Initialer Commit

n76e003_blink/blink_raw.c

@@ -0,0 +1,72 @@
+/* Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+#include <stdint.h>
+#include "n76e003.h"
+
+// 16Mhz clock
+#define CLOCK 16000000L
+// Divide by 12
+#define T0CLOCK ((CLOCK)/12L)
+// Per milisecond
+#define T0_1MS ((T0CLOCK)/1000L)
+
+static void msdelay(uint32_t count)
+{
+	int16_t reload = -T0_1MS;
+
+	// Input = Fsys/12
+	SET_FIELD(CKCON, T0M, 0);
+	// Mode 1
+	SET_FIELD(TMOD,  T0M, 1);
+
+	// Start
+	TR0 = 1;
+    while (count != 0)
+    {
+        TL0 = reload      & 0xFF;
+        TH0 = reload >> 8 & 0xFF;;
+
+        while(!TF0);
+        TF0 = 0;
+
+	    count--;
+    }
+    TR0 = 0;
+}
+
+void main() {
+	// Set pins in old-skool Quasi Bidirectional mode
+	P0M1 = 0;
+	P0M2 = 0;
+	P1M1 = 0;
+	P1M2 = 0;
+	P3M1 = 0;
+	P3M2 = 0;
+
+	for (;;) {
+		int i;
+		for (i = 0; i < 10; i++) {
+			P01 = 0;
+			P13 = 0;
+			msdelay(500);
+			P01 = 0;
+			P13 = 0;
+			msdelay(500);
+			P01 = 0;
+			P13 = 0;
+			msdelay(500);
+			P01 = 0;
+			P13 = 0;
+			msdelay(500);
+		}
+	}
+}