ATH3K_NAME_LEN
char filename[ATH3K_NAME_LEN];
snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
char filename[ATH3K_NAME_LEN];
snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",