Add exFAT support (#150)

## Summary

* Swap to updated SDCardManager which uses SdFat
* Add exFAT support
  * Swap to using FsFile everywhere
* Use newly exposed `SdMan` macro to get to static instance of
SDCardManager
* Move a bunch of FsHelpers up to SDCardManager

src/activities/reader/EpubReaderActivity.cpp

@@ -3,12 +3,13 @@
 #include <Epub/Page.h>
 #include <FsHelpers.h>
 #include <GfxRenderer.h>
-#include <InputManager.h>
+#include <SDCardManager.h>
 
 #include "Battery.h"
 #include "CrossPointSettings.h"
 #include "CrossPointState.h"
 #include "EpubReaderChapterSelectionActivity.h"
+#include "MappedInputManager.h"
 #include "config.h"
 
 namespace {
@@ -54,8 +55,8 @@ void EpubReaderActivity::onEnter() {
 
   epub->setupCacheDir();
 
-  File f;
-  if (FsHelpers::openFileForRead("ERS", epub->getCachePath() + "/progress.bin", f)) {
+  FsFile f;
+  if (SdMan.openFileForRead("ERS", epub->getCachePath() + "/progress.bin", f)) {
     uint8_t data[4];
     if (f.read(data, 4) == 4) {
       currentSpineIndex = data[0] + (data[1] << 8);
@@ -346,8 +347,8 @@ void EpubReaderActivity::renderScreen() {
     Serial.printf("[%lu] [ERS] Rendered page in %dms\n", millis(), millis() - start);
   }
 
-  File f;
-  if (FsHelpers::openFileForWrite("ERS", epub->getCachePath() + "/progress.bin", f)) {
+  FsFile f;
+  if (SdMan.openFileForWrite("ERS", epub->getCachePath() + "/progress.bin", f)) {
     uint8_t data[4];
     data[0] = currentSpineIndex & 0xFF;
     data[1] = (currentSpineIndex >> 8) & 0xFF;

src/activities/reader/EpubReaderChapterSelectionActivity.cpp

@@ -1,9 +1,8 @@
 #include "EpubReaderChapterSelectionActivity.h"
 
 #include <GfxRenderer.h>
-#include <InputManager.h>
-#include <SD.h>
 
+#include "MappedInputManager.h"
 #include "config.h"
 
 namespace {

src/activities/reader/FileSelectionActivity.cpp

@@ -1,9 +1,9 @@
 #include "FileSelectionActivity.h"
 
 #include <GfxRenderer.h>
-#include <InputManager.h>
-#include <SD.h>
+#include <SDCardManager.h>
 
+#include "MappedInputManager.h"
 #include "config.h"
 
 namespace {
@@ -30,17 +30,19 @@ void FileSelectionActivity::taskTrampoline(void* param) {
 void FileSelectionActivity::loadFiles() {
   files.clear();
   selectorIndex = 0;
-  auto root = SD.open(basepath.c_str());
-  for (File file = root.openNextFile(); file; file = root.openNextFile()) {
-    auto filename = std::string(file.name());
-    if (filename[0] == '.') {
+  auto root = SdMan.open(basepath.c_str());
+  char name[128];
+  for (auto file = root.openNextFile(); file; file = root.openNextFile()) {
+    file.getName(name, sizeof(name));
+    if (name[0] == '.') {
       file.close();
       continue;
     }
 
     if (file.isDirectory()) {
-      files.emplace_back(filename + "/");
+      files.emplace_back(std::string(name) + "/");
     } else {
+      auto filename = std::string(name);
       std::string ext4 = filename.length() >= 4 ? filename.substr(filename.length() - 4) : "";
       std::string ext5 = filename.length() >= 5 ? filename.substr(filename.length() - 5) : "";
       if (ext5 == ".epub" || ext5 == ".xtch" || ext4 == ".xtc") {

src/activities/reader/ReaderActivity.cpp

@@ -1,7 +1,5 @@
 #include "ReaderActivity.h"
 
-#include <SD.h>
-
 #include "Epub.h"
 #include "EpubReaderActivity.h"
 #include "FileSelectionActivity.h"
@@ -29,7 +27,7 @@ bool ReaderActivity::isXtcFile(const std::string& path) {
 }
 
 std::unique_ptr<Epub> ReaderActivity::loadEpub(const std::string& path) {
-  if (!SD.exists(path.c_str())) {
+  if (!SdMan.exists(path.c_str())) {
     Serial.printf("[%lu] [   ] File does not exist: %s\n", millis(), path.c_str());
     return nullptr;
   }
@@ -44,7 +42,7 @@ std::unique_ptr<Epub> ReaderActivity::loadEpub(const std::string& path) {
 }
 
 std::unique_ptr<Xtc> ReaderActivity::loadXtc(const std::string& path) {
-  if (!SD.exists(path.c_str())) {
+  if (!SdMan.exists(path.c_str())) {
     Serial.printf("[%lu] [   ] File does not exist: %s\n", millis(), path.c_str());
     return nullptr;
   }

src/activities/reader/XtcReaderActivity.cpp

@@ -9,10 +9,10 @@
 
 #include <FsHelpers.h>
 #include <GfxRenderer.h>
-#include <InputManager.h>
+#include <SDCardManager.h>
 
-#include "CrossPointSettings.h"
 #include "CrossPointState.h"
+#include "MappedInputManager.h"
 #include "XtcReaderChapterSelectionActivity.h"
 #include "config.h"
 
@@ -357,8 +357,8 @@ void XtcReaderActivity::renderPage() {
 }
 
 void XtcReaderActivity::saveProgress() const {
-  File f;
-  if (FsHelpers::openFileForWrite("XTR", xtc->getCachePath() + "/progress.bin", f)) {
+  FsFile f;
+  if (SdMan.openFileForWrite("XTR", xtc->getCachePath() + "/progress.bin", f)) {
     uint8_t data[4];
     data[0] = currentPage & 0xFF;
     data[1] = (currentPage >> 8) & 0xFF;
@@ -370,8 +370,8 @@ void XtcReaderActivity::saveProgress() const {
 }
 
 void XtcReaderActivity::loadProgress() {
-  File f;
-  if (FsHelpers::openFileForRead("XTR", xtc->getCachePath() + "/progress.bin", f)) {
+  FsFile f;
+  if (SdMan.openFileForRead("XTR", xtc->getCachePath() + "/progress.bin", f)) {
     uint8_t data[4];
     if (f.read(data, 4) == 4) {
       currentPage = data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);

src/activities/reader/XtcReaderChapterSelectionActivity.cpp

@@ -1,9 +1,8 @@
 #include "XtcReaderChapterSelectionActivity.h"
 
 #include <GfxRenderer.h>
-#include <InputManager.h>
-#include <SD.h>
 
+#include "MappedInputManager.h"
 #include "config.h"
 
 namespace {