EMTime/libopencm3
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other/*: Random coding-style fixes.

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This commit is contained in:
Uwe Hermann
2011-11-13 09:13:27 +01:00
parent 8a77630997
commit 7f1e75c3a8
6 changed files with 101 additions and 94 deletions
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36
examples/stm32/f1/other/timer_interrupt/timer.c
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@@ -35,51 +35,51 @@ void gpio_setup(void)
GPIO_CNF_OUTPUT_PUSHPULL, GPIO7);
}
void nvic_setup()
void nvic_setup(void)
{
/* without this the timer interrupt routine will never be called */
/* Without this the timer interrupt routine will never be called. */
nvic_enable_irq(NVIC_TIM2_IRQ);
nvic_set_priority(NVIC_TIM2_IRQ, 1);
nvic_set_priority(NVIC_TIM2_IRQ, 1);
}
void tim2_isr()
void tim2_isr(void)
{
/* LED2 on/off */
gpio_toggle(GPIOB, GPIO6);
/* clear interrrupt flag */
TIM_SR(TIM2) &= ~TIM_SR_UIF;
gpio_toggle(GPIOB, GPIO6); /* LED2 on/off. */
TIM_SR(TIM2) &= ~TIM_SR_UIF; /* Clear interrrupt flag. */
}
int main(void)
{
rcc_clock_setup_in_hse_16mhz_out_72mhz();
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 */
/*
* The goal is to let the LED2 glow for a second and then be
* off for a second.
*/
/* Set timer start value */
/* Set timer start value. */
TIM_CNT(TIM2) = 1;
/* Set timer prescaler. 72MHz/1440 => 50000 counts per second */
/* 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 */
/* End timer value. If this is reached an interrupt is generated. */
TIM_ARR(TIM2) = 50000;
/* Update interrupt enable */
/* Update interrupt enable. */
TIM_DIER(TIM2) |= TIM_DIER_UIE;
/* Start timer */
/* Start timer. */
TIM_CR1(TIM2) |= TIM_CR1_CEN;
while(1); /* Halt. */
while (1); /* Halt. */
return 0;
}