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Questions tagged [avr32]

For questions specific to the Atmel AVR32 series of 32-bit microcontrollers.

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2
votes
1answer
309 views

SAMD21 DAC example

beginner here in need for starting directions. I have SAMD21 Xplained Pro Board. I would like to produce DC DAC output, based on 8 bits on the input. Range of my DC output values should be around ...
0
votes
1answer
51 views

Options for debugging MCU that is freezing/crashing (AVR32)

Im currently trying to figure out why it seems like a MCU is crashing/freezing. I can recreate the crash/freezing almost everytime by doing the same procedure, and i have been looking through the code ...
0
votes
1answer
45 views

Can't program atmega32 interfaced with LM34

i want to read all temperature range of the LM34(-50 to +300) but i only can program single ended like this one, and i only can read from 0 to 50 F but i can't program one like this(can't read two ...
0
votes
1answer
437 views

How to read LM34 temperature sensor negative voltage with atmega32?

I'm trying to read the temperature witr LM34 but it only reads from 0 to 50 F and ut's rage knows as from -50 to +300 F, so i asked a lot and i found that my circuit below can't read a negative ...
0
votes
1answer
285 views

How to configure an AVR32 as a USB CDC Device?

I am trying to configure an AVR32(UC3B0512) microcontroller so that it can appear as a Virtual COM Port to the PC. I followed the instructions in this application note, but could not get it working. I ...
-3
votes
2answers
193 views

i'm using atmega32 to do an automatic railway gate project i wrote the code ,but i have a problem with it that it doesn't give me the required output? [closed]

I've a school project "automatic railway system ", i wrote the code but it works only on protues . when i burn it on the kit it doesn't work . what is the wrong with this code ?? "my project idea ...
0
votes
1answer
50 views

Atmel UC3A0512 microcontroller documentation

I started using this microcontroller but I am dealing with the lack of documentation. First of all this is the datasheet. It describes registers and their usage but not a workflow. Which one to set ...
3
votes
1answer
747 views

Correct SPI Configuration?

I'm still not entirely clear on TTL, so please, forgive my ignorance in this. I have a sensor and a microcontroller. The sensor is a BMI055 Gyroscope and accelerometer. The microcontroller is the ...
1
vote
2answers
104 views

Using internal pull-ups for TWI on AT32UC3B?

Does anyone know if it's possible to use the built-in pull-ups for TWI on the at32uc3b chips? I've been adding external pull-ups to my TWI circuits in the past because I couldn't find any concrete ...
1
vote
3answers
4k views

What do I need to start with AVR UC3 Microcontrollers?

I am just beginning to learn how to use microcontrollers, and I have decided I am going to learn on the UC3B 32-bit avr. I will also be learning C programming in the process. What do I need in terms ...
2
votes
2answers
839 views

How can I receive multiple bytes on SPI with CS being held low?

I have an FPGA which sends out a stream of bits over SPI communicating to 3 AD8403 daisy chained together. The FPGA keeps CS low, until 30 bits (2 address bits, 8 data bits x 3) have been transmitted,...
12
votes
2answers
974 views

Unable to get bootloader working on custom PCB with AT32UC3L

I have designed a PCB for a client recently, everything is fine with the hardware and software (application is working as it is supposed to). Now we are facing the need to update the program inside ...
5
votes
2answers
827 views

Can a wrong crystal oscilator capacitor burn the MCU?

Short story: I am using an Atmel AT32UC3C2512C MCU and I selected a 20MHz crystal oscillator for it and two NP0 10pF capacitors. I was in doubt between 10pF, 15pF or 22pF, so I decided to start with ...
1
vote
1answer
232 views

AVR32 Drive Strength

The UC3C Datasheet doesn't provide a clear explanation about "drive strength", how it behaves and the side effects in projects. After fabricating my board I realized I placed a LED on a x1 strength ...
2
votes
1answer
120 views

AVR32 Internal regulator

I am not pretending to use this, but as a general curiosity, when the AT32UC3C2512C datasheet says in page 1259, Table 40-20, parameter Iout, that the internal 3.3V regulator has a 35mA DC output ...