WIP

Core/Inc/graphics/display.h

@@ -5,10 +5,14 @@
 
 #define DISPLAY_WIDTH 240
 #define DISPLAY_HEIGHT 320
+#define PIXEL_FORMAT_565
+//#define PIXEL_FORMAT_888
 
 typedef uint16_t rgb565_pixel_t;
+typedef uint32_t rgb888_pixel_t;
 
-
+#ifdef PIXEL_FORMAT_565
+typedef rgb565_pixel_t pixel_t;
 
 #define PIXEL_RED(p)   (((p) >> 11) & 0x1F)
 #define PIXEL_GREEN(p) (((p) >> 5)  & 0x3F)
@@ -16,13 +20,20 @@ typedef uint16_t rgb565_pixel_t;
 
 #define MAKE_PIXEL(r,g,b) \
     (((r & 0x1F) << 11) | ((g & 0x3F) << 5) | (b & 0x1F))
+#endif // PIXEL_FORMAT_565
 
 
-extern volatile rgb565_pixel_t framebuffer[DISPLAY_HEIGHT * DISPLAY_WIDTH];
+#ifdef PIXEL_FORMAT_888
-extern volatile uint32_t times_changed;
+typedef rgb888_pixel_t pixel_t;
 
+#define PIXEL_RED(p)   (((p) >> 16) & 0xFF)
+#define PIXEL_GREEN(p) (((p) >> 8)  & 0xFF)
+#define PIXEL_BLUE(p)  ((p) & 0xFF)
 
-void DisplayTest(uint16_t color);
+#define MAKE_PIXEL(r,g,b) \
+    (((r & 0xFF) << 16) | ((g & 0xFF) << 8) | (b & 0xFF))
+#endif // PIXEL_FORMAT_888
 
+extern volatile pixel_t framebuffer[DISPLAY_HEIGHT * DISPLAY_WIDTH];
 
 #endif

Core/Inc/graphics/fonts/font.h

@@ -5,6 +5,14 @@
 #include "display.h"
 #include "lvgl.h"
 
+// Font declarations - fonts are defined in separate .c files to avoid static variable conflicts
+#if LVGL_VERSION_MAJOR >= 8
+extern const lv_font_t roboto_bold_font;
+extern const lv_font_t roboto_bold_large_font;
+#else
+extern lv_font_t roboto_bold_font;
+extern lv_font_t roboto_bold_large_font;
+#endif
 
 uint16_t draw_character(rgb565_pixel_t *framebuffer, const lv_font_t *font, const uint16_t x_loc, const uint16_t y_loc, const uint8_t character, rgb565_pixel_t color);
 

Core/Inc/graphics/fonts/lvgl/lvgl.h

@@ -7,6 +7,13 @@
  *
  * This layer includes a lot of code from lv_font_fmt_txt.h to define how
  * a bitmapped font is expressed.
+ *
+ * See:
+ * - https://github.com/lvgl/lv_font_conv
+ * - https://github.com/lvgl/lvgl/blob/master/src/font/lv_font.h
+ * - https://github.com/lvgl/lvgl/blob/master/src/font/fmt_txt/lv_font_fmt_txt.h
+ *
+ * - Dylan
  */
 
 #ifndef LVGL_H
@@ -15,13 +22,27 @@
 #include "stdint.h"
 #include "stdbool.h"
 
-/* Dummy Defines */
+#ifndef NULL
-#define LV_ATTRIBUTE_LARGE_CONST
-#define LV_FONT_SUBPX_NONE 0
 #define NULL 0
+#endif
+
+/******************************************* */
+/* Dummy defines for LVGL font compatibility */
+
+#ifndef LV_ATTRIBUTE_LARGE_CONST
+#define LV_ATTRIBUTE_LARGE_CONST
+#endif
+
+#ifndef LV_FONT_SUBPX_NONE
+#define LV_FONT_SUBPX_NONE 0
+#endif
+
+#ifndef LVGL_VERSION_MAJOR
 #define LVGL_VERSION_MAJOR 7
 #define LV_VERSION_CHECK(X,Y,Z) 0
+#endif
 
+/******************** */
 /* Struct Definitions */
 
 typedef struct _lv_font_t lv_font_t;

Core/Inc/graphics/graphics.h

@@ -0,0 +1,10 @@
+#ifndef GRAPHICS_H
+#define GRAPHICS_H
+
+#include "display.h"
+#include "stdint.h"
+
+void DisplayTest(pixel_t color);
+void DrawBox(uint32_t topleft_x_loc, uint32_t topleft_y_loc, uint32_t height, uint32_t width, pixel_t color);
+
+#endif

