X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Finput.c;fp=src%2Finput.c;h=6a66dd1c77d81c023a77975a565aa31ae8666a2b;hb=6a650e3e08da161fcebeb9181da60e110893fa8b;hp=0000000000000000000000000000000000000000;hpb=bbe2ec049a812155c75da5ecc303bf3793c9cca8;p=gbajam21

diff --git a/src/input.c b/src/input.c
new file mode 100644
index 0000000..6a66dd1
--- /dev/null
+++ b/src/input.c
@@ -0,0 +1,39 @@
+#include "input.h"
+#include "gbaregs.h"
+#include "intr.h"
+
+static void keyintr(void);
+
+static uint16_t bnstate;
+
+void select_input(uint16_t bmask)
+{
+	bnstate = 0;
+
+	mask(INTR_KEY);
+	if(bmask) {
+		REG_KEYCNT = bmask | KEYCNT_IE;
+		interrupt(INTR_KEY, keyintr);
+		unmask(INTR_KEY);
+	} else {
+		REG_KEYCNT = 0;
+		interrupt(INTR_KEY, 0);
+	}
+}
+
+uint16_t get_input(void)
+{
+	uint16_t s;
+
+	mask(INTR_KEY);
+	s = bnstate;
+	bnstate = 0;
+	unmask(INTR_KEY);
+
+	return s;
+}
+
+static void keyintr(void)
+{
+	bnstate |= ~REG_KEYINPUT;
+}