touch_uniformity

Source code: touch_uniformity.py

A factory test for checking touch uniformity.

Description

This test is intended to be run during run-in without a fixture or operator. The test recalibrates the touch device then reads raw reference (baseline) data. Each value must fall within a specified max and min range. Delta values (the baseline - current reading) are also checked.

The args thresholds in need to be experimentally determined by checking a set of machines. The test logs the actual max and min values found.

Currently, the test only supports Atmel based touch devices.

Test Procedure

The test runs automatically. The touch device shouldn’t be touched when calibrating.

Dependency

• Device API cros.factory.device.touch.

Examples

Sample test_list entry:

{
  "pytest_name": "touch_uniformity",
  "label": "Touchscreen Uniformity",
  "run_if": "not constants.has_device_data or device.component.has_touchscreen",
  "related_components": [
    "test_tags.TestCategory.TRACKPAD"
  ],
  "args": {
    "check_list": [
      [
        0,
        "i18n! References",
        23400,
        25100,
        0,
        0
      ],
      [
        1,
        "i18n! Deltas",
        -30,
        40,
        0,
        0
      ]
    ]
  }
}

Test Arguments

Name	Type	Description
device_index	int	(optional; default: 0) Index of touch device to test.
check_list	list	A list of sequence. Each sequence consists of six elements: frame_idx, label, min_val, max_val, rows, cols. frame_idx: Index of frame to check. label: A i18n translation dictionary of frame label. min_val: Lower bound for values in this frame. max_val: Upper bound for values in this frame. rows: Number of rows from top to check, or zero to check all. cols: Number of columns from left to check, or zero to check all.
keep_raw_logs	bool	(optional; default: True) Whether to attach the log by Testlog