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Questions tagged [configuration]

The tag has no usage guidance.

17
votes
6answers
5k views

Choosing Configuration Jumpers - Solder bridges, 0-ohm resistors, DIP switches, pin jumpers

I'm working on a development board, and need to let users set some configurations. It will be used by students and engineers who are trying to build circuits on a breadboard; I'm not dealing with ...
10
votes
11answers
5k views

Alternatives to a classic DIP switch

I'm looking for a part that enables a user to frequently change a configuration. Right now I'm utilizing a SMD DIP switch connected to an I2C I/O expander. What bothers me is the large footprint of ...
10
votes
2answers
8k views

MSP430 Code Size in CCS

This should be pretty straight forward, but my google-ing is not turning anything up... I can build my project successfully in TI Code Composer Studio (CCSv5) and target my device. Now I want to ...
8
votes
3answers
1k views

What does #if 0 do

Today I started to use MPLAB X to program my PICs, and found a code template, with multiple files and spots to fill in code. Before I have had a single file with my code in it. In this template, where ...
7
votes
3answers
1k views

What actually happens when we set direction on GPIOs in controllers ?

Generally, while working on GPIO pins of any controller/device, we set the directions for the GPIO pins. Let's say in LPC2148(ARM7 core) controller, we have IODIR to configure the direction of Pin. We ...
6
votes
2answers
5k views

What Are Lock Bits?

What are lock bits in microcontrollers used for? Are they something specific to AVRs, or used more of a general concept in microcontrollers?
6
votes
1answer
8k views

What does “configuration” refer to in PCI and PCIe? How is this different from “Enumeration”

I am not being able to find a clear description of what configuration means in PCI and PCIe. I have found something called as configuration space, but without knowing what configuration means, it is ...
5
votes
3answers
145 views

Why are T-Filters better than L-Filters?

I was watching a beginners video about electronic filters. In that video, the presenter shows the same filter (same inductance and capacitance values) configured as an "L-Filter" and a "T-Filter" as ...
4
votes
2answers
3k views

I need help getting my computer to talk to my Arduino Uno [closed]

I've recently jumped on the Arduino bandwagon and am attempting to upload my very first sketch to my Arduino Uno installed on COM port 3. However, I get errors that another device is using COM port 3 ...
4
votes
1answer
3k views

Error when using debugging under Atollic TrueStudio / STM32

I'm using STM32F103C8T6 Atollic TrueStudio STLink2.1 Error I get when debugging: Debug configuration set in TrueStudio: What worked before was in SW4STM32/Eclipse, with the following settings. I ...
4
votes
1answer
797 views

Is it possible for an FPGA to “partially” configure?

I have a spartan 6 board that I designed and am having some configuration issues. I'm using SPI flash to program the fpga (e.g. I use jtag to write the flash and the flash then writes the fpga). The ...
3
votes
2answers
870 views

Can not keep pin LOW during FPGA configuration

I would like to have a control signal that stays low all the time and goes hi only when I tell it to. Initializing the pin in the entity does not seem to set the value to zero (xc6slx25-3ftg256): <...
3
votes
2answers
1k views

4 Digit LED Display usage

I have a 4 digit LED display that I would like to integrate into my project, but only has 12 total pins when there are 4 digits. I am a beginner so I do not know how or which pins to power in order to ...
3
votes
1answer
798 views

XBee-PRO broadcast configuration

How can I configure an XBee-PRO module in broadcast mode? We are using an AT8051 controller.
3
votes
1answer
603 views

FPGA Configuration Flash as General Purpose Memory After Boot

I am currently working on a system with a Spartan-6 FPGA and have a need for some low volumes of non-volatile memory to be used during system operation. My question is, since I have a relatively ...
3
votes
1answer
541 views

Is there any way to programmatically reset the BWP bit on a PIC32

We have a product using the PIC32MX795F512L out in the field that has firmware in both the boot and program sections. The boot flash is write protected using the BWP bit 24 = 0 in DEVCFG0. The ...
3
votes
3answers
2k views

