Aynone used buydisplay ra8875 with flash ??

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umutgemisi

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Hi i bought buydisplay 9" display ra8875 and arduino shell. i m sending the images to tft via sd card is very slow and i want to try flash chip, backside the screen there is a an empty flash area. i bought 25q128fv flash chip for tft not soldered and have a programmer for 25q128fv. im searching a simple example for use that flash to use only view images to screen with uno or stm32f103cb (maple mini) are there any friends have an idea??
Thanks
 
1- here is link that screen http://www.buydisplay.com/default/s...-tft-lcd-touch-shield-ra8875-for-mega-due-uno
yE3Gl0.jpg

Thats behind the tft here is for 25Q128FV flash
ALkOg7.jpg

thats flash programmer i used to
Lynvg1.jpg

and thats for im trying for arduino uno and trying for stm32f103cb (maple mini clone)
i use the first arduino its a sd card slot on shield for arduino (its betwwen uno and display) image show is very slow with sumotoy ra8875 library
https://github.com/sumotoy/RA8875
and second one is 4 wire connected to maple mini with Adafruit_RA8875 library
https://github.com/adafruit/Adafruit_RA8875
i think no need to use sd card for image view i can program the images to flash chip converting with raio bmp to bin converting software all bmp files is converting to "AllPic.bin"
http://www.raio.com.tw/Data/Datashe.../RA8875_DemoProgram/BCB_RA8875_AP_Release.rar

and i havent any code example i m searching about example so much but nothing found any to show images on screen using that flash :(
Buydisplay send a code for use chip but its 8051 keil v4 project. i cant convert it 8051 different
have anyone idea?
 
This is not actually a teensy related project is it, since it looks like you are using a classic Uno and a Maple clone? So this may not be the best place to get answers on how to create custom code for the displays?

Have not used the displays but first problem is that you are driving a very large display with very underpowered micro controllers. A teensy 3.2 could make a go of it, hence Sumotoy's library but if you want easy user interface at 800*480 pixels you really need to look at single board computers like a Pi, which have dedicated display hardware and easy to use libraries.

It's certainly possible, as per the Uno you have to drive one of these, but to do useful things with that many pixels you either need clever code or more processing power.
 
yes but they are sending me 8051 mcu keil v4 project. factory producing tft screen and slot for flash chip but any example how to use flash nowhere :(
 
sumotoy said:
After long development process (mainly going around tons of chip bugs) the library for RA8875 it's almost usable:
https://github.com/sumotoy/RA8875

Recently I added support for user fonts that render fast, but library support almost all RA features including internal fonts, ROM fonts, SPI Flash. Of course it works really fast with all Teensy's and it's fully compatible with Audio Board.
Apart the infamous bugs, the RA885 chip it's the only one that let you drive large displays (max 800x480) with touch screen and using very few processor resources.
Actually the only drawback it's send images fast due RA hardware limitations and use a SPI isolator circuit if you want to use other SPI devices.
Here's a pretty exaustive wiki https://github.com/sumotoy/RA8875/wiki
Click to expand...

Writing supports flash but any any any example :( are there anyone help me please im searching that for 1 month :(
 
RA8875 5'' inch display is not getting Power-on

Hello,
I am using "5 inch TFT LCD Module 800x480 Display w/Controller I2C Serial SPI" in one of my project. Communication interface is 4 wire SPI. I have ordered the display with 4 wire SPI mode, after receiving the display i have not made any changes to the hadrware. Just soldered one connector for SPI connectivity with microcontroller. Display is 3.3V.

I am using SAMD21J18A xplained pro board as my development board. Configured for 8MHz clock.

I have initialized the TFT and SPI communication. But, i am unable to see any thing on the TFT display. When i probed SCLK and chip select(CS) i could see signals in oscilloscope. On MISO able to see signals but little distorted. But MOSI is completely high.

Herewith I attach the initialization code i written for TFT along with this post.

I request your help, to identify issue with my code or any modifications i have to do wiring or other settings.

Thanks,
J. Chandra Sekhar
 

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  • TFT_Initialization.txt
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Double posts won't help you, espcially in the wrong forum :)
Please ask in a forum that supports your ATMEL-mcu.
 
This is indeed the wrong forum for your SAM21 question! You're not even using anything that looks like any of the code published by PJRC or others for Teensy boards. It's completely different code (without the functions like TFT_CmdWrite shown).

Ask your Atmel board question here:

https://community.atmel.com/atmel-smart-arm-based-mcus

Edit: when you do ask on Atmel's forum, double posting only annoys people who might be willing to help you. Stop it. Instead, put more info in your message, like the complete code and photos of how you really connected things. Good info in your question and photos or other material showing the effort you have actually made increases the odds someone can and will help. Good luck.
 
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