Search:

Okay...issue resolved ...thanks everyone for replying , I un-installed/removed all of the arduino ide software, libraries teensyduino ..everything..This computer is only used for coding ,so very...

Yes I'll load up my previous solution concurrently and see what happens .I'll post up the results

Ive had no luck with the newer arduino/teensy combo, Going to revert to the older combination ...

I was running
Arduino1.8.13 teensyduino 1.53

I upgraded to
Arduino 1.8.16 teensyduino 1.55

I have a working project over the last 2 years which has been running on the ILI9488 or the...

I guess this is a 2 part question ...

1. Will 2 audio Rev. "D" boards run on a teensy 4.0 ?

2. Is the configuration supported in the drag and drop audio tool ?

I would only be selecting one...

Well .. I have this display .. but I've not explored it enough to know .. but the current draw is dependent on Supply voltage

Model Current IDD(3.3V) -- -- 450 mA
IDD(5.0V)...

Now if I could get the GT911 capacitive touch controller working I'd be on my way .. but not finding libraries !! ..any thoughts

UPDATE ... of my two 1280 x 400 pixel screens .. The screen I was initially working with was actually defective .. The second screen worked ..
So pulled my hair out working with a bad screen for...

I'm going to take another shot at the gsl1680 ... and try the code you have posted ... I was able to get touch to work but only half the screen was responding.. Thankyou for posting up ..

Where...

I did manage to get the touch panel to work .. but the problem being only 800 X 200 pixels of the panel were supporting touch .. half of the screen would not respond . I could get the panel to work...

I had tried spi clock from 40 MHz fown to 20 MHz then finally down to 6 MHz .. and the screen is the same ..I pulled it apart tonight , but the screen is very dim.. I'll put it back together and...

WOW ... I am at a loss ...LOL .. thanks for the reply ..

Blackketter.. are you configured for 3 wire spi or 4 wire spi .. I'm configured for 4 wire spi

Thankyou for the reply .. I'm struggling with the Ra8876 display which is 7.84" 1280 X 400 pixels and requires SPI for 2 chips on the board SSD2828 is the bridge chip from SDI to MIPI and needs to be...

I know there is an issue with Tri-stating on the SPI buss with RA8875 displays ..

the question I have is if you have 2 devices on the SPI buss that have their own CS lines ...
Is the tri-state...

I am still struggling getting this display to work .. I'm trying to integrate it with the teensy 4.1 ..
I have tried the fork for the 7.84" display under wwatson4506 (RA8876liteTeensy) .. I can get...

I'm running on the t4.0 , the code appears to be running , display is trying to work , lines across the display , I'm currently using this pinout configuration with the T4.0
// Pin connection...

IS there no command to define the screen pixel size? or is it strictly calculated ..?

Okay update .. I switched from the t4.1 to the t4.0 .. I re-did the configuration jumpers a second time ... I have torn graphics on the screen ..colored lines and they appear to be changing...

blackketter .... I'm at the point I had best take your wiring trace ... I was hoping I would not have to ask you this but , Something is not right ..

Thanks
K

Well tried both displays .. Not pulling my hair out yet .. but no luck yet .. This should be running ...but I'm missing something and just have not figured it out yet... LOL

will keep trying .....

No happyness, Built the new supply .. voltage and current are good under load ... Ran an RA8875 off the supply with a teensy 4.1 to test .. all good .... no issues ..

reconnected the ra8876...

Hi Derek, thanks for updating your SDR library ..There are members on my Facebook Group (Keiths_SDR) that are using it for their receiver builds ..Im also running the 2.8" touch panel as well as the...

Thanks for your reply .. Im building up a new supply for my project and will make sure I have sufficient current ...but I did drive it off a supply that could provide 1.5amps .....but I did check the...

I have a scope I'll check the SPI out .... I've just not been able to get to it yet .. I'll post an update...

Okay, glad you saw that first hand ...I could not identify where the message was coming from ..Still no change , can't write anything to display on the screen ....Hopefully someone will chime in.

well for grins and just to make sure I wasn't losing my marbles .. I pulled the Dupont connectors off the display and routed them to an RA8875 display on the bench .. loaded code and up it came...

Look fine by me, but I have to admit this one is a challenge and it shouldn't be .. it's straight up wiring and pin configuration validation ..
So I must be missing something but I can't figure out...

I'm on arduino 1.8.13 and teensyduino 1.53 ....just for the notes

Yes I ran your example ... no luck .. backlight but no display activity

Just tested with your pin mapping (no luck) .. is your display board the rev1.0 version ?

Okay ..
validated the configuration for the second board all is good ...
validated connections from display to teensy ...everything is where it should be according to your pinout list
deleted my...

Not only is it misconfigured , but c25 on the board is not properly mounted ..

c26 on my board after looking at it is not even bridged across its 2 pads its offset by a pad ..!!

I'm going to check my other board out..

for the SPI 4 wire configuration all pins that should be shorted are fine ...
but there are pins that are suppose to be "open" which are shorted.

light touch with my iron and I'll test again

Good call ... its misconfigured ...!!! I'll work through it this evening

Good Idea .. I had not thought of that ...getting complacent.. I've got a number of other displays from them and they came without a hitch ... I have a second 7.84" I could try to rule out a bad...

No problem on the silence, I'm running it off my USB port on my HP workstation.I'll cut it over to my 5v supply... I've run my ra8875s ..4,3" 5" and 7" off usb with the t4.0/T4.1 so more then likely...

Okay, The backlight is coming on for the ra8876 7.84" display. But still can't seem to get text or a screen fill with color ....
I'm running this on a t4.1
is pin 36 on the 7.84" display (2828DC)...

okay .. I feel silly I just realized I dropped the ssd2828.h and .cpp files ..

#include "Arduino.h"
#include "_font_ComicSansMS.h"
#include "ER-TFT0784_t3.h"

// Pin connection mapping
ER_TFT0784_t3 tft = ER_TFT0784_t3(
// Teensy pin // Display pin
10, ...

Blackketter .. Well gave the code a shot .. compiles and loads the demo .. but screen does not respond (Black no activity)... Validated my wiring and matched 1 for 1 for the t4.1 and what you have...

oh wow !!! thanks ... Last time I had looked, the 7.84 was not moving forward ..

I got the display a while back but am somewhere above a "beginner" and certainly below an "intermediate"...

A big thank-you to Greased Lightning ..Ive been struggling with the gsl1680 touch code , and he managed to get me up and running...Ive been on another project and only found today to give it a good...

I have 2 of these buydisplay7.84 "candy bar" 1280 X 400 displays ..

They require SPI for the RA8876

and SPI for the ssd2828 chip .. which needs to initialize communications to the RA8876
(its...

Thanks for the reply Paul, greatly appreciated ..Ill keep the 3.3v and 5 v sorted first ..thanks for the heads up..
K

I'm okay on the pinout, wiring ..no issues. But in the pjrc audio design tool do we just use the standard I2S input ?

Thankyou so much for the link ..I was running through threads back mid 2020 and couldn't get a grasp where things were ..Im cutting over to the t4.1 ..I understand I need 2 spi ports to get this up...

ive been trying to read up on the status of this library and get caught up ..Im currently running an ra8875 4.3" 800x480 display and t4 and purchased the 7.84" ra8876 1280 x 400 display last...

Thanks KurtE.. yes 5206 .. I just couldn't figure out how to redirect to the alternate wire1..and I was goigling and checking out sumotoy 5206 but couldn't find a reference to switching to an...