From d944c0cba698010929b7082c1891234d5a22d8e9 Mon Sep 17 00:00:00 2001
From: Joshua Harlan Lifton <joshua.lifton@crowdsupply.com>
Date: Sat, 7 Sep 2013 22:21:15 -0700
Subject: [PATCH] Port fancyblink example to WaveShare Open103R

---
 .../f1/waveshare-open103r/fancyblink/Makefile | 26 ++++++++
 .../f1/waveshare-open103r/fancyblink/README   |  9 +++
 .../fancyblink/fancyblink.c                   | 61 +++++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 examples/stm32/f1/waveshare-open103r/fancyblink/Makefile
 create mode 100644 examples/stm32/f1/waveshare-open103r/fancyblink/README
 create mode 100644 examples/stm32/f1/waveshare-open103r/fancyblink/fancyblink.c

diff --git a/examples/stm32/f1/waveshare-open103r/fancyblink/Makefile b/examples/stm32/f1/waveshare-open103r/fancyblink/Makefile
new file mode 100644
index 0000000..299f5cc
--- /dev/null
+++ b/examples/stm32/f1/waveshare-open103r/fancyblink/Makefile
@@ -0,0 +1,26 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+## Copyright (C) 2013 Joshua Harlan Lifton <joshua.harlan.lifton@gmail.com>
+##
+## 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/>.
+##
+
+BINARY = fancyblink
+
+LDSCRIPT = ../waveshare-open103r.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f1/waveshare-open103r/fancyblink/README b/examples/stm32/f1/waveshare-open103r/fancyblink/README
new file mode 100644
index 0000000..a4209f1
--- /dev/null
+++ b/examples/stm32/f1/waveshare-open103r/fancyblink/README
@@ -0,0 +1,9 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This program will interleave the blinking of two sets of LEDs. LED1
+and LED3 will blink at the same time and LED2 and LED4 will blink at
+the same time. When LED1 and LED3 are on, LED2 and LED4 will be off,
+and vice versa.
+
diff --git a/examples/stm32/f1/waveshare-open103r/fancyblink/fancyblink.c b/examples/stm32/f1/waveshare-open103r/fancyblink/fancyblink.c
new file mode 100644
index 0000000..117340b
--- /dev/null
+++ b/examples/stm32/f1/waveshare-open103r/fancyblink/fancyblink.c
@@ -0,0 +1,61 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2011 Damjan Marion <damjan.marion@gmail.com>
+ * Copyright (C) 2011 Mark Panajotovic <marko@electrontube.org>
+ * Copyright (C) 2013 Joshua Harlan Lifton <joshua.harlan.lifton@gmail.com>
+ *
+ * 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/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+/* Set STM32 to 24 MHz. */
+static void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_24mhz();
+
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+}
+
+static void gpio_setup(void)
+{
+	/* Set GPIO9-12 (in GPIO port C) to 'output push-pull'. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL,
+		      GPIO9 | GPIO10 | GPIO11 | GPIO12);
+}
+
+int main(void)
+{
+	int i;
+
+	clock_setup();
+	gpio_setup();
+
+	/* Set two LEDs for wigwag effect when toggling. */
+	gpio_set(GPIOC, GPIO9 | GPIO11);
+
+	/* Blink the LEDs (PC9 - PC12) on the board. */
+	while (1) {
+		gpio_toggle(GPIOC, GPIO9 | GPIO10 | GPIO11 | GPIO12);
+		for (i = 0; i < 2000000; i++)      /* Wait a bit. */
+			__asm__("nop");
+	}
+
+	return 0;
+}