i have problem with the led blinking. I using the exmaple program given by keil using uVision3. When i run the program, the LED on the development board didnt blink, it just stay on! wat should i do?
thanks!
I have another question, how do I pass value from RFID to microcontroller? Do i need to use another port from microcontroller and connect it to RFID? or both RFID and microcontroller connect to the same computer?
Don't you think that your question requires a description of what type of interface the RFID has, and exactly how you have connected it?
"Do i need to use another port from microcontroller and connect it to RFID?"
If you want to connect the RFID directly to the microcontroller then yes; of course you will need to use some sort of "port" on the microcontroller - exactly what sort of a port will, of course, depend upon what your particular RFID requires!
"or both RFID and microcontroller connect to the same computer?"
If that's what you want then yes; you can do that!
It's your project - only you know the details of what's actually required.
"I have another question..."
Before moving on to another question, have you actually got the LED working yet?
Blinking an LED really is the most basic, foundational thing to do with a microcontroller - if you can't get that working, you are not ready to move on to anything else!