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2011-03-03 by Leon Heller
On 03/03/2011 13:37, Tim Mitchell wrote: > ----Original Message---- > From: AVR-Chat@yahoogroups.com > [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Leon Heller > Sent: 03 March 2011 12:05 To: AVR-Chat@yahoogroups.com > Subject: Re: [AVR-Chat] Spotted this in my inbox today > >>
2011-03-03 by Tim Mitchell
----Original Message---- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Leon Heller Sent: 03 March 2011 12:05 To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Spotted this in my inbox today > It's also a very slow download for some people. It to
2011-03-03 by Leon Heller
It's also a very slow download for some people. It took me about an hour to get it. I've been playing with it, and it isn't bad. It has some problems, of course, being beta software. It seems to have gone down like a lead balloon with the fanboys on AVR Freaks, mainly because it
2011-03-03 by Geo
Dave McLaughlin wrote: > Spotted this in my Inbox today. > > http://www.microcontroller.com/news/Atmel_AVR_Studio_5.asp When I go to the Atmel site to download it it says it is a Beta version:- no thanks Atmel. George Smith
2011-03-03 by Tim Mitchell
Re: AVR Studio 5 I can only find a beta version (and that's fairly well hidden), is there a full release version? -- Tim Mitchell
2011-03-03 by Eugene
Hi, my colleagues tried it, they reported that it's slow and has new, "heavy" interface. Wants to see more opinions :) Best regards, Eugene --- In AVR-Chat@yahoogroups.com, "Dave McLaughlin" wrote: > > Hi all, > > Spotted this in my Inbox today. > > http://www.microcontroller.com
2011-03-03 by Dave McLaughlin
Hi all, Spotted this in my Inbox today. http://www.microcontroller.com/news/Atmel_AVR_Studio_5.asp Dave... --- Very funny Scotty, now beam down my clothes!!! --- [Non-text portions of this message have been removed]
2011-03-03 by Cat
Thanks for looking Jim, I only show a small section of code... like I said: I know interrupts work because a timer interrupt works. I just found an appnote that says I should read both SPDR and SPSR to "Clear SPI Interrupt Flag by reading SPSR and SPDR" before sei. I don't think
2011-03-03 by Jim Wagner
On Mar 2, 2011, at 9:39 AM, Cat C wrote: > > Hi, > > I have to systems that I need to talk to each other: > 1. An ATMega644 that is the SPI Master, clocked at 20MHz, SPI clk = > CLK/16 (under 2MHz). > 2. An ATMega168 that is the SPI slave, clocked at 8MHz (internal RC). > > The s
2011-03-03 by Cat C
Hello, Am I asking the wrong way? Please let me know, so I can ask better next time. Thanks, Cat [Non-text portions of this message have been removed]
2011-03-02 by Cat C
Hi, I have to systems that I need to talk to each other: 1. An ATMega644 that is the SPI Master, clocked at 20MHz, SPI clk = CLK/16 (under 2MHz). 2. An ATMega168 that is the SPI slave, clocked at 8MHz (internal RC). The setup of 2: void SPI_Init() { //Here we setup PortB to be ou
2011-02-08 by wiyawan sumari
http://d-b-immobilien.de/87403.html [Non-text portions of this message have been removed]
2011-02-04 by Dave McLaughlin
This looks like spam as there is no information about what it is. Dave... --- Very funny Scotty, now beam down my clothes!!! --- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of wiyawan sumari Sent: 04 February 2011 12:34 To: roxyhp2@yahoo.com; AVR-Ch
2011-02-04 by wiyawan sumari
http://www.kdictionaries.com/87048.html [Non-text portions of this message have been removed]
2011-02-03 by Eugene
Hello I have ssd1305 based OLED 128x64 (MultyInno MI12864GO). Indicator datasheet shows that ssd1305 has internal dc-dc to supply OLEDs, but I cant find the way to start it. In ssd1305 datasheet I've found command just to select external power supply for OLEDs and nothing about u
2011-02-03 by Dave McLaughlin
Hi Tim I just had a quick look. As you have the pad for the tab and then thermal reliefs out to the plane, I am not sure you are going to get as good a heat transfer as you would expect. The whole idea of thermal reliefs is to enable good soldering by reducing the amount of heat
2011-02-02 by Dennis Clark
Bummer, none near me. DLC On 2/2/11 9:38 AM, Philippe Habib wrote: > I attended the first stop on the Atmel road show yesterday and if you > can spare a day from work and can make it, I'd recomend it. > > There are 2 sessions. low power and touch sensing. All of it is > hands on.
