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Hello Everyone!!
While I was trying some online C language quiz, I was stuck in problem where the constraints was to take strings that only have 'R' an 'S' letter. I searched it online and got some suitable resource about the scanset https://www.geeksforgeeks.org/scansets-in-c/. However, I have...
Hi All,
Last night I read an article on choosing correct integer size https://embeddedgurus.com/stack-overflow/2008/06/efficient-c-tips-1-choosing-the-correct-integer-size/. Before reading this article, I was unaware of these three keywords. These keywords are:
1) Fixed width unsigned 8-bit...
Hi,
I am learning RTOS by myself taking ucos-ii and MSP432 evaluation board as a reference. In the reference code, which I download from its website, I find difficulty in creating two tasks(LED Blinking) that have different priorities. In reference code, BSP_Tick_Init() function called in the...
I am working on 16 bit micro-controller (MSP430f67791A) and using IAR compiler. My question is that someone tell me that in a 16 bit micro-controller, if you take a 8bit variable then the CPU would take more instruction cycle to execute it rather than a 16 bit variable.
After his words, I was...
I am trying to learn the RTOS from scratch and for this, I use freeRTOS.org as a reference. I find out this site as a best resource to learn the RTOS. However, I have some doubts and I was trying to find out but not able to get exact answers. The questions are:
1) How to find out that device...
Yes, this is exactly what I want but here with a slight difference. I know that the result will have some negative values, so I want to subtract from the last value to the first one. Means 0002E03D - 0002DECE. With this, I am able to find out exactly the value which I want.
I already found out...
Actually what I am trying to do, this is the code memory allocated size by the module/function written in my project. Now what I have to do, I have to check out that how much amount of memory is been using by EACH function. So as its a lengthy and hectic work, I am thinking to just write a...
Hi,
I want to try to find out that is it possible to reconfigure this value into two of others variables.
e.g.
This is the user input value 0002DECE - 0002E03D
and I want to try to reconfigure it in two variables like 0002DECE & 0002E03D.
Does C language provide us some sort of function to...
Hi all,
Recently I start working on MSP430F6x series micro-controller. I have my reference code and I find out there a keyword __data20
Like
typedef signed long __data20 s32_20;
typedef signed short __data20 s16_20;
typedef signed char __data20 s8_20;
I wants to know what does that means...
I also tried with #include "io.h" but that header file include another header file names features.h. This time again I download it, saved in my current working directory. Now, I have an error with message #include <sys/cdefs.h>
No such file or directory.
Re: [MOVED] #include <sys/io.h> file not found
I am using "make" command to compile my code.
- - - Updated - - -
Please can you elaborate or put some light on your comment
. And of course I use "io/sys.h" in my running directory. But that also not helps.
Hi all,
I am working on writing my device driver code. This time I write code for my DB-25 parallel port, but for this I have to use sys/io.h header file. As per my compiler error, its not found in directory. For this, I download the header file and insert in the directory. But still error...
why kernel assigns 250 as a major number in device driver
Hi all,
I recently stated working on device driver development. Initially, I build a simple driver and application. The thing which I notice are that every time when I inserts my module, kernel assign a major number 250. I wants to know...
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