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cpu/atmega_common: misc gpio interrupt fixes

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This commit is contained in:
Matthew Blue 2018-06-28 16:06:36 -04:00
parent 1c47f9074c
commit adc44e6496
1 changed files with 8 additions and 5 deletions
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13
cpu/atmega_common/periph/gpio.c
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@ -150,6 +150,7 @@ int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
{
int8_t int_num = _int_num(pin);
/* mode not supported */
if ((mode != GPIO_IN) && (mode != GPIO_IN_PU)) {
return -1;
}
@ -159,19 +160,20 @@ int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
return -1;
}
/* flank not supported */
if (flank > GPIO_RISING) {
return -1;
}
gpio_init(pin, mode);
/* clear global interrupt flag */
cli();
/* enable interrupt number int_num */
EIFR |= (1 << int_num);
EIMSK |= (1 << int_num);
/* configure the flank */
if (flank > GPIO_RISING) {
return -1;
}
/* apply flank to interrupt number int_num */
if (int_num < 4) {
EICRA &= ~(0x3 << (int_num * 2));
@ -196,6 +198,7 @@ int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
void gpio_irq_enable(gpio_t pin)
{
EIFR |= (1 << _int_num(pin));
EIMSK |= (1 << _int_num(pin));
}