Remove SDCardStatusMessage, replace with Signal, extract to separate files.

firmware/application/sd_card.cpp

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ *
+ * This file is part of PortaPack.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "sd_card.hpp"
+
+#include <hal.h>
+
+#include "ff.h"
+
+namespace sd_card {
+
+namespace {
+
+bool card_present = false;
+
+FATFS fs;
+
+FRESULT mount() {
+	return f_mount(&fs, "", 0);
+}
+
+FRESULT unmount() {
+	return f_mount(NULL, "", 0);
+}
+
+} /* namespace */
+
+Signal<Status> status_signal;
+
+void poll_inserted() {
+	const auto card_present_now = sdc_lld_is_card_inserted(&SDCD1);
+	if( card_present_now != card_present ) {
+		card_present = card_present_now;
+
+		Status status { card_present ? Status::Present : Status::NotPresent };
+
+		if( card_present ) {
+			if( sdcConnect(&SDCD1) == CH_SUCCESS ) {
+				if( mount() == FR_OK ) {
+					status = Status::Mounted;
+				} else {
+					status = Status::MountError;
+				}
+			} else {
+				status = Status::ConnectError;
+			}
+		} else {
+			sdcDisconnect(&SDCD1);
+		}
+
+		status_signal.emit(status);
+	}
+}
+
+} /* namespace sd_card */