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Discussion Title Created date
Why code this way?
Hello, I am working with a small piece of code that I have basically copied out of the data sheet for the ATmega640. I know what the code does, I just don't know why it is done...
Wednesday, 13 August 2008 - 14:42
SPI interface difficulty [solved]
Hello, I am trying to setup the SPI interface to ouput a series of chars. I thought I would do a small test to make sure I have the bits straight before I fill in the balance...
Tuesday, 12 August 2008 - 21:45
A question about SRAM use
Hello, I am designing a card that is small in size and difficult for my router to complete. Even when I reduce the design rules and route manually I am not happy with the...
Saturday, 9 August 2008 - 17:40
Where do I find linker errors?
Hello, I am working on a project with quite a few large files. Every once in a while the compiler will report that "Object file not found in expected location". The description...
Wednesday, 6 August 2008 - 18:00
Can anyone tell me why this won't compile?
Hello, I have tried this several different ways but the compiler reports "array has incomplete element type" in the header file. It is reporting that the external of the array "...
Tuesday, 5 August 2008 - 23:05
Declaring structures
Hello, I am having trouble with the attached code. The compiler declares that "the array type has an incomplete element type". I cannot determine what is missing. I would be...
Tuesday, 5 August 2008 - 00:33
Trying to use XRAM.
Hello, I am unable to access the eternal RAM memory area with the attached code. I have been through the documentation and I think I have everything in place. When I run this in...
Wednesday, 30 July 2008 - 15:28
Help accessing external ram.
Help!!! I have spent some time trying to enable the external ram interface on the ATmega640. So far its been a lot of reading and no success. The documentation instructs you to...
Tuesday, 29 July 2008 - 15:44
Recommended latch type?
Hello, Can I get away with an HC373 latch when using external RAM? I have seen some threads that mention an AHC latch. Is this required? ATmega640 Clk 16.0Mhz Thanks A
Sunday, 27 July 2008 - 19:21
Can my ATmega640 lock me out?
Is it possible for the 640 to lock you out? I have the 100A part soldered to a prototype quantity board (2). When programing with my in circuit programmer, I made the mistake of...
Friday, 25 July 2008 - 00:18
Help placing data in program memory
Hello all. I am getting a warning when compiling the following code. The warning states that only initialized varibles can be placed in the program area. From what I understand I...
Wednesday, 23 July 2008 - 14:54
Setting clk freq?
I cannot locate how to set the clock frequency in Stdio 4 version 4.14.589. I have checked the documentation and it indicates that on some simulators it is not possible. I had no...
Tuesday, 22 July 2008 - 21:21