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Hi. I need to interface the MCP 4161/4261 digital potentiometers with an ARM based board using SPI.
Does anyone know how to use them and program them using C? Or is there any site that I can use which has tutorials? I've found a few with BASIC but its hard to make head or tail of that code.
I am using the **broken link removed** which is very similar to the Mini6410 and OK6410 boards.
I created an Emdebian system on the board, using the tutorial given here.
I want to be able to access the GPIO ports, I2C and possibly even the keys. I will be writing my program in C.
How d I...
I am working on a project which requires computer interfacing and control. I have chosen a PCI card which has multiple 8255 chips. **broken link removed** That link is a link to the board.
I know that to read inputs and outputs, I will have to use the addresses.
My main concerns and...
I have a few questions about assembly language with PIC. Is there is a commonly used number you can define it like in C like this
VARIABLE EQU 100
But then to assign a memory location to a variable you use something similar
VARIABLE EQU 0x200
Does this mean you can assign a variable the...
so do you suggest i use the keypad without the encoder?
and if i use it without the keypad, can i use it with PORTB, and use the PORTB change interrupt?i guess i can send either the columns or rows to PORTB and then check for change if i use interrupts?
and do i hav to add pull up resistors...
oh!
well, we can connect the keypad directly to the PIC, but then it has to be polled right?and i dont know whether we can afford to be regularly checkin the ports for changes in the keypad...
i have the actual equipment with me, and am using MPLAB and using the C18 compiler..i got proteus...
I have to interface a jeypad amongst other things to a PIC18F452. Instead of using 7 pins i decided to use a keypad encoder, namely the MM74C922N.
As i test i linked up the keypad and then PIC. I put capacitor values of 0.1uF and 1uF for the debounce and read capacitor values, and i supplied a...
proteus help
ok..so i got my hands on a copy of proteus version 7...
i found out how to load on the PICDEM2+ board which is used in uni...and then after an age i found out how to properly load on the source files...
but then when i try to execute it, i get heaps of errors about missing models...
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