Questions tagged [code]
The code tag has no usage guidance.
82
questions
0
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0answers
31 views
How can i get a new string from other strings without simply concatenating them, in C programming? [migrated]
I need some help in C programming, please.
I want to generate a new string from other strings without using concatenation functions or crypto algorithms (md5, rsa, aes, sha256). Specifically, i want ...
0
votes
0answers
23 views
How should I model differential non linearity (DNL) of a DAC?
I have very little experience with electronic instrumentation, and I'm learning about INL/DNL.
I'm looking at the specifications for a DAC, and the sheet claims a guaranteed DNL of -1 to 1 LSB. ...
1
vote
1answer
40 views
First bit of NRZI
I was searching for Non-Return-to-Zero Inverted, but no references I couldn't find any reference about the first bit in NRZI.
I know that, in NRZI, 1 refers to <...
0
votes
1answer
53 views
CDMA basic working principle
I find it hard to find on the internet a simplified explanation of the principle of operation of the CDMA system. Could you give me an example of how it works and how a receiver can correctly identify ...
1
vote
1answer
190 views
Programming of ADC in PIC12F675: Not Working Properly
I'm new to embedded systems and I want to program a PIC12F675 for a project.
So, the idea is that there is a switch. If the switch is off, the microcontroller normally outputs a clock signal, which ...
0
votes
0answers
58 views
Coding for conductivity measurement using Arduino and 16 bit ADC
I am using a 16 bit ADC (Adafruit) connected to Arduino UNO through I2C. When I use differential mode to measure water conductivity (I plug jumper wires into pins A0 and A1 on the ADC), my numbers are ...
0
votes
1answer
102 views
Where to begin with programming an audio interface driver?
I'm designing my own mic/line preamp (the analog portions) and would like to have it interface with a computer in a send-return fashion as well (like any typical audio interface).
I've noticed that ...
0
votes
2answers
69 views
Setting pins as output Code - micro-controller
So i am using the MSP432 and i am confused on how the code for setting pin to desired function works.
so for example from the manual i have found that:
...
0
votes
2answers
203 views
8051 microcontroller problem to find execution time of part1 for a given code
For the below mentioned 8051 assembly code:
Time elapse: MOV R0,#100
Part 1 \$ \quad \, \, \,\,\$ : MOV R1,#50
Part 2 \$ \quad \, \, \,\,\$ : MOV R2,#248
Part 3 \$ \quad \, \, \,\,...
0
votes
1answer
85 views
Wiring colour code/law on universal power supply
Is it legal to use brown and blue for live and neutral wires in equipment sold in the USA, which uses 110v?
I was looking at a teardown of an ATX power supply and one of the photos (see below) showed ...
0
votes
1answer
51 views
Completing Gray Code Given Initial Part
I've been asked to complete the following 5 bit Gray code:
I know how to generate a Gray code (create a mirror image, pad the original values with a 0 and the reflected part with a 1), but I'm not ...
0
votes
1answer
56 views
Built-in Timer Module HCS12
Why is it preferable to use the built-in timer module rather than using assembly language coding to create delay loops?
I've gone through the entire "HCS12 Microcontroller and Embedded Systems" book,...
0
votes
1answer
44 views
Getting out of a pattern in Arduino IDE - Ultrasonic + Motors Using Arduino
I am doing my final-year project of an autonomous river cleaning robot. I seem to have a problem with my code.. For now, i want to read my Ultrasonic Sensors (HCSR-04) while getting my DC motors to ...
6
votes
1answer
2k views
Identify unknown SMD component code A6530 72130
I have a TTL to RS485 driver board and I am try identify one of the manufacturer part number from the board.
Can anyone identify the SMD Code and manufacturer part number of the following device?
...
0
votes
1answer
87 views
Problem in blocking and non-blocking - verilog
I have this code and I am having a problem in the product output, any ideas? I've tried a lot and it doesn't work.
-1
votes
2answers
245 views
issue with booth multiplier VHDL code
I'm trying to build a 4-bit booth multiplier using VHDL. I don't know why but the process block is executed just once. The state does change from idle to busy then it doesn't work.
