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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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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();
}