The configuration tag has no usage guidance.
7
votes
3answers
747 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 ...
0
votes
0answers
27 views
DSPIC30F4011 - Need Help with Sequential 4 channel ADC Scanning
I am working on a project with some friends which calls for several IR proximity sensors to be sampled sequentially (The emitters must be powered up individually)
but I am really struggling with the ...
1
vote
1answer
60 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
1answer
76 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
62 views
FPGA + SRAM - floating inputs of SRAM during configuration of FPGA
I'm connecting SRAM to FPGA (Spartan 6). During configuration and during periods when FPGA will be down (for example I would like to turn off FPGA when external flash will be programmed by uC) address ...
3
votes
2answers
78 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):
...
5
votes
3answers
112 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 ...
0
votes
1answer
709 views
How to change Bluetooth music receiver's name and other settings using a serial converter (or otherwise)
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 ...
1
vote
1answer
78 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 ...
0
votes
1answer
1k 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 ...
1
vote
1answer
213 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
121 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 ...
0
votes
1answer
169 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, ...
2
votes
1answer
141 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 ...
-1
votes
3answers
257 views
Question about common emitter configuration?
The configuration of the common emitter amplifier is one resistor at the emitter, on resistor at the collector, two bias resistors at the base as shown in this picture :
I saw this new ...
3
votes
1answer
332 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 ...
0
votes
1answer
49 views
Configuration an FPGA on installation
I am working on a project using a Virtex-5 FPGA. The small projects that I've worked on with FPGAs has only required me to program the FPGAs on development boards using JTAG or loading the bit file ...
0
votes
1answer
130 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 ...
2
votes
1answer
1k 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?
1
vote
1answer
408 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 ...
3
votes
2answers
351 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
0answers
98 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 ...
2
votes
2answers
2k 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
527 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 ...
4
votes
1answer
342 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 ...
2
votes
2answers
2k 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:
...
-4
votes
2answers
126 views
Transistor configurations [closed]
I often come across circuits saying that the transistors therein are in common collector (or common emitter or common base) configuration. What is all these configurations about and what is their ...
5
votes
1answer
5k 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 ...
0
votes
2answers
296 views
Voltage holder circuit configuration circuit
hi I didn't studies all the circuit configurations and also I'm a newbie to EE.
My question is I need to design something like a voltage holder.
The idea is two emitter followers.
One is NPN one ...
5
votes
2answers
3k views
I need help getting my computer to talk to my Arduino Uno
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, ...
-1
votes
2answers
59 views
Where are factory default setting stored in a wireless module?
In almost all devices we find "Restore To default factory settings" option available. If factory settings are done all the data in the device is erased. So where are these factory setting details ...
3
votes
2answers
970 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 ...
0
votes
2answers
3k views
How to make MCLRE in CONFIG3 word work in PIC18F using MPLABX XC8
I am trying to start with PIC18 microcontrollers with a PIC18F14K50.
I am using XC8 compiler and MPLABX IDE v1.2 and I have re-checked the selected device in the project configuration.
For now, I am ...
1
vote
1answer
4k views
8
votes
3answers
902 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 ...
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 ...
9
votes
2answers
6k 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 ...
2
votes
3answers
1k 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:
...
5
votes
2answers
3k 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?
1
vote
2answers
747 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 ...
14
votes
6answers
3k 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 ...
3
votes
1answer
692 views
XBee-PRO broadcast configuration
How can I configure an XBee-PRO module in broadcast mode?
We are using an AT8051 controller.
