Merge pull request #6 from ciniml/cmsis-dap-v2

Add CMSIS-DAP v2 example

Author: Pillar1989

examples/daplink_v2/daplink_v2.ino

@@ -0,0 +1,141 @@
+/*
+ * daplink_v2.ino
+ * DAPLink with CMSIS-DAP v2 implementation for Seeed SAMD devices.
+ * Author: Kenta IDA
+ * This sketch is based on simple_daplink.ino sample sketch in the Seeed_Arduino_DAPLink library.
+ * The original license is below.
+ */
+/*
+ * Seeed_Arduino_DAPLink.ino
+ *
+ * Copyright (c) 2020 seeed technology co., ltd.  
+ * Author      : weihong.cai (weihong.cai@seeed.cc)  
+ * Create Time : Aug 2020
+ * Change Log  : 
+ *
+ * The MIT License (MIT)
+ *
+ * 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 istm
+ * 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 INcommInterface
+ * THE SOFTWARE.
+ *
+ * Get start:
+ * 1. For a device to be correctly detected as a CMSIS-DAP adapter, it must contain the string "CMSIS-DAP" in 
+ *    its USB product name. 
+ * 
+ * 2. Download the Adafruit TinyUSB Library from: https://github.com/adafruit/Adafruit_TinyUSB_Arduino.
+ *    And add it to your local arduino library.
+ * 3. Arduino IDE tool-->Select the board: Seeeduino Wio Terminal. 
+ * 4. Arduino IDE tool-->Select the USB Stack: TinyUSB. 
+ * 5. Arduino IDE tool-->Select the COM port. 
+ *
+ * WARNING:
+ *   This demo is just a test-demo. At present, it only enumerate a HID Device to communicate with host(PC).
+ *   But it can't work as a DAPLink adapter. I think that it need to deal with the problem of data interaction 
+ *   between host and device. If there is any progress, please tell to me.
+ *
+ */
+
+#include "Adafruit_TinyUSB.h"
+#include "DAP_config.h"
+#include "DAP.h"
+#include <stdint.h>
+#include <cassert>
+
+uint32_t baud;
+uint32_t old_baud;
+
+#define SerialTTL    Serial1
+
+#define EPOUT 0x00
+#define EPIN  0x80
+#define EPSIZE 64
+class CMSISDAPV2 : public Adafruit_USBD_Interface 
+{
+public:
+    CMSISDAPV2() {
+        this->setStringDescriptor("CMSIS-DAP interface");
+    }
+    virtual uint16_t getDescriptor(uint8_t itfnum, uint8_t* buf, uint16_t bufsize) override {
+        assert(buf != nullptr);
+        if( bufsize == 0 ) return 0;
+
+        uint8_t const intf_desc[] = {
+            TUD_VENDOR_DESCRIPTOR(itfnum, 0, EPOUT, EPIN, EPSIZE)
+        };
+        const uint16_t intf_desc_len = sizeof(intf_desc);
+
+        if( bufsize < intf_desc_len ) return 0;
+
+        memcpy(buf, intf_desc, intf_desc_len);
+        return intf_desc_len;
+    }
+};
+
+static CMSISDAPV2 cmsisdap_v2;
+
+extern "C" void tud_vendor_rx_cb(uint8_t itf)
+{
+    auto data_available = tud_vendor_available();
+    if( data_available > 0 ) {
+        uint8_t buffer[EPSIZE];
+        uint8_t response[EPSIZE];
+        auto bytes_received = tud_vendor_read(buffer, sizeof(buffer));
+        auto bytes_to_write = DAP_ExecuteCommand(buffer, response);
+        if( bytes_to_write > 0 ) {
+            tud_vendor_write(response, bytes_to_write);
+        }
+    }
+}
+
+void setup() {
+    USBDevice.setProductDescriptor("CMSIS-DAP");
+    USBDevice.addInterface(cmsisdap_v2);
+    
+    pinMode(LED_BUILTIN, OUTPUT);
+    
+    baud = old_baud = 115200;
+    Serial.begin(baud);
+    SerialTTL.begin(baud);
+
+    // wait until device mounted
+    while( !USBDevice.mounted() ) delay(1);
+    
+    DAP_Setup();
+}
+
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  baud = Serial.baud();
+  if (baud != old_baud) {
+    SerialTTL.begin(baud);
+    while (!SerialTTL);
+    old_baud = baud;
+  }
+
+  if (Serial.available() > 0)
+  {
+    char c = Serial.read();
+    SerialTTL.write(c);
+  }
+
+  if (SerialTTL.available() > 0) {
+    char c = SerialTTL.read();
+    Serial.write(c);
+  }
+}