moved atusb/fw3/ to atusb/fw/

atusb/fw/spi.h

@@ -0,0 +1,27 @@
+/*
+ * fw/spi.h - ATmega8 family SPI I/O
+ *
+ * Written 2011 by Werner Almesberger
+ * Copyright 2011 Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef SPI_H
+#define	SPI_H
+
+#include <stdint.h>
+
+
+void spi_begin(void);
+uint8_t spi_io(uint8_t v);
+void spi_end(void);
+void spi_init(void);
+
+#define	spi_send(v)	(void) spi_io(v)
+#define	spi_recv(v)	spi_io(0)
+
+#endif /* !SPI_H */