From df843b044dcb6b1c992edca3a0b117d071b8ae28 Mon Sep 17 00:00:00 2001
From: Tomasz Wasilczyk <tomkiewi@gmail.com>
Date: Mon, 13 Sep 2021 12:02:27 -0700
Subject: [PATCH] Blinky example for SAMV

---
 examples/samv/blink/main.cpp    | 63 +++++++++++++++++++++++++++++++++
 examples/samv/blink/openocd.cfg |  9 +++++
 examples/samv/blink/project.xml | 15 ++++++++
 3 files changed, 87 insertions(+)
 create mode 100644 examples/samv/blink/main.cpp
 create mode 100644 examples/samv/blink/openocd.cfg
 create mode 100644 examples/samv/blink/project.xml

diff --git a/examples/samv/blink/main.cpp b/examples/samv/blink/main.cpp
new file mode 100644
index 0000000000..d1c824f872
--- /dev/null
+++ b/examples/samv/blink/main.cpp
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2021, Tomasz Wasilczyk
+ *
+ * This file is part of the modm project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <modm/architecture/interface/clock.hpp>
+#include <modm/platform.hpp>
+
+using namespace std::chrono_literals;
+using namespace modm::platform;
+
+struct SystemClock
+{
+	// Chosen to achieve 300MHz system clock
+	static constexpr uint32_t PllAMult = 25;
+	static constexpr uint32_t Frequency = 300'000'000;  // TODO: PllAMult * 12'000'000 (OSC12M);
+
+	static bool inline
+	enable()
+	{
+		ClockGen::setFlashLatency<Frequency>();  // TODO: what is this for?
+		ClockGen::updateCoreFrequency<Frequency>();
+
+		ClockGen::enableMainInternal<MainInternalFreq::Rc12Mhz>();
+		ClockGen::selectMainClockSource<MainClockSource::Internal>();
+		ClockGen::enablePllA<PllAMult>();
+		ClockGen::selectMasterClk<MasterClkSource::PLLA_CLK, MasterClkPrescaler::CLK_1>();
+
+		return true;
+	}
+};
+
+int
+main()
+{
+    WDT->WDT_MR = (WDT_MR_WDDIS_Msk);  // turn off Watchdog
+    SystemClock::enable();
+    SysTickTimer::initialize<SystemClock>();
+
+    using Led0 = modm::platform::GpioD17;
+    using Led1 = modm::platform::GpioD16;
+    using Led2 = modm::platform::GpioD15;
+    using DispDC = modm::platform::GpioD26;
+
+    Led0::setOutput(false);
+    Led1::setOutput(true);
+    Led2::setOutput(false);
+    DispDC::setOutput(false);
+
+    while (1)
+    {
+        Led0::toggle();
+        DispDC::toggle();
+        modm::delay(500ms);
+    }
+
+    return 0;
+}
diff --git a/examples/samv/blink/openocd.cfg b/examples/samv/blink/openocd.cfg
new file mode 100644
index 0000000000..a9b9337d7b
--- /dev/null
+++ b/examples/samv/blink/openocd.cfg
@@ -0,0 +1,9 @@
+source [find interface/jlink.cfg]
+transport select swd
+
+source [find target/atsamv.cfg]
+
+# Set boot mode selection to Flash (instead of SAM-BA on ROM)
+init
+halt
+atsamv gpnvm set 1
diff --git a/examples/samv/blink/project.xml b/examples/samv/blink/project.xml
new file mode 100644
index 0000000000..471cfbc581
--- /dev/null
+++ b/examples/samv/blink/project.xml
@@ -0,0 +1,15 @@
+<library>
+  <options>
+    <option name="modm:target">samv70n20b-aabt</option>
+    <option name="modm:build:build.path">../../../build/samv/blink</option>
+    <option name="modm:build:openocd.cfg">openocd.cfg</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:platform:core</module>
+    <module>modm:platform:clock</module>
+    <module>modm:platform:gpio</module>
+    <module>modm:architecture:delay</module>
+    <module>modm:platform:clockgen</module>
+  </modules>
+</library>