Siemens TC63 User Manual download pdf (Page 456)

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101

TC63 AT Command Set

19.7 AT^SSPI

TC63_ATC_V00.490 Page 456 of 501 5/24/05

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19.7.4 Example: Using I²C Bus

As stated above, it is recommended to run the Terminal program in chat mode or to use the local echo. First,

activate the I²C interface:

The module is in data mode now. This allows you to send a Write Transfer Message:

To quit data mode and return to command mode enter the Close character "#":

If the ME is in command mode, the response to the read command contains the factory settings.

If the ME is in data mode, the response to the read command contains the current settings.

AT^SSPI=0010,0000,0000

The first group of characters forms the <basicCon-

figuration>, where the first "0" sets I²C, the sec-

ond "0" is the internal port, the digit "1" sets 400 kbps

bit rate on the I²C bus, and the next "0" selects ASCII

coding. This is followed by a comma and the value

"0000" = no delay time after Write and Read.

Note: If omitted all above parameters are assumed

by default. Therefore, instead of

AT^SSPI=0010,0000,0000 it is sufficient to enter

only AT^SSPI=

CONNECT

Write Transfer Frame, where a = ID, AE = Slave

Address and write request.

{a+}

Write Response Message, where a = ID.

<bAF0010;>

Read Transfer Message, where b = ID, AF = Slave

Address and read request, 0010 = number of

expected bytes.

{b+000102030405060708090A0B0C0D0E0F}

Read Response Message, where b = ID.

The response OK confirms that the ME is back to

command mode and ready to accept any AT com-

mands.

AT^SSPI?

AT^SSPI=0,0010,0000,0000

The read command returns the connection state "not

connected" (Channel closed) and the factory set-

tings for I²C.

AT^SSPI?

AT^SSPI=1,0010,0012,00FF

The read command returns the connection state

"connected" (Channel open) and the current settings

for I²C.

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