From a8b3daeb57e47381ab2d675bed29f66368244573 Mon Sep 17 00:00:00 2001
From: Frantisek Burian <BuFran@seznam.cz>
Date: Sat, 14 Dec 2013 19:14:36 +0100
Subject: [PATCH] [EXAMPLE:F0] Add simple miniblink example

---
 .../f0/stm32f0-discovery/miniblink/Makefile   | 25 +++++++
 .../f0/stm32f0-discovery/miniblink/README     |  9 +++
 .../stm32f0-discovery/miniblink/miniblink.c   | 73 +++++++++++++++++++
 3 files changed, 107 insertions(+)
 create mode 100644 examples/stm32/f0/stm32f0-discovery/miniblink/Makefile
 create mode 100644 examples/stm32/f0/stm32f0-discovery/miniblink/README
 create mode 100644 examples/stm32/f0/stm32f0-discovery/miniblink/miniblink.c

diff --git a/examples/stm32/f0/stm32f0-discovery/miniblink/Makefile b/examples/stm32/f0/stm32f0-discovery/miniblink/Makefile
new file mode 100644
index 0000000..a6df22a
--- /dev/null
+++ b/examples/stm32/f0/stm32f0-discovery/miniblink/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## 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 = miniblink
+
+LDSCRIPT = ../stm32f0-discovery.ld
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f0/stm32f0-discovery/miniblink/README b/examples/stm32/f0/stm32f0-discovery/miniblink/README
new file mode 100644
index 0000000..351655f
--- /dev/null
+++ b/examples/stm32/f0/stm32f0-discovery/miniblink/README
@@ -0,0 +1,9 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is the smallest-possible example program using libopencm3.
+
+It's intended for the ST STM32F0-DISCOVERY eval board. It should blink
+the blue LED on the board.
+
diff --git a/examples/stm32/f0/stm32f0-discovery/miniblink/miniblink.c b/examples/stm32/f0/stm32f0-discovery/miniblink/miniblink.c
new file mode 100644
index 0000000..9b1c5d8
--- /dev/null
+++ b/examples/stm32/f0/stm32f0-discovery/miniblink/miniblink.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
+ * Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
+ *
+ * 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>
+
+#define PORT_LED GPIOC
+#define PIN_LED GPIO8
+
+static void gpio_setup(void)
+{
+	/* Enable GPIOB clock. */
+	/* Manually: */
+	//RCC_AHBENR |= RCC_AHBENR_GPIOCEN;
+	/* Using API functions: */
+	rcc_periph_clock_enable(RCC_GPIOC);   
+	
+
+	/* Set GPIO6 (in GPIO port B) to 'output push-pull'. */
+	/* Using API functions: */
+	gpio_mode_setup(PORT_LED, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, PIN_LED);
+}
+
+int main(void)
+{
+	int i;
+
+	gpio_setup();
+
+	/* Blink the LED (PC8) on the board. */
+	while (1) {
+		/* Manually: */
+		// GPIOC_BSRR = PIN_LED;		/* LED off */
+		// for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+		// 	__asm__("nop");
+		// GPIOC_BRR = PIN_LED;		/* LED on */
+		// for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+		// 	__asm__("nop");
+
+		/* Using API functions gpio_set()/gpio_clear(): */
+		// gpio_set(PORT_LED, PIN_LED);	/* LED off */
+		// for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+		// 	__asm__("nop");
+		// gpio_clear(PORT_LED, PIN_LED);	/* LED on */
+		// for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+		// 	__asm__("nop");
+
+		/* Using API function gpio_toggle(): */
+		gpio_toggle(PORT_LED, PIN_LED);	/* LED on/off */
+		for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+			__asm__("nop");
+	}
+
+	return 0;
+}