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Help me understand this circuit (3v3 to 5v UART)
I'm working with an evaluation board to try to verify something for a PCB that was designed with the evaluation board as the template. I am unable to use UART to talk to the...
Wednesday, 4 May 2022 - 10:01
Embedded Linux (i.MX6)- accessing SPI GPIOs individually
I'm not sure anyone will be able to help me but I am gonna throw out this Hail Mary-pass as I am getting brick-walled on the NXP forums. This is a bit long so bear with me....
Friday, 29 April 2022 - 17:45
ATUC256L4U: TWIM reading peripheral register values - clock stuck on LOW
Hi,   I'm successfully writing values to register (according to my oscilloscope and how the peripheral is reacting). However, I'm having less luck in reading registers....
Monday, 4 April 2022 - 14:01
ATUC256L4U: PDCA to TWIM
I'm trying to send some commands to an I2C device but I am running up against a wall. The device is responding to my commands and adjusting its voltage as I am writing to the...
Friday, 1 April 2022 - 17:01
Accidentally plugged ATMEL-ICE to wrong port (AVR to SAM), is it bricked?
I have a board with both an ATUC256L4U and a ATSAML21E18B. I was doing some work on both of them and managed to forget to switch the connection on the ICE over to the AVR...
Tuesday, 29 March 2022 - 13:49
ATUC256L4U: PDCA to I2C
Hello,   I am trying to wrap my head around some legacy code and modify a function. The previous piece of code (see below) controlled a simple write-only I2C device where you...
Monday, 21 February 2022 - 17:00
ATUC256L4U: GPIO erroneously detecting
Hello.   I have a 1k resistor wired directly between PA18 and Ground on some newer PCBs. I am using it as hardware detection of the PCB version in the following way...
Friday, 3 December 2021 - 14:16
Problem ssh:ing into a Linux machine
Hello,   I have a device running a Linux system that I am having issues SSHing into. It keeps refusing all of my attempts. I can connect to the device through a serial cable...
Tuesday, 23 November 2021 - 11:00
What does capacitance/voltage mean on this circuit?
Hi there,   I'm designing a circuit to test a device and I ran into something that I haven't seen before - some of the capacitance values are divided by a voltage as shown...
Thursday, 21 October 2021 - 09:56
Bootloader issues with ATUC256L4U
Hello,   I'm attempting to upload a program for the MCU and a bootloader to my ATUC256L4U in a production environment. In production they are using a windows .cmd file...
Tuesday, 5 October 2021 - 13:30
How to compile a hex-file for User Page data (ATUC256L4U)
Hi,   I'm storing some data in the user page section of the memory that is programmed at production. This data never changes once the unit leaves production, however,...
Tuesday, 28 September 2021 - 12:34
Issues with editing buffer to be sent over SPI/DMA SAML21 (coding mistake?)
I managed to get DMA working together with SPI by using the ASF quick start guide:   https://asf.microchip.com/docs/l...   I am able to initialize the buffer that is to...
Friday, 6 August 2021 - 14:59

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