RalleBert:
Hello! I´m new here and relatively new to Arduino and its programming.
That weekend I got a display like in this thread. After tying to get it work with 5V (and no success - what wonders!), I got the idea to power the Arduino board with 3,3V directly because I have no 4050 IC around. I used the 5V pin for that - a little rude, but it works without the 4050! Look at the datasheet, the Atmel 328p is working from 1,8 to 5,5V. Maybe you can run your projects with 3,3V and can avoid to use the 4050.
Yes, that will make the screen work, but:
a) How do you connect a USB cable so you can actually program it?
b) The 328p can work at 3.3V, but not at 16MHz. 16MHz needs 3.8V (see the datasheet).
and from what I read in the thread, it required a logic level converter to operate.
I want to make a small board that fits on the pins of the lcd board that will convert the 5V signals that the mega2560 has to 3,3V that the LCD requires.
Does anyone have this LCD and is willing to take some dimentional measurements so I can make the level converter board until the LCD arrives?
The dimensions that I'm after came be seen in the attached photo.
Hi @tolisn63, I attach my draw diagram (EagleCAD) as photo for the little convertion board (cd4050)
and a rar with EagleCAD 6.5 files. In EagleCAD I use also Adafruit and Sparkfun libraries for EagleCAD.
All pin from display to one pin of board and the corrisponding pin to Arduino following this scheme:
D4 : RESET
D5 : CS
D6 : D/C
D7 : LED
D11 : MOSI
D13 : SCK
This pin direct from display to Arduino
D12 : MISO direct to Arduino
You need also to connect GND and V3.3 to little board.
nid69ita:
Hi @tolisn63, I attach my draw diagram (EagleCAD) as photo for the little convertion board (cd4050)
and a rar with EagleCAD 6.5 files. In EagleCAD I use also Adafruit and Sparkfun libraries for EagleCAD.
All pin from display to one pin of board and the corrisponding pin to Arduino following this scheme:
D4 : RESET
D5 : CS
D6 : D/C
D7 : LED
D11 : MOSI
D13 : SCK
This pin direct from display to Arduino
D12 : MISO direct to Arduino
You need also to connect GND and V3.3 to little board.
Can you please post the electronic schematic of your pcb?
OK ok ok...
I've redo my wirering and tried to understand how works the CD4050BE (this is the one i used).
I've erase all my library linked to ILI TFT and download the one from ADAFRUIT (the ADAFRUIT ILI3140 Marster).
I've check and recheck everything... and i've tried one thing... to quote the hardware SPI line and unquote the SPI software line... and MIRACLE !!!
It's quite slow but it's very well working.
Here is the wire to help the one who has difficulty.
Can anyone can help us to switch back to the hardware SPI ?
nid69ita:
In attach sketch and library for ili9341 taht I used.
And image for PCB. But in previous post the rar file include all EagleCad files for my pcb.
So regarding the 4050 connection you are saying the following, correct ?
D4 on arduino -->4050--> RESET on display
D5 on arduino -->4050--> CS on display
D6 on arduino -->4050-->D/C on display
D11 on arduino -->4050--> MOSI on display
D13 on arduino -->4050--> SCK on display
D12 on arduino --> MOSI on display (no 4050 required)
Do the SD card signals also need a level shifter to work ?
nid69ita:
In attach sketch and library for ili9341 taht I used.
And image for PCB. But in previous post the rar file include all EagleCad files for my pcb.
So regarding the 4050 connection you are saying the following, correct ?
D4 on arduino -->4050--> RESET on display
D5 on arduino -->4050--> CS on display
D6 on arduino -->4050-->D/C on display
D11 on arduino -->4050--> MOSI on display
D13 on arduino -->4050--> SCK on display
D12 on arduino --> MISO on display (no 4050 required)
Do the SD card signals also need a level shifter to work ?
I've corrected this little thing from MOSI to MISO
I think the sd-cards need 3.3v too, so in my thoughts we need a Level Shifter for it too.
Greets
Hello all!
I have been playing with that TFT the last days.
For me, UTFT library was working good. Using 4050 between Mega & TFT. UTFT myGLCD(TFT01_22SP,51,52,47,48,49); <--- MOSI,SCK,CS,RST,DC wiring
nid69ita's posted library gimme that error:
E:\Mis Documentos\Arduino\libraries\SeeedTFTv2\TFTv2.cpp: In member function 'void TFT::TFTinit()':
E:\Mis Documentos\Arduino\libraries\SeeedTFTv2\TFTv2.cpp:90: error: 'TFT_RST_LOW' was not declared in this scope
E:\Mis Documentos\Arduino\libraries\SeeedTFTv2\TFTv2.cpp:92: error: 'TFT_RST_HIGH' was not declared in this scope
I was using the SD from Ethernet Shield as datalogger (with no problems) but now trying with the SD from TFT nothing works.
