Post Created date
gcc unwanted loop hoisting?
ralphd wrote: jfiresto wrote:... For your amusement, here are the changes it makes to the .s files of a ca. 1K ATtiny24 application: [butler:trunk/Firmware/AVR]% make avr-gcc-3.4...
Monday, 16 March 2020 - 15:29
gcc unwanted loop hoisting?
ralphd wrote:... Given how bad avr-gcc is, I've actually considered writing an optimizing recompiler for binaries.  While it would be fun, I'm starting to think I'm wasting...
Sunday, 15 March 2020 - 11:49
PWM Duty Cycle
It is because fully off (in non-inverting mode) or fully on (in inverting mode) is a 257th possibility that the compare units (in full, 8-bit mode) can not specify. Consider non-...
Tuesday, 28 January 2020 - 20:49
PWM Duty Cycle
You got it: 8-bits can not specify 257 possibilities. The conceptual and operational issue is the PWM units disadvantage one of the 257 possibilities. To get it requires hacks...
Tuesday, 28 January 2020 - 20:16
PWM Duty Cycle
sherifb96 wrote:... I wanted to understand more in depth why the duty cycle has OCR0+1 in non inverting and in the inverting its is 255-OCR0 not 256? Because the 8-bit output...
Tuesday, 28 January 2020 - 19:43
Wire Wrap Wire?
Phoenix Enterprises sells wire wrap wire, tools and sockets.
Friday, 29 November 2019 - 20:30
What was your first micro programming experience?
Kartman wrote:... A friend suggested using a 9602 - this cured the problem. Was the first and last time i used a 9602. I have used the CD4528, CD4538 and CD14538, which were and...
Sunday, 1 September 2019 - 18:45
Radio Shack Solder
I prefer eutectic solder to reduce the chances of moving the joint and creating a weak, localized alloy as the solid solution forms. My hands are not as steady as they used to be...
Wednesday, 28 August 2019 - 07:41
Radio Shack Solder
Thank you for that!   I searched a bit more and found an old datasheet from Edsyn giving a melting range from 183°C (solid) to 190°C (liquid) – so Sn60Pb38Cu2 is non-eutectic.
Tuesday, 27 August 2019 - 12:40
Radio Shack Solder
Kartman wrote:I did find the political discourse interesting - especially the reference to Melman.... "Profits without Production" is a good and prescient read. I probably should...
Tuesday, 27 August 2019 - 07:51
Radio Shack Solder
PIC4Lyfe wrote:Well, I can tell you one unfortunate fact - "Made in America" doesn't mean what it used to. The unfortunate reality is that a number of factors have led to the...
Monday, 26 August 2019 - 20:26
What was your first micro programming experience?
Indeed, if you powered it at TTL supply voltages. Traditional CMOS does much better at 12–18V. Or you can use 4049/4050 buffers which, driving an LED, have minimum sink and source...
Friday, 23 August 2019 - 04:38