...
0
votes
2answers
201 views
How does programming code provide power to electronic circuits? [closed]
I've been thinking about a question and haven't been able to find an answer. The question is that:
For instance, an Arduino has a 5V output pin to feed any electronic component. When you code ...
-1
votes
1answer
862 views
SMD diode part number from marking code [duplicate]
I can't find SMD diode part no from Marking code,pls suggest if possible.
-1
votes
1answer
209 views
SRF05 | PIC16F18875
I´m doing a project for my electronics class. I´m trying to calculate a distance using a SRF- 05 Ultrasonic Sensor; but the result in the display is 0 .
I´m using a Curiosity HPC Development Board w/ ...
0
votes
1answer
99 views
Debugging initialization of LCD with S6D05A1 driver
I'm trying to get this 320 x 480 LCD going through SPI (4 wire 8bit) for a while now but no luck. It seems like the resolution is not defined as should during init but I can't see how.
Here what I ...
0
votes
1answer
930 views
BMP280 sensor (i2c) and c library
I'm writing software (for ATMega32) that reads pressure from Bosch BMP280 sensor. I'm using I2C bus. I have found this library: https://github.com/BoschSensortec/BMP280_driver
and I have a question ...
0
votes
3answers
305 views
Bitwise operators: Whats the difference ^= vs &= ~(smthg)?
I'm coding for microcontrollers and I've come across two styles of bitwise operations that quite confuse me a lot because they are used interchangeably.
First let's assume our REGISTER has 4 bits; bit ...
0
votes
1answer
44 views
How to receive audio from Arduino into Max [closed]
I'm a beginner with Max and what I'm trying to do is take the the audio input signal going into my Arduino and hear the receiving audio playing through Max. There's a photo below of the patch that I'm ...
1
vote
1answer
147 views
4bit demultiplexer with address entries in the EXCESS-3 code
My question is: how to make truth table for inputs on E3? There is only space for 2 bits, and E3 is written on 4 bits as I saw. Should I add more inputs for this situation or do this in different way?
0
votes
1answer
294 views
I'm writing a simple verilog code, having little trouble
In the image shown below, there says a syntax error at line 10. Its a basic If statement, i dont know why the syntax error shows up. Please advise
2
votes
1answer
802 views
Generate hamming code-words with given minimum distance
My understanding of hamming code (adding this as it might help someone in future):
Description: Hamming code is basically an extended parity check code. Message is divided into blocks, and multiple ...
0
votes
1answer
41 views
Is a cross-correlation property of Gold code independent to modulation?
Gold code is known to have a good cross-corrleation property, i.e., a high cross-correlation value shows iff two sequences are the same.
I wonder whether it is independent to modulation, e.g., BPSK, ...
3
votes
1answer
154 views
Errors in microcontroller delay routine
I have an issue with a delay routine that I am writing for use on a PIC32, the PIC32MX664F128H in particular.
I have two separate delay functions, which use the same lower-level delay routine: one ...
3
votes
4answers
2k views
How is the code written in ARM7 compatible with ARM9?
I'm studying ARM families,
In the above image, it is written that the code by supported ARM7 can be migrated to ARM9 and others.
ARM7 uses the Von-Neumann architecture (single bus for data and ...
8
votes
3answers
4k views
Why is the Gray code called a cyclic code?
I understand why it is called reflexive and a unit distance code. I don't see any cyclic pattern which is repeating in the code. Why is it called a cyclic code?
-2
votes
1answer
551 views
Please Help me with this PSpice CODE CIRCUIT [closed]
I have a circuit to implement in PSpice, but I am completely newbie. Can you help me with it ? Here is the picture of it. I have to make an AC analysis, with a a signal source of 100mV with the ...
0
votes
1answer
740 views
Custom code on a calculator
I have got this old Casio fx-92B calculator I am not using any more. I opened it up and found this:
I am not an electrical engineer. Is there a possibility of tweaking this board to make it run ...
1
vote
1answer
356 views
12V Stepper Motor not working - vibrates but doesnt spin
I'm working on a project and unfortunately my DC motor is not working. I wired it like this, am using a brand-new motor (SP BN2A in this document, I scavenged it from a bidet I had at home), powering ...
