Added support for MPLAB Snap debug tool

src/DebugToolDrivers/Microchip/MplabSnap/MplabSnap.cpp

@@ -0,0 +1,80 @@
+#include "MplabSnap.hpp"
+#include "src/Exceptions/Exception.hpp"
+
+using namespace Bloom::DebugToolDrivers;
+using namespace Protocols::CmsisDap::Edbg::Avr;
+using namespace Bloom::Exceptions;
+
+void MplabSnap::init() {
+    UsbDevice::init();
+
+    // TODO: Move away from hard-coding the CMSIS-DAP/EDBG interface number
+    auto& usbHidInterface = this->getEdbgInterface().getUsbHidInterface();
+    usbHidInterface.setNumber(0);
+    usbHidInterface.setLibUsbDevice(this->libUsbDevice);
+    usbHidInterface.setLibUsbDeviceHandle(this->libUsbDeviceHandle);
+    usbHidInterface.setVendorId(this->vendorId);
+    usbHidInterface.setProductId(this->productId);
+
+    if (!usbHidInterface.isInitialised()) {
+        usbHidInterface.init();
+    }
+
+    this->getEdbgInterface().setMinimumCommandTimeGap(35);
+
+    // We don't need to claim the CMSISDAP interface here as the HIDAPI will have already done so.
+    if (!this->sessionStarted) {
+        this->startSession();
+    }
+
+    this->edbgAvr8Interface = std::make_unique<EdbgAvr8Interface>(this->edbgInterface);
+    this->setInitialised(true);
+}
+
+void MplabSnap::close() {
+    if (this->sessionStarted) {
+        this->endSession();
+    }
+
+    this->getEdbgInterface().getUsbHidInterface().close();
+    UsbDevice::close();
+}
+
+std::string MplabSnap::getSerialNumber() {
+    auto response = this->getEdbgInterface().sendAvrCommandFrameAndWaitForResponseFrame(
+        CommandFrames::Discovery::Query(CommandFrames::Discovery::QueryContext::SERIAL_NUMBER)
+    );
+
+    if (response.getResponseId() != CommandFrames::Discovery::ResponseId::OK) {
+        throw Exception("Failed to fetch serial number from device - invalid Discovery Protocol response ID.");
+    }
+
+    auto data = response.getPayloadData();
+    return std::string(data.begin(), data.end());
+}
+
+void MplabSnap::startSession() {
+    auto response = this->getEdbgInterface().sendAvrCommandFrameAndWaitForResponseFrame(
+        CommandFrames::HouseKeeping::StartSession()
+    );
+
+    if (response.getResponseId() == CommandFrames::HouseKeeping::ResponseId::FAILED) {
+        // Failed response returned!
+        throw Exception("Failed to start session with MPLAB Snap!");
+    }
+
+    this->sessionStarted = true;
+}
+
+void MplabSnap::endSession() {
+    auto response = this->getEdbgInterface().sendAvrCommandFrameAndWaitForResponseFrame(
+        CommandFrames::HouseKeeping::EndSession()
+    );
+
+    if (response.getResponseId() == CommandFrames::HouseKeeping::ResponseId::FAILED) {
+        // Failed response returned!
+        throw Exception("Failed to end session with MPLAB Snap!");
+    }
+
+    this->sessionStarted = false;
+}