A company that makes microcontrollers and other chips, most popularly the AVR line of ATMega and ATtiny. These chips are the basis of the popular Arduino line of prototyping platform boards.

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Use arduino uno to program the on-board atmega328 in C [migrated]

I have an Arduino Uno board. I have seen how it is possible to program external AVR's through the Arduino Uno board, for instance an ATtiny. But I'm starting with c for atmel µc and I just want to ...
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1answer
23 views

How to configure the SPI pins(MOSI,MISO,sclk and SS) for ATMEL ATSAM3X8E?

I am using ATMEL studio 6 for programming and novice in embedded systems.At present, I have read the theory working of SPI. I understand that I have to set particular bits to one in the control ...
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0answers
32 views

Programming multiple ATmega32U4 devices at once without USB

I have a bunch of Atmel controllers which are identical and run the same program. While developing i need to mass program all controllers somehow. The only way they are connected is via I2C. And ...
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7 views

ATMega328P-PU and 328P-AU [migrated]

im planing to make my very own arduino design based on the Arduino PRO mini. I picked this board instead of the UNO mostly because it's way more simpler compared with the UNO since the USB-to-Serial ...
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1answer
42 views

5V I/O Chip Which Works Like An Atmel µC Port? [closed]

I'm working on a project with a 5V vintage 8-bit microprocessor, which I would like to hook some I/O to. I'd like to find a nice little package that could help me with this. I'm happy if it is a ...
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2answers
65 views

Shut down Atmel µCs

I was wondering if it is possible to shut an atmel microcontroller down with a software command? I want to shut my controller down either via a remote command via USART or if an internal error happens ...
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1answer
25 views

Programming an Atxmega for using UART

I started to write a program for an ATXMega. This program should read a command via USART, and then execute this command (i.e. either sending data via SPI or sending data back via USART). But the µC ...
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19 views

SAM9X25-EK: USB connections doesn´t come up

I bought a SAM9X25-EK evaluation board and connected it by usb (port a) to my pc. The board is also connected to the power supply. As described in the manual (doc111115.pdf) the board should appear as ...
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12 views

BMA150 acceleration sensor for SAMD20 SPI connection

I'm trying to get BMA150 acceleration sensor working with my user board which has SAMD20J16 connected to the correct pins. (I'm sure, I've quadruple-checked) I've been stuck for several days trying ...
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1answer
110 views

Atmel printf formatting doesn't work, no formatting does work

We are running an Atmel AVR32 chip on our board, and recently discovered that printf with format/conversion specifiers doesn't work. A regular ...
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1answer
30 views

How to use the simulation in atmel-studio properly?

I wanted to start a bit µC development with the Atmel Studio 6.2, and therefore my first step was to compile a small program for simply switching a pin from HIGH to LOW and back all the time. I took ...
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1answer
50 views

Atmega32 LCD program not working

i have recently been into atmega world after i heard it is much better than pic and it is my second tutorial about writing to LCD i wrote this program in atmel studio but it doesnt work i double ...
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1answer
26 views

ATSAM functionality

I checked the datasheets and the overview pages on Atmel's site for these ARM cores, and I think they are amazing. Especially looking at the ATSAMA5D41, this would go well with a project I am working ...
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1answer
51 views

How to program enc28j60??

I read enc28j60 is unprogrammable directly from the computer but it has registers that I can program so how can I excactly do this.. is it programmed from the mcu connected to it through spi or is ...
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2answers
68 views

Use or remove reset capacitor?

I am currently connecting an AVR ATXmega 16A4U in my circuit. According to AVR (http://www.atmel.com/Images/doc8278.pdf, p6) the external reset circuit should look like simulate this circuit ...
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1answer
30 views

How to select external crystal in atmega162

How to set AVR to select external crystal for clock? A _delay_ms(1000) is producing a quick beep however it should produce 1 sec beep if it is operating on 12Mhz. Could it be done programatically of ...
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2answers
51 views

Using Atmel Software Framework

http://www.atmel.com/tools/avrsoftwareframework.aspx?tab=overview In my company there is a project, depending on this library. However, it is used by copy-pasting some .c and .h files into the ...
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1answer
75 views

