init

.envrc

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+source /home/pluc/esp/v5.5/esp-idf/export.sh
+export PORT="/dev/serial/by-id/usb-Espressif_USB_JTAG_serial_*"
+

CMakeLists.txt

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+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.22)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
+project(hello_world)

README.md

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+
+## Init
+
+    idf.py set-target esp32c2
+
+## Build and flash
+
+    idf.py build
+    idf.py -p /dev/serial/by-id/usb-Espressif* flash

main/CMakeLists.txt

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+idf_component_register(SRCS "hello_world_main.c"
+                       PRIV_REQUIRES spi_flash esp_driver_gpio
+                       INCLUDE_DIRS "")

main/hello_world_main.c

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+
+#include <stdio.h>
+#include <inttypes.h>
+#include "sdkconfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_chip_info.h"
+#include "esp_flash.h"
+#include "esp_system.h"
+#include "driver/gpio.h"
+
+#define LED_GPIO 15
+
+void app_main(void)
+{
+
+    gpio_config_t io_conf = {
+        .pin_bit_mask = LED_GPIO,
+        .mode = GPIO_MODE_OUTPUT,
+        .pull_up_en = GPIO_PULLUP_DISABLE,
+        .pull_down_en = GPIO_PULLDOWN_DISABLE,
+        .intr_type = GPIO_INTR_DISABLE, // No interrupt for now
+    };
+
+    esp_err_t ret = gpio_config(&io_conf);
+
+    while(1) {
+        printf("hello");
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+        gpio_set_level(LED_GPIO, 1);
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+        gpio_set_level(LED_GPIO, 0);
+    }
+}

sdkconfig.defaults

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+CONFIG_ESP_CONSOLE_USB_CDC=y