Method numTracksInFolder

src/DFPlayerMini_Fast.cpp:861–864

/ ! @brief Determine the number of tracks in the specified folder. @param folder The folder number. @return Number of tracks in the specified folder, -1 if error. */ /

 */
 /**************************************************************************/
int16_t DFPlayerMini_Fast::numTracksInFolder(uint8_t folder)
{
	return query(dfplayer::GET_FOLDER_FILES, (folder >> 8) & 0xFF, folder & 0xFF);
}