Therefore we have to make allowances for that in the stm32plus driver and you will see how in the demo code. That is, you can write to them but nothing will appear on the screen. How does that manifest itself? Well, the co-ordinates from 0-31 are not visible. This panel is slightly unusual in that its resolution is 400×240 which is less than the full 432×240 supported by the ILI9327. The ADS7843 is an A-D converter which means that the board should be carefully designed to minimise noise and it seems that not all of them are that well thought out. I’ve had varying luck with the touch screens attached to these cheap boards. The touch screen is compatible with the ADS7843 controller and that can be hooked up to my stm32plus driver. There’s no sign of a step-up DC-DC converter on the board so the white LED’s that make up the backlight must be in a parallel configuration. It’s a familiar 16-bit 8080 interface that is easily connected to the FSMC of the STM32 microcontroller. The seller included the pinout for the display. This is a configuration we often see on development boards sourced from China. There’s also an ADS7843-compatible touch screen driver and an SD card cage. This particular board seems to have the tail soldered directly to it somewhere underneath the panel. It came attached to a handy breakout board, though I have seen others that come with just the FPC tail if you’re feeling adventurous. The panels are typically found in mobile phones LG went through a phase of producing lots of phones with resolutions close to this as did several other manufacturers. The ILI9327 is a driver IC for 432×240 (WQVGA) panels. The code presented in this article requires a minimum of version 3.0.0 of my stm32plus library.
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