diff --git a/sw/fsdir/verylargetextwithverylongname.txt b/sw/fsdir/verylargetextwithverylongname.txt new file mode 100644 index 0000000..a5e31d9 --- /dev/null +++ b/sw/fsdir/verylargetextwithverylongname.txt @@ -0,0 +1,33 @@ +very large text file with a very long name +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 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+12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 +12345678901234567890123456789012345678901234567890123456789012345678901234567890 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+~!@#$%^&*()_+`1234567890-=[]\{}|;':",./<>?~!@#$%^&*()_+`1234567890-=[]\{}|;':",./<>?~!@#$%^&*()_+`1234567890-=[]\{}|;':",./<>?~!@#$%^&*()_+`1234567890-=[]\{}|;':",./<>?~!@#$%^&*()_+`1234567890-=[]\{}|;':",./<>?~!@#$%^&*()_+`1234567890-=[]\{}|;':",./<>?~!@#$%^&*()_+`1234567890-=[]\{}|;':",./<>?~!@#$%^&*()_+`1234567890-=[]\{}|;':",./<>? diff --git a/sw/kernel/filesystems/fat32.h b/sw/kernel/filesystems/fat32.h index fdaf57e..2a02f8a 100644 --- a/sw/kernel/filesystems/fat32.h +++ b/sw/kernel/filesystems/fat32.h @@ -41,5 +41,6 @@ struct lfn_entry { int8_t fat32_get_cluster_by_name(char* name, struct fat32_directory_entry* dentry); int8_t fat32_read_cluster(uint32_t cluster, void* buf); +uint32_t fat32_next_cluster(uint32_t cluster); #endif diff --git a/sw/kernel/filesystems/fat32_c.c b/sw/kernel/filesystems/fat32_c.c index 91f8b5e..438377a 100644 --- a/sw/kernel/filesystems/fat32_c.c +++ b/sw/kernel/filesystems/fat32_c.c @@ -12,10 +12,23 @@ int8_t fat32_read_cluster(uint32_t cluster, void* buf) { return error; } +uint32_t fat32_next_cluster(uint32_t cluster) { + uint8_t error; + uint32_t addr = fat_start_sector; + uint32_t cluster_val; + SD_readSingleBlock(addr, sd_buf, &error); + cluster_val = ((uint32_t*)sd_buf)[cluster]; + return cluster_val; +} + int8_t fat32_get_cluster_by_name(char* name, struct fat32_directory_entry* dentry) { struct fat32_directory_entry* local_entry; int i = 0; + uint32_t cluster; + + cluster = fat32_next_cluster(root_cluster); + cprintf("Sectors per cluster: %hhx\n", sectors_per_cluster); fat32_read_cluster(root_cluster, sd_buf); diff --git a/sw/test_code/fs_test/main.c b/sw/test_code/fs_test/main.c index 2067d4b..2245139 100644 --- a/sw/test_code/fs_test/main.c +++ b/sw/test_code/fs_test/main.c @@ -9,10 +9,11 @@ int main(void) { int i; uint32_t offset = 0; uint32_t cluster; + uint8_t cluster_count; fat32_init(); /* This is what is going to be part of open */ - fat32_get_cluster_by_name("TEST TXT", &dentry); + fat32_get_cluster_by_name("VERYLA~1TXT", &dentry); cprintf("attr1: %x\n", dentry.attr1); cprintf("cluster: %x%x\n", dentry.cluster_high, dentry.cluster_low); cprintf("File Size: %lx\n", dentry.file_size); @@ -20,10 +21,18 @@ int main(void) { /* This will become part of read */ cluster = (dentry.cluster_high << 16) | dentry.cluster_low; + cluster++; fat32_read_cluster(cluster + offset/512, sd_buf); - for (i = 0; i < dentry.file_size; i++) { - cprintf("%c", sd_buf[i]); + cluster_count = (dentry.file_size/512)/sectors_per_cluster; + cprintf("Cluster count: %x\n", cluster_count); + + while (cluster < 0xffffff0) { + for (i = 0; i < dentry.file_size && i < 512; i++) { + cprintf("%c", sd_buf[i]); + } + cluster = fat32_next_cluster(cluster); + fat32_read_cluster(cluster + offset/512, sd_buf); } return 0;