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STM32: Store and restore rising falling config of gpio_irq 

Now that rising / falling edge detection is disabled in the
gpio_irq_disable function, we also need to restore it when gpio_irq_enable
gets called.
pull/4676/head
Laurent MEUNIER 2017-06-30 13:23:08 +02:00
parent 88770528bd
commit ade981dc9e
1 changed files with 14 additions and 1 deletions
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15
targets/TARGET_STM/gpio_irq_api.c
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@ -254,18 +254,23 @@ void gpio_irq_free(gpio_irq_t *obj)
void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
{
/* Enable / Disable Edge triggered interrupt and store event */
if (event == IRQ_RISE) {
if (enable) {
LL_EXTI_EnableRisingTrig_0_31(1 << STM_PIN(obj->pin));
obj->event |= IRQ_RISE;
} else {
LL_EXTI_DisableRisingTrig_0_31(1 << STM_PIN(obj->pin));
obj->event &= ~IRQ_RISE;
}
}
if (event == IRQ_FALL) {
if (enable) {
LL_EXTI_EnableFallingTrig_0_31(1 << STM_PIN(obj->pin));
obj->event |= IRQ_FALL;
} else {
LL_EXTI_DisableFallingTrig_0_31(1 << STM_PIN(obj->pin));
obj->event &= ~IRQ_FALL;
}
}
}
@ -284,6 +289,15 @@ void gpio_irq_enable(gpio_irq_t *obj)
LL_EXTI_EnableIT_0_31(1 << pin_index);
/* Restore previous edge interrupt configuration if applicable */
if (obj->event & IRQ_RISE) {
LL_EXTI_EnableRisingTrig_0_31(1 << STM_PIN(obj->pin));
}
if (obj->event & IRQ_FALL) {
LL_EXTI_EnableFallingTrig_0_31(1 << STM_PIN(obj->pin));
}
NVIC_EnableIRQ(obj->irq_n);
}
@ -295,5 +309,4 @@ void gpio_irq_disable(gpio_irq_t *obj)
LL_EXTI_DisableIT_0_31(1 << STM_PIN(obj->pin));
NVIC_DisableIRQ(obj->irq_n);
NVIC_ClearPendingIRQ(obj->irq_n);
obj->event = EDGE_NONE;
}