353 lines
8.5 KiB
C
353 lines
8.5 KiB
C
/*
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* Copyright (c) 2018-2019 Jan Van Winkel <jan.van_winkel@dxplore.eu>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <init.h>
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#include <zephyr.h>
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#include <lvgl.h>
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#include "lvgl_display.h"
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#ifdef CONFIG_LVGL_USE_FILESYSTEM
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#include "lvgl_fs.h"
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#endif
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#ifdef CONFIG_LVGL_POINTER_KSCAN
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#include <drivers/kscan.h>
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#endif
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#include LV_MEM_CUSTOM_INCLUDE
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#define LOG_LEVEL CONFIG_LVGL_LOG_LEVEL
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#include <logging/log.h>
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LOG_MODULE_REGISTER(lvgl);
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#ifdef CONFIG_LVGL_BUFFER_ALLOC_STATIC
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static lv_disp_buf_t disp_buf;
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#define BUFFER_SIZE (CONFIG_LVGL_BITS_PER_PIXEL * ((CONFIG_LVGL_VDB_SIZE * \
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CONFIG_LVGL_HOR_RES_MAX * CONFIG_LVGL_VER_RES_MAX) / 100) / 8)
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#define NBR_PIXELS_IN_BUFFER (BUFFER_SIZE * 8 / CONFIG_LVGL_BITS_PER_PIXEL)
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/* NOTE: depending on chosen color depth buffer may be accessed using uint8_t *,
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* uint16_t * or uint32_t *, therefore buffer needs to be aligned accordingly to
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* prevent unaligned memory accesses.
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*/
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static uint8_t buf0[BUFFER_SIZE] __aligned(4);
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#ifdef CONFIG_LVGL_DOUBLE_VDB
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static uint8_t buf1[BUFFER_SIZE] __aligned(4);
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#endif
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#endif /* CONFIG_LVGL_BUFFER_ALLOC_STATIC */
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#if CONFIG_LVGL_LOG_LEVEL != 0
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static void lvgl_log(lv_log_level_t level, const char *file, uint32_t line,
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const char *func, const char *dsc)
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{
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/* Convert LVGL log level to Zephyr log level
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*
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* LVGL log level mapping:
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* * LV_LOG_LEVEL_TRACE 0
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* * LV_LOG_LEVEL_INFO 1
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* * LV_LOG_LEVEL_WARN 2
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* * LV_LOG_LEVEL_ERROR 3
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* * LV_LOG_LEVEL_NUM 4
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*
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* Zephyr log level mapping:
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* * LOG_LEVEL_NONE 0
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* * LOG_LEVEL_ERR 1
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* * LOG_LEVEL_WRN 2
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* * LOG_LEVEL_INF 3
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* * LOG_LEVEL_DBG 4
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*/
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uint8_t zephyr_level = LOG_LEVEL_DBG - level;
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ARG_UNUSED(file);
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ARG_UNUSED(line);
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ARG_UNUSED(func);
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Z_LOG(zephyr_level, "%s", log_strdup(dsc));
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}
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#endif
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#ifdef CONFIG_LVGL_BUFFER_ALLOC_STATIC
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static int lvgl_allocate_rendering_buffers(lv_disp_drv_t *disp_drv)
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{
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struct display_capabilities cap;
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const struct device *display_dev = (const struct device *)disp_drv->user_data;
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int err = 0;
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display_get_capabilities(display_dev, &cap);
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if (cap.x_resolution <= CONFIG_LVGL_HOR_RES_MAX) {
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disp_drv->hor_res = cap.x_resolution;
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} else {
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LOG_ERR("Horizontal resolution is larger than maximum");
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err = -ENOTSUP;
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}
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if (cap.y_resolution <= CONFIG_LVGL_VER_RES_MAX) {
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disp_drv->ver_res = cap.y_resolution;
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} else {
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LOG_ERR("Vertical resolution is larger than maximum");
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err = -ENOTSUP;
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}
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disp_drv->buffer = &disp_buf;
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#ifdef CONFIG_LVGL_DOUBLE_VDB
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lv_disp_buf_init(disp_drv->buffer, &buf0, &buf1, NBR_PIXELS_IN_BUFFER);
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#else
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lv_disp_buf_init(disp_drv->buffer, &buf0, NULL, NBR_PIXELS_IN_BUFFER);
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#endif /* CONFIG_LVGL_DOUBLE_VDB */
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return err;
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}
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#else
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static int lvgl_allocate_rendering_buffers(lv_disp_drv_t *disp_drv)
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{
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void *buf0 = NULL;
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void *buf1 = NULL;
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uint16_t buf_nbr_pixels;
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uint32_t buf_size;
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struct display_capabilities cap;
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const struct device *display_dev = (const struct device *)disp_drv->user_data;
