combine with desktop project

Signed-off-by: Peter Siegmund <developer@mars3142.org>

src/hal/u8x8_hal_sdl.cpp

@@ -0,0 +1,46 @@
+#include "hal/u8g2_hal_sdl.h"
+
+#include <SDL3/SDL.h>
+#include <cstdint>
+
+uint8_t u8x8_byte_sdl_hw_spi(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
+    switch(msg) {
+    case U8X8_MSG_BYTE_SEND:
+    case U8X8_MSG_BYTE_INIT:
+    case U8X8_MSG_BYTE_SET_DC:
+    case U8X8_MSG_BYTE_START_TRANSFER:
+    case U8X8_MSG_BYTE_END_TRANSFER:
+        break;
+
+    default:
+        return 0;
+    }
+    return 1;
+}
+
+uint8_t u8x8_gpio_and_delay_sdl(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
+    switch(msg) {
+    case U8X8_MSG_DELAY_MILLI:
+        SDL_Delay(arg_int);
+        break;
+
+    case U8X8_MSG_DELAY_10MICRO:
+        SDL_Delay((arg_int + 99) / 100);
+        break;
+
+    case U8X8_MSG_DELAY_100NANO:
+    case U8X8_MSG_DELAY_NANO:
+        SDL_Delay(1);
+        break;
+
+    case U8X8_MSG_GPIO_AND_DELAY_INIT:
+    case U8X8_MSG_GPIO_RESET:
+    case U8X8_MSG_GPIO_CS:
+    case U8X8_MSG_GPIO_DC:
+        break;
+
+    default:
+        break;
+    }
+    return 1;
+}