2011-02-02 by tim gilbert
Steve, It's not the D2PAK but an SOT-223. Same idea though. Tim ----- Original Message ----- From: Steve Hodge To: AVR-Chat@yahoogroups.com Sent: Wednesday, February 02, 2011 9:36 AM Subject: RE: [AVR-Chat] d2pak heat sink Got it. Is that for a D2PAK? Is the rectangle with therma
2011-02-02 by Philippe Habib
I attended the first stop on the Atmel road show yesterday and if you can spare a day from work and can make it, I'd recomend it. There are 2 sessions. low power and touch sensing. All of it is hands on. Cost is $100 and includes lunch and you go home with the hardware. In the lo
2011-02-02 by Steve Hodge
Got it. Is that for a D2PAK? Is the rectangle with thermals there just because it makes it easier to first solder the tab to it and then solder the case to the main expanse of heat sink area? You're right, those are big vias. From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoog
2011-02-02 by tim gilbert
Steve, I can't attach or upload a pdf so I've added an image to a photo album named "JEM Innovation". Tim ----- Original Message ----- From: Steve Hodge To: AVR-Chat@yahoogroups.com Sent: Tuesday, February 01, 2011 9:10 PM Subject: RE: [AVR-Chat] d2pak heat sink Tim, I can't find
2011-02-02 by Steve Hodge
Tim, I can't find the attachment. From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of tim gilbert Sent: Tuesday, February 01, 2011 7:21 PM To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] d2pak heat sink Steve, I've attached a print of the corner of
2011-02-02 by tim gilbert
Steve, I've attached a print of the corner of a board we did this way. Note that the holes are really big, 0.062". I did this to allow for air flow but have no idea what difference it makes. Maybe smaller holes are better? Someday I should try and model this in our 3D CAD. Tim Gi
2011-02-02 by Steve Hodge
Thanks, Tim. Since the tab is ground, I assume you just connect the upper one to a regular ground plane on the bottom? I came across an App Note (#994) on the International Rectifier website that made measurements of the thermal resistance of various SMD packages, using 3 differe
2011-02-02 by tim gilbert
Steve, For such packages, I usually just expand the copper area around the device on both the top and bottom layers. I then interconnect them with lots of large vias. Effectively building a heat sink into the board. Tim Gilbert JEM Innovation Inc. www.jeminnovation.com www.pdksol
2011-02-01 by Steve Hodge
I've been checking out the various heat sinks for D2PAK devices and confess to being confused as to how they are mounted. I'd also like some recommendations, if anybody has any, for ones that are the easiest to use. I need to be able to hand solder things. Thanks, Steve _________
2011-01-31 by Clark Martin
On Jan 31, 2011, at 1:09 AM, Tim Mitchell wrote: > ----Original Message---- > From: AVR-Chat@yahoogroups.com > [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Clark Martin > Sent: 30 January 2011 22:49 To: AVR-Chat@yahoogroups.com > Subject: Re: [AVR-Chat] ATMEGA64L, ATMEGA64 > >
2011-01-31 by Tim Mitchell
----Original Message---- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Clark Martin Sent: 30 January 2011 22:49 To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] ATMEGA64L, ATMEGA64 > On Jan 30, 2011, at 2:25 PM, Tim Mitchell wrote: > > > > If t
2011-01-31 by enkitec@gmail.com
On 30-Jan-11 21:44, Mike Payson wrote: > On Sun, Jan 30, 2011 at 3:32 PM, wrote: > >> What could happen if the clock prescaler is set to 1/2 when using >> the 16MHz crystal @ 3.3V? >> >> > No clue... At a guess that would work fine, but I could be wrong. > > I asked that because
2011-01-30 by Mike Payson
On Sun, Jan 30, 2011 at 3:32 PM, wrote: > What could happen if the clock prescaler is set to 1/2 when using > the 16MHz crystal @ 3.3V? > > No clue... At a guess that would work fine, but I could be wrong. [Non-text portions of this message have been removed]
2011-01-30 by enkitec@gmail.com
On 30-Jan-11 20:38, Mike Payson wrote: > > Most ATMega chips are only rated for 16MHz+ speeds above 4.5V. If you run > below that you are limited to a lower maximum speed. Unfortunately that > tidbit is usually hidden fairly deep into the datasheet, so you really need > to dig to
2011-01-30 by Clark Martin
On Jan 30, 2011, at 2:25 PM, Tim Mitchell wrote: > Some chips work above their rated max frequency, some don't. I had a batch of AT90USB1287 chips which are only supposed to work up to 8MHz at 3.3V, about 95% of them would run fine at 16Mhz. I found this out by accident, I hadn't
2011-01-30 by Mike Payson
On Sat, Jan 29, 2011 at 4:54 AM, ecros_technology wrote: > --- In AVR-Chat@yahoogroups.com, farhan ahmad wrote: > > > Could somebody comment what are the > > pros and cons of using ATMEGA64L-8AU > > with 16MHz oscillator crystal. > > Why even think of this? Just use an ATmega64A-
2011-01-30 by ecros_technology
--- In AVR-Chat@yahoogroups.com, Mike Payson wrote: > ... tidbit is usually hidden fairly > deep into the datasheet ... on the > ATMega64A, if you check page 344 of > the datasheet you see that it is > only rated to 10MHz at 3.3V ... Well, thank you very much for pointing that ou
2011-01-30 by Tim Mitchell
Some chips work above their rated max frequency, some don't. I had a batch of AT90USB1287 chips which are only supposed to work up to 8MHz at 3.3V, about 95% of them would run fine at 16Mhz. I found this out by accident, I hadn't read about the 8MHz limitation in the datasheet...
