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Makefile woes
I like to use a standard makefile for all of my projects, where I change a few lines at the top to identify the clock, chip, name, and source files. I have recently learned that...
Tuesday, 25 June 2013 - 15:43
fprintf vs. printf (avrgcc)
I have always used fprintf to write to my serial port, specifying a stream in the statement: FILE comExt_str = FDEV_SETUP_STREAM(usart0_putchar, usart0_getchar, _FDEV_SETUP_RW...
Tuesday, 25 June 2013 - 13:03
MCUSR Register
I'm attempting to write some code so my board knows what type of power up it is experiencing. To do this, I am reading the MCUSR register at startup: void setup(void) { //...
Monday, 24 June 2013 - 19:21
1001st Thread about Piezo transducers
First project w/ a piezo. I need to be able to make a beep at particular times. Because I want to minimize current, I am planning on using a transducer, not a "buzzer" (...
Thursday, 13 June 2013 - 21:41
Simple PMOS Switch not operating as expected (simulation)
I am trying to implement a [roughly] timed pulse for an enable signal. For the following, referred to the attached ckt.jpg. V1 provides an input signal (going from 0V to 7.2V...
Wednesday, 12 June 2013 - 15:31
New IDE: taking the plunge
As a long time user of AVS4.18, I have finally reached the point where I need to upgrade. My latest design has a component that is not supported by AVS4.18 (or WinAVR). A while...
Thursday, 6 June 2013 - 14:55
Power Management (Sleep)
I have a design built around an ATMEGA128RFA1. It will be powered via a battery, so I want to minimize power consumption. I have a prototype board in hand (which works for Rx/Tx...
Friday, 31 May 2013 - 21:37
AVR and Battery
I am unsure if this post best belongs in this forum or the wireless forum (see below). Moderators, please exercise your judgment and move it if necessary. I am working on my...
Wednesday, 29 May 2013 - 15:52
Coil kickback
So this seems like a dumb question, but I would like a second opinion. I am using 12V to power the coil of a relay as well as provide power to an electronic load (read: "sensitive...
Wednesday, 29 May 2013 - 13:30
Timer Reset Question
MCU: ATMEGA1281 Compiler: avrgcc I have a system where a user presses a momentary button to initiate a process. I have a good hardware debounce circuit, making software...
Tuesday, 21 May 2013 - 15:40
LwMesh Behavior Question
I am using the LwMesh stack as a point to point wireless transmission protocol (i.e., no true mesh). I am using it on Atmega128RFA1's. I have successfully transmitted and...
Friday, 22 March 2013 - 16:26
Enhanced Watchdog Timer
After reading the data sheet, I still have a question regarding one of the modes of the enhanced watchdog timer. When configured for interrupt/reset mode, is there any way at all...
Monday, 11 March 2013 - 15:03

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