vf6xx: add UART example

The UART's baud rate is calculated using the current clock
configuration from the clock module. This example makes use
of the standard C library and writes the characters to the
UART in blocking mode.

examples/vf6xx/colibri-vf61/colibri-vf61.ld

@@ -0,0 +1,38 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2014 Stefan Agner <stefan@agner.ch>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Colibri VF61 (Vybrid VF610, use sysRAM0, 512KiB). */
+
+/* Define memory regions. */
+MEMORY
+{
+	/*
+	 * Note: 0x1f000000 is an alias for code bus to the same memory
+	 * located at 0x3f000000, hence start with the data section
+	 * at an offset of 256KiB. One can define this section lenghts
+	 * freely
+	 */
+	pc_ram (rwx) : ORIGIN = 0x1f000000, LENGTH = 256K
+	ps_ram (rwx) : ORIGIN = 0x3f040000, LENGTH = 256K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_vf6xx.ld
+