2011-01-29 by ecros_technology
--- In AVR-Chat@yahoogroups.com, farhan ahmad wrote: > Could somebody comment what are the > pros and cons of using ATMEGA64L-8AU > with 16MHz oscillator crystal. Why even think of this? Just use an ATmega64A-AU, which is rated for 16 MHz operation from 2.7 to 5.5 volts. Graham.
2011-01-29 by Dave McLaughlin
What about buffering the SD from 5V to 3.3V. I have done this and it works fine. Allowed me to run the Mega at 16MHz at 5V and still use the SD at 3.3V. Might be easier than trying to find a faster CPU at 3.3V. Dave... --- Very funny Scotty, now beam down my clothes!!! --- From:
2011-01-29 by farhan ahmad
Hello All, I just want to have feedback about some tests made by me. I have been working with ATMEGA64L. ATMEGA64L-8AU (Vdd=2.7V to 5.5V) works with 8MHz external crystal oscillator as stated in the specification. Since I am using SD card and I am extracting data from SD card and
2011-01-29 by Eugene
Hello you can add 3v3 ldo linear regulator to power SD and justify logic singal levels (phillips appnote AN97055) or apply integral levels shift IC and use your atmega at 16MHz with 5V power supply. If you need faster solution, you could use arm7 or cortex for example with great
2011-01-26 by Chuck Hackett
> From: Don Kinzer > .... > As I read the documentation, this option is superfluous if -Wall is given. > > To get warnings to be treated as errors (probably a good idea), use > -Werror. With -Werror several compiles fail because of: "c:/winavr-20100110/lib/gcc/../../avr/include/u
2011-01-26 by Chuck Hackett
Thanks to all for your help on my possible conversion from the ATMega32A to the ATMega644. I took another look at my application setup and decided to remove FreeRTOS due to the fact that: 1) This application didn't really need it, but I was using the opportunity to learn about Fr
2011-01-26 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" wrote: > "Compiler optimizations disabled; functions from > won't work as> designed" Clearly, you can't use the delay.h macros/functions without optimization enabled so if you insist on having optimization off, simply comment out t
2011-01-26 by Chuck Hackett
I ended up chasing a bug because I had not noticed that one out of sixteen compiles in a rebuild issued warnings about implicit function declarations which, of course, caused an invalid calling sequence to be emitted. I thought I had set up the compiler options to treat this as a
2011-01-26 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" wrote: > -Werror-implicit-function-declaration As I read the documentation, this option is superfluous if -Wall is given. To get warnings to be treated as errors (probably a good idea), use -Werror. Don Kinzer ZBasic Microcontrolle
2011-01-25 by ecros_technology
--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" wrote: > This means that I will have to upgrade > to a new JTAG adapter. Since the ICE-Cube > has served my needs well ... Mike Payson is correct in his analysis. The AVR ICE-Cube, as a "clone" of the original Atmel JTAG ICE, suppo
2011-01-25 by Cat
Basically the only thing that was NOT wrong (in my interpretation), was that: if INT0 was enabled and triggered when there was no handler for it, it generated a reset (can't tell if directly). The rest... side effects of things tried to debug through ISRs, etc.; my bad. Cat -----
2011-01-24 by Cat C
It looks like some of my interpretations were wrong, please ignore until I say more. Thanks, Cat ---------------------------------------- > To: avr-chat@yahoogroups.com > From: catalin_cluj@hotmail.com > Date: Mon, 24 Jan 2011 15:05:39 -0700 > Subject: [AVR-Chat] Strangest thing:
2011-01-24 by Cat C
Hi there, I'm using an ATMega168-20AU to read a temperature sensor connected to PD2 (INT0). The sensor sends it's data every second without being requested, so I chose INT0 to read it in an ISR whenever it sends it. SO: 1. It doesn't work; and I don't expect it to work first try,
2011-01-24 by Steve Hodge
Duh. You are right. My brain must be suffering from data sheet overload (or underload?). Steve From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Tim Mitchell Sent: Monday, January 24, 2011 6:59 AM To: AVR-Chat@yahoogroups.com Subject: RE: [AVR-Chat] IS
2011-01-24 by Steve Hodge
Thanks. Just out of curiosity, do you know why Atmel didn't just call this "ISP", with a clear section heading labeled such, like in many other data sheets? This is my first excursion into the Tiny's. Is this characteristic of Tiny's? Steve From: AVR-Chat@yahoogroups.com [mailto: