EMTime/libopencm3-examples
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This commit is contained in:
Frantisek Burian
2014-01-23 19:06:13 +01:00
parent 022cc475bf
commit 3f47411e24
22 changed files with 203 additions and 159 deletions
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14
examples/stm32/f4/stm32f4-discovery/tick_blink/tick_blink.c
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@@ -27,22 +27,22 @@
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/cm3/systick.h>
void msleep(uint32_t);
/* monotonically increasing number of milliseconds from reset
* overflows every 49 days if you're wondering
*/
volatile uint32_t system_millis;
/* Called when systick fires */
void sys_tick_handler(void) {
void sys_tick_handler(void)
{
system_millis++;
}
/* sleep for delay milliseconds */
void msleep(uint32_t delay) {
static void msleep(uint32_t delay)
{
uint32_t wake = system_millis + delay;
while (wake > system_millis) ;
while (wake > system_millis;
}
/* Set up a timer to create 1mS ticks. */
@@ -68,8 +68,8 @@ static void clock_setup(void)
static void gpio_setup(void)
{
/* Set GPIO11-15 (in GPIO port D) to 'output push-pull'. */
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,
GPIO_PUPD_NONE, GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
GPIO11 | GPIO12 | GPIO13 | GPIO14 | GPIO15);
}
int main(void)