Version:0.70b10 not working

[prathapchandra]

first of all, thank you for your work on this immensely capable library

i am pulling the plug too early, sorry about this i have a set up where my DUT is communicating with Arduino UNO and sending some data. i am trying to demonstrate the DUT capabilities using a 5" LCD (800X480) along with Adafruit RA8875 breakout board (both purchased from Adafruit) the set up works fine with Adafruit library , but am not able to get your "basic-setup" code to work . all i am getting is a silver screen the RA8875 is acknowledging that it is being activated i am trying to look into your .h and .cpp files to find out if i need to tweak something to fix the issue any help will be highly appreciated

thanks again -Prathap

[sumotoy]

i'm still in vacation so I don't have the stuff with me. Once back I promise to look at this. I have tried before going vacation with a custom board with Mega2560 that can work at 3v3 and it was working, this CPU uses code compatible 100% with UNO so it should work, but I have tried not the Adafruit board. The Adafruit board uses a RA GPIO port to turn on display and a level converter, when you connect the stuff you get a black screen then goes silver? There's a major update for this library I'm near to publish sometime in september, many new features and full user font support plus optimized low level SPI routines for all CPU's

[prathapchandra]

thanks for your reply and sorry to disturb you on your vacation the screen goes directly to silver or rather white-out

[sumotoy]

this mean no SPI communication, I will check next week but in the meantime please double check your connections and try again!

[prathapchandra]

hello hope you had a fun filled vacation I am still not able to get your code to work, I need to upload bitmap images to the LCD, and am using a SD Data logger from Adafruit. the code provided by Adafruit takes 80s to load a 24bit depth 800x480 screen i was hoping your code could achieve rendering the data faster, as my understanding is that you are using highest possible speed on the SPI bus. when i run the SD test sketch , the serial monitor says that RA8875 was detected and that the image was detected and its size and also the turn around time, however, as is the problem statement, I see nothing but a white screen. one observation though, when I tried to load "Alert.bmp" the screen would blink, as if being turned on and off periodically. Any thoughts would help thank you

[sumotoy]

Yes, I'm just back from vacation, thanks.

I just checked mine 800x480 eastrising with a MEGA2560 board at 3V3 volt, the adafruit should be same (apart a GPIO for turn one screen that I already manage on library), just run the benchmark and...works. 1) Before attach SD holder, have you tested the display with UNO directly? 2) How you are powering up the display? From UNO?

Before attach SD you have to be sure that everithing works, the 800x480 use a lot of current and library initialization power it up with the max values (the adafruit library not), some user had the same problem, try to connect a voltmeter and check the voltage of the display during all power-up, if it goes under 4,50V it's not sure the onboard regulator can supply 3v3 and the RA goes in limbo state where it doesn't do nothing.

[prathapchandra]

1) Before attach SD holder, have you tested the display with UNO directly? Yes, the LCD works just fine with rectangles and triangles (Adafruit library)

2) How you are powering up the display? From UNO? Yes, 5V output from UNO

I didn't notice any loading on the 5V source from UNO, to be certain i hooked up a DC power supply with 8V as input power supply, I still see the same screen

i am seeing the below message in the serial monitor for benchmarks sketch

screen:800x480 - rotation:0 Benchmark Time (microseconds) Screen fill 20492 Test Pixel 200 Test Pixels 134928 Text 2493536 Lines 4565016 Horiz/Vert Lines 5452768 Rectangles (outline) 1696760 Rectangles (filled) 1697780 Circles (filled) 677796 Circles (outline) 397152 Triangles (outline) 988136 Triangles (filled) 962472 Rounded rects (outline) 10016780 Rounded rects (filled) 10016764

with a white out screen, looks like RA8875 has got some timing parameters offset with this particular LCD

[sumotoy]

I have prepared a CD5050 board to connect an arduino uno board to my 800x480 and tested and...even this works. Can you please take a picture of the display and give me the details? Not the board, just the display.

[sumotoy]

In the meantime I have almost ready a new version of the library that has been extensively tested with many MCU's (included UNO and DUE), it has a new font management that can handle many user fonts.

[prathapchandra]

below is the LCD that i am using https://www.adafruit.com/products/1596 thank you

[sumotoy]

It looks a 800x480 5" and not 7" so it should not consume a lot... I have asked to another user that has an Adafruit board with a 5" to check current library and he confirm that works, I've tested with a uno two different eastrising 5" and 7", both 800x480 and works. At this point and since your display works with adafruit I have to see how you are initializing the display, can you post only the setup code (any, just want to see how you are trying to initialize and which pin you are using, etc.) I have a video proof that it's working with a nano board and the 800x480 7" and 5", the two display uses the same parameters, it's prolly a software configuration error. I close the issue but you can still post here and I'll try to solve the problem anyway.

[prathapchandra]

Hello am using Arduino UNO Pin 8 for CS of the RA8875 breakout board and the Pin 10 as CS for the SD card data logger.

rest of the drivers is directly from Adafruit thanks

[sumotoy]

....I was asking the what there's inside:

void setup(){ //please post the code you have here }

[prathapchandra]

void setup() { Wire.begin(); // join I2C bus (address optional for master) Serial.begin(9600); // start serial communication at 9600bps

if (!tft.begin(RA8875_800x480)) { Serial.println("RA8875 Not Found!"); while (1); } Serial.println("Found RA8875");

xScale = 1024.0F/tft.width(); yScale = 1024.0F/tft.height();

tft.displayOn(true); tft.GPIOX(true); // Enable TFT - display enable tied to GPIOX tft.PWM1config(true, RA8875_PWM_CLK_DIV1024); // PWM output for backlight tft.PWM1out(255);

HomeScreen(); //Initialise the LCD to display the Home Screen

pinMode(RA8875_INT, INPUT); digitalWrite(RA8875_INT, HIGH); tft.graphicsMode(); tft.touchEnable(true);

Serial.print("Status: "); Serial.println(tft.readStatus(), HEX); Serial.println("Waiting for touch events ..."); } this is the working code please see

[sumotoy]

prathapchandra, I strongly suggest you to read the wiki before claim that not works! The adafruit library work out-of-the-box only for adafruit products but this library has been designed for all spi drived RA8875 so it has more options to adapt different brands. In the initialization you can use:

RA8875_480x272, RA8875_800x480, RA8875_800x480ALT, Adafruit_480x272,<--------------------- Adafruit_800x480 <---------------------

Guess what you will use?

...if (!tft.begin(Adafruit_800x480))...

[prathapchandra]

aargh.. it works now.. apologies for the confusion i used Adafruit_800X480 and it works great the visuals are just what i wanted i wish i could have solved this issue three weeks ago nevertheless, i appreciate your passion for helping others

[sumotoy]

no problem. But read wiki, there's very important infos about use this chip with other SPI device!

[prathapchandra]

I will thank you