Discussion
Banana Pi to HY070CTP-HD LCD (LVDS/RGB)
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[Discussion]
Banana Pi to HY070CTP-HD LCD (LVDS/RGB)
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Edited by zola at Fri Jan 30, 2015 07:53
harryweb replied at Wed Jan 21, 2015 04:48 
I think you want to this LCD in LVDS mode (?)
I tried to see what pin must be connected to, but some ...
I don't care really if it's RGB or LVDS. LVDS has slightly less pins to connect.
I had a go at mapping the pins for LVDS:
Screen -> Banana
1 -> disconnected
2,3,4 -> pos Power 3.3V
5,6,7 -> neg Ground (Any difference between ground pins?)
8 -> 11 0N
9 -> 9 0P
10 -> neg Ground (3.3V)
11 -> 15 1N
12 -> 13 1P
13 -> neg Ground (3.3V)
14 -> 19 2N
15 -> 17 2P
16 -> neg Ground (3.3V)
17 -> 23 CLKN
18 -> 21 CLKP
19 -> neg Ground (3.3V)
20 -> 27 3N
21 -> 25 3P
22 -> neg Ground (3.3V)
23 -> disconnected
24 -> disconnected
25 -> neg Ground (3.3V)
26 -> 2 i2c SDA (touchscreen)
27 -> 4 i2c SCK (touchscreen)
28 -> not sure
29 -> not sure
30 -> neg Ground (3.3V)
31 }
32 -> 5/24 Ground (5V)
33 }
34 -> disconnected
35 -> 10 PWM
36 -> Not sure
37 -> disconnected
38 }
39 -> 1,3 Power (5V)
40 } |
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I think I would start with RGB though. The mapping pattern I showed in the first post makes it easy to figure out the connections, plus it seems like LVDS needs a 3.3V power supply whereas RGB does not. |
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harryweb replied at Wed Jan 21, 2015 04:00
I didn't know about this kind of PCB with connectors. Great ! So you could test as soon as you will ...
http://www.ebay.com.au/itm/7-102 ... hash=item3ce48e34e6
I bought the screen here from ebay user 'waveshare' and the postage was very fast. |
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Edited by harryweb at Fri Jan 23, 2015 04:15
OK you are right for pin.
I'm not sure that pin 28 & 29 are needed. These are output for cap touch screen interrupt and wake up for external controler
pin 36 is used to enable the LCD backlight, must be connected to +3.3V when ON (or use a GPIO to control it)
RGB needs 3.3V too ! see pin 4
May be I will try one screen soon, but I also need to know if touch screen driver is working for BPI and how to make resolution configuration. As I am beginner too.
Regards
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Edited by hannan.khan at Tue Jan 27, 2015 05:52
i was able to connect the board as per the schematic and got the lcd backlight running, but i cant get any data(blank screen) on the LCD.... i have tried to change the fex and init.rc file but cant get any progress....any help?
edit: i am working with the RGB connector |
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harryweb replied at Fri Jan 23, 2015 02:05
OK you are right for pin.
I'm not sure that pin 28 & 29 are needed. These are output for cap touch s ...
Thanks for pointing that out |
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zola replied at Wed Jan 28, 2015 19:52
Have you seen this? http://www.haoyuelectronics.com/service/A10-A20/A20-images/linux-configs/sys_c ...
yea i already looked into it changed the values accordingly.... i got the lcd running ovr Lubuntu & banannian so i knw the values i am using are correct but i cant seem to work it over android.... ll try to go to the lvds connector i hope that solves the issue |
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Could you post the fex that you used that works with Lubuntu and bananian? |
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Author
Post time Jan 23, 2015 02:05