Questions tagged [configuration]

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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
6k 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
147 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
827 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
485 views

Kelvin type connection

I'm studying semiconductor parameter analyzers. Those instruments are based on SMU (source and measuring unit) which can work either in the V-mode (they force a voltage on the device under test and ...
3
votes
2answers
959 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
802 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
657 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
553 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
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
839 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
86 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
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 ...
2
votes
1answer
281 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
193 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
119 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
357 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
612 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
212 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
122 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
429 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
152 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
192 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
958 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
4k 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
340 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
191 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
332 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
2answers
7k views

Hall Sensor NJK-5002-C Configuraion

Here is the link to the sensor I am talking about. Now the problem is that according to the label it has as shown, it says that Brown wire goes to V+, Blue wire to V- and the Black wire goes to Signal....
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; ...