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Merge pull request #6315 from amq/efm32_faster_gpio_irq 

EFM32: make gpio interrupts faster by offloading expected pin state check to user
pull/6211/merge
Cruz Monrreal 2018-03-15 10:39:29 -05:00 committed by GitHub
parent 5523d53f83 82ecf7e81a
commit d05417a941
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1 changed files with 2 additions and 6 deletions
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8
targets/TARGET_Silicon_Labs/TARGET_EFM32/gpio_irq_api.c
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@ -61,15 +61,11 @@ static void handle_interrupt_in(uint8_t pin)
return;
}
//we are storing two ports in each uint8, so we must aquire the one we want.
// If pin is odd, the port is encoded in the 4 most significant bits. If pin is even, the port is encoded in the 4 least significant bits
uint8_t isRise = GPIO_PinInGet((pin & 0x1) ? channel_ports[(pin>>1) & 0x7] >> 4 & 0xF : channel_ports[(pin>>1) & 0x7] & 0xF, pin);
// Get trigger event
gpio_irq_event event = IRQ_NONE;
if ((GPIO->EXTIFALL & (1 << pin)) && !isRise) {
if (GPIO->EXTIFALL & (1 << pin)) {
event = IRQ_FALL;
} else if ((GPIO->EXTIRISE & (1 << pin)) && isRise) {
} else if (GPIO->EXTIRISE & (1 << pin)) {
event = IRQ_RISE;
}
GPIO_IntClear(pin);