Save root cluster number

sw/test_code/fs_test/harness.c

@@ -16,6 +16,9 @@ uint16_t imulii(uint16_t a, uint16_t b) {
 
 uint8_t SD_readSingleBlock(uint32_t addr, uint8_t *buf, uint8_t *error) {
     FILE* f = fopen(FILE_PATH, "rb");
+    (void)error;
     fseek(f, addr * 512, SEEK_SET);
     fread(buf, 512, 1, f);
+    fclose(f);
+    return 0;
 }

sw/test_code/fs_test/main.c

@@ -3,7 +3,6 @@
 void fat32_init(void);
 
 int main(void) {
-    printf("Hello, world!\n");
     fat32_init();
     return 0;
 }