Hello i want to connect an ili9341 2.2 tft whith arduino UNO.
For convert 5V to 3.3V i use a CD4050 and it s work.
Now i want to use adafruit 8-CHANNEL BI-DIRECTIONAL LOGIC LEVEL CONVERTER and do not work.
I test all pin whith multimeter, everything look ok, what s wrong ? can you help me ?
Plug txb0108 level shifter Arduino UNO and ili9341 2.2 tft
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- ghisdiy
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- Joined: Sat Sep 13, 2014 3:05 pm
- adafruit_support_rick
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- Joined: Tue Mar 15, 2011 11:42 am
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
Is that our ILI9340 TFT breakout? There's not need for level shifting with that with an Arduino UNO.
https://www.adafruit.com/product/1480
If you post some clear, detailed pictures of your setup, maybe we can spot the problem.
https://www.adafruit.com/product/1480
If you post some clear, detailed pictures of your setup, maybe we can spot the problem.
- ghisdiy
- Posts: 6
- Joined: Sat Sep 13, 2014 3:05 pm
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
No it is this one :
tomorrow (i am in Paris) i give you more details.
tomorrow (i am in Paris) i give you more details.
- ghisdiy
- Posts: 6
- Joined: Sat Sep 13, 2014 3:05 pm
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
So for the TFT i use this library http://arduinodev.com/software/multilcd/
I plug like this :
MISO pin 12 of the arduino
LED pin 3.3 v of the arduino
SCK pin A1
SDI pin A2
D/C pin A3
RESET pin A4
CS pin A5
GND to pin GND of the arduino
VCC to pin 3.3 of the arduino
VCCA of the txb0108 to pin 3.3 of the arduino
OE of the txb0108 to pin 3.3 of the arduino
VCCB of the txb0108 to pin 5v of the arduino
B1 to pin 13 of the arduino
B2 to pin 11 of the arduino
B3 to pin 6 of the arduino
B4 to pin 4 of the arduino
B5 to pin 5 of the arduino
GND of the txb0108 to pin GND of the arduino
Like this the TFT stay white.
When i replace the txb0108 by a CD4050 chip, the TFT work ...
any idea ?
I plug like this :
MISO pin 12 of the arduino
LED pin 3.3 v of the arduino
SCK pin A1
SDI pin A2
D/C pin A3
RESET pin A4
CS pin A5
GND to pin GND of the arduino
VCC to pin 3.3 of the arduino
VCCA of the txb0108 to pin 3.3 of the arduino
OE of the txb0108 to pin 3.3 of the arduino
VCCB of the txb0108 to pin 5v of the arduino
B1 to pin 13 of the arduino
B2 to pin 11 of the arduino
B3 to pin 6 of the arduino
B4 to pin 4 of the arduino
B5 to pin 5 of the arduino
GND of the txb0108 to pin GND of the arduino
Like this the TFT stay white.
When i replace the txb0108 by a CD4050 chip, the TFT work ...
any idea ?
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
It should work that way. Can you try hooking it up in one direction only (5V->3.3V) like the 4050?
- ghisdiy
- Posts: 6
- Joined: Sat Sep 13, 2014 3:05 pm
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
how can i do that ? whith diode ?
- adafruit_support_rick
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- Joined: Tue Mar 15, 2011 11:42 am
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
Only hook up the inputs to the ILI9241 through the TXB0108. Connect MISO directly between the TFT and the Arduino. You don't need a diode - the signal only goes one way. I'm just wondering if MISO is somehow confusing the logic.
Also, can you post a picture of the connections and soldering on the TXB1018?
Also, can you post a picture of the connections and soldering on the TXB1018?
- ghisdiy
- Posts: 6
- Joined: Sat Sep 13, 2014 3:05 pm
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
So for MISO it is already directly connect to Arduino
All other pin are throuth the TXB0108.
For the connections is like this:
All other pin are throuth the TXB0108.
For the connections is like this:
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
That is a lot of jumpers. Can you try it with fewer jumpers? This seems like a connection problem. Jumpers and breadboards can make bad connections sometimes.
Beyond that, I can't think of anything.
Beyond that, I can't think of anything.
- ghisdiy
- Posts: 6
- Joined: Sat Sep 13, 2014 3:05 pm
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
you are in right !
Thanks for your help.
Thanks for your help.
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Plug txb0108 level shifter Arduino UNO and ili9341 2.2 t
Aha!
You're welcome!
You're welcome!
Please be positive and constructive with your questions and comments.