About TSton

TSton · 2019-08-16

Trying to get a new display board working using STM32CubeIDE and TouchGFX. Processor is STM32F469BI, Display is an 800x480 with 24BPP RGB888 interface. I've also got a 128Mb x 32 external SDRAM for the frame buffer. I've gone through the data sheets ...

TSton · 2019-08-09

I'm trying to get a new display board working. It has an STM32F469, and external SDRAM. Using STM32CubeIDE and TouchGFX to generate code. So far, all I get on the screen is a filled background color, as set it in LTDC settings. No other graphics . Do...

TSton · 2019-09-03

Hi Martin,I tried going back to 38MHz, and locking DMA to front porch, but I still get a scrambled image instead.Terry

TSton · 2019-08-22

Also, I replaced the test boxes on the screen with the actual graphic that I need, a company logo that I can't post here, and now the logo is a jittery mess across the screen. If I lower the pixel clock down to 24MHz, was 38MHz, the image is stable,...

TSton · 2019-08-22

Yes. That is what I expected. I had to manually recreate the screen and didn't make it exactly the same. But about the underrun interrupt. Do I need to worry about that?

TSton · 2019-08-22

Yes. That's what I expect. I had to recreate the screen from the first time I posted it, so it is a little different. But what about the underrun interrupt? Is that something to worry about? Or can I just disable it at startup?

TSton · 2019-08-22

Thanks Martin! I still get an interrupt saying the FIFO underrun error has occured, but then after the underrun interrupt is disabled, it runs as expected. I set a breakpoint in STM32f4xx_hal_ltdc.c to show you where that occurs: /* FIFO underrun I...

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Need help getting display to match TouchGFX simulator.

Only getting background color on the screen. No other graphic images appear.

Re: Only getting background color on the screen. No other graphic images appear.

Re: Only getting background color on the screen. No other graphic images appear.

Re: Only getting background color on the screen. No other graphic images appear.

Re: Only getting background color on the screen. No other graphic images appear.

Re: Only getting background color on the screen. No other graphic images appear.