hi Circuit_Designer:
what you mean development tools?
the soft,you can use keil which can download from https://www.keil.com
the hardware ,you can DIY one ,or buy one
the office forum ,you can visit **broken link removed**
any other info,you can search google ,maybe you kown .
Thank your for your reply.In fact I mean I want to build the hardware development tool, it connects to the USB port on PC. I search it on web, but no more pratical information, could you please give me some adivce?