Move STM32 example projects in family specific folders

2011-10-31 00:16:37 -04:00
parent 68d2e0d1e3
commit 580d25a84b
185 changed files with 8 additions and 8 deletions
--- a/examples/stm32/f1/other/timer_interrupt/timer.c
+++ b/examples/stm32/f1/other/timer_interrupt/timer.c
@@ -0,0 +1,85 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.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/f1/rcc.h>
+#include <libopencm3/stm32/f1/flash.h>
+#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/timer.h>
+#include <libopencm3/stm32/nvic.h>
+
+void gpio_setup(void)
+{
+	/* Enable GPIOB clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
+
+	/* Set GPIO6/7 (in GPIO port B) to 'output push-pull' for the LEDs. */
+	gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
+	              GPIO_CNF_OUTPUT_PUSHPULL, GPIO6);
+	gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
+	              GPIO_CNF_OUTPUT_PUSHPULL, GPIO7);
+}
+
+void nvic_setup()
+{
+	/* without this the timer interrupt routine will never be called */
+	nvic_enable_irq(NVIC_TIM2_IRQ);
+	nvic_set_priority(NVIC_TIM2_IRQ, 1);	
+}
+
+void tim2_isr()
+{
+	/* LED2 on/off */
+	gpio_toggle(GPIOB, GPIO6);
+
+	/* clear interrrupt flag */
+	TIM_SR(TIM2) &= ~TIM_SR_UIF;
+}
+
+int main(void)
+{
+        rcc_clock_setup_in_hse_16mhz_out_72mhz();
+	gpio_setup();
+	nvic_setup();
+
+	gpio_clear(GPIOB, GPIO7);	/* LED1 on */
+	gpio_set(GPIOB, GPIO6);		/* LED2 off */
+	
+	rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_TIM2EN);
+
+	/* the goal is to let the LED2 glow for a second and then be off for a second */	
+
+	/* Set timer start value */
+	TIM_CNT(TIM2) = 1;
+
+	/* Set timer prescaler. 72MHz/1440 => 50000 counts per second */
+	TIM_PSC(TIM2) = 1440;
+
+	/* End timer value. If this value is reached an interrupt is generated */
+	TIM_ARR(TIM2) = 50000;
+
+	/* Update interrupt enable */
+	TIM_DIER(TIM2) |= TIM_DIER_UIE;
+
+	/* Start timer */
+	TIM_CR1(TIM2) |= TIM_CR1_CEN;
+
+	while(1); /* Halt. */
+
+	return 0;
+}