add opengl fronend, remove sdl frontend, refactor build system

1 files changed, 43 insertions, 0 deletions

diff --git a/frontends/calculator/CEdev/examples/second_counter/src/main.c b/frontends/calculator/CEdev/examples/second_counter/src/main.c
new file mode 100644
index 0000000..8a4ebc5
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/second_counter/src/main.c
@@ -0,0 +1,43 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <tice.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ONE_SECOND         32768/1
+#define HALF_SECOND        32768/2
+#define QUARTER_SECOND     32768/4
+
+/* Put all your code here */
+void main(void) {
+    unsigned seconds = 0;
+    char str[10];
+
+    /* Clear the homescreen */
+    os_ClrHome();
+
+    /* Disable the timer so it doesn't run when we don't want it to be running */
+    timer_Control = TIMER1_DISABLE;
+
+    /* By using the 32768 kHz clock, we can count for exactly 1 second here, or a different interval of time */
+    timer_1_ReloadValue = timer_1_Counter = ONE_SECOND;
+
+    /* Enable the timer, set it to the 32768 kHz clock, enable an interrupt once it reaches 0, and make it count down */
+    timer_Control = TIMER1_ENABLE | TIMER1_32K | TIMER1_0INT | TIMER1_DOWN;
+
+    do {
+        /* If the timer is reloaded, we reached 0 */
+        if (timer_IntStatus & TIMER1_RELOADED) {
+            /* Print a string */
+            sprintf(str, "%u", seconds++);
+            os_SetCursorPos(0, 0);
+            os_PutStrFull(str);
+
+            /* Acknowledge the reload */
+            timer_IntAcknowledge = TIMER1_RELOADED;
+        }
+    } while (!os_GetCSC());
+}