| Electronics > Projects, Designs, and Technical Stuff |
| I2C Bus usage |
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| THORs_Hand:
Hello! I'm gathering the required parts to slap together a custom tablet PC, I'm planning to combine the guts of an ASUS X55A laptop (Intel Celeron 1000M model https://www.asus.com/Laptops/X55A/ ) with the display and touchscreen of an HP Envy X2 11g-series tablet, now since the tablet is useless (no, really, it barely handles Windows) and the X55A has no display and it doesn't worth repairing, i thought why not combine them into a tablet, since i need one. My problem so far is the touchscreen, the display it's standard LVDS, but the touch panel it's I2C, as far as i remember (since i have no way of checking again) the X55A doesn't have any devices (in device manager) that are connected to the I2C bus; I read online that i could either connect it to the SMBus, or DDC bus, but i don't know if it would work, i don't really have a way to test it. In it's service manual ( http://h10032.www1.hp.com/ctg/Manual/c03581901 ) at page 57/87 you can see the board, i found pictures online of the board (i didn't open the tablet yet out of fear of loosing something important like i always do) but i couldn't find them again to attach them here, these boards seem rare.On the flat flex connecting it to the main PCB there are 8 pins, and a BGA chip on the connector board i can't see the model number on. How can i connect that panel to the laptop? Does the X55A has any I2C bus? or can anyone help me with a schematic of the motherboard? i can't find it anywhere. P.S. I imagine that converting the I2C to USB will make the driver useless, it working with it's driver it's critical since it has the display mapping. Thank you in advance :) |
| IMI4tth3w:
from my limited experience with touch screens, they usually have multiple options for connectivity. Can you find the main touch IC so we can look up the datasheet? There might be a USB output hidden in there somewhere. |
| THORs_Hand:
Hey, I opened it up (breaking it's glass :P) The mystery chip is : AtMel MXT1664S-CU Couldn't find it's datasheet |
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