Touchscreen (i.MX31)

Touchscreen Channels

The ADC performs various functions, e.g. the touchscreen uses it to detect the position of the pen tip. This test can be easily made. Run the command

/unit_tests/mxc_pmic_test/pmic_testapp_adc -T TS

If you hold down the pen on the touchscreen, you will be able to see the coordinates. If not, you will receive the message that the test failed, since no valid coordinates were detected.

You can also manually read out the values by performing the following command

/unit_tests/mxc_pmic_test/pmic_testapp_adc -T CONV

Channels 12-15 are X and Y values accordingly. You should see the values change

If you encounter problems with this test, check the FAQ section concerning event devices and their numbering.