VHDL - address comparison yields wrong result

I am developing TS-CAN1 emulator on Atmel's ATF1508AS. One part of an application is an address decoder implemented as follows (only interesting parts are left): ...
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36 views

RFID interfacing with atmega162 problem

I have interfaced RFID and atmega162 as in picture , but I am getting garbage with blank spaces, hypens on lcd , please see my code and tell me whats could be the problem, Hoping for your help. ...
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22 views

RFId interfacing with atmega162

I am new to programming, I have created a schematic of my project I am not sure it would work or not. I have RFID 125khz - Model no RFID6300. Do this module require MAX232 to be used in between ...
2
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1answer
178 views

How can I design my PCB in a way I can debug the Atmel microcontroller on board?

We are designing a board around Atmel SAM4E microcontroller, and use Atmel-ICE for debugging/programming. To save space, we would like to avoid including the whole ICE connector. Which are the minimum ...
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1answer
44 views

Buzzer not working with delay avr atmega162

Hi I have got a problem that will be simple to you guys but i am newbie so its difficult for me to get things done correctly, I Have buzzer interfaced with PinC0 of atmega162 , with crystal 12MHz ...
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50 views

Atmel EDBG External ARM Target

I am looking to program one of Atmels 802.15.4/ARM Cortex-M0+ chips and would like to know if it is possible to do through Atmel Studio with the help of the EDBG on a Samr21 xplained board. I have ...
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37 views

What image sensors can I use with Atmel's ISI interface on a SAM9G25?

Atmel's SAM9G25 includes an "Image Sensor Interface" peripheral, which is nicely documented, and "...can be used to connect various image sensors". What I am struggling with is: 1) How do I find ...
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39 views

DAC via I2C: detect error conditions

We are using a MAX517 DAC-device as slave and an ATmega8535 controller as master. Communication errors can be readily detected by comparing (TWSR & 0xF8) with 0x08 for Start, 0x18 for address ...
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2answers
71 views

Wired communication from 1 atmel to many nodes

Right now i am looking for a better way to communicate to our wired nodes in a project that we are working on. Currently there is 1 main node that all other nodes talk to that in turn handles all ...
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3answers
375 views

Find first pin of a LQFP chip

I have bought some ATSAM4E8C chips in LQFP 100 package. The datasheet shows that the IC should have a dot indicating the first pin, but mine have two dots. One larger in the corner, and a smaller ...
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1answer
50 views

Interacting with the host OS

I am wondering if an ATMEL micro controller such as an ATMEGA8 or ATTINY2313 has libraries to interact with a computer (windows OS) over USB? If so is there any premade libraries that does the bulk of ...
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44 views

AT32 UC3a3256 connnection problem

I've built a custom board containing an AVR AT32UC3a3256, I'd like to program it using the JTAG connector from the Atmal JTAGICE mk2. When I try to connect it I can't read the JTAG id, it always gives ...
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6answers
500 views

WLCSP MCU's - what hardware is needed for programming these tiny chips?

I just received my DigiKey order of some Atmel ATTiny4 MCU's from DigiKey. I wanted to tinker with one of the smallest MCU's I could find, and this was one of them. It is, in fact, so small because ...
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1answer
91 views

Understanding capacitor usage in the Sparkfun arduino [duplicate]

In the schematic for the Sparkfun Arduino mini pro 3.3v https://cdn.sparkfun.com/datasheets/Dev/Arduino/Boards/Arduino-Pro-Mini-v14.pdf there's a 0.1uF capacitor (C3) just left of the atmega ground ...
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1answer
54 views

1-wire in ATMEGA1281 problem

Could someone help me with something like this? I wanted to add DS18N20 thermal sensor (http://datasheets.maximintegrated.com/en/ds/DS18B20.pdf) via 1-wire interface and when I'm trying to connect it ...
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45 views

AT91SAM9260 Does not recognize 128 MBytes SDRAM

Recently began to use AT91SAM9260 processor on the Olimex board. From the data sheets of the processor, it seems to support up to 256 MBytes of SDRAM. So I replaced both of the old K4S561632C-TC/L75 ...
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1answer
96 views

