brp_VHL_GetLegacyATR()

brp_errcode brp_VHL_GetLegacyATR	(	brp_protocol	protocol,
		brp_buf *	ATR,
		size_t *	ATR_len,
		brp_mempool *	mempool
	)

This command is deprecated and should only be used for compatibility purposes with older firmware version. It returns the Answer To Reset (ATR) of the currently selected card in a legacy format, i.e. not conform with the [PC/SC specification, version 2](http://pcscworkgroup.com/Download/Specifications/pcsc3_v2.01.09.pdf). For new projects it is recommended to use the VHL.GetATR command instead.

If the VHL.Select command has not been successfully executed before this command, the VHL.ErrCardNotSelected status code will be returned. If the last selected card is no longer available in the field of the antenna, or if a read/write operation failed before executing this command, the returned ATR is undefined.

The returned ATR variable always has the following format:

• 0x3B
• Length of card UID (in bytes)
• Card UID

Parameters

[in]	protocol	used to execute the command
[out]	ATR	Answer To Reset value in legacy format.
[out]	ATR_len
[in]	mempool	is used to store response data. Maybe NULL to use an internal mempool, in this case the data is only available until another command uses the internal mempool