1 files changed, 49 insertions, 0 deletions
diff --git a/circuitpython/lib/adafruit_floppy/standalone/main.c b/circuitpython/lib/adafruit_floppy/standalone/main.c
new file mode 100644
index 0000000..fee8142
--- /dev/null
+++ b/circuitpython/lib/adafruit_floppy/standalone/main.c
@@ -0,0 +1,49 @@
+// SPDX-FileCopyrightText: 2022 Jeff Epler for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include <stdio.h>
+
+struct mfm_io {};
+
+#include "mfm_impl.h"
+
+void hexdump(void *buf_in, size_t n) {
+  unsigned char *buf = buf_in;
+  size_t i = 0;
+  for (; i < n; i++) {
+    if (i % 16 == 0) {
+      printf("%04zx ", i);
+    }
+    printf("%02x%c", buf[i], (i % 16 == 15) ? '\n' : ' ');
+  }
+  if (i % 16 != 0) {
+    putchar('\n');
+  }
+}
+
+static inline mfm_io_symbol_t mfm_io_read_symbol(mfm_io_t *io) {
+  int c = getchar();
+  return (mfm_io_symbol_t)(c - '0');
+}
+
+static void mfm_io_reset_sync_count(mfm_io_t *io) {}
+
+static inline int mfm_io_get_sync_count(mfm_io_t *io) {
+  return feof(stdin) ? 2 : 0;
+}
+
+int main() {
+  enum { n_sectors = 18 };
+  char data[n_sectors * blocksize];
+  uint8_t validity[n_sectors];
+  struct mfm_io io;
+  read_track(io, n_sectors, data, validity);
+  for (int i = 0; i < n_sectors; i++) {
+    printf("validity[% 2d] = %d\n", i, validity[i]);
+    if (validity[i]) {
+      hexdump(data + i * blocksize, blocksize);
+      printf("\n");
+    }
+  }
+}