WIP: usb host lib

lib/SerialUSBHost/include/SerialUSBHost.h

@@ -17,11 +17,16 @@
 #include <Arduino.h>
 
 
-class SerialUSBHost
-{
+class SerialUSBHost {
+
 public:
-    SerialUSBHost(/* args */);
-    SemaphoreHandle_t device_disconnected_sem;
+    SerialUSBHost() = delete;
+    static void init();
+
+    static void handle_event(const cdc_acm_host_dev_event_data_t *event, void *user_ctx);
+    static bool handle_rx(const uint8_t *data, size_t data_len, void *arg);
+
+    static void takeSem();//XXX
 private:
     /**
      * @brief USB Host library handling task

lib/SerialUSBHost/src/SerialUSBHost.cpp

@@ -1,7 +1,53 @@
 #include "../include/SerialUSBHost.h"
 
 
+static SemaphoreHandle_t device_disconnected_sem;//XXX
 
+static const char *TAG = "VCP example";
+
+/**
+ * @brief Data received callback
+ *
+ * Just pass received data to stdout
+ *
+ * @param[in] data     Pointer to received data
+ * @param[in] data_len Length of received data in bytes
+ * @param[in] arg      Argument we passed to the device open function
+ * @return
+ *   true:  We have processed the received data
+ *   false: We expect more data
+ */
+bool SerialUSBHost::handle_rx(const uint8_t *data, size_t data_len, void *arg)
+{
+    printf("%.*s", data_len, data);
+    return true;
+}
+
+/**
+ * @brief Device event callback
+ *
+ * Apart from handling device disconnection it doesn't do anything useful
+ *
+ * @param[in] event    Device event type and data
+ * @param[in] user_ctx Argument we passed to the device open function
+ */
+void SerialUSBHost::handle_event(const cdc_acm_host_dev_event_data_t *event, void *user_ctx)
+{
+    switch (event->type) {
+        case CDC_ACM_HOST_ERROR:
+            ESP_LOGE(TAG, "CDC-ACM error has occurred, err_no = %d", event->data.error);
+            break;
+        case CDC_ACM_HOST_DEVICE_DISCONNECTED:
+            ESP_LOGI(TAG, "Device suddenly disconnected");
+            xSemaphoreGive(device_disconnected_sem);
+            break;
+        case CDC_ACM_HOST_SERIAL_STATE:
+            ESP_LOGI(TAG, "Serial state notif 0x%04X", event->data.serial_state.val);
+            break;
+        case CDC_ACM_HOST_NETWORK_CONNECTION:
+        default: break;
+    }
+}
 
 void SerialUSBHost::usb_lib_task(void* arg) {
     const String TAG = "SerialUSBHost_usb_lib_task";
@@ -19,11 +65,9 @@ void SerialUSBHost::usb_lib_task(void* arg) {
     }
 }
 
-
-
-SerialUSBHost::SerialUSBHost() {
+void SerialUSBHost::init() {
     const String TAG = "SerialUSBHost_constructor";
-    this->device_disconnected_sem = xSemaphoreCreateBinary();
+    device_disconnected_sem = xSemaphoreCreateBinary();
     assert(device_disconnected_sem);
 
     // Install USB Host driver. Should only be called once in entire application
@@ -48,3 +92,8 @@ SerialUSBHost::SerialUSBHost() {
     esp_usb::VCP::register_driver<esp_usb::CH34x>();
 
 }
+
+
+void SerialUSBHost::takeSem(){//XXX
+    xSemaphoreTake(device_disconnected_sem, portMAX_DELAY);
+}