cpp #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "driver/gpio.h" #include "esp_log.h" #define EXAMPLE_PIN_NUM CONFIG_EXAMPLE_PIN_NUMBER // 选择一个GPIO引脚 #define EXAMPLE_PIN_INTR_GPIO GPIO_INTR_NEGEDGE // 设置中断触发模式为下降沿触发 static const char *TAG =...
The digital signal is being measured in this application example by using an external interrupt pin + a Timer module. On the first rising edge, an interrupt occurs, so the CPU suspends the main program execution and starts a timer module, and then it resumes the main program. On the next ...
Left the line commented as an example of how to configure peripherals.The line below turns off ...
#include <stdint.h> #define EXTERNAL_NUM_INTERRUPTS 46 #define NUM_DIGITAL_PINS 48 #define NUM_ANALOG_INPUTS 20 #define analogInputToDigitalPin(p) (((p)<20)?(esp32_adc2gpio[(p)]):-1) #define digitalPinToInterrupt(p) (((p)<48)?(p):-1) #define digitalPinHasPWM(p) (p < 46)...
1 /* Hello World Example 2 3 This example code is in the Public Domain (or CC0 licensed, at your option.) 4 5 Unless required by applicable law or agreed to in writing, this 6 software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR ...
Except for GPIO6 to GPIO11, all GPIO pins of the ESP32 can be used as an external interrupt. This means any change of state in any of these pins can trigger an interrupt provided that the attachInterrupt() function in Arduino has been enabled. Strapping GPIO Pins Strapping pins play a ...
Start by configuring the wake up resource. In other words, define what source will wake up ESP32 from a deep sleep. As you may know that ESP32 supports multiple sources such as timer, external interrupt, and touch pins. We can use any one of them or a combination of these. We will ...
h> #define EXTERNAL_NUM_INTERRUPTS 16 #define NUM_DIGITAL_PINS 40 #define NUM_ANALOG_INPUTS 16 #define analogInputToDigitalPin(p) (((p)<20)?(esp32_adc2gpio[(p)]):-1) #define digitalPinToInterrupt(p) (((p)<40)?(p):-1) #define digitalPinHasPWM(p) (p < 34) static const ...
This means you’ll have your own WiFi network and no need for an external router to connect your devices. Other devices (stations) can easily connect to the ESP32’s network and communicate with it. For example, you can use ESP32 in Access Point mode to create a local network that ...
static esp_flash_t* example_init_ext_flash(void) { const spi_bus_config_t bus_config = { .mosi_io_num = VSPI_IOMUX_PIN_NUM_MOSI, .miso_io_num = VSPI_IOMUX_PIN_NUM_MISO, .sclk_io_num = VSPI_IOMUX_PIN_NUM_CLK, .quadwp_io_num = -1, .quadhd_io_num = -1, }; const ...