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framebuffer things

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This commit is contained in:
Dylan Smith
2026-01-15 16:49:53 -05:00
parent c77baa9724
commit 6711b5dcc1
7 changed files with 67 additions and 19 deletions
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5
Core/Inc/graphics/display.h
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@@ -34,6 +34,9 @@ typedef rgb888_pixel_t pixel_t;
(((r & 0xFF) << 16) | ((g & 0xFF) << 8) | (b & 0xFF))
#endif // PIXEL_FORMAT_888
extern volatile pixel_t framebuffer[DISPLAY_HEIGHT * DISPLAY_WIDTH];
extern volatile pixel_t *current_framebuffer;
extern volatile pixel_t *next_framebuffer;
void swap_framebuffers(void);
#endif

4
Core/Inc/graphics/menu.h
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@@ -45,7 +45,7 @@ void draw_menu(volatile pixel_t *const framebuffer, const graphical_menu_t *cons
void partial_redraw_menu(volatile pixel_t *const framebuffer, graphical_menu_t *const menu, uint8_t old_highlighted_entry_idx, uint8_t new_highlighted_entry_idx);
void select_menu_entry(graphical_menu_t *const menu);
void set_selected_menu_entry_idx(volatile pixel_t *const framebuffer, graphical_menu_t *const menu, uint8_t idx);
void decrement_selected_menu_entry_idx(graphical_menu_t *const menu);
void increment_selected_menu_entry_idx(graphical_menu_t *const menu);
void decrement_selected_menu_entry_idx(volatile pixel_t *const framebuffer, graphical_menu_t *const menu);
void increment_selected_menu_entry_idx(volatile pixel_t *const framebuffer, graphical_menu_t *const menu);
#endif

38
Core/Src/graphics/display.c
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@@ -1,4 +1,40 @@
#include "main.h"
#include "display.h"
__attribute__((section(".sdram")))
volatile pixel_t framebuffer[DISPLAY_HEIGHT * DISPLAY_WIDTH];
volatile pixel_t framebuffer1[DISPLAY_HEIGHT * DISPLAY_WIDTH];
volatile pixel_t framebuffer2[DISPLAY_HEIGHT * DISPLAY_WIDTH];
volatile pixel_t *current_framebuffer = framebuffer1;
volatile pixel_t *next_framebuffer = framebuffer2;
extern LTDC_HandleTypeDef hltdc;
extern DMA2D_HandleTypeDef hdma2d;
void HAL_LTDC_LineEventCallback(LTDC_HandleTypeDef *hltdc)
{
// Swap the LTDC's active framebuffer address to the back buffer
HAL_LTDC_SetAddress(hltdc, (uint32_t)current_framebuffer, 0);
// Clear the Line Interrupt pending bit
HAL_NVIC_DisableIRQ(LTDC_IRQn);
}
void copy_current_to_next_framebuffer(void)
{
for (uint32_t i = 0; i < DISPLAY_HEIGHT * DISPLAY_WIDTH; i++)
{
next_framebuffer[i] = current_framebuffer[i];
}
}
void swap_framebuffers(void)
{
volatile pixel_t *temp = current_framebuffer;
current_framebuffer = next_framebuffer;
next_framebuffer = temp;
HAL_LTDC_ProgramLineEvent(&hltdc, 296);
HAL_NVIC_EnableIRQ(LTDC_IRQn);
copy_current_to_next_framebuffer();
}

5
Core/Src/graphics/graphics.c
View File

@@ -1,4 +1,5 @@
#include "graphics.h"
#include "display.h"
void DisplayTest(pixel_t color)
{
@@ -6,7 +7,7 @@ void DisplayTest(pixel_t color)
{
for (uint16_t w = 0; w < DISPLAY_WIDTH; w++)
{
framebuffer[(h * DISPLAY_WIDTH) + w] = color;
next_framebuffer[(h * DISPLAY_WIDTH) + w] = color;
}
}
@@ -20,7 +21,7 @@ void DrawBox(uint32_t topleft_x_loc, uint32_t topleft_y_loc, uint32_t width, uin
{
if (x < DISPLAY_WIDTH && y < DISPLAY_HEIGHT)
{
framebuffer[(y * DISPLAY_WIDTH) + x] = color;
next_framebuffer[(y * DISPLAY_WIDTH) + x] = color;
}
}
}