New wiring:
TFT_MISO to a 3.3-5v converter and the output to PIN50
SD_CS to the last free port of 4050 and to PIN46
Im using a Micro SDHC 4GB with an adapter, first test without modifications 4GB FAT32, now underformatted as 1GB, same results
CardInfo Sketch on ArduinoUno+Ethernet Shield: chipSelect = 4; Card type: SDHC Volume type is FAT16 Volume size (bytes): 1073446912 Volume size (Kbytes): 1048288 Volume size (Mbytes): 1023
CardInfo Sketch on ArduinoMega+SD from TFT 2.2 SPI: chipSelect = 46; Initializing SD card...initialization failed. Things to check: * is a card is inserted? YES * Is your wiring correct? * did you change the chipSelect pin to match your shield or module? YES
Do I have to make any change in the SPI config or...?
Im using a Micro SDHC 4GB with an adapter, first test without modifications 4GB FAT32, now underformatted as 1GB, same results
CardInfo Sketch on ArduinoUno+Ethernet Shield: chipSelect = 4; Card type: SDHC Volume type is FAT16 Volume size (bytes): 1073446912 Volume size (Kbytes): 1048288 Volume size (Mbytes): 1023
CardInfo Sketch on ArduinoMega+SD from TFT 2.2 SPI: chipSelect = 46; Initializing SD card...initialization failed. Things to check: * is a card is inserted? YES * Is your wiring correct? * did you change the chipSelect pin to match your shield or module? YES
Do I have to make any change in the SPI config or...?
Thanks
I got it working with the following:
Add pins to the SD card connector on the other side (that was not clear to me, since on my board there were pins in theTFT side, but not on the SD card side
Wiring the following connections:
Connect SD_SCK to SCK pin on Arduino (13 on Nano)
Connect SD_MOSI to MOSI pin on Arduino (11 on Nano)
Connect SD_MISO to MISO pin on Arduino (12 on Nano)
These are the same pins used for the TFT to connect!
Connect SD_CS to pin D8 or whatever you like
The SD_CS pin MUST be different to the TFT CS pin!
I connected all of them directly, while for the TFT I used resistors and a level shift by two transistors for the MISO line (3.3V -> 5V)
The VCC (3.3V) and GND comes from the TFT connector side
While using the Seeed ILI9341 2.2 TFT+SD library I had to change the CS pin for activating the SD card SPI #define chipSelect 8
and the filenames (123.bmp to flowers.bmp) which where the sample files provided by the library
That worked for me. But I think the SD card part should be 3.3V too!?
Has anyone managed to get this dispplay working with a mega2560 and hardware SPI mode?
I have used many libraries that work OK (but very slow) in software SPI but when I switch to hardware all I get is a white screen.
these are my pinout connections
Rst=48
dc=49
miso=50
mosi=51
sclk=52
cs=53
All signals from the mega2560 first pass from a level shifter and then go to the display.
Got the display working on my Arduino UNO, with all libraries 5UTFT, seed, adafruit, .. ), but I cant get the SD Card to initalize.
It always fails =/ used 256MB, 2GB SD, 4GB SHDC all from SanDisk, dont know if it matters.
I'm pretty sure I wired everything correctly, because I spended the last 2 days with trying different setups/libraries and I'm out of ideas. Someone got a suggestion to make it initaliaze (I dont use cd4050, I use voltage dividers R1: 100, R2:220) Gives about 3.4V but display works fine. Any suggestion could be helpfull. Thank you in advance
With the 220 Ohm resistor, the SD card has to provide 15mA. I do not think, that the SD is able to provide this amount of current.
At least use higher resistor values.
xeppex:
Got the display working on my Arduino UNO, with all libraries 5UTFT, seed, adafruit, .. ), but I cant get the SD Card to initalize.
It always fails =/ used 256MB, 2GB SD, 4GB SHDC all from SanDisk, dont know if it matters.
I'm pretty sure I wired everything correctly, because I spended the last 2 days with trying different setups/libraries and I'm out of ideas. Someone got a suggestion to make it initaliaze (I dont use cd4050, I use voltage dividers R1: 100, R2:220) Gives about 3.4V but display works fine. Any suggestion could be helpfull. Thank you in advance
Friendly regards.
As I wrote above. I had a wiring problem. And I use the SD card and Display, but drive the SD card without voltage deviders. Can you please send your wiring.
