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Diffstat (limited to 'examples/MB525/fancyblink/fancyblink.c')
-rw-r--r--examples/MB525/fancyblink/fancyblink.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/examples/MB525/fancyblink/fancyblink.c b/examples/MB525/fancyblink/fancyblink.c
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+++ b/examples/MB525/fancyblink/fancyblink.c
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+/*
+ * This file is part of the libopenstm32 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
+ * 2010 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * 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 <libopenstm32.h>
+
+/* Set STM32 to 72 MHz. */
+void clock_setup(void)
+{
+ /* Select HSI as SYSCLK source. */
+ rcc_set_sysclk_source(SW_SYSCLKSEL_HSICLK);
+
+ /* Set the PLL multiplication factor to 9. */
+ rcc_set_pll_multiplication_factor(PLLMUL_PLL_CLK_MUL9);
+
+ /* Select HSI/2 as PLL source. */
+ rcc_set_pll_source(PLLSRC_HSI_CLK_DIV2);
+
+ rcc_set_pllxtpre(PLLXTPRE_HSE_CLK_DIV2);
+
+ /* Enable PLL oscillator and wait for it to stabilize. */
+ rcc_osc_on(PLL);
+ rcc_wait_for_osc_ready(PLL);
+
+ /* Select PLL as SYSCLK source. */
+ rcc_set_sysclk_source(SW_SYSCLKSEL_PLLCLK);
+}
+
+void gpio_setup(void)
+{
+ /* Enable GPIOC clock. */
+ rcc_peripheral_enable_clock(&RCC_APB2ENR, IOPCEN);
+
+ /* Set GPIO6 (in GPIO port C) to 'output push-pull'. */
+ gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO6 | GPIO7 | GPIO8 | GPIO9);
+}
+
+int main(void)
+{
+ int i;
+
+ clock_setup();
+ gpio_setup();
+
+ /* Blink the LED (PC12) on the board. */
+ gpio_set(GPIOC, GPIO6);
+ while (1) {
+ gpio_toggle(GPIOC, GPIO6); /* LED on/off */
+ gpio_toggle(GPIOC, GPIO7); /* LED on/off */
+ for (i = 0; i < 400000; i++); /* Wait (needs -O0 CFLAGS). */
+ gpio_toggle(GPIOC, GPIO7); /* LED on/off */
+ gpio_toggle(GPIOC, GPIO8); /* LED on/off */
+ for (i = 0; i < 400000; i++); /* Wait (needs -O0 CFLAGS). */
+ gpio_toggle(GPIOC, GPIO8); /* LED on/off */
+ gpio_toggle(GPIOC, GPIO9); /* LED on/off */
+ for (i = 0; i < 400000; i++); /* Wait (needs -O0 CFLAGS). */
+ gpio_toggle(GPIOC, GPIO8); /* LED on/off */
+ gpio_toggle(GPIOC, GPIO9); /* LED on/off */
+ for (i = 0; i < 400000; i++); /* Wait (needs -O0 CFLAGS). */
+ gpio_toggle(GPIOC, GPIO7); /* LED on/off */
+ gpio_toggle(GPIOC, GPIO8); /* LED on/off */
+ for (i = 0; i < 400000; i++); /* Wait (needs -O0 CFLAGS). */
+ gpio_toggle(GPIOC, GPIO6); /* LED on/off */
+ gpio_toggle(GPIOC, GPIO7); /* LED on/off */
+ for (i = 0; i < 400000; i++); /* Wait (needs -O0 CFLAGS). */
+ }
+
+ return 0;
+}
+
+u32 *vector_table[2] __attribute__ ((section(".vectors"))) = {
+ (u32 *) 0x20000800, /* Use 2 KB stack (0x800 bytes). */
+ (u32 *) main, /* Use main() as reset vector for now. */
+};