AtTiny85 analog / digital pin configuration order in setup

Bug in compiler or what ever? Simplified circuitry there is 2 LEDs and 1 analog input. LED connected to pin PB1 lights very dim when output is high. It seems that output has been configured to high ...
3
votes
2answers
1k views

Rewriting PIC configuration bytes at runtime

My device is the dsPIC33EP64MC202. I have a bootloader which loads a program in flash to run or erases and rewrites that program as directed by serial commands. If possible, I would like to account ...
2
votes
2answers
4k views

PIC32 System clock <-> Peripheral clock

In a demo software from Olimex for the PIC32-MAXI-WEB the configuration words for the osc are set as follows: ...
2
votes
3answers
2k views

Need help with hardware and software config on PIC12F675 to light up an LED

I'm trying to get an output from a PIC12F675, but I can't seem to get it to work. Here is my hardware setup that I breadboarded: And here is my code programmed using a PicKit2: ...
2
votes
1answer
3k views

Why the emitter is earthed in the Common-Emitter configuration of a Transistor?

While reading the Common-Emitter configuration of a Transistor from a book, they said that the Emitter is earthed...? Then I Googled it and found the same thing... So my question is that why it is ...
2
votes
1answer
3k views

How do I reset an FPGA development board to its factory settings?

I have programmed an Altera board in configuration mode so that it runs my program when booted up. Now I want to revert it back to factory configuration. How do I do that?
2
votes
1answer
807 views

Optimal configuration for PLL on LPC17xx

I'm trying to write an algorithm that would pick the best available PLL0 configuration for the user based on F_in and F_cclk. The manual says that I should pick higher F_ref if possible for a more ...
2
votes
1answer
79 views

Begin programming using audio signals

I recently purchased a Amcrest ProHD IP2M-841W 1080P camera where the initial configuration is done over some kind of audio signal, a companion app for mobile phones which, at the end of the ...
2
votes
1answer
268 views

Wrong pin configuration of LM317 and LM337

I have a problem with the circuit i was given it seems that i made my circuit connection wrong. the pinconguration of LM317 and LM337 are on the left picture with 1-2-3 while i am suppose to connect ...
2
votes
1answer
190 views

Why would an audio circuit output through two caps like this?

I'm studying a circuit that is based on a clone of the Apple Mockingboard from way back when. Being new to EE, the first thing that struck me as odd is why the ...
2
votes
2answers
6k views

VHDL configuration: Selecting architecture

I'm learning the use of configuration statement. For this I've created a top level entity not_gate and an architecture structural. I've also added another vhd file to this program, and that vhd file (...
2
votes
1answer
3k views

XBee wireless module not responding any more

I bought an XBee-PRO S1 .. I built its serial explorer to be able to configure it through the PC, I’m using X-CTU to configure and test it at first it worked well,I made test/query successfully ...
2
votes
1answer
12k views

How to change Bluetooth music receiver's name and other settings using a serial converter (or otherwise) [closed]

I'm rather new to electronics but I have a fundamental grasp of the general concepts. I'm not very fluent, however, on the workings of specific devices as of yet (internally, I mean; inside their ...
2
votes
0answers
107 views

How is CC3000 placed in Simple Configuration mode?

I've ordered a CC3000MODR and soldered it to a simple breakout board. In the First Time Configuration it mentions a Simple Configuration mode: The CC3000 is placed in Simple Configuration mode and ...
1
vote
1answer
115 views

Where are details regarding peripheral configuration for STM32 controllers in datasheets?

I have recently begun working more with STM32 processors coming from the more simple Atmel 8bit variety. The Atmel datasheets are very nicely laid out -- specifically speaking to how they provide ...
1
vote
2answers
225 views

Altera has created EPCS and EPCQ devices, can only these be used to store FPGA configuration data?

