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How to flash an AT90S8515?
So I have a project from 2003 that I need to update.  It was based on the then state-of-the-art AT90S8515.  I still have the C code for it, and it still compiles, but I...
Thursday, 8 February 2018 - 01:31
Do crystals consume power?
I'm working on a design for a battery-powered, AVR-based clock.  It's my first battery-powered project so I'm drilling down into power consumption more than I usually do....
Sunday, 21 January 2018 - 06:02
Seeking RTC suggestion
I have a low-power display clock application.  I'd like to keep the MCU sleeping until awakened by a time update interrupt every minute, at which point it will update the...
Saturday, 6 January 2018 - 06:38
Seeking suggestions for terminals for quick-swap battery
I'm working on a project that's going be using one of these 12V batteries (dimensions are 7.07" L x 1.40" W x 2.42" H).  I'm going to keep it in a tray that allows it to be...
Friday, 15 September 2017 - 01:08
Will AVR-ISP MkII source current to target?
I'm developing an Arduino project based on the ATMega328P.  I'd like to eliminate the bootloader to speed startup, which means programming via some sort of ISP.  Since I...
Wednesday, 6 September 2017 - 21:45
Trying to avoid JTAG conflict with ATMEGA6450
I'm using the 6450 in an application that requires every single IO line, including the JTAG ones on port F.  Those particular pins read some DIP switches via the following...
Monday, 3 July 2017 - 19:55
Is it possible, in C, to create an array of arrays of sructs?
I have a struct.  I also have several arrays of different lengths (stored in flash) containing instances of this struct.  Is it possible to create an array of these...
Wednesday, 10 May 2017 - 20:33
Trouble interpreting compiler asm
I have the following code in my ATMega 6450 program:   x = read_fuse(); // Read fuse high byte to check OCDEN if (x & (1 << OCDEN) != 0) { ... The...
Tuesday, 14 March 2017 - 02:52
How to read ATMega6450 fuse bits from program
I'd like to read the fuse bits (specifically OCDEN) in an ATMega6450 from the program running on it.  Possible?  If so, how?  Thanks.
Saturday, 11 March 2017 - 20:28
Best way to set or clear a single bit in a control register
I'd like to manually reset the TOV0 bit for timer0 in an ATMega6450.  The datasheet says to write a one to it.  It seems to me the way to do this without affecting other...
Wednesday, 8 March 2017 - 19:42
Seeking solder/flux recommendation
My standard soldering "recipe" is Kester 245 flux cored solder with Kester 951 liquid flux.  Most of my work is SMD by hand (little through-hole, no reflow).  My goal is...
Tuesday, 27 December 2016 - 01:17
Atmel-ICE + AS6.2 + ATMega6450: Unable to enter programming mode
I'm trying to bring up a new board of mine based on an ATMega6450.  I'm running AS6.2 on Win7 x64 with Atmel-ICE (current firmware).  A week ago I was able to write to...
Tuesday, 29 November 2016 - 05:08