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GPIO Waveform edge accuracy?
I'm looking at the 120MHZ ATSAME51J20A for a potentially new design. I need to create custom waveform outputs on the GPIO and I'm wondering what sort of repeatable accuracy can I...
Friday, 9 August 2019 - 20:15
libprintf_flt.a library doc?
Where can I find a document which describes which routines are in the libprintf_flt.a library?   I had it linked to my project for years, but I removed it and I saved 2300...
Wednesday, 25 October 2017 - 02:55
BOOTRST oddity
I have app code and a bootloader. I have merged the .hex files and created a combined .hex and then created a .elf which results in all the fuse and lock bits set correctly when...
Friday, 17 April 2015 - 00:27
Removing interrupt vector table.
In an effort to remove the interrupt table  I added the following to the linker config in studio -nostartfiles -nodefaultlibs and the following code from a very old thread...
Monday, 13 April 2015 - 20:49
Studio compile errors don't link to code.
I use studio 4.18   I've pulled in AVR109 bootloader source when I compile it I get errors, when I click on those errors, nothing happens. If I remove the supplied make file...
Thursday, 9 October 2014 - 15:50
Compilation options and vfprintf
  In my .lss file I see this huge function vfprintf.   What is generating this and how can I get rid of it?   Looking at my compilation options I see all this...
Wednesday, 8 October 2014 - 21:35
AVRISP RS232 Programmer
I have an AVRISP programmer with an RS232 port. I keep as a backup should my AVRISP MKII USB fail. When I click the connection dialog box and select AVRISP, and select the COM...
Friday, 8 August 2014 - 15:45
Bootloader advice
I have been doing some searching for a bootloader for an ATMEGA8. I have found various solutions for PIC and ATMEGA....but I'm wondering if there is some defacto goto solution...
Friday, 25 April 2014 - 17:56
Lock bits and LPM & SPM
Device: ATMEGA64 Recently my code size grew so big that I only have a couple of bytes remaining in flash. Normally I would program the BLB0 and BLB1 as follows: BLB0: LPM and...
Wednesday, 16 October 2013 - 17:23
Integer and floating point math compiling inefficiencies??
Below are two attempts at the same function. The Modified version uses fewer bytes. Why would it compile differently? unsigned char A,C, j,k,z; unsigned char B[] = {1,2,4}; float...
Sunday, 8 September 2013 - 01:56
Dealing with a structure
Let's say you have a structure: struct mystruct { unsigned char num; unsigned char text[5]; unsigned int a; } struct mystruct ms[] { {5,"red",1523}, {6,"blue...
Thursday, 30 August 2012 - 14:58
Global define?
I have a large structure in one file. Other functions in other files want to know the depth of the structure. In the file with the structure, the depth is #define Size = sizeof(...
Saturday, 14 July 2012 - 14:13

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