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display_get_capabilities(display_dev, &cap);
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disp_drv->hor_res = cap.x_resolution;
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disp_drv->ver_res = cap.y_resolution;
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buf_nbr_pixels = (CONFIG_LVGL_VDB_SIZE * disp_drv->hor_res *
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disp_drv->ver_res) / 100;
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/* one horizontal line is the minimum buffer requirement for lvgl */
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if (buf_nbr_pixels < disp_drv->hor_res) {
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buf_nbr_pixels = disp_drv->hor_res;
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}
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switch (cap.current_pixel_format) {
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case PIXEL_FORMAT_ARGB_8888:
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buf_size = 4 * buf_nbr_pixels;
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break;
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case PIXEL_FORMAT_RGB_888:
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buf_size = 3 * buf_nbr_pixels;
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break;
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case PIXEL_FORMAT_RGB_565:
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buf_size = 2 * buf_nbr_pixels;
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break;
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case PIXEL_FORMAT_MONO01:
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case PIXEL_FORMAT_MONO10:
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buf_size = buf_nbr_pixels / 8;
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buf_size += (buf_nbr_pixels % 8) == 0 ? 0 : 1;
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break;
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default:
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return -ENOTSUP;
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}
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buf0 = LV_MEM_CUSTOM_ALLOC(buf_size);
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if (buf0 == NULL) {
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LOG_ERR("Failed to allocate memory for rendering buffer");
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return -ENOMEM;
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}
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#ifdef CONFIG_LVGL_DOUBLE_VDB
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buf1 = LV_MEM_CUSTOM_ALLOC(buf_size);
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if (buf1 == NULL) {
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LV_MEM_CUSTOM_FREE(buf0);
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LOG_ERR("Failed to allocate memory for rendering buffer");
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return -ENOMEM;
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}
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#endif
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disp_drv->buffer = LV_MEM_CUSTOM_ALLOC(sizeof(lv_disp_buf_t));
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if (disp_drv->buffer == NULL) {
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LV_MEM_CUSTOM_FREE(buf0);
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LV_MEM_CUSTOM_FREE(buf1);
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LOG_ERR("Failed to allocate memory to store rendering buffers");
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return -ENOMEM;
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}
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lv_disp_buf_init(disp_drv->buffer, buf0, buf1, buf_nbr_pixels);
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return 0;
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}
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#endif /* CONFIG_LVGL_BUFFER_ALLOC_STATIC */
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#ifdef CONFIG_LVGL_POINTER_KSCAN
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K_MSGQ_DEFINE(kscan_msgq, sizeof(lv_indev_data_t),
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CONFIG_LVGL_POINTER_KSCAN_MSGQ_COUNT, 4);
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static void lvgl_pointer_kscan_callback(const struct device *dev,
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uint32_t row,
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uint32_t col, bool pressed)
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{
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lv_indev_data_t data = {
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.point.x = col,
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.point.y = row,
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.state = pressed ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL,
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};
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if (k_msgq_put(&kscan_msgq, &data, K_NO_WAIT) != 0) {
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LOG_ERR("Could put input data into queue");
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}
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}
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static bool lvgl_pointer_kscan_read(lv_indev_drv_t *drv, lv_indev_data_t *data)
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{
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lv_disp_t *disp;
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const struct device *disp_dev;
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struct display_capabilities cap;
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lv_indev_data_t curr;
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static lv_indev_data_t prev = {
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.point.x = 0,
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.point.y = 0,
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.state = LV_INDEV_STATE_REL,
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};
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if (k_msgq_get(&kscan_msgq, &curr, K_NO_WAIT) != 0) {
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goto set_and_release;
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}
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prev = curr;
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disp = lv_disp_get_default();
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disp_dev = disp->driver.user_data;
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display_get_capabilities(disp_dev, &cap);
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/* adjust kscan coordinates */
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if (IS_ENABLED(CONFIG_LVGL_POINTER_KSCAN_SWAP_XY)) {
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lv_coord_t x;
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x = prev.point.x;
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prev.point.x = prev.point.y;
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prev.point.y = x;
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}
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if (IS_ENABLED(CONFIG_LVGL_POINTER_KSCAN_INVERT_X)) {
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if (cap.current_orientation == DISPLAY_ORIENTATION_NORMAL ||
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cap.current_orientation == DISPLAY_ORIENTATION_ROTATED_180) {
