[cdcserial][usb] Add a CDC-Serial USB Class Driver.

2 files changed, 71 insertions, 0 deletions

diff --git a/app/cdcserialtest/cdcserialtest.c b/app/cdcserialtest/cdcserialtest.c
new file mode 100644
index 00000000..98e52179
--- /dev/null
+++ b/app/cdcserialtest/cdcserialtest.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2016 Google Inc. All Rights Reserved.
+ * Author: gkalsi@google.com (Gurjant Kalsi)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <app.h>
+#include <err.h>
+#include <dev/usb/class/cdcserial.h>
+#include <kernel/thread.h>
+
+static uint8_t rxbuf[64];
+
+static void cdctest_init(const struct app_descriptor *app)
+{
+}
+
+// Read bytes from CDC Serial and write them back to the stream.
+static void cdctest_entry(const struct app_descriptor *app, void *args)
+{
+    while (true) {
+        ssize_t bytes = cdcserial_read(sizeof(rxbuf), rxbuf);
+        if (bytes == ERR_NOT_READY) {
+            // USB is not ready yet.
+            thread_sleep(100);
+            continue;
+        } else if (bytes < 0) {
+            printf("Error reading bytes from CDC Serial: %ld\n", bytes);
+            break;
+        }
+
+        cdcserial_write(bytes, rxbuf);
+    }
+}
+
+APP_START(usbtest)
+ .init = cdctest_init,
+ .entry = cdctest_entry,
+APP_END
diff --git a/app/cdcserialtest/rules.mk b/app/cdcserialtest/rules.mk
new file mode 100644
index 00000000..c66f9ca3
--- /dev/null
+++ b/app/cdcserialtest/rules.mk
@@ -0,0 +1,14 @@
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+MODULE := $(LOCAL_DIR)
+
+MODULE_DEPS += \
+    dev/usb \
+    dev/usb/class/cdcserial \
+
+
+MODULE_SRCS += \
+	$(LOCAL_DIR)/cdcserialtest.c \
+
+include make/module.mk
+