Hi,
i develop my product ny ncs V2.6.0. when i view the code
static int callback_ctrl(uint32_t enable_mask)
{
int err = 0;
/* Normally this should be done with irqs disabled to avoid pin callback
* being fired before others are still not activated.
* Since we defer the handling code to work we can however assume
* cancel executed after callbacks maintenance will keep things safe.
*
* Note that this code MUST be executed from a system workqueue context.
*
* We are also safe to access state without a lock as long as it is
* done only from system workqueue context.
*/
for (size_t i = 0; (i < ARRAY_SIZE(row)) && !err; i++)
{
if (enable_mask & BIT(i))
{
/* Level interrupt is needed to leave deep sleep mode.
* Edge interrupt gives only 7 channels. It is not
* suitable for larger matrix/number of GPIO buttons.
*/
gpio_flags_t flag_irq = (IS_ENABLED(CONFIG_CAF_BUTTONS_POLARITY_INVERSED) ?
(GPIO_INT_LEVEL_LOW) : (GPIO_INT_LEVEL_HIGH));
err = gpio_pin_interrupt_configure(gpio_devs[row[i].port],
row[i].pin,
flag_irq);
}
else
{
err = gpio_pin_interrupt_configure(gpio_devs[row[i].port],
row[i].pin,
GPIO_INT_DISABLE);
}
}
if (!enable_mask) {
/* Callbacks are disabled but they could fire in the meantime.
* Make sure pending work is canceled.
*/
k_work_cancel_delayable(&button_pressed);
}
return err;
}
I noticed the annotation, it says “Edge interrupt gives only 7 channels. It is not suitable for larger matrix/number of GPIO buttons.” so why it only 7 channels，and if there is 15 pin need to set interrupt pin in my key matrix, how can i slove thie problem?
