X20 system modules • X20 electronics module communication • X20CS1020
X20 system User's Manual 3.10
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4.18.5.6.5.5 Parity_IF
Name:
phyParity
phyParity_CANIO
This register is used to define the parity check type. Possible values are ASCII coded.
Data type
Value
Description
48
"0" - (low) bit is always 0
49
"1" - (high) bit is always 1
69
"E" - (even) even parity (default)
78
"N" - (no) no bit
USINT
79
"O" - (odd) odd parity
4.18.5.6.6 Handshake - Configuration
In order to guarantee that serial communication runs smoothly, the size of the receive buffer in the module must
be known. In addition, the user can configure a software or hardware handshake algorithm.
4.18.5.6.6.1 Locking the receive buffer
Name:
rxlLock
rxlLock_CANIO
This register is used to configure the upper threshold of the receive buffer.
The two registers "Lock" and "Unlock" can be used for "flow control" monitoring of the communication. If the amount
of data from the module input exceeds the "Lock" register value, flow control switches to the "passive" state. To
return to the "active" or "ready" state, the amount of data in the receive buffer must fall under the default value
of the "Unlock" register.
Information:
These registers simulate the behavior of a Schmitt trigger, so the value of the "Lock" register must be
greater than the value of the "Unlock" register.
Data type
Value
Description
UINT
0 to 4095
Upper threshold of the receive buffer (default = 1024)
4.18.5.6.6.2 Unlocking the receive buffer
Name:
rxlUnlock
rxlUnlock_CANIO
This register is used to configure the lower threshold of the receive buffer.
The two registers "Lock" and "Unlock" can be used for "flow control" monitoring of the communication. If the amount
of data from the module input exceeds the "Lock" register value, flow control switches to the "passive" state. To
return to the "active" or "ready" state, the amount of data in the receive buffer must fall under the default value
of the "Unlock" register.
Information:
These registers simulate the behavior of a Schmitt trigger, so the value of the "Lock" register must be
greater than the value of the "Unlock" register.
Data type
Value
Description
UINT
0 to 4095
Lower threshold of the receive buffer (default = 512)
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