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This page mainly summarizes solutions to some main problems during the development of Embest Devkit8500. Hope it would give you some help.

Hardware problem

Why my new bought 7-inch LCD has no display when power on the board?

Answer: This is a very normal problem. Embest default delivery is preloaded with 4.3-inch LCD image. User needs to change the image for 7-inch LCD. Please follow the document "Devkit8500 Quick User Manual.pdf" included in product DVD.

Why the touch screen could not be used when getting into WinCE system?

Answer: When getting into WinCE system, the LCD displays as below, there is no response if using finger to click the center cross. There might be two reasons:
1. The touch screen is resistive touch screen, we suggest user using touch pen to click the center cross not finger;
2. It needs about one second touching for calibration, if touching time is too short, the operation will be invalid.

EmbestDevkit8500 2.JPG

Linux problem

How to debug up-layer audio applications?

Answer: We are using ALSA audio library, please go to its offical website to download relative material. You would better confirm the ALSA version you used on your target board before downloading. Please get into file system and input: cat /proc/asound/version
After you confirmed the ALSA version, please download alsa-utils-xxx from:
There are source codes of aplay, arecord and more others for your reference.