FPGA configuration data must be stored in external non-volatile memory. Can we use just any flash memory or only specific types? What about EEPROMs or any other nonvolatile memory device? Edit: I am ...
1
vote
1answer
563 views

Different pin assignment for same regulator

I got 2 samples of LP2905CZ (TO-92) voltage regulator. First sample is made by TI and second on by On Semiconductor. Links of the datasheets: On Semiconductor TI Due to ignorance, I just read the ...
1
vote
1answer
199 views

All possible BJT circuits relating to polarity

The BJT can operate in 4 different modes/zones since there are two voltages on it: Active mode Inverse/Reverse active mode Saturation mode Cut-off mode Because Emitter and Collector junctions can ...
1
vote
2answers
117 views

Is there a standard way to build a configurable circuit topology mesh using mechanical or solid state relays (or/and other components)?

Preamble: The motivation is to build a hybrid analog/digital computer this is reconfigurable (the topology of the opapms, resistors, capacitors, adders are all wired automatically -- without human ...
1
vote
2answers
1k views

System Generator: How to configure the pins for the signals of your design?

I am programming a FPGA by System Generator. I have done this design: I don´t know what are the respectives pins of my FPGA for the blocks of my design called 'Gateway In' and 'Gateway Out'. I would ...
1
vote
1answer
405 views

Configure Serial with registers on STM32l073RZ

I'm trying to configure the Serial of my STM32L073RZ with registers to send datas on the PA_9 pin. Currently I have this script ...
1
vote
2answers
146 views

LMR16030 voltage regulator circuit

I am trying to set up a circuit to use the LMR16030 buck regulator to step down 60V to 9V. I bought the Powergood version and I'm not sure how to connect the power good pin. As you can see in the ...
1
vote
1answer
165 views

What is the effect of remapping ports on a USB hub

I'm using the USB2517 for a project. It's a seven port hub, and I'm using six of them. I'm working through the config settings, and I'm stumped by the port remap registers. The datasheet gives the ...
1
vote
1answer
858 views

Combine a vhdl and verilog configuration file

I'm trying to create a simple proof of concept regarding the configuration of our testbench (binding the correct entities to components/modules). The structure is as follows: top(VHDL entity) --...
1
vote
1answer
3k views

Xilinx Programming FPGA from SPI Flash without JTAG

I'm trying to be able to configure my FPGA by loading the configuration into the flash memory. I am able to write to the SPI flash through an ethernet interface, so I think it would be possible to ...
1
vote
1answer
304 views

Altera FPGA Configuration using Flash

During my current PCB design using Altera FPGA, I happened to come across knowledge that Altera EPCS devices are to be used for FPGA configuration. After further research, I realized the same job can ...
1
vote
1answer
176 views

Is it possible to get an exponential capacitance curve from coded dip switch

I have a capacitor that controls frequency for a specialty IC with the relationship \$F \propto 1/C\$ I want to be able to get a number of frequencies in evenly spaced intervals. Currently I have a ...
1
vote
1answer
300 views

FPGA; reconfigure from SPI flash

I have designed a Xilinx Spartan-6 PCI card with SPI configuration interface (please check Figure 2-12 of ug380.pdf user guide). I can program the serial flash through JTAG cable, I can also modify/...
1
vote
1answer
2k views

Class J RF Power Amplifier

What is a Class-J Amplifier configuration? Does it work in a push-pull configuration similar to an A/B? How is it physically different to an A/B? Where can I see a basic schematic? I have read ...
1
vote
1answer
2k views

What are input/output buffers for pads?

As an embedded software engineer I am familiar with "application-level" (if I may call them) pads configuration, such as; function (GPIO, i2c, etc), direction (input or output), active high or low, ...
1
vote
2answers
1k views

Two amplifiers in single speaker with different frequency power

I have two amplifiers using LM386. One of them I plan to use for normal amplifier and the second one I want it to be a low pass amplifier/bass amplifier and both of them will be connected to same ...
1
vote
1answer
4k views

Configuration Settings of 18F4550

I have the following config values for 18F452 on my code; ...
1
vote
0answers
38 views

Schematic configurations in SolidWorks Electrical

SolidWorks can use design tables to generate multiple versions of the same schematic. This allows you to draw the most complicated version you can think of and use it to generate many other versions ...
1
vote
2answers
76 views

Separate calibration values from program

I am working on a device with an internal pump. Due to small differences in the pump's motor speed, I have to calibrate the pump. The result is a value between 0 and 1 (PWM duty cycle). The PWM is ...