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ATmega8A instructions .lds and .sts versus lds and sts
On a list file, *.lss, generated by AS6, one can notice the following lines:   "ATmega8A" instruction use summary: .lds  :   0 .sts  :   0 adc...
Tuesday, 15 August 2017 - 13:29
Bits of I/O registers as user’s flags
I have ATmega8 I write my MCU firmware in assembly. I usually use the bits of r25 and r24 as flags.   In my last program, UART protocol wasn’t used and I kept it inactive. I...
Wednesday, 10 August 2016 - 13:10
Side effect of RETI?
I mean what could be the possible undesired/unexpected side effect of calling an interrupt service routine by RCALL?   Thank you.
Sunday, 26 June 2016 - 15:26
Resetting just one interrupt flag in TIFR
Do you think there is a simple way to reset just one timer interrupt flag (as TOV2 for example) in TIFR?   I have ATmega8A and I faced this situation while an external...
Saturday, 11 June 2016 - 07:20
Measuring the average current of an acid battery
In a DC to AC inverter set, the in/out current of a battery could be periodic (mainly during its charging) or real DC (if discharged by a DC load, as LEDs connected directly...
Sunday, 29 May 2016 - 15:35
Mains Voltage Versatile Detector
I design a mains voltage (220V, 50Hz) detector to provide, via an optoisolator as 4N35, the real time status of the mains voltage to the MCU interrupt pin (as of ATmega8A that I...
Tuesday, 10 May 2016 - 05:10
Old test in communications, DSB-SC
About 37 years ago, I built, as a test, a low power AM generator. Its output signal was: [1] double sideband suppressed carrier (DSB-SC) and, [2] the frequency of its ‘suppressed...
Friday, 18 March 2016 - 13:03
Raw USB port
To me, USB is rather a black box because I can’t access all technical resources and services that are available to most engineers in the world. So it is impossible for me to...
Wednesday, 13 January 2016 - 06:55
AS6.2 SP1, external interrupt triggered by software
From the datasheet of ATmega8: “The external interrupts are triggered by the INT0, and INT1 pins. Observe that, if enabled, the interrupts will trigger even if the INT0..1 pins...
Friday, 20 March 2015 - 09:02
Current Transformer and Ideal Rectifier
Since I am designing a meter (based on ATmega8) to measure the RMS current (50Hz mains power), I had a look at the application note “Atmel AVR465: Single-Phase Power/Energy Meter...
Sunday, 15 March 2015 - 09:16
Precedence: Definitions and Macros
In building an assembly file (say for ATmega8, by AS6.2 SP1), which one happens first; replacing the defined symbols or the defined macros? In your opinion, which precedence is...
Sunday, 1 March 2015 - 17:38
Copying a project in a solution
In general, there are copy functions for texts, files and directories.   Is it possible, inside a solution (AS 6.2 SP1), to copy a project and giving it a new name?  ...
Wednesday, 25 February 2015 - 15:53