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Diffstat (limited to 'examples/stm32/f1/obldc-strip/led/led.c')
-rw-r--r--examples/stm32/f1/obldc-strip/led/led.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/examples/stm32/f1/obldc-strip/led/led.c b/examples/stm32/f1/obldc-strip/led/led.c
new file mode 100644
index 0000000..e9fb92f
--- /dev/null
+++ b/examples/stm32/f1/obldc-strip/led/led.c
@@ -0,0 +1,65 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * 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/f1/rcc.h>
+#include <libopencm3/stm32/f1/gpio.h>
+
+void clock_setup(void)
+{
+ /* Set STM32 to 64 MHz. */
+ rcc_clock_setup_in_hsi_out_64mhz();
+
+ /* Enable alternate function peripheral clock. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
+
+ /* Enable GPIOB clock. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
+}
+
+void gpio_setup(void)
+{
+
+ /* Configure PB4 as GPIO. */
+ AFIO_MAPR |= AFIO_MAPR_SWJ_CFG_FULL_SWJ_NO_JNTRST;
+
+ /* Set GPIO4 and 5 (in GPIO port B) to 'output push-pull'. */
+ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO4 | GPIO5);
+
+}
+
+int main(void)
+{
+ int i;
+
+ clock_setup();
+ gpio_setup();
+
+ /* Blink the LEDs on the board. */
+ while (1) {
+ gpio_toggle(GPIOB, GPIO4); /* LED on/off */
+ for (i = 0; i < 8000000; i++) /* Wait a bit. */
+ __asm__("nop");
+ gpio_toggle(GPIOB, GPIO5); /* LED on/off */
+ for (i = 0; i < 8000000; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}