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Static libraries and F_CPU
Gents, I have some static libraries I use on multiple different projects (i2C LCD, i2C RTC, UART, etc). In the past, I have almost always used the internal oscillator at 8Mhz on...
Tuesday, 20 August 2013 - 17:39
Unexplained delay required after sei() before USART works
Gents, I have a simple test program: #define F_CPU 18432000UL #include #include #include #include "USART_lib.h" int main(void) { uart_init(57600, F_CPU); sei();...
Tuesday, 13 August 2013 - 17:48
Stretching a 2ns pulse to 100us?
Folks, I have a small problem with the research I am doing. We need accurately timed pulses to fire our lasers (Gemini PIV). With four lasers and each laser requiring 2 pulses (...
Friday, 12 July 2013 - 04:09
TWI with AVR315 strange behavior (to me at least...)
Ok. So I have a hardware setup with three I2C devices that work perfectly fine with a polling driver (based on Peter Fluery's twimaster driver). On the bright side, I DO know...
Friday, 5 July 2013 - 03:42
Using dual I2C interfaces (TWI and software) on atmega?
Folks, Has anyone tried to use Peter Fleury's TWImaster interface in high speed (400k) while also communicating to slower (100k) devices using a different bus and software control...
Sunday, 30 June 2013 - 19:20
Lessons learned and a couple of questions
Gents, I recently fought a few hardware/software battles and actually won! Don't ask me how... But I learned a few things (that I KNOW most of you 1000+ post counters already...
Wednesday, 16 January 2013 - 00:04
Question on rebust 1-wire code
Gents, Once more, I have a question! I have a project (running, thankfully!) that has three (and up to possibly 7) DS18B20 sensors attached in parallel to a single I/O pin. I...
Friday, 4 January 2013 - 04:12
Timer2 not being set in the correct mode
Gents, Once more, it appears I am doing something stupid, but can't figure it out! This time, it involves timer1 and timer2. Short summary: I need four fast PWM outputs to...
Monday, 26 November 2012 - 05:32
Unable to talk to DS18x20s with Martin Thomas' library
Gents, As Shakespeare said, "Once more unto the breach, dear friends". This is a really strange one for me and again, I am having to resort to asking for help here! Background: I...
Thursday, 5 July 2012 - 15:26
Still can't get external interrupts to work!
Quick background: I want to trigger an external interrupt on an atmega168 that is driven by the 1Hz square wave output from a DS1307 (so no bounce or other issues of that type)....
Tuesday, 26 June 2012 - 01:52
Question on libraries and programming style
Gents, I'm not 100% sure where this topic belongs, so if it is in the wrong spot, I apologize and feel free to move it. This is only about the best (or at least, a good) way to...
Sunday, 10 June 2012 - 05:56
Question on PCB layout of MC33932 dual H-Bridge IC
Gents, Another question for you! I'm putting together a test board for the Freescale MC33932 (http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MC33932). The...
Friday, 1 June 2012 - 23:28

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