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KMew
KMew
Senior III
November 23, 2022
Solved

GT911 Display Controller: Hardware + Firmware Needed for TouchGFX

  • November 23, 2022
  • 1 reply
  • 4096 views

Hello,

We are looking to use the Rocktech RK070ER9427-CTG, which uses a GT911 display controller for an upcoming custom board we are designing. In the current evaluation board I have (STM32H7B3I-EVAL), they use RK070ER9427-CT, which uses a different display controller (FT5336).

We would like to still use the TouchGFX application to develop the display, but with a different controller and a custom board, I believe it would require significant driver changes and specific hardware. I would like some assistance to develop this as cleanly as possible. I have the following questions:

1) Are there developed drivers for the GT911 so I can use the display with the new controller? I will likely be using the same MCU from the evaluation board.

2) What are the core hardware pieces needed for the display? An MCU, SDRAM and QSPI is what I (think) I have identified so far, but is this all? Or would I need other things?

Thank you in advance.

This topic has been closed for replies.
Best answer by MM..1

Requirments is based on your application, but minimum is one frame buffer RAM for L8 color mode 800x480 bytes , flash for your application plus graphics around 512k is ok for simple app. MCU need LTDC and pins for signals RGB... All MCU with this and high is ok.

QSPI and SDRAM is required only if app plan more as internal resources.

1 reply

MM..1
MM..1
Chief III
November 23, 2022

You mix apple with ...

GT and FT is only touch hw no display.

GT911 is I2C device then read touch events is simple read some bytes from some register.

KMew
KMewAuthor
Senior III
November 23, 2022

Hello MM!

Whoops, you are right. I apologize. I suppose I should reshape my question! I want to incorporate the Rocktech display, which uses the GT911 display controller. I want to integrate the entire package (Display + GT911 Controller) onto my custom board.

So what is the information I should be looking for to determine what all is needed to do this?

Thanks!

MM..1
MM..1Best answer
Chief III
November 23, 2022

Requirments is based on your application, but minimum is one frame buffer RAM for L8 color mode 800x480 bytes , flash for your application plus graphics around 512k is ok for simple app. MCU need LTDC and pins for signals RGB... All MCU with this and high is ok.

QSPI and SDRAM is required only if app plan more as internal resources.

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