Arduino - receive Ethernet W5100 signal to multiple arduinos

I'm after doing a device in which I'll use 4 AtMega328 chips; Since they'll all be mounted on the same PCB, and I need an ethernet connection for them, I was wondering if there's a way to share the ...
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1answer
101 views

Atmega328p Circuit Blinking Circuit

So I am trying to build a standalone circuit using the Atmega 328p. After uploading the code using Atmel Studio and AVRDude I get no response from the circuit; however, when I take the Atmega and put ...
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75 views

Using Atmel-ICE hardware debugger

A while ago we had a project and wanted to program Atmel microcontrollers. Since the project stalled after some time, we never did anything with it. So here it is, lying on my desk this sunday and ...
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1answer
51 views

The difference between Atmel ATmega16u2-MU and -MUR

What is the difference between ATMEGA16U2-MU and ATMEGA16U2-MUR? Atmel lists these 2 codes in the table on their product page but I could not find any explanation in the datasheet.
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1answer
125 views

Moving to ARM from 8 bit AVR - how to take the 1st step?

I write code for AVRs for several years now and it seems like my needs are calling for a more powerful processor. Since Atmel Studio is the IDE I'm already using and my debugger also works with ARM ...
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1answer
278 views

ATMEL's ARM programming without ASF

I want to make an introduction to "arm programming" without using Atmel Software Framework. That is which i don't know, it's the definitions of chip's peripherals. For example: How can i refer to a ...
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1answer
52 views

Alternative to Atmel programmers [closed]

I am currently using the Dragon AVR to program ATMEGA88 chips on board using ISP I/F. My problem is that it seems somewhat flakey. Is there a reasonably cheap non-Atmel alternative? Ideally a more ...
2
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1answer
48 views

Atmel and coil close on a board - is interference an issue?

I'm going to build a circuit which uses AVR uC (probably ATmega8 or some ATtiny) and a coil with iron powder ring core. The coil has 330uH and will be working under current of approx. 6A. I'd like to ...
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2answers
70 views

Register Syntax question

I was reading some code to use an on an arduino ATMEGA328P and I can't figure out what this line of code does. ASSR &= ~(_BV(EXCLK) | _BV(AS2)); I know that ...
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2answers
221 views

Tie Arduino - ATMEGA328P reset pin directly to +5V?

I would like to know if it's okay to tie the reset pin on an ATMEGA328P directly to +5V without using a resistor to avoid random resets and lower part count. If it's not okay, can you explain why it's ...
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2answers
57 views

Inverted PWM with ATTiny10

On a 10MHz ATTiny10, the following code generates the same 40kHz 50% duty PWM on both pins 0 and 1: ...
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1answer
114 views

What is the best way to interface ST7066 lcd controller with Atmel SAM4E

I am trying to interface ST7066 LCD controller with Atmel SAM4E MCU, but is quite confused about the best way(Least no. of pins used) to interface them together. Should I use GPIOs or Should I go for ...
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376 views

ATTiny85. How do I use the reset pin as an analog input or digital output?

According to this datasheet, the ATTiny85 has 6 I/O pins if we include the reset pin. I used five of them to charlieplex 18 LEDs and I need another one to use as analog input. Would it be possible to ...
2
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1answer
86 views

ATmega328A UART: everything working, but not as expected

I am trying to get UART working via the ATmega328A. I want to enter a character, and get that character to be printed out. However, when my code is run this is what happens: I enter one character, ...
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46 views

EVK1104 & Atmel Studio 6.2

I have an evaluation board EVK1104 for 32-bit Atmel Processors AT32UC3A. I have checked in AVR Studio and there are some example projects for EVK1104. Therefore I thought I can use AVR Studio 6 for ...
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1answer
103 views

Solder mask for 0.5mm pitch TQFP

I'm using Atmel SAM chips and the data sheets don't have any mention of solder mask clearance for their TQFP packages. What would be a nominal pad/solder mask opening/cream size for a 0.5mm pitch ...
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1answer
43 views

Zigbit ATZB-24-A2 SMD to DIP socket

I'm looking for solution how to mount Zigbit ATZB to prototype board without making individual PCB with pin outputs. Do you know any socket adapter with pins spacing like this? Or any other solution ...