add opengl fronend, remove sdl frontend, refactor build system

1 files changed, 30 insertions, 0 deletions

diff --git a/frontends/calculator/CEdev/examples/lcd_fill/src/main.c b/frontends/calculator/CEdev/examples/lcd_fill/src/main.c
new file mode 100644
index 0000000..ee96bf7
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/lcd_fill/src/main.c
@@ -0,0 +1,30 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <tice.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* Function prototypes */
+void fill_screen(uint8_t color);
+
+void main(void) { 
+    /* Turn the whole screen black */
+    fill_screen(0x00);
+
+    /* Wait for a key press */
+    while (!os_GetCSC());
+
+    /* Turn the whole screen red */
+    fill_screen(0xe0);
+
+    /* Wait for a key press */
+    while (!os_GetCSC());
+}
+
+/* Fill the screen with a given color */
+void fill_screen(uint8_t color) {
+    memset(lcd_Ram, color, LCD_SIZE);
+}