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Opinion wanted - CAN development resources
What is an ATmegaCAN64/128? The 8 bit AVR chips with CAN controllers built-in are AT90CAN128, AT90CAN64, AT90CAN32, ATmega64M1, ATmega32M1, ATmega16M1, ATmega64C1 and ATmega32C1....
Friday, 7 December 2012 - 03:43
Atmega128 input capture maximum frequency
The absolute hardware limit is found here. From the data sheet timer/counter section Input Capture Pin Source (page 119): Both the Input Capture Pin (ICPn) and the Analog...
Thursday, 6 December 2012 - 21:44
freq. measurement not working well...
slow_rider wrote:I've also noticed that a negative result is possible in the 1st line of the ISR so perhaps I should add abs() to the expression. Better ways to do this?You are...
Thursday, 6 December 2012 - 02:48
freq. measurement not working well...
Both motor_freq and timer0_previous_reading must be declared as volatile (you did not show where else these variable are used in your code). volatile uint16_t motor_freq;...
Wednesday, 5 December 2012 - 19:22
LIN/UART on ATmega32M1
There might be some answers in this recent thread: https://www.avrfreaks.net/index.p... One big difference between the 32M1 UART and other AVR USARTs is the 32M1 LINBTR.LBTn...
Wednesday, 5 December 2012 - 18:45
mil spec AVR's
I have never cared about anything other than the operating temperature range. Someone else will have to answer that. Looking at the parametric table for the ATMEL chips shows a...
Sunday, 2 December 2012 - 22:03
mil spec AVR's
The part numbers are in a separate data sheet: ATmega48/88/168 Automotive Complete http://www.atmel.com/Images/doc7... This is revision J and shows operating temperatures -40 to +...
Sunday, 2 December 2012 - 21:47
mil spec AVR's
SparkyLabs wrote:Now I am afraid that I do have to point out that other chip makers supply the SAME part number in various ranges.DUH! That is the point. ATMEL does supply...
Sunday, 2 December 2012 - 21:09
mil spec AVR's
SparkyLabs wrote:The competition all make anything in -55/125C so on the surface Atmel seem to treat this as a separate thingThat should be worded more likemy suggestion wrote:...
Sunday, 2 December 2012 - 19:37
message filtering at -- software level -- mask & filter
Technically the AVR Rx CANIDM mask registers are only part of a hardware mechanism that is initialized by software. After the software initialization of these register values, the...
Saturday, 1 December 2012 - 19:57
mil spec AVR's
Look at the automotive series AVRs. These are typically the ATMEL extended temperature range chips. Some of these automotive chips have data sheet appendix documents for 150...
Saturday, 1 December 2012 - 13:10
Assembler .set directive question
AVR Assembler User Guide: http://www.atmel.com/Images/doc1... It appears it may do what you want, but probably not. A simple test program would be an easy way to confirm this. I...
Saturday, 1 December 2012 - 12:50

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