width = g_lcd_handle.original_height;
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g_lcd_handle.height = g_lcd_handle.original_width;
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break;
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case SCR_DIR_TBRL:
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reg_data |= MADCTL_MX | MADCTL_MV;
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g_lcd_handle.width = g_lcd_handle.original_height;
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g_lcd_handle.height = g_lcd_handle.original_width;
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break;
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case SCR_DIR_BTRL:
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reg_data |= MADCTL_MX | MADCTL_MY | MADCTL_MV;
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g_lcd_handle.width = g_lcd_handle.original_height;
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g_lcd_handle.height = g_lcd_handle.original_width;
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break;
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default: break;
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}
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ESP_LOGI(TAG, "MADCTL=%x", reg_data);
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ret = LCD_WRITE_REG(LCD_MADCTL, reg_data);
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LCD_CHECK(ESP_OK == ret, "Set screen rotate failed", ESP_FAIL);
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g_lcd_handle.dir = dir;
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return ESP_OK;
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}
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esp_err_t lcd_st7796_get_info(scr_info_t *info)
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{
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LCD_CHECK(NULL != info, "info pointer invalid", ESP_ERR_INVALID_ARG);
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info->width = g_lcd_handle.width;
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info->height = g_lcd_handle.height;
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info->dir = g_lcd_handle.dir;
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info->name = LCD_NAME;
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info->color_type = SCR_COLOR_TYPE_RGB565;
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info->bpp = LCD_BPP;
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return ESP_OK;
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}
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esp_err_t lcd_st7796_set_window(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
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{
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LCD_CHECK((x1 < g_lcd_handle.width) && (y1 < g_lcd_handle.height), "The set coordinates exceed the screen size", ESP_ERR_INVALID_ARG);
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LCD_CHECK((x0 <= x1) && (y0 <= y1), "Window coordinates invalid", ESP_ERR_INVALID_ARG);
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esp_err_t ret = ESP_OK;
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scr_utility_apply_offset(&g_lcd_handle, ST7796_RESOLUTION_HOR, ST7796_RESOLUTION_VER, &x0, &y0, &x1, &y1);
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ret |= LCD_WRITE_CMD(LCD_CASET);
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ret |= LCD_WRITE_DATA(x0 >> 8);
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ret |= LCD_WRITE_DATA(x0 & 0xff);
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ret |= LCD_WRITE_DATA(x1 >> 8);
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ret |= LCD_WRITE_DATA(x1 & 0xff);
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ret |= LCD_WRITE_CMD(LCD_PASET);
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ret |= LCD_WRITE_DATA(y0 >> 8);
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ret |= LCD_WRITE_DATA(y0 & 0xff);
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ret |= LCD_WRITE_DATA(y1 >> 8);
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ret |= LCD_WRITE_DATA(y1 & 0xff);
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ret |= LCD_WRITE_CMD(LCD_RAMWR);
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LCD_CHECK(ESP_OK == ret, "Set window failed", ESP_FAIL);
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return ESP_OK;
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}
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esp_err_t lcd_st7796_write_ram_data(uint16_t color)
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{
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static uint8_t data[2];
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data[0] = (uint8_t)(color & 0xff);
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data[1] = (uint8_t)(color >> 8);
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return LCD_WRITE(data, 2);
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}
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esp_err_t lcd_st7796_set_invert(bool is_invert)
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{
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return LCD_WRITE_CMD(is_invert ? LCD_INVON : LCD_INVOFF);
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}
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esp_err_t lcd_st7796_draw_pixel(uint16_t x, uint16_t y, uint16_t color)
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{
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esp_err_t ret;
