1 files changed, 44 insertions, 0 deletions
diff --git a/blink.c b/blink.c
new file mode 100644
index 00000000..fcbc04d0
--- /dev/null
+++ b/blink.c
@@ -0,0 +1,44 @@
+
+sfr at 0x80 P0;
+sfr at 0x90 P1;
+sfr at 0xA0 P2;
+
+#define PERCFG	SFR(0xF1)
+#define ADCCFG	SFR(0xF2)
+#define P0SEL	SFR(0xF3)
+#define P1SEL	SFR(0xF4)
+#define P2SEL	SFR(0xF5)
+
+sfr at 0xFD P0DIR;
+sfr at 0xFE P1DIR;
+sfr at 0xFE P2DIR;
+sfr at 0x8F P0INP;
+sfr at 0xF6 P1INP;
+sfr at 0xF7 P2INP;
+
+#define P0IFG	SFR(0x89)
+#define P1IFG	SFR(0x8A)
+#define P2IFG	SFR(0x8B)
+
+#define nop()	_asm \
+		nop \
+		_endasm;
+
+main ()
+{
+	int	i, j;
+	/* Set p1_1 to output */
+	P1DIR = 0x02;
+	P1INP = 0x00;
+	P2INP = 0x00;
+	for (;;) {
+		P1 = 0xff;
+		for (j = 0; j < 100; j++)
+			for (i = 0; i < 1000; i++)
+				nop();
+		P1 = 0xfd;
+		for (j = 0; j < 100; j++)
+			for (i = 0; i < 1000; i++)
+				nop();
+	}
+}