X25AM Programming Manual

PTP Applications

X25AM Programming Manual—527201-001

3-56

Wait for the Data Exchange (Use Mode 2)

!Set the data-exchange mode to 2.

3. CONTROL 11.

!Wait for an Incoming Call.

!An Incoming Call is received.

!A Call Accepted is sent.

!The remote device writes the data for the first packet for

!logical record A. The WRITE COUNT is equal to PACKETSIZE.

!The M bit is set to one.

!The first data packet (M=1) for logical record A

!is received.

4. READ a packet.

!The program waits for data from the remote device with a

!READ. The remote device has already sent the first packet

!for logical record A. The data from the data packet is

!transferred to the READ buffer.

!The READ completes successfully.

!The remote device writes the second and last packet for

!logical record A. The data is less than PACKETSIZE.

!The M bit is set to 0.

!The final data packet (M=0) for logical record A

!is received.

5. READ a packet.

!The program waits for data from the remote device with a

!READ. The remote device has already sent the final data

!packet for logical record B. The data is transferred to

!the READ buffer.

!The READ completes successfully.

!An RR packet is sent.

!An interrupt packet is sent.