AK-NORD XT-PICO-XXL, Manual

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Standard mode:
Settings:
1 = Master/Slave = M
2 = Bitrate = 1000000(1.019.642)
3 = Databits = 8
4 = CPOL = 1
5 = CPHA = 0
6 = Data Control =
N
7 = Data Poll*10ms = 10
8 = Flow Control = N
9 = RTS Protocol = 0
In this mode the SPI interface is absolutely transparent. I.e. no data will be sent to the SPI-Slave as long as
no data are being received. The user has got the option to control the data flow by himself. Therefore, in
order to receive data from the SPI-Slave, there must first be a connection available via the TCP/IP and it is
necessary to send data from the Client (Remote). Such data will then be directly sent to the SPI–Slave.
Example:
There is a TCP/IP connection available and the SPI-Slave has to return on byte “0x33” in response to a 3
byte query e.g. “0x01, 0x00, 0x33“.
The data which are marked by “nn” do not include any relevant information. However, it is necessary to keep
in mind that one bit is being received for each bit which is leaving the Master. (Refer to illustration)
Remote XT-PICO SPI-Slave
0x01, 0x00, 0x33 -> 0x01, 0x00, 0x33 -> ->
0xnn, 0xnn, 0xnn <- 0xnn, 0xnn, 0xnn <- <-
0xnn -> 0xnn -> ->
0x33 <- 0x33 <- <-
or (if the SPI–Slave is rapid enough)
0x01, 0x00, 0x33, 0xnn-> 0x01, 0x00, 0x33, 0xnn -> ->
0xnn, 0xnn, 0xnn ,0x33 <- 0xnn, 0xnn, 0xnn, 0x33 <- <-