21.13.1.38 prbs_test
(Ask a Question)Description
This Tcl command used in PRBS test to start, stop, reset the error counter and read the error counter value. PRBS data stream patterns are generated and checked by the internal SERDES block. These are used to self-test signal integrity of the device. You can switch the device through several predefined patterns.
prbs_test is renamed as smartbert_test in G5.
prbs_test [-deviceName device_name ] -start -serdes "integer value" \
-lane "integer value" [-near] -pattern "PatternType"
prbs_test [-deviceName device_name ] -stop -serdes "integer value" \
-lane "integer value"
prbs_test [-deviceName device_name ] -reset_counter \
-serdes "integer value" -lane "integer value"
prbs_test [-deviceName device_name ] -read_counter \
-serdes "integer value" -lane "integer value"Arguments
| Parameter | Type | Description |
|---|---|---|
deviceName | string | Specifies device name. This parameter is optional if only one device is available in the current configuration or set for debug. |
start | none | Starts the prbs test. |
stop | none | Stops the prbs test. |
reset_counter | none | Resets the prbs error count value to 0. |
read_counter | none | Reads and prints the error count value. |
SerDes | integer | SerDes block number. Must be between 0 and 4 and varies between dies. |
lane | integer | SerDes lane number. Must be between 0 and 4. |
near | none | Corresponds to near-end (on-die) option for prbs test. Not specifying implies off-die. |
pattern | string | The pattern sequence to use for PRBS test. It can be one of the following: prbs7, prbs11, prbs23, or prbs31. |
| Return Type | Description |
|---|---|
| None | None |
Error Codes
| Error Code | Description |
|---|---|
None | Parameter 'param_name' is not defined. Valid command formatting is 'prbs_test [-deviceName "device name"] [-start "TRUE | FALSE"] [-stop "TRUE | FALSE"] [-reset_counter "TRUE | FALSE"] [-read_counter "TRUE | FALSE"] [-pattern "Pattern type"] -serdes "integer value" -lane "integer value" [-near "TRUE | FALSE"] ' |
None | Required parameter 'serdes' is missing. |
None | serdes: Invalid argument value: 'serdes_value' (expecting integer value). |
None | Required parameter 'lane' is missing. |
Supported Families
| SmartFusion 2 |
| IGLOO 2 |
RTG4 |
Example
The following example starts PRBS test with the "prbs11" pattern:
prbs_test -start -serdes 1 -lane 0 -near -pattern "prbs11"See Also
smartbert_test
loopback_mode
loopback_test