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ret = lcd_st7796_set_window(x, y, x, y);
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if (ESP_OK != ret) {
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return ESP_FAIL;
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}
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return lcd_st7796_write_ram_data(color);
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}
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esp_err_t lcd_st7796_draw_bitmap(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t *bitmap)
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{
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esp_err_t ret;
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LCD_CHECK(NULL != bitmap, "bitmap pointer invalid", ESP_ERR_INVALID_ARG);
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LCD_IFACE_ACQUIRE();
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ret = lcd_st7796_set_window(x, y, x + w - 1, y + h - 1);
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if (ESP_OK != ret) {
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return ESP_FAIL;
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}
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uint32_t len = w * h;
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ret = LCD_WRITE((uint8_t *)bitmap, 2 * len);
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LCD_IFACE_RELEASE();
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LCD_CHECK(ESP_OK == ret, "lcd write ram data failed", ESP_FAIL);
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return ESP_OK;
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}
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static esp_err_t lcd_st7796_reg_config(void)
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{
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LCD_WRITE_CMD(0x11); //Sleep Out
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vTaskDelay(pdMS_TO_TICKS(100));
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LCD_WRITE_CMD(0xf0);
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LCD_WRITE_DATA(0xc3); //enable command 2 part 1
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LCD_WRITE_CMD(0xf0);
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LCD_WRITE_DATA(0x96); //enable command 2 part 2
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LCD_WRITE_CMD(0x36); //内存数据访问控制
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LCD_WRITE_DATA(0x28);
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LCD_WRITE_CMD(0x3a); //16bit pixel
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LCD_WRITE_DATA(0x55);
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LCD_WRITE_CMD(0xb4);
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LCD_WRITE_DATA(0x01);
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LCD_WRITE_CMD(0xb7); LCD_WRITE_DATA(0xc6);
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LCD_WRITE_CMD(0xe8); LCD_WRITE_DATA(0x40);
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LCD_WRITE_DATA(0x8a); LCD_WRITE_DATA(0x00);
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LCD_WRITE_DATA(0x00); LCD_WRITE_DATA(0x29);
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LCD_WRITE_DATA(0x19); LCD_WRITE_DATA(0xa5);
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LCD_WRITE_DATA(0x33);
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LCD_WRITE_CMD(0xc1); LCD_WRITE_DATA(0x06);
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LCD_WRITE_CMD(0xc2); LCD_WRITE_DATA(0xa7);
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LCD_WRITE_CMD(0xc5); LCD_WRITE_DATA(0x18);
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LCD_WRITE_CMD(0xe0); LCD_WRITE_DATA(0xf0);
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LCD_WRITE_DATA(0x09); LCD_WRITE_DATA(0x0b);
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LCD_WRITE_DATA(0x06); LCD_WRITE_DATA(0x04);
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LCD_WRITE_DATA(0x15); LCD_WRITE_DATA(0x2f);
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LCD_WRITE_DATA(0x54); LCD_WRITE_DATA(0x42);
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LCD_WRITE_DATA(0x3c); LCD_WRITE_DATA(0x17);
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LCD_WRITE_DATA(0x14); LCD_WRITE_DATA(0x18);
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LCD_WRITE_DATA(0x1b);
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//Negative Voltage Gamma Coltrol
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LCD_WRITE_CMD(0xe1); LCD_WRITE_DATA(0xf0);
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LCD_WRITE_DATA(0x09); LCD_WRITE_DATA(0x0b);
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LCD_WRITE_DATA(0x06); LCD_WRITE_DATA(0x04);
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LCD_WRITE_DATA(0x03); LCD_WRITE_DATA(0x2d);
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LCD_WRITE_DATA(0x43); LCD_WRITE_DATA(0x42);
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LCD_WRITE_DATA(0x3b); LCD_WRITE_DATA(0x16);
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LCD_WRITE_DATA(0x14); LCD_WRITE_DATA(0x17);
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LCD_WRITE_DATA(0x1b);
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LCD_WRITE_CMD(0xf0); LCD_WRITE_DATA(0x3c);
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|
|
LCD_WRITE_CMD(0xf0); LCD_WRITE_DATA(0x69);
|
||
|
|
vTaskDelay(pdMS_TO_TICKS(10));
|
||
|
|
LCD_WRITE_CMD(0x29); //Display ON
|
||
|
|
|
||
|
|
return ESP_OK;
|
||
|
|
}
|