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authorFergus Noble2011-09-15 01:20:45 -0700
committerStephen Caudle2011-10-12 22:13:02 -0400
commitcff706e3ca3823ffb388a4e87c4ef8bf925945c4 (patch)
tree677c4a469da77dff69d91b08f8cbb8b6b529b904 /examples/stm32f1/stm32-discovery/miniblink/miniblink.c
parentce7dd46aef9153c4f98a983977ce7bd2a905134d (diff)
Rename F1 examples folder.
Diffstat (limited to 'examples/stm32f1/stm32-discovery/miniblink/miniblink.c')
-rw-r--r--examples/stm32f1/stm32-discovery/miniblink/miniblink.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/examples/stm32f1/stm32-discovery/miniblink/miniblink.c b/examples/stm32f1/stm32-discovery/miniblink/miniblink.c
new file mode 100644
index 0000000..a05f957
--- /dev/null
+++ b/examples/stm32f1/stm32-discovery/miniblink/miniblink.c
@@ -0,0 +1,71 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * 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/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+void gpio_setup(void)
+{
+ /* Enable GPIOC clock. */
+ /* Manually: */
+ // RCC_APB2ENR |= RCC_APB2ENR_IOPCEN;
+ /* Using API functions: */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+ /* Set GPIO8 (in GPIO port C) to 'output push-pull'. */
+ /* Manually: */
+ // GPIOC_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((8 - 8) * 4) + 2));
+ // GPIOC_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((8 - 8) * 4));
+ /* Using API functions: */
+ gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO8);
+}
+
+int main(void)
+{
+ int i;
+
+ gpio_setup();
+
+ /* Blink the LED (PC8) on the board. */
+ while (1) {
+ /* Manually: */
+ // GPIOC_BSRR = GPIO8; /* LED off */
+ // for (i = 0; i < 800000; i++) /* Wait a bit. */
+ // __asm__("nop");
+ // GPIOC_BRR = GPIO8; /* LED on */
+ // for (i = 0; i < 800000; i++) /* Wait a bit. */
+ // __asm__("nop");
+
+ /* Using API functions gpio_set()/gpio_clear(): */
+ // gpio_set(GPIOC, GPIO8); /* LED off */
+ // for (i = 0; i < 800000; i++) /* Wait a bit. */
+ // __asm__("nop");
+ // gpio_clear(GPIOC, GPIO8); /* LED on */
+ // for (i = 0; i < 800000; i++) /* Wait a bit. */
+ // __asm__("nop");
+
+ /* Using API function gpio_toggle(): */
+ gpio_toggle(GPIOC, GPIO8); /* LED on/off */
+ for (i = 0; i < 800000; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}