Hi everyone, hoping someone can help.
I have a setup that is using a now broken display. I'm not sure of the original manufacturer as it doesn't say.
I have bought an Adafruit 1.3" Wide Angle TFT to replace it but the pin labels are different.
On the old I have cables in:
GND
VCC
SCL
SDA
RES
DC
The new has
VIN
3v3
GND
SCK
SO
SI
TCS
RST
D/C
CCS
Lite
Any help would really be appreciated.
Thankyou!
Welcome to the forum
Are you sure that the 2 displays have the same type of interface ? (SPI or I2C)
The old display has SCL and SDA pins, which means that it is an I2C interface
The new display has what looks more like SPI pin names
Please post a link to both displays or at least the new one
Many displays use these names also for SPI.
SDA is generic for Serial Data, sometimes for input and output on same pin.
SCL is generic for Serial Clock.
If there is a DC or D/C pin, then it is for SPI, most likely
But when there is no CS pin, it looks like it is not SPI.
But the old display does not use enough pins for it to be an SPI interface unless they have gone mad with the names
@stevehunt77 Which pins on which Arduino does the old display use ?
Thanks for helping.
This is a link to the new one:
The old one has Interface SPI on it. Looking in the description of the new one it also mentions SPI.
From the site that you linked to
Finally, we found one that is SPI
So it has an SPI interface, but according to the old board it too has an SPI interface
I find that hard to believe but could still be true
Please post the details of how the old one was connected to the Arduino. Which pins on which board ?
It connects to a Nano (I don't have details of the uploaded program).
Red goes to 3v3
Black to GND
Green to D13
Blue to D11
Yellow to D10
Orange to D9
OK, that is helpful and makes it sound like an SPI interface with weird names
Try this, using the pin names printed on the back of the new board
SCK = 13
MIS = 12
MOS = 11
SCK = 10
GND = GND
Vin = 5V
Thankyou!
The current screen goes to the 3v3 Pin on the board and I have an on off switch with battery link on the 5v Pin on the nano.
So maybe I should put Red to the 3v3 of new screen?
Supplying 3.3V to the screen 3.3V pin rather than 5V to the 5V pin will be safer but may not work
Try it and see
The connections may be more complicated because the new screen has a built in SD card reader
Just wanted to confirm as you have SCK twice.
Is the second one meant to be SCS?
Whoops, my bad
Yes, I meant SCS, (Chip Select in SPI speak). I am hoping that it means Screen Chip Select
and that TCS is the Chip Select for the SD card reader but don't know the relevance of the 'T'
Ok thankyou.
Would you expect the screen to 'come to life' if just the Power & Ground are connected.
Or is this likely to need all wires in the right place to come alive?
I suppose that you might see something happen with just power and GND but nothing sensible
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