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STM32: Disabling of IRQs shared by multiple events 

Discern if an IRQ is being shared by multiple events and only disable the IRQ if no events are using it.
pull/8037/head
mattbrown015 2018-09-07 14:48:02 +01:00
parent acb59c4538
commit 792cec773e
1 changed files with 17 additions and 7 deletions
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24
targets/TARGET_STM/gpio_irq_api.c
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@ -27,7 +27,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
******************************************************************************* *******************************************************************************
*/ */
#include <stddef.h> #include <stdbool.h>
#include "cmsis.h" #include "cmsis.h"
#include "gpio_irq_api.h" #include "gpio_irq_api.h"
#include "pinmap.h" #include "pinmap.h"
@ -268,11 +268,11 @@ void gpio_irq_free(gpio_irq_t *obj)
uint32_t gpio_idx = pin_lines_desc[STM_PIN(obj->pin)].gpio_idx; uint32_t gpio_idx = pin_lines_desc[STM_PIN(obj->pin)].gpio_idx;
gpio_channel_t *gpio_channel = &channels[obj->irq_index]; gpio_channel_t *gpio_channel = &channels[obj->irq_index];
gpio_irq_disable(obj);
gpio_channel->pin_mask &= ~(1 << gpio_idx); gpio_channel->pin_mask &= ~(1 << gpio_idx);
gpio_channel->channel_ids[gpio_idx] = 0; gpio_channel->channel_ids[gpio_idx] = 0;
gpio_channel->channel_gpio[gpio_idx] = 0; gpio_channel->channel_gpio[gpio_idx] = 0;
gpio_channel->channel_pin[gpio_idx] = 0; gpio_channel->channel_pin[gpio_idx] = 0;
gpio_irq_disable(obj);
} }
void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
@ -325,10 +325,20 @@ void gpio_irq_enable(gpio_irq_t *obj)
void gpio_irq_disable(gpio_irq_t *obj) void gpio_irq_disable(gpio_irq_t *obj)
{ {
const uint32_t pin_index = STM_PIN(obj->pin);
const uint32_t gpio_idx = pin_lines_desc[pin_index].gpio_idx;
const uint32_t pin_mask = 1 << gpio_idx;
const uint32_t irq_index = pin_lines_desc[pin_index].irq_index;
const gpio_channel_t *const gpio_channel = &channels[irq_index];
/* Clear EXTI line configuration */ /* Clear EXTI line configuration */
LL_EXTI_DisableRisingTrig_0_31(1 << STM_PIN(obj->pin)); LL_EXTI_DisableRisingTrig_0_31(1 << pin_index);
LL_EXTI_DisableFallingTrig_0_31(1 << STM_PIN(obj->pin)); LL_EXTI_DisableFallingTrig_0_31(1 << pin_index);
LL_EXTI_DisableIT_0_31(1 << STM_PIN(obj->pin)); LL_EXTI_DisableIT_0_31(1 << pin_index);
NVIC_DisableIRQ(obj->irq_n);
NVIC_ClearPendingIRQ(obj->irq_n); const bool no_more_pins_on_vector = (gpio_channel->pin_mask & ~pin_mask) == 0;
if (no_more_pins_on_vector) {
NVIC_DisableIRQ(obj->irq_n);
NVIC_ClearPendingIRQ(obj->irq_n);
}
} }