SerialUSBHost Lib WIP

lib/SerialUSBHost/include/SerialUSBHost.h

@@ -0,0 +1,37 @@
+#ifndef SERIAL_USB_HOST_H
+#define SERIAL_USB_HOST_H
+
+#include "esp_log.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include "freertos/task.h"
+
+#include "usb/cdc_acm_host.h"
+#include "usb/vcp_ch34x.hpp"
+#include "usb/vcp_cp210x.hpp"
+#include "usb/vcp_ftdi.hpp"
+#include "usb/vcp.hpp"
+#include "usb/usb_host.h"
+
+#include <Arduino.h>
+
+
+class SerialUSBHost
+{
+public:
+    SerialUSBHost(/* args */);
+    SemaphoreHandle_t device_disconnected_sem;
+private:
+    /**
+     * @brief USB Host library handling task
+     * 
+     * @param arg unused but required for task
+     */
+    static void usb_lib_task(void* arg);
+};
+
+
+
+
+#endif

lib/SerialUSBHost/src/SerialUSBHost.cpp

@@ -0,0 +1,50 @@
+#include "../include/SerialUSBHost.h"
+
+
+
+
+void SerialUSBHost::usb_lib_task(void* arg) {
+    const String TAG = "SerialUSBHost_usb_lib_task";
+    while (1) {
+        // Start handling system events
+        uint32_t event_flags;
+        usb_host_lib_handle_events(portMAX_DELAY, &event_flags);
+        if (event_flags & USB_HOST_LIB_EVENT_FLAGS_NO_CLIENTS) {
+            ESP_ERROR_CHECK(usb_host_device_free_all());
+        }
+        if (event_flags & USB_HOST_LIB_EVENT_FLAGS_ALL_FREE) {
+            ESP_LOGI(TAG.c_str(), "USB: All devices freed");
+            // Continue handling USB events to allow device reconnection
+        }
+    }
+}
+
+
+
+SerialUSBHost::SerialUSBHost() {
+    const String TAG = "SerialUSBHost_constructor";
+    this->device_disconnected_sem = xSemaphoreCreateBinary();
+    assert(device_disconnected_sem);
+
+    // Install USB Host driver. Should only be called once in entire application
+    ESP_LOGI(TAG.c_str(), "Installing USB Host");
+    const usb_host_config_t host_config = {
+        .skip_phy_setup = false,
+        .intr_flags = ESP_INTR_FLAG_LEVEL1,
+        .enum_filter_cb = nullptr,
+    };
+    ESP_ERROR_CHECK(usb_host_install(&host_config));
+
+    // Create a task that will handle USB library events
+    BaseType_t task_created = xTaskCreate(SerialUSBHost::usb_lib_task, "usb_lib", 4096, NULL, 10, NULL);
+    assert(task_created == pdTRUE);
+
+    ESP_LOGI(TAG.c_str(), "Installing CDC-ACM driver");
+    ESP_ERROR_CHECK(cdc_acm_host_install(NULL));
+
+    // Register VCP drivers to VCP service
+    esp_usb::VCP::register_driver<esp_usb::FT23x>();
+    esp_usb::VCP::register_driver<esp_usb::CP210x>();
+    esp_usb::VCP::register_driver<esp_usb::CH34x>();
+
+}