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prev.point.x = cap.x_resolution - prev.point.x;
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} else {
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prev.point.x = cap.y_resolution - prev.point.x;
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}
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}
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if (IS_ENABLED(CONFIG_LVGL_POINTER_KSCAN_INVERT_Y)) {
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if (cap.current_orientation == DISPLAY_ORIENTATION_NORMAL ||
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cap.current_orientation == DISPLAY_ORIENTATION_ROTATED_180) {
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prev.point.y = cap.y_resolution - prev.point.y;
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} else {
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prev.point.y = cap.x_resolution - prev.point.y;
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}
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}
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/* rotate touch point to match display rotation */
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if (cap.current_orientation == DISPLAY_ORIENTATION_ROTATED_90) {
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lv_coord_t x;
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x = prev.point.x;
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prev.point.x = prev.point.y;
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prev.point.y = cap.y_resolution - x;
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} else if (cap.current_orientation == DISPLAY_ORIENTATION_ROTATED_180) {
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prev.point.x = cap.x_resolution - prev.point.x;
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prev.point.y = cap.y_resolution - prev.point.y;
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} else if (cap.current_orientation == DISPLAY_ORIENTATION_ROTATED_270) {
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lv_coord_t x;
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x = prev.point.x;
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prev.point.x = cap.x_resolution - prev.point.y;
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prev.point.y = x;
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}
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set_and_release:
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*data = prev;
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return k_msgq_num_used_get(&kscan_msgq) > 0;
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}
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static int lvgl_pointer_kscan_init(void)
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{
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const struct device *kscan_dev =
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device_get_binding(CONFIG_LVGL_POINTER_KSCAN_DEV_NAME);
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lv_indev_drv_t indev_drv;
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if (kscan_dev == NULL) {
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LOG_ERR("Keyboard scan device not found.");
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return -ENODEV;
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}
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if (kscan_config(kscan_dev, lvgl_pointer_kscan_callback) < 0) {
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LOG_ERR("Could not configure keyboard scan device.");
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return -ENODEV;
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}
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lv_indev_drv_init(&indev_drv);
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indev_drv.type = LV_INDEV_TYPE_POINTER;
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indev_drv.read_cb = lvgl_pointer_kscan_read;
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if (lv_indev_drv_register(&indev_drv) == NULL) {
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LOG_ERR("Failed to register input device.");
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return -EPERM;
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}
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kscan_enable_callback(kscan_dev);
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return 0;
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}
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#endif /* CONFIG_LVGL_POINTER_KSCAN */
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static int lvgl_init(const struct device *dev)
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{
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ARG_UNUSED(dev);
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const struct device *display_dev =
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device_get_binding(CONFIG_LVGL_DISPLAY_DEV_NAME);
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int err = 0;
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lv_disp_drv_t disp_drv;
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if (display_dev == NULL) {
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LOG_ERR("Display device not found.");
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return -ENODEV;
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}
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#if CONFIG_LVGL_LOG_LEVEL != 0
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lv_log_register_print_cb(lvgl_log);
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#endif
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lv_init();
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#ifdef CONFIG_LVGL_USE_FILESYSTEM
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lvgl_fs_init();
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#endif
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lv_disp_drv_init(&disp_drv);
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disp_drv.user_data = (void *) display_dev;
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err = lvgl_allocate_rendering_buffers(&disp_drv);
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if (err != 0) {
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return err;
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}
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if (set_lvgl_rendering_cb(&disp_drv) != 0) {
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LOG_ERR("Display not supported.");
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return -ENOTSUP;
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}
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if (lv_disp_drv_register(&disp_drv) == NULL) {
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LOG_ERR("Failed to register display device.");
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return -EPERM;
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}
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#ifdef CONFIG_LVGL_POINTER_KSCAN
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lvgl_pointer_kscan_init();
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#endif /* CONFIG_LVGL_POINTER_KSCAN */
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return 0;
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}
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SYS_INIT(lvgl_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
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