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saml21/gpio: Allow multiple EXTI at the same time #6932

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Aug 28, 2017
Merged

saml21/gpio: Allow multiple EXTI at the same time #6932

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3 changes: 3 additions & 0 deletions cpu/saml21/periph/gpio.c
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Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,9 @@ int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
/* enable clocks for the EIC module */
MCLK->APBAMASK.reg |= MCLK_APBAMASK_EIC;
GCLK->PCHCTRL[EIC_GCLK_ID].reg = GCLK_PCHCTRL_CHEN | GCLK_PCHCTRL_GEN_GCLK0;
/* disable the EIC module*/
EIC->CTRLA.reg = 0;
while (EIC->SYNCBUSY.reg & EIC_SYNCBUSY_ENABLE) {}
/* configure the active flank */
EIC->CONFIG[exti >> 3].reg &= ~(0xf << ((exti & 0x7) * 4));
EIC->CONFIG[exti >> 3].reg |= (flank << ((exti & 0x7) * 4));
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