54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/* ESP8266 Xtensa interrupt management functions
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*
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*
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* Part of esp-open-rtos
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* Copyright (C) 2015 Angus Gratton
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* BSD Licensed as described in the file LICENSE
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*/
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#include <esp/interrupts.h>
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typedef struct _xt_isr_entry_ {
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_xt_isr handler;
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void *arg;
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} _xt_isr_entry;
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_xt_isr_entry isr[16];
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bool esp_in_isr;
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void IRAM _xt_isr_attach(uint8_t i, _xt_isr func, void *arg)
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{
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isr[i].handler = func;
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isr[i].arg = arg;
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}
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/* Generic ISR handler.
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Handles all flags set for interrupts in 'intset'.
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*/
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uint16_t IRAM _xt_isr_handler(uint16_t intset)
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{
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esp_in_isr = true;
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/* WDT has highest priority (occasional WDT resets otherwise) */
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if (intset & BIT(INUM_WDT)) {
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_xt_clear_ints(BIT(INUM_WDT));
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isr[INUM_WDT].handler(NULL);
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intset -= BIT(INUM_WDT);
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}
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while (intset) {
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uint8_t index = __builtin_ffs(intset) - 1;
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uint16_t mask = BIT(index);
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_xt_clear_ints(mask);
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_xt_isr handler = isr[index].handler;
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if (handler) {
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handler(isr[index].arg);
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}
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intset -= mask;
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}
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esp_in_isr = false;
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return 0;
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}
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