prep v3 firmware

FW/leo_muziekdoos_esp32S2/src/CMakeLists.txt

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+# This file was automatically generated for projects
+# without default 'CMakeLists.txt' file.
+
+FILE(GLOB_RECURSE app_sources ${CMAKE_SOURCE_DIR}/src/*.*)
+
+idf_component_register(SRCS ${app_sources})

FW/leo_muziekdoos_esp32S2/src/main.c

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+/* USB Example
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+// DESCRIPTION:
+// This example contains minimal code to make ESP32-S2 based device
+// recognizable by USB-host devices as a USB Serial Device.
+
+#include <stdint.h>
+#include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "tinyusb.h"
+#include "tusb_cdc_acm.h"
+#include "sdkconfig.h"
+
+static const char *TAG = "example";
+static uint8_t buf[CONFIG_TINYUSB_CDC_RX_BUFSIZE + 1];
+
+void tinyusb_cdc_rx_callback(int itf, cdcacm_event_t *event)
+{
+    /* initialization */
+    size_t rx_size = 0;
+
+    /* read */
+    esp_err_t ret = tinyusb_cdcacm_read(itf, buf, CONFIG_TINYUSB_CDC_RX_BUFSIZE, &rx_size);
+    if (ret == ESP_OK) {
+        buf[rx_size] = '\0';
+        ESP_LOGI(TAG, "Got data (%d bytes): %s", rx_size, buf);
+    } else {
+        ESP_LOGE(TAG, "Read error");
+    }
+
+    /* write back */
+    tinyusb_cdcacm_write_queue(itf, buf, rx_size);
+    tinyusb_cdcacm_write_flush(itf, 0);
+}
+
+void tinyusb_cdc_line_state_changed_callback(int itf, cdcacm_event_t *event)
+{
+    int dtr = event->line_state_changed_data.dtr;
+    int rst = event->line_state_changed_data.rts;
+    ESP_LOGI(TAG, "Line state changed! dtr:%d, rst:%d", dtr, rst);
+}
+
+void app_main(void)
+{
+    ESP_LOGI(TAG, "USB initialization");
+    tinyusb_config_t tusb_cfg = {}; // the configuration using default values
+    ESP_ERROR_CHECK(tinyusb_driver_install(&tusb_cfg));
+
+    tinyusb_config_cdcacm_t amc_cfg = {
+        .usb_dev = TINYUSB_USBDEV_0,
+        .cdc_port = TINYUSB_CDC_ACM_0,
+        .rx_unread_buf_sz = 64,
+        .callback_rx = &tinyusb_cdc_rx_callback, // the first way to register a callback
+        .callback_rx_wanted_char = NULL,
+        .callback_line_state_changed = NULL,
+        .callback_line_coding_changed = NULL
+    };
+
+    ESP_ERROR_CHECK(tusb_cdc_acm_init(&amc_cfg));
+    /* the second way to register a callback */
+    ESP_ERROR_CHECK(tinyusb_cdcacm_register_callback(
+                        TINYUSB_CDC_ACM_0,
+                        CDC_EVENT_LINE_STATE_CHANGED,
+                        &tinyusb_cdc_line_state_changed_callback));
+    ESP_LOGI(TAG, "USB initialization DONE");
+}