SCR331-DI Product Technical Manual
5.2 READER_CNTLESS_SEND_REQ
This escape message causes the firmware to issue the PICC Request command. The first byte
of the input buffer contains the escape function value and the second one contains the request code
to be issued. The output buffer contains the Answer To request bytes.
5.3 READER_CNTLESS_SEND_LOOP
This escape message causes the firmware to issue the PICC Request and Anti-Collision
commands. The first byte of the input buffer contains the escape function value and the second one
contains the request code to be issued. The output buffer contains the Answer To request bytes.
5.4 READER_CNTLESS_GET_MFRC_REV
This escape message return the Mifare version No. Production engineers to find out if they
are using an older Mifare rev can use this feature. The input buffer contains the escape function
value. The output buffer should point to two BYTE buffer and on success will contain the Mifare
version no.
5.5 READER_CNTLESS_GET_ATS
The ATS bytes for T= CL cards are now made available to the host through this escape IOCTL .The
input buffer contains the byte indicating the escape function value. The output buffer contains the ATS
bytes.
Please note that this escape message should not be issued after card transmission starts.
5.6 READER_CNTLESS_GET_TYPE
This escape message ID retrieves the Type of the card which the reader is configured to detect. The
input buffer shall contain the escape message value. The output buffer shall point to a BYTE buffer.
Following table gives the value of Type of card which firmware will detect
S.No. Types
Value
Remarks
1
TYPE A
0
Type A only
2
TYPE B
1
Type B only
3
TYPE AB
2
Type A and Type B
5.7 READER_CNTLESS_SET_TYPE
This escape message ID sets the current type (Type A / Type B / Type AB) of the card the reader will
detect. Applications may call this function, to set the desired Type. Typically, this call is used to set the
firmware to detect Type A only or Type B only or both Type A and Type B cards The default is Type
AB that is both type A and type B cards are detected. The first byte of the input buffer will contain the
escape message value and the second one will contain the value for the desired type. The output
buffer field shall be NULL.
Following table gives the value of Types as interpreted by firmware
S.No. Types
Value
Remarks
1
TYPE A
0
Type A only
2
TYPE B
1
Type B only
3
TYPE AB
2
Type A and Type B
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