add opengl fronend, remove sdl frontend, refactor build system

1 files changed, 49 insertions, 0 deletions

diff --git a/frontends/calculator/CEdev/examples/keypad_arrows/src/main.c b/frontends/calculator/CEdev/examples/keypad_arrows/src/main.c
new file mode 100644
index 0000000..c4f7adf
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/keypad_arrows/src/main.c
@@ -0,0 +1,49 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <tice.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <keypadc.h>
+
+/* Function Prototypes */
+void fill_screen(uint8_t color);
+
+void main(void) {
+    /* Key variable */
+    kb_key_t key;
+
+    /* Loop until 2nd is pressed */
+    do {
+        /* Update kb_Data */
+        kb_Scan();
+
+        /* Load group 7 registers */
+        key = kb_Data[7];
+
+        switch (key) {
+            case kb_Down:           /* Change screen color to black */
+                fill_screen(0x00);
+                break;
+            case kb_Right:          /* Change screen color to red */
+                fill_screen(0xE0);
+                break;
+            case kb_Up:             /* Change screen color to white */
+                fill_screen(0xFF);
+                break;
+            case kb_Left:           /* Change screen color to a different red */
+                fill_screen(0xC0);
+                break;
+            default:
+                break;
+        }
+    } while (kb_Data[1] != kb_2nd);
+}
+
+/* Simple way to fill the screen with a given color */
+void fill_screen(uint8_t color) {
+    memset(lcd_Ram, color, LCD_SIZE);
+}