pcnt/driver: Sped the pcnt_intr_service ISR
Used __builtin_ctz function to sped ISR.
@@ -296,15 +296,16 @@ esp_err_t pcnt_isr_register(void (*fun)(void*), void * arg, int intr_alloc_flags
// pcnt interrupt service
static void IRAM_ATTR pcnt_intr_service(void* arg)
{
- uint32_t intr_status = PCNT.int_st.val;
- for (int unit = 0; unit < PCNT_UNIT_MAX; unit++) {
- if (intr_status & (BIT(unit))) {
+ const uint32_t intr_status = PCNT.int_st.val;
+ uint32_t status = intr_status;
+ while (status) {
+ int unit = __builtin_ffs(status) - 1;
+ status &= ~(1 << unit);
if (pcnt_isr_func[unit].fn != NULL) {
(pcnt_isr_func[unit].fn)(pcnt_isr_func[unit].args);
}
- PCNT.int_clr.val = BIT(unit);
- }
}
+ PCNT.int_clr.val = intr_status;
}
esp_err_t pcnt_isr_handler_add(pcnt_unit_t unit, void(*isr_handler)(void *), void *args)
