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hi all
i am trying to interface a lcd 16x2 display onto my arm7 board which has lpc2148 and since i am new into arm i have a doubt regarding how do we send and read a data on to a particular port so that it can be dislayed on the display
"how do we send and read a data on to a particular port so that it can be dislayed on the display"
In exactly the same way that you'd read the port for any other purpose!
As already noted, there will be plenty of examples from both the chip manufacturer and the compiler maker...
thanks
hi, we got an lcd code in which they used a PLL which is to generate 60 Mhz clock,why is this PLL used.
well, it can have several functions. the one I know is setting the backlight of the LCD.
The PLL is there because it allows a low-frequency crystal to be used, while still allowing you to run the processor at a large number of different speeds, depending on the actual requirements.
You can run without the PLL too - it will just make the program a bit slower, but the LCD does not need the extra speed.
oops my bad: I meant "PWM", not "PLL"...!