[test] Add STM32H7 BDMA and SPI6 hardware unit test

Only runs on Nucleo-H723ZG

Author: chris-durand

test/modm/platform/spi/stm32h7/module.lb

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2024, Christopher Durand
+#
+# 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/.
+
+
+def init(module):
+    module.name = ":test:platform:spi"
+    module.description = "STM32H7 SPI BDMA test"
+
+def prepare(module, options):
+    target = options[":target"]
+
+    identifier = target.identifier
+    if identifier.platform != "stm32" or identifier.family != "h7":
+        return False
+
+    module.depends(":platform:bdma", ":platform:dma", ":platform:spi:6")
+    return True
+
+def build(env):
+    if not env.has_module(":board:nucleo-h723zg"):
+        env.log.warn("The SPI test uses hardcoded GPIO pins."
+                     "Please make sure the pins are safe to use on other hardware.")
+        return
+
+    env.outbasepath = "modm-test/src/modm-test/platform/spi_test"
+    env.copy("spi_bdma_test.hpp")
+    env.copy("spi_bdma_test.cpp")

test/modm/platform/spi/stm32h7/spi_bdma_test.cpp

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2024, Christopher Durand
+ *
+ * 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 "spi_bdma_test.hpp"
+
+#include <modm/platform.hpp>
+#include <modm/board.hpp>
+
+using namespace modm::platform;
+
+using Spi = SpiMaster6_Dma<Bdma::Channel0, Bdma::Channel1>;
+using Miso = GpioA6;
+using Sck = GpioC12;
+
+void
+SpiBdmaTest::setUp()
+{
+	Bdma::enable();
+	Spi::connect<Miso::Miso, Sck::Sck>();
+	Spi::initialize<Board::SystemClock, 16_MHz, 10_pct>();
+}
+
+void
+SpiBdmaTest::testReceive()
+{
+	constexpr std::array<uint8_t, 4> ones{0xff, 0xff, 0xff, 0xff};
+	constexpr std::array<uint8_t, 4> zeros{};
+	modm_section(".data_d3_sram") static std::array<uint8_t, 4> buffer{};
+
+	Miso::configure(Miso::InputType::PullUp);
+	modm::delay_ns(500);
+	Spi::transferBlocking(nullptr, buffer.data(), buffer.size());
+	TEST_ASSERT_TRUE(buffer == ones);
+
+	Miso::configure(Miso::InputType::PullDown);
+	modm::delay_ns(500);
+	Spi::transferBlocking(nullptr, buffer.data(), buffer.size());
+	TEST_ASSERT_TRUE(buffer == zeros);
+
+	Miso::configure(Miso::InputType::PullUp);
+	modm::delay_ns(500);
+	Spi::transferBlocking(nullptr, buffer.data(), buffer.size());
+	TEST_ASSERT_TRUE(buffer == ones);
+
+	Miso::configure(Miso::InputType::Floating);
+}

test/modm/platform/spi/stm32h7/spi_bdma_test.hpp

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2024, Christopher Durand
+ *
+ * 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 <unittest/testsuite.hpp>
+
+/// @ingroup modm_test_test_platform_spi
+class SpiBdmaTest : public unittest::TestSuite
+{
+public:
+	void
+	setUp() override;
+
+	void
+	testReceive();
+};