Discussion

Banana Pi to HY070CTP-HD LCD (LVDS/RGB)

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zola  
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     }

zola  
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.

zola  
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.

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

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

zola  
hannan.khan replied at Tue Jan 27, 2015 05:19
i was able to connect the board as per the schematic and got the lcd backlight running, but i cant g ...

Have you seen this? http://www.haoyuelectronics.com/ ... lcd-hy070ctp-hd.fex
It's the fex file used in the MarsBoard A20 for this screen.

And this Banana Pi's RGB 5' screen fex:
https://github.com/LeMaker/fex_c ... /banana_pi_5lcd.fex

zola  
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

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

zola  
Could you post the fex that you used that works with Lubuntu and bananian?

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