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Possible to mux 2 leds + rotary encoder?
Is it possible to mux (charlieplexing) LEDs on the same pins poll a rotary encoder?
Saturday, 26 July 2008 - 14:21
T flag only real free bit?
Is the T flag the only real free usable bit in the AVR? (bld/bst/set/clt/bset.)
Wednesday, 7 May 2008 - 14:54
3x4 keypad @ 4 i/o's
How to do double keypress with this 4 i/o trick? For example. If a user pressing [7] and [*] simultainiously.
Tuesday, 8 April 2008 - 16:26
Only one USART, need double RX TX diff bauds
I have only one USART (mega8) available, but I need double control, a 9600 baud and 31250 baud for TX, and for RX RS232 (19200 baud) and 31250 baud. How can this be solved? (...
Tuesday, 25 March 2008 - 21:57
Force single unknown bit in other register
I've got for example this unknown bit. 00100000 Have to change this bitvalue in another register which contains data. For example. 01100000 or 11000000 Thus outcome will be this....
Sunday, 9 March 2008 - 12:21
Unary minus or zero?
.db 0b--1--111,0b--1--111 .db 0b--1--111,0b--1--111 .db 0b--1--111,0b-----111 .db 0b-----111,0b-----111 Quote:Unary Minus Symbol: - Description: Unary operator which...
Wednesday, 5 March 2008 - 15:47
PIN/PORT confusion
sbic PIND, row_B sbic PORTD, row_B Can I use the PORTD as a flag, aswell as PIND? PORTD can still be 0 while PIND could be 1? Right?
Tuesday, 4 March 2008 - 12:23
USART & ATtiny2313 @ 20MHz xtal
Does the USART ATtiny2313 not operate when the clock (from xtal) is 20MHz? Because it will not receive data. In the datasheet I find a 16MHz table. (table 59.)
Tuesday, 19 February 2008 - 13:32
What does the term 'robin' mean?
Quote:XMEGA A1 has a Programmable Multi-level Interrupt Controller (PMIC). All peripherals can define three different priority levels for interrupts; high, medium or low. Medium...
Friday, 15 February 2008 - 15:58
Long wire at an i/o
What for kind of problems can occur when connecting a long (20 inch or so) wire to an i/o with lots of switching LEDs nearby? Is an external pull-up resistor enough?
Wednesday, 13 February 2008 - 16:01
HV on RESET pin when i/o?
Is it also possible to put more voltage on the reset pin when configured as i/o? (13V abs max.)
Tuesday, 8 January 2008 - 21:54
How to limit variable voltage?
How can I limit a variable voltage 0 to 4V at 2.5V, and not limit the current? Can measure the 2.5V with the ADC or the analog comparator. But at 1V the AVR won't run, can I use...
Sunday, 6 January 2008 - 16:19