i tried many time to read internal timer of arm 7 using LCD or USART but its not giving output. i think , timer 0 is 32 bit and we start that timer it will start form 0 but its not giving me any output
If you dont' get any output the issue isn't with the timer but with your output device.
If you do get output, but nothing is ticking, then it might be a timer issue.
Maybe you should be a bit more clear exactly what issues you have.
By the way - not showing any code and not telling what chip you are using isn't exactly a great way to get help.
"i tried many time to read internal timer of arm 7 using LCD or USART"
You can't read a timer with an LCD or UART!
There are two entirely separate tasks here:
1. How to use the timer - for details, see the processor documentation, and other supporting materials form the chip manufacturer. For this, the LCD and UART are entirely irrelevant.
2. Writing stuff to the LCD or UART - for details, see the LCD documentation, and the UART documentation (part of theprocessor documentation), etc. For this, the timer is entirely irrelevant.
"i think , timer 0 is 32 bit and we start that timer it will start form 0"
What you think is irrelevant - you need to find out for sure by studying the documentation.