Hello,
I have general question, to which I unfortunately cannot find answer anywhere. I use SMC to manage communication with the LCD display. I have it set up (cycle definitions and peripheral funcs enabled), but I don't know what actually happens when I read/write to the designated external memory area. Lets say I configured SMC1, and I have defined



What happens with read, write and cmd/data LCD signals, when I read/write this address, and address+2 (examples from SAM3S development kit library), for example



Thanks
Entik

Hi Entik,

Can't really find the question in here...

In general, the SMC "translates" the memory read / writes into transitions of Address / Data / WT / RD / CS line.

for example, by writing the following command: LCD_REG8 = 0x01;

the Address lines will be set to: 0x61000000UL
Data line to: 0x01
and the WT and CS lines will be asserted to accomplish the transaction.

iT

Sorry for the shady question, I'll try to be more specific. LCD receives command and data bytes, the difference between them is that one of the controlling wires (named RS, C/D, ...) is low for cmd and high for data. My questions should have been:
How do I influence this? In code from development kit, LCD_BASE address was written to send command, LCD_BASE+2 was written to send data. Why +2? And are there any other functions, when I write to +1, +3, +4, ... address?

Thanks
Entik

Edit: Ok, I figured out something it as soon as I sent this post. The LCD RS wire is connected to A1 pin of the addressing bus, so when I write to 0x61000002 address, this pin is set to 1 and makes the difference between command and data. So no need to answer to this post and thank you for pointing me the right direction...