Questions tagged [c]
C is an imperative (procedural) systems implementation language. It was designed to be compiled using a relatively straightforward compiler, to provide low-level access to memory, to provide language constructs that map efficiently to machine instructions, and to require minimal run-time support. C was therefore useful for many applications that had formerly been coded in assembly language. From https://en.wikipedia.org/wiki/C_(programming_language).
1,676 questions
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Only blocks appear on the 16x2 LCD connected to the STM32 Blue Pill (STM32F103C8T6) via I2C
As demonstrated by the image above, blocks are displayed on the LCD1, even though I've configured and programmed the Blue Pill STM32F103C8T6 board and connected it ...
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Does the RDBF flag gets set automatically after transmitting a byte?
I’m working with at32f403a.
I’m trying to understand the flow of SPI communication. I’m using polling not interrupts in my implementation of an SPI_TransmitReceive ...
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Best way to convert CAN DBC File to C Code for Decoding CAN Messages?
I am working on embedded software development for an electric vehicle. Here, i have the dbc file for full vehicle-can network now the problem is i need to write code for encoding and decoding the ...
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Accessing a C variable to use it as a literal in assembly code
Within an XC16 assembly code portion, I want to use a C variable as a literal. Here's a portion of my code :
C function :
int x=4;
int *TrisCSX = (int*) 0x2C8;
x ...
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Compile time error with inline PIC assembly in MPLAB XC16 C
In a PIC24FV32KA302 C code, I want to add inline assembly. For this, I use, for instance, __asm("BSET PORTB,8");.
When compiling, I get the following ...
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Why does simple embedded scheduler timing drift when last_run is updated after task execution?
I'm working with a simple non-preemptive task scheduler on a microcontroller The goal is to run several tasks periodically based on their defined rates.
I'm currently studying embedded systems and ...
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Unable to get LIS3DH to work
I am using a MSP430FR2355, a 16x2 LCD, and a SparkFun Triple Axis Accelerometer Breakout - LIS3DH (with Headers). My issue is that even though I can read the WHOAMI register of the LIS3DH, I can't get ...
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Problem in achieving PWM fading LED effect in PIC24J64GA102
I have been working with pic microcontroller but this is my first time working with PWM to achieve breathing/fading effect on pin rb0. Please help me in achieving fading LED functionality on rb0. I ...
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Rotary Encoder Code Double Counting
I have successfully make my C code on Atmega328 to read my 2 rotary encoders.
(More details here)
I am having an issue with the encoder always incrementing by 2 sometimes 4. I'm not sure where the ...
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Rotary Encoders that share pins with LCD data lines
I am trying to modify some source code for this old digital power supply design
based off the original schematic.
The current schematic with the rotary encoders is this one:
https://drive.google.com/...
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Dividing numbers leaves wronge decimals on stm32ide [closed]
Recently I have faced a problem that did not exist in my code before. When dividing any type of numbers by 10 or 100 or 1000, I get wrong decimals.
For example: 30/100 = 0.29999999
I have tried 30.0/...
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Running a 7-segment display off of a EFR32MG24 dev kit, only segment A turns on
I am trying to get a 7-segment display to run off of an EFR32MG24 dev kit. I know the problem lies in the code, likely in the hex masks or the indexing.
For troubleshooting, I have tried to adjust the ...
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Meaning of 'dead code' in MISRA C standards [closed]
Going through MISRA C 2012 rules, I Noticed one rule about dead code and was a little unclear about the definition of "dead code"
Rule 2.2 States that "There shall be no dead code"
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PIC16F problem, instruction cycles
I want to generate 16 impulses, one for the freq. of 32 kHz and other for 64 kHz. I'm using a PIC16F887 and the freq. of the μC is 1 MHz, which mean 1 instruction cycle = 4 μs.
All I want is for 32 ...
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AVR microcontroller dead after trying to enter debugging session
this is already the second time I encounter this strange problem:
I am using an AVR microcontroller with microchip studio.
I wanted to enter a debugging session with "Start debugging and break&...
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