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https://github.com/espressif/esp-idf.git
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65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Unlicense OR CC0-1.0
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*/
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include "freertos/FreeRTOSConfig.h"
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#include "freertos/FreeRTOS.h"
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#include "sdkconfig.h"
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#include "driver/gpio.h"
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#include "hal/gpio_ll.h"
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#include "soc/interrupts.h"
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#include "example_gpio.h"
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extern volatile int nmi_triggered;
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extern void xt_nmi(void*);
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void app_main(void)
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{
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intr_handle_t handle;
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esp_err_t err;
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printf("example: Start\n");
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gpio_reset_pin(EXAMPLE_GPIO_IN);
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/* Make sure we have a pull-down on the input GPIO to prevent noise (when disconnected) */
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gpio_pulldown_en(EXAMPLE_GPIO_IN);
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gpio_set_direction(EXAMPLE_GPIO_IN, GPIO_MODE_INPUT_OUTPUT);
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/* Register the interrupt handler as an NMI. When registering high level interrupts,
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* the interrupt allocator expects the handler passed as an argument to be NULL. */
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err = esp_intr_alloc(ETS_GPIO_INTR_SOURCE, ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_NMI, NULL, NULL, &handle);
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if (err != ESP_OK) {
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printf("Failure: could not install NMI ISR, %d(0x%x)\n", err, err);
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return;
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}
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gpio_set_intr_type(EXAMPLE_GPIO_IN, GPIO_INTR_HIGH_LEVEL);
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gpio_intr_enable(EXAMPLE_GPIO_IN);
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vTaskDelay(200 / portTICK_PERIOD_MS);
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/* Disable interrupts on the CPU side and make sure the NMI is still triggered */
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const uint32_t mask = esp_cpu_intr_get_enabled_mask();
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esp_cpu_intr_disable(0xFFFFFFFF);
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nmi_triggered = 0;
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/* Setting EXAMPLE_GPIO_IN to 1 will trigger the NMI interrupt. */
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gpio_set_level(EXAMPLE_GPIO_IN, 1);
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/* Wait for the interrupt to occur */
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while (nmi_triggered == 0) {
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/* We cannot use vTaskDelay since the interrupts are disabled */
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}
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esp_cpu_intr_enable(mask);
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gpio_intr_disable(EXAMPLE_GPIO_IN);
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esp_intr_free(handle);
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printf("example: Success\n");
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}
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