1
vote
1answer
349 views
VHDL Style Checker / Check Style
Is there a style checker for VHDL?
I found style guidelines, but I didn't find anything like check style.
Thanks in advance!
1
vote
1answer
74 views
Code protection in External flash
I am implementing external code execution for STM32F765VG with NOR flash (8/16 bit). The idea is to execute code from external flash memory. are there any ways to protect my code present in external ...
0
votes
1answer
205 views
Calculating receiver signal in CDMA
I am struggling to understand how the receiver is able to differentiate between multiple CDMA users, who are transmitting at the same time.
In this figure for example, I understand each part, except ...
0
votes
2answers
2k views
Tantalum Cap Code Explained
I need to replace the following cap:
It was placed at the input of a device that runs off 24Vdc, like the following schematic.
simulate this circuit – Schematic created using CircuitLab
I'm ...
0
votes
1answer
152 views
Gray Code Conversion
I'm aware that in Gray code the successive numbers will differ only by one bit. However I'm not able to proceed further.
21
votes
3answers
5k views
What is a Patty Code?
In my digital logic lecture today, my professor introduced a symbol code called Patty Code. I copied this table off the whiteboard:
| Symbol | Binary | Odd Patty | Even Patty |
|--------+---...
0
votes
1answer
126 views
What does it mean code for TFT LCD rgb?
What does it mean code for TFT LCD rgb?
i dont know ("%s") or ("\x12" "kwh") or "%4u:%02U:%02u" ?
0
votes
4answers
1k views
Code Optimization of IF Statements?
Considering the design limitation of hardware (clock speed, memory, etc…), is there any better way to write IF statements more efficiently in C language (e.g. run on Arduino), more specifically the ...
0
votes
1answer
574 views
How do I generate the described pulse signal in Matlab (Simulink)?
I want to implement the following signal:
I(t) = 500*(sin(pi.t/0.3))^2, t belongs {0,Ts}
= 0, t belongs {Ts,T}
Here, T = 0.8 and Ts = 0.3
The code I tried:
...
0
votes
2answers
1k views
Extra I2C on stm32f
I am using stm32f105 to control 5 I2C buses and some other peripheral circuits. The problem is that I used all dedicated I2C pins by other peripheral circuits. Is it possible I change a GPIO (General ...
0
votes
1answer
47 views
AYTINYx4 - execute other code during analog conversion
I am using an ATTINY44 in my current project.
As I need to do some time sensitive switching I would like to avoid any unnecessary delay.
To control another device (not time sensitive) I need to read ...
1
vote
3answers
539 views
Arduino code - Why do we need to read the rising edge?
I'm having a difficult time figuring out why we need to read the rising edge instead of using both edges.
We are doing a school lab using interrupts in Arduino code, and I understand that we need ...
5
votes
1answer
381 views
What component has the reference designator RY?
I found a component designated RY8015 which I don't recognize, shown on the photo below on an LCD TV PCB (the bulb-like part next to a green radial varistor).
What is it called? What is its design ...
0
votes
1answer
551 views
Do I need to use the 'add' function in mips to store into a variable or can I store into a variable with load word?
The following problems deal with translating from C to MIPS. Assume that the variables f,g,h,i, and j are assigned to registers $s0, $s1, $s2, $s3, and $s4, respectively. Assume that the base address ...
0
votes
2answers
191 views
Verilog code question
I'm new in Verilog and I need to create a module that when Entry=1, it will increment 5'b000100 in the "Money" output.
This is the code that I made, but it's not working properly. The program it's ...
1
vote
2answers
402 views
Understand VHDL Code
I've been learning VHDL coding for the past two weeks to be able to understand the VHDL code of what I'll be working on. In other words, I'm still a beginner and I need help understanding some codes ...
0
votes
1answer
939 views
RTOS: Micrium uCOS vs Mentor Graphics Nucleus
We're working on a wearable IoT device, and I'm hoping for some guidance on the common commercially available RTOS, such as what's the difference between the two. As of current I'm leaning toward ...
