1 files changed, 49 insertions, 0 deletions
diff --git a/keyboards/crkbd/keymaps/lib/keylogger.c b/keyboards/crkbd/keymaps/lib/keylogger.c
new file mode 100644
index 0000000000..ee14ff0335
--- /dev/null
+++ b/keyboards/crkbd/keymaps/lib/keylogger.c
@@ -0,0 +1,49 @@
+#include "crkbd.h"
+
+char keylog[40] = {};
+char keylogs[21] = {};
+int keylogs_idx = 0;
+
+char code_to_name[60] = {
+    ' ', ' ', ' ', ' ', 'a', 'b', 'c', 'd', 'e', 'f',
+    'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
+    'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
+    'R', 'E', 'B', 'T', ' ', ' ', ' ', ' ', ' ', ' ',
+    ' ', ';', '\'', ' ', ',', '.', '/', ' ', ' ', ' '};
+
+void set_keylog(uint16_t keycode, keyrecord_t *record)
+{
+  char name = ' ';
+  if (keycode < 60)
+  {
+    name = code_to_name[keycode];
+  }
+
+  // update keylog
+  snprintf(keylog, sizeof(keylog), "%dx%d, k%2d : %c",
+           record->event.key.row,
+           record->event.key.col,
+           keycode,
+           name);
+
+  // update keylogs
+  if (keylogs_idx == sizeof(keylogs) - 1)
+  {
+    keylogs_idx = 0;
+    for (int i = 0; i < sizeof(keylogs) - 1; i++)
+    {
+      keylogs[i] = ' ';
+    }
+  }
+  keylogs[keylogs_idx] = name;
+  keylogs_idx++;
+}
+
+char *read_keylog(void) {
+  return keylog;
+}
+
+char *read_keylogs(void) {
+  return keylogs;
+}