swuart/: merge library part into libubb

libubb/include/ubb/swuart.h

@@ -0,0 +1,35 @@
+/*
+ * include/ubb/swuart.h - Software-implemented UART for UBB
+ *
+ * Written 2012 by Werner Almesberger
+ * Copyright 2012 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 UBB_SWUART_H
+#define UBB_SWUART_H
+
+#include <stdint.h>
+
+
+struct swuart_err {
+	unsigned glitch;	/* unstable start bit */
+	unsigned framing;	/* stop bit wasn't "1" */
+	unsigned overflow;	/* buffer overflow */
+};
+
+
+int swuart_trx(void *out, int out_size, void *in, int in_size,
+    int wait_bits, int idle_bits);
+
+unsigned swuart_get_errors(struct swuart_err *res);
+void swuart_clear_errors(void);
+
+int swuart_open(uint32_t tx, uint32_t rx, int bps);
+void swuart_close(void);
+
+#endif /* !UBB_SWUART_H */