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Diffstat (limited to 'examples/stm32/f4/stm32f4-discovery/fancyblink/fancyblink.c')
-rw-r--r--examples/stm32/f4/stm32f4-discovery/fancyblink/fancyblink.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/examples/stm32/f4/stm32f4-discovery/fancyblink/fancyblink.c b/examples/stm32/f4/stm32f4-discovery/fancyblink/fancyblink.c
new file mode 100644
index 0000000..056b446
--- /dev/null
+++ b/examples/stm32/f4/stm32f4-discovery/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>
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/f4/rcc.h>
+#include <libopencm3/stm32/f4/gpio.h>
+
+/* Set STM32 to 168 MHz. */
+void clock_setup(void)
+{
+ rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]);
+
+ /* Enable GPIOD clock. */
+ rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN);
+}
+
+void gpio_setup(void)
+{
+ /* Set GPIO12-15 (in GPIO port D) to 'output push-pull'. */
+ gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,
+ GPIO_PUPD_NONE,
+ GPIO12 | GPIO13 | GPIO14 | GPIO15);
+}
+
+int main(void)
+{
+ int i;
+
+ clock_setup();
+ gpio_setup();
+
+ /* Set two LEDs for wigwag effect when toggling. */
+ gpio_set(GPIOD, GPIO12 | GPIO14);
+
+ /* Blink the LEDs (PD12, PD13, PD14 and PD15) on the board. */
+ while (1) {
+ /* Toggle LEDs. */
+ gpio_toggle(GPIOD, GPIO12 | GPIO13 | GPIO14 | GPIO15);
+ for (i = 0; i < 6000000; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}