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Cannot properly switch SPI MODE on ATSAME70Q21
I'm using SPI and the ASF library on a custom ATSAME70Q21 board.  The following code shows how the SPI is being setup and programmed.  The DAC device (DAC8851) is being...
Wednesday, 14 June 2017 - 19:33
Memory mapping to USB Mass Storage Device (device)
I have a custom PCB with the ATSAME70Q21A microcontroller. After reading the quick start guide to the USB Mass Storage module, I am uncertain with respect to how the Mass Storage...
Thursday, 24 November 2016 - 21:52
Modifying SDR SDRAM core to use 512 Mbit memory
ISSUE: There is source code for SDR SDRAM cores posted on the Internet; it is possible to download this Verilog/VHDL code, synthesize it, and use it in an FPGA. I've looked at...
Sunday, 20 November 2011 - 22:09
Repair of BGA - solder balls melted down via holes
I've created a new prototype circuit board with 217-LFBGA (AT91SAM processor) and 54-VFBGA parts (SDRAM memory). Unfortunately, I've found that some of the through-hole vias were...
Tuesday, 22 March 2011 - 03:33
Setting up timer for ADC conversion trigger
I've been working with the ATMEGA324P-20AU to read some data over SPI from five ADCs that are triggered (all at the same time) by a conversion pin. The conversion pin of each ADC...
Tuesday, 18 January 2011 - 17:51
Implementing ADC data capture system and DAC control loop
I'm in the process of designing a data capture and feedback loop control system. The system is comprised of five AD7685 ADCs (http://www.analog.com/static/imp...) that will be...
Friday, 14 January 2011 - 04:45
Using AD7691 ADC to measure voltage drop across resistor
Hello, From what I've read in the datasheet, the AD7691 ADC (http://www.analog.com/static/imp...) can digitize a voltage ranging between +/-VREF. A single-ended to differential...
Wednesday, 3 November 2010 - 01:08
Running user programs on startup
Hello-- Before deploying one of my new AVR32 AP7001 systems, I added a script to the /etc/init.d directory to run another script situated in a root directory /programs. Here is...
Wednesday, 20 January 2010 - 17:33
Best way to update multiple bits in a PORTx register
Hello-- I've recently designed a circuit board with an ATMEGA. The ATMEGA provides a calibration front-end for a research sensing system. Some of the port pins of this...
Wednesday, 13 January 2010 - 05:32
Decoding voltage from two's complement ADC output
Hello-- I've recently designed, built, and tested an AVR32 embedded system for conducting research. The system has a FPGA and runs Linux. I am harvesting data from six Analog-to-...
Sunday, 10 January 2010 - 04:18
Connecting male pin headers together
I own the NGW100 AVR32 evaluation kit from Atmel: https://www.avrfreaks.net/wiki/in... I've soldered male pin headers to the appropriate holes on this evaluation kit. I would like...
Wednesday, 30 September 2009 - 05:55
Interfacing AVR USART to AVR32 USART
Is it possible to interface an AVR USART directly to the AVR32 USART port? I have a design where I would like to have an 8-bit AVR talk with the AVR32 over USART. Would I simply...
Wednesday, 30 September 2009 - 05:48

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