- /* 0xAA means input with internal pullup disabled */
- ts->write(dev, 0x08 + i, 0xAA);
+ /*
+ * initialize port_config with "0xAA", which means
+ * input with internal pullup disabled. This is needed
+ * to avoid writing zeros (in the inner for loop),
+ * which is not allowed according to the datasheet.
+ */