87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
#include <Arduino.h>
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#include <gpio_api.h>
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#include <gpio_irq_api.h>
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#include <gpio_irq_ex_api.h>
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extern void *gpio_pin_struct[PINS_COUNT];
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static void *gpio_irq_handler_list[PINS_COUNT] = {NULL};
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static void *gpio_irq_handler_args[PINS_COUNT] = {NULL};
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extern bool pinInvalid(pin_size_t pinNumber);
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extern void pinRemoveMode(pin_size_t pinNumber);
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void gpioIrqHandler(uint32_t id, gpio_irq_event event) {
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if (gpio_irq_handler_list[id] != NULL) {
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if (gpio_irq_handler_args[id] != NULL)
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((voidFuncPtr)gpio_irq_handler_list[id])();
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else
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((voidFuncPtrParam)gpio_irq_handler_list[id])(gpio_irq_handler_args[id]);
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}
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}
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void attachInterrupt(pin_size_t interruptNumber, voidFuncPtr callback, PinStatus mode) {
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attachInterruptParam(interruptNumber, callback, mode, NULL);
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}
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void attachInterruptParam(pin_size_t interruptNumber, voidFuncPtrParam callback, PinStatus mode, void *param) {
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if (pinInvalid(interruptNumber))
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return;
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gpio_irq_handler_list[interruptNumber] = callback;
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gpio_irq_handler_args[interruptNumber] = param;
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if (pinTable[interruptNumber].enabled == PIN_IRQ && pinTable[interruptNumber].mode == mode)
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// Nothing changes in pin mode
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return;
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if (pinTable[interruptNumber].enabled != PIN_IRQ)
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// pin mode changes; deinit gpio and free memory
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pinRemoveMode(interruptNumber);
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gpio_irq_t *gpio;
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if (pinTable[interruptNumber].enabled == PIN_NONE) {
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// allocate memory if pin not used before
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gpio = malloc(sizeof(gpio_irq_t));
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gpio_pin_struct[interruptNumber] = gpio;
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gpio_irq_init(gpio, pinTable[interruptNumber].gpio, gpioIrqHandler, interruptNumber);
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pinTable[interruptNumber].enabled = PIN_IRQ;
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} else {
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// pin already used as irq
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gpio = (gpio_irq_t *)gpio_pin_struct[interruptNumber];
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}
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pinTable[interruptNumber].mode = mode;
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gpio_irq_event event;
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switch (mode) {
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case LOW:
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event = IRQ_LOW;
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break;
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case HIGH:
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event = IRQ_HIGH;
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break;
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case FALLING:
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event = IRQ_FALL;
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break;
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case RISING:
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event = IRQ_RISE;
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break;
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default:
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return;
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}
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gpio_irq_set(gpio, event, 1);
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gpio_irq_enable(gpio);
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}
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void detachInterrupt(pin_size_t interruptNumber) {
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if (pinInvalid(interruptNumber))
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return;
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if (pinTable[interruptNumber].enabled == PIN_IRQ) {
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pinRemoveMode(interruptNumber);
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}
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gpio_irq_handler_list[interruptNumber] = NULL;
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}
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