huge work on FAT32, initial support for writing

ext/sd/tests/TestCreate.cpp

@@ -0,0 +1,50 @@
+#include <gtest/gtest.h>
+
+#include "Helper.h"
+
+#include "../AccessHelper.h"
+#include "../fat32/FS.h"
+
+// dd if=/dev/zero of=/tmp/ram/orig.fat32 bs=8192 count=4096
+// mkfs.vfat -F 32 -R 32 -s 8 orig.fat32
+// hexdump -v -C -n 512 orig.fat32
+
+
+
+TEST(TestCreate, structure) {
+
+	FAT32::FSHeader header;
+
+	ASSERT_EQ(0x0B, (uint8_t*)&header.bytesPerSector - (uint8_t*)&header);
+	ASSERT_EQ(0x0D, (uint8_t*)&header.sectorsPerCluster - (uint8_t*)&header);
+	ASSERT_EQ(0x0E, (uint8_t*)&header.numReservedSectors - (uint8_t*)&header);
+	ASSERT_EQ(0x10, (uint8_t*)&header.numberOfFATs - (uint8_t*)&header);
+	ASSERT_EQ(0x15, (uint8_t*)&header.mediaDescriptor - (uint8_t*)&header);
+	ASSERT_EQ(0x20, (uint8_t*)&header.sectorsInPartition - (uint8_t*)&header);
+	ASSERT_EQ(0x24, (uint8_t*)&header.sectorsPerFAT - (uint8_t*)&header);
+	ASSERT_EQ(0x2C, (uint8_t*)&header.rootDirFirstCluster - (uint8_t*)&header);
+
+}
+
+TEST (TestCreate, write) {
+
+	using BlockDev = AccessHelper<TestDevice>;
+
+	size_t size = 32*1024*1024;
+	TestDevice dev(size);
+	BlockDev bDev(dev);
+	FAT32::FS<BlockDev> fs(bDev, 0);
+	fs.setup(size);
+
+	const char* test = "This is a test";
+	FAT32::FS<BlockDev>::File2 f1 = fs.create2("test1.txt");
+	f1.write(strlen(test), (const uint8_t*)test, [](int percent) {});
+
+	FAT32::FS<BlockDev>::File2 f2 = fs.create2("test2.txt");
+	f2.write(strlen(test), (const uint8_t*)test, [](int percent) {});
+
+	dev.toFile("/tmp/ram/1.fat32");
+
+	// mount -t vfat 1.fat32 /mnt/fat/ && ls -l /mnt/fat/ && cat /mnt/fat/test1.txt && umount /mnt/fat
+
+}