Core/Inc/graphics/menu.h

@@ -0,0 +1,25 @@
+#ifndef MENU_H
+#define MENU_H
+
+#include "stdint.h"
+#include "stdbool.h"
+
+
+typedef struct
+{
+    uint8_t *title;
+    bool enabled; // not enabled = grayed out, unselectable
+    void *highlighted_callback_function;
+    void *selected_callback_function;
+} graphical_menu_entry_t;
+
+
+typedef struct _graphical_menu_t graphical_menu_t;
+struct _graphical_menu_t {
+    graphical_menu_t *parent_menu;
+    uint8_t num_entries;
+    uint8_t highlighted_idx;
+    graphical_menu_entry_t *entries;
+};
+
+#endif

Core/Src/graphics/display.c

@@ -0,0 +1,4 @@
+#include "display.h"
+
+__attribute__((section(".sdram")))
+volatile pixel_t framebuffer[DISPLAY_HEIGHT * DISPLAY_WIDTH];

Core/Src/graphics/fonts/font.c

@@ -17,6 +17,7 @@ static uint16_t find_glyph_id_in_cmap(const lv_font_fmt_txt_cmap_t * cmap, uint3
     return 0;
 }
 
+
 bool lv_font_get_glyph_dsc_fmt_txt(const lv_font_t * font, lv_font_fmt_txt_glyph_dsc_t * dsc_out, uint32_t character)
 {
     lv_font_fmt_txt_dsc_t *font_dsc = (lv_font_fmt_txt_dsc_t *) font->dsc;
@@ -32,9 +33,10 @@ bool lv_font_get_glyph_dsc_fmt_txt(const lv_font_t * font, lv_font_fmt_txt_glyph
     return false;
 }
 
+// Left as a dummy definition for LVGL font compatibility.
+// We're not processing the bitmaps with draw buffers like LVGL does.
 const void * lv_font_get_bitmap_fmt_txt(lv_font_fmt_txt_glyph_dsc_t * g_dsc, lv_draw_buf_t * draw_buf)
 {
-
 }
 
 /**

Core/Src/graphics/fonts/roboto_bold_font.c

@@ -0,0 +1,7 @@
+#include "fonts/roboto_bold_font.h"
+
+// This file exists solely to include the font header in its own translation unit
+// so that the static font_dsc variable doesn't conflict with other fonts.
+// The font pointer (roboto_bold_font) is defined in the header and exported
+// for use in other translation units.
+

Core/Src/graphics/fonts/roboto_bold_large_font.c

@@ -0,0 +1,7 @@
+#include "fonts/roboto_bold_large_font.h"
+
+// This file exists solely to include the font header in its own translation unit
+// so that the static font_dsc variable doesn't conflict with other fonts.
+// The font pointer (roboto_bold_large_font) is defined in the header and exported
+// for use in other translation units.
+

Core/Src/graphics/graphics.c

@@ -1,15 +1,7 @@
-#include "display.h"
+#include "graphics.h"
-#include "stm32f4xx_hal_ltdc.h"
 
-__attribute__((section(".sdram")))
+void DisplayTest(pixel_t color)
-volatile rgb565_pixel_t framebuffer[DISPLAY_HEIGHT * DISPLAY_WIDTH];
-
-__attribute__((section(".sdram")))
-volatile uint32_t times_changed;
-
-void DisplayTest(uint16_t color)
 {
-    times_changed++;
     for (uint16_t h = 0; h < DISPLAY_HEIGHT; h++)
     {
         for (uint16_t w = 0; w < DISPLAY_WIDTH; w++)
@@ -18,4 +10,18 @@ void DisplayTest(uint16_t color)
         }
     }
 
+}
+
+void DrawBox(uint32_t topleft_x_loc, uint32_t topleft_y_loc, uint32_t height, uint32_t width, pixel_t color)
+{
+    for (uint32_t y = topleft_y_loc; y < (topleft_y_loc + height); y++)
+    {
+        for (uint32_t x = topleft_x_loc; x < (topleft_x_loc + width); x++)
+        {
+            if (x < DISPLAY_WIDTH && y < DISPLAY_HEIGHT)
+            {
+                framebuffer[(y * DISPLAY_WIDTH) + x] = color;
+            }
+        }
+    }
 }

Core/Src/graphics/menu.c

@@ -0,0 +1,6 @@
+#include "menu.h"
+
+void draw_menu(graphical_menu_t *menu)
+{
+
+}

