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External storage: USB or SD card?
I need to design a board that will have to access external, removable storage of less than 5MB.  The CPU needs to be an AVR with a USART and a handful of GPIO.  The most...
Friday, 20 July 2018 - 18:35
Ateml-ICE fails to enter programming mode in AS7
I'm trying to program an ATTiny85 via Atmel-ICE and debugWire from AS7, but I get an error:   My devices seem to be set up correctly: What might be causing this?...
Monday, 25 June 2018 - 04:54
OK to use a filter cap on RESET when using JTAG?
I'm designing an ATMega32A board, which is programmed and debugged via the JTAG interface.  The AVR042 app note recommends a .1 uF cap on reset unless you're using DebugWire...
Tuesday, 5 June 2018 - 21:33
Reflowing a previously soldered board
In a week or two I'm going to bring up a new board I've designed based on an ATMega32A.  It has a 5V regulator fed from an external 12V supply, 16 MOSFETS, an RS485 driver,...
Tuesday, 15 May 2018 - 15:36
ATMega32A: JTAG vs. debugWire
I'm starting a new design with the ATMega32A.  The chip supports both debugWire and JTAG, and I'm wondering what the benefits and disadvantages of each are.  I'll be...
Sunday, 6 May 2018 - 17:59
Have you ever driven a 16x2 I2C LCD?
I bought one of these inexpensive 16x2 I2C LCDs on Amazon.  There's no documentation, but I figured how hard could it be to get up and running, since I've used UART-...
Thursday, 8 March 2018 - 04:59
Seeking I2C app note code
I'm working my way through AVR315 (now AN2480) and it references TWI_Master.c and TWI_Master.h.  Atmel used to offer source code along side the associated app note...
Monday, 5 March 2018 - 03:51
Unable to connect to Atmel-ICE
I'm doing some ATMega328P development with Jumpstart C and Atmel-ICE on Windows 10.  Everything was working fine up until a couple of days ago when the IDE stopped being...
Friday, 2 March 2018 - 19:37
This is a test - ignore
Sorry.  Testing my malware blocker (Malwarebytes) which hasn't been letting me post here without disabling the entire app, despite the site being whitelisted.   Ed.:...
Monday, 26 February 2018 - 18:33
Unable to connect to AVRISP MkII with avrdude
I'm brand new to avrdude and trying to accomplish my first flash.  I'm on a Win 10 system.  Whether I try to write or verify, I get the same error:   avrdude:...
Thursday, 8 February 2018 - 04:48
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

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