Clean up test code

Separate/consolidate board initialization code, and a few functions
that are shared across tests. Update the Makefile accordingly.

Resolves #18

firmware/Test/Apps/button.cpp

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2020  Max Regan
+ *
+ * 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 "Bsp/Drivers/GpioDriver.h"
+
+#include "Application/ButtonManager.h"
+
+#include "TestBoard.h"
+
+#include "printf.h"
+#include "test.h"
+
+using namespace BSP;
+
+using Button = ButtonManager::Button;
+using ButtonState = ButtonManager::ButtonState;
+
+static GpioPin g_btn_down(g_gpioa, 0);
+static GpioPin g_btn_mid(g_gpioa, 1);
+static GpioPin g_btn_up(g_gpioa, 2);
+
+static ButtonManager g_btn_mgr(g_sched,
+                               g_btn_down,
+                               g_btn_mid,
+                               g_btn_up,
+                               Time::millis(50));
+
+class IdleTask : public BSP::Schedule::Task {
+public:
+    IdleTask()
+    {}
+
+    BSP::Schedule::NextTime execute() override {
+        return BSP::Schedule::NextTime::asap();
+    }
+};
+
+static IdleTask g_idle;
+
+[[noreturn]] void main() {
+
+    board_init();
+
+    g_test_uart.tx_blocking(test_start_text);
+    
+    g_btn_down.configure_input(GpioDriver::input_pull_t::PULL_UP);
+    g_btn_mid.configure_input(GpioDriver::input_pull_t::PULL_UP);
+    g_btn_up.configure_input(GpioDriver::input_pull_t::PULL_UP);
+
+    g_btn_mgr.init();
+
+    ButtonManager::ChangeCallback callback =
+        [&](ButtonState state) {
+            g_test_uart.tx_blocking("up:");
+            if (state == ButtonState::PRESSED) {
+                g_test_uart.tx_blocking("pressed\r\n");
+            } else {
+                g_test_uart.tx_blocking("released\r\n");
+            }
+        };
+
+    g_btn_mgr.set_callback(Button::UP, callback);
+
+    Schedule::NextTime asap = Schedule::NextTime::asap();
+    g_sched.add_task(g_test_uart, asap);
+    g_sched.add_task(g_btn_mgr, asap);
+    g_sched.add_task(g_idle, asap);
+
+    g_test_uart.tx_blocking("Waiting for button press...\r\n");
+    g_sched.run();
+
+    TEST_SPIN();
+}