Core/Src/main.c

@@ -27,7 +27,6 @@
 /* USER CODE BEGIN Includes */
 #include "display.h"
 #include "font.h"
-#include "roboto_bold_font.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -89,6 +88,64 @@ void StartDefaultTask(void const * argument);
 /* Private user code ---------------------------------------------------------*/
 /* USER CODE BEGIN 0 */
 
+/**
+ * @brief Convert a single digit (0-9) to its ASCII character
+ * @param digit: The digit to convert (0-9)
+ * @retval ASCII character '0' through '9'
+ */
+static char digit_to_ascii(uint8_t digit)
+{
+	return (char)('0' + digit);
+}
+
+/**
+ * @brief Convert an unsigned 32-bit integer to a null-terminated string
+ * @param value: The number to convert
+ * @param buffer: Pointer to the output buffer
+ * @param buffer_size: Size of the buffer
+ * @retval None
+ */
+static void uint32_to_string(uint32_t value, uint8_t *buffer, uint8_t buffer_size)
+{
+	uint8_t i = 0;
+	uint8_t digits[10]; // Maximum 10 digits for uint32_t
+	uint8_t digit_count = 0;
+	
+	// Handle zero case
+	if (value == 0)
+	{
+		if (buffer_size > 0)
+		{
+			buffer[0] = '0';
+			buffer[1] = '\0';
+		}
+		return;
+	}
+	
+	// Extract digits from right to left
+	while (value > 0 && digit_count < 10)
+	{
+		digits[digit_count] = (uint8_t)(value % 10);
+		value /= 10;
+		digit_count++;
+	}
+	
+	// Convert digits to ASCII and store in buffer (reversed)
+	for (i = 0; i < digit_count && i < (buffer_size - 1); i++)
+	{
+		buffer[i] = digit_to_ascii(digits[digit_count - 1 - i]);
+	}
+	
+	// Null terminate
+	if (i < buffer_size)
+	{
+		buffer[i] = '\0';
+	}
+	else if (buffer_size > 0)
+	{
+		buffer[buffer_size - 1] = '\0';
+	}
+}
 
 void LCD_Write_Cmd(uint8_t cmd)
 {
@@ -862,16 +919,23 @@ void StartDefaultTask(void const * argument)
   times_changed = 0;
   ILI9341_Init();
 
+  uint8_t time_string[20] = {0};
+  DisplayTest(0xFFFF);
+
+  draw_string(framebuffer, &roboto_bold_font, 10, 75, "Number of beans:", 0x0000);
   
   /* Infinite loop */
   for(;;)
   {
-    DisplayTest(0xffff);
+    uint32_t t = HAL_GetTick() / 100;
-    draw_string(framebuffer, &roboto_bold_font, 25, 25, "Divide Voltage!", 0x0000);
+    // Convert milliseconds to string
-    osDelay(500);
+    uint32_to_string(t, time_string, sizeof(time_string));
-    DisplayTest(0x0000);
+    DrawBox(25, 0, 40, 80, 0xffff);
-    draw_string(framebuffer, &roboto_bold_font, 25, 25, "Divide Voltage!", 0xf800);
+    draw_string(framebuffer, &roboto_bold_font, 25, 25, time_string, 0x0000);
-    osDelay(500);
+    DrawBox(25, 100, 40, 150, 0xffff);
+    draw_string(framebuffer, &roboto_bold_large_font, 25, 125, time_string, 0x001f);
+
+    osDelay(100);
   }
   /* USER CODE END 5 */
 }

STM32Make.make

@@ -76,8 +76,10 @@ endif
 # C sources
 C_SOURCES =  \
 Core/Src/freertos.c \
-Core/Src/graphics/font.c \
+Core/Src/graphics/display.c \
-Core/Src/graphics/graphics.c \
+Core/Src/graphics/fonts/font.c \
+Core/Src/graphics/fonts/roboto_bold_font.c \
+Core/Src/graphics/fonts/roboto_bold_large_font.c \
 Core/Src/main.c \
 Core/Src/stm32f4xx_hal_msp.c \
 Core/Src/stm32f4xx_hal_timebase_tim.c \
@@ -225,7 +227,8 @@ AS_INCLUDES = \
 C_INCLUDES =  \
 -ICore/Inc \
 -ICore/Inc/graphics \
--ICore/Inc/graphics/lvgl \
+-ICore/Inc/graphics/fonts \
+-ICore/Inc/graphics/fonts/lvgl \
 -IDrivers/CMSIS/Device/ST/STM32F4xx/Include \
 -IDrivers/CMSIS/Include \
 -IDrivers/STM32F4xx_HAL_Driver/Inc \