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pcnt/driver: Sped the pcnt_intr_service ISR

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Used __builtin_ctz function to sped ISR.
This commit is contained in:
Konstantin Kondrashov
2019-02-07 21:18:19 +08:00
committed by bot
parent b8dc48ab18
commit 3307735bc0
1 changed files with 8 additions and 7 deletions
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11
components/driver/pcnt.c
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@@ -296,15 +296,16 @@ esp_err_t pcnt_isr_register(void (*fun)(void*), void * arg, int intr_alloc_flags
// pcnt interrupt service // pcnt interrupt service
static void IRAM_ATTR pcnt_intr_service(void* arg) static void IRAM_ATTR pcnt_intr_service(void* arg)
{ {
uint32_t intr_status = PCNT.int_st.val; const uint32_t intr_status = PCNT.int_st.val;
for (int unit = 0; unit < PCNT_UNIT_MAX; unit++) { uint32_t status = intr_status;
if (intr_status & (BIT(unit))) { while (status) {
int unit = __builtin_ffs(status) - 1;
status &= ~(1 << unit);
if (pcnt_isr_func[unit].fn != NULL) { if (pcnt_isr_func[unit].fn != NULL) {
(pcnt_isr_func[unit].fn)(pcnt_isr_func[unit].args); (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) esp_err_t pcnt_isr_handler_add(pcnt_unit_t unit, void(*isr_handler)(void *), void *args)