10
Core/Src/graphics/menu.c
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@@ -6,10 +6,10 @@
static const uint16_t entry_height = 40;
static const uint16_t padding_x = 10;
static const uint16_t padding_y = 0;
static const pixel_t enabled_text_color = MAKE_PIXEL(0, 0, 0);
static const pixel_t enabled_text_color = MAKE_PIXEL(255, 255, 255);
static const pixel_t disabled_text_color = MAKE_PIXEL(128, 128, 128);
static const pixel_t entry_bg_color = MAKE_PIXEL(255, 255, 255);
static const pixel_t highlighted_bg_color = MAKE_PIXEL(0, 0, 0);
static const pixel_t entry_bg_color = MAKE_PIXEL(0, 0, 0);
static const pixel_t highlighted_bg_color = MAKE_PIXEL(50, 50, 50);
static const pixel_t highlighted_text_color = MAKE_PIXEL(255, 255, 0);
void draw_menu_entry(volatile pixel_t *const framebuffer, const graphical_menu_t *const menu, uint8_t entry_idx)
@@ -112,7 +112,7 @@ void set_selected_menu_entry_idx(volatile pixel_t *const framebuffer, graphical_
partial_redraw_menu(framebuffer, menu, old_highlighted_entry_idx, idx);
}
void decrement_selected_menu_entry_idx(graphical_menu_t *const menu)
void decrement_selected_menu_entry_idx(volatile pixel_t *const framebuffer, graphical_menu_t *const menu)
{
if (menu->selected_entry_idx == 0)
{
@@ -122,7 +122,7 @@ void decrement_selected_menu_entry_idx(graphical_menu_t *const menu)
set_selected_menu_entry_idx(framebuffer, menu, menu->selected_entry_idx - 1);
}
void increment_selected_menu_entry_idx(graphical_menu_t *const menu)
void increment_selected_menu_entry_idx(volatile pixel_t *const framebuffer, graphical_menu_t *const menu)
{
if (menu->selected_entry_idx == menu->layout->num_entries - 1)
{

11
Core/Src/main.c
View File

@@ -474,15 +474,20 @@ static void MX_DMA2D_Init(void)
/* USER CODE END DMA2D_Init 0 */
// Configure DMA2D for RGB565 memory-to-memory copy
hdma2d.Init.ColorMode = DMA2D_OUTPUT_RGB565;
HAL_DMA2D_Init(&hdma2d);
HAL_DMA2D_ConfigLayer(&hdma2d, 1);
/* USER CODE BEGIN DMA2D_Init 1 */
/* USER CODE END DMA2D_Init 1 */
hdma2d.Instance = DMA2D;
hdma2d.Init.Mode = DMA2D_M2M;
hdma2d.Init.ColorMode = DMA2D_OUTPUT_ARGB8888;
hdma2d.Init.ColorMode = DMA2D_OUTPUT_RGB565;
hdma2d.Init.OutputOffset = 0;
hdma2d.LayerCfg[1].InputOffset = 0;
hdma2d.LayerCfg[1].InputColorMode = DMA2D_INPUT_ARGB8888;
hdma2d.LayerCfg[1].InputColorMode = DMA2D_INPUT_RGB565;
hdma2d.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
hdma2d.LayerCfg[1].InputAlpha = 0;
if (HAL_DMA2D_Init(&hdma2d) != HAL_OK)
@@ -593,7 +598,7 @@ static void MX_LTDC_Init(void)
pLayerCfg.Alpha0 = 0;
pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_PAxCA;
pLayerCfg.FBStartAdress = (uint32_t)(&framebuffer);
pLayerCfg.FBStartAdress = (uint32_t)(&current_framebuffer);
pLayerCfg.ImageWidth = 240;
pLayerCfg.ImageHeight = 320;
pLayerCfg.Backcolor.Blue = 0;

13
Core/Src/ui.c
View File

@@ -1,6 +1,6 @@
#include "ui.h"
#include "graphics.h"
#include "menu.h"
#include "display.h"
void ui_enter_submenu(void *const args);
@@ -61,7 +61,7 @@ enum ui_state_t {
};
static bool redraw_requested = true;
static enum ui_state_t ui_state = UI_STATE_MENU;
// static enum ui_state_t ui_state = UI_STATE_MENU;
static graphical_menu_t *current_menu = &main_menu;
/************************* */
@@ -97,12 +97,14 @@ void ui_right_button_pressed(void)
void ui_up_button_pressed(void)
{
decrement_selected_menu_entry_idx(current_menu);
decrement_selected_menu_entry_idx(next_framebuffer, current_menu);
swap_framebuffers();
}
void ui_down_button_pressed(void)
{
increment_selected_menu_entry_idx(current_menu);
increment_selected_menu_entry_idx(next_framebuffer, current_menu);
swap_framebuffers();
}
void ui_ok_button_pressed(void)
@@ -120,6 +122,7 @@ void ui_task(void)
if (redraw_requested)
{
redraw_requested = false;
draw_menu(framebuffer, current_menu);
draw_menu(next_framebuffer, current_menu);
swap_framebuffers();
}
}