Using FIO0PIN1 in LPC2103

Development Boards MicroMod
1

First I’ve been successful in toggleing the IO pins using IOSET and

IOCLR so I know my dev board is working ok.

I’ve connected a LCD to P8 to P15 so I need to write a byte to these port.

In the LPC2103 User manual it says I can write to the port by using the

fast GPIO register like

FIO0PIN1 = 0xA5;

but this doesn’t work. I don’t see any changes on the port.

How do I use the Fast GPIO command so I can write a byte to the port?

2

Did you set the SCS register accordingly for fast GPIO? The legacy registers (IOSET, IOCLR, etc.) are enabled and the fast GPIO registers are disabled by default.

3

Yes, you are right.

Got it working now. :smiley:

Many thanks.