Linked Questions
11 questions linked to/from Is using malloc() and free() a really bad idea on Arduino?
19
votes
5
answers
191k
views
How can I declare an array of variable size (Globally)
I'd like to make three arrays of the same length. According to the documentation, Arrays must be defined as int myArray[10]; where 10 can be substituted for a known length (another integer), or filled ...
- 293
12
votes
4
answers
9k
views
Why is it considered bad practice to use the 'new' keyword in Arduino?
I previously asked this question:
Is it required to delete variables before going to sleep?
On that question, @Delta_G posted this comment:
... Really on a microcontroller I would create the object ...
- 986
3
votes
2
answers
4k
views
AVR - How to know that there is collision between stack and heap or the memory has filled?
I am using the dynamic memory in AVR microcontroller, so How to know that there is collision between stack and heap or if the memory has been filled?
- 145
0
votes
1
answer
7k
views
Slice string at “:”
I need to slice a string (eg- 4:288:18464:288:4) at ":" into an array({4, 288, 18464, 288, 4}) I used the following code, but its giving only '4' in the serial monitor when "4:288:18464:288:4," is ...
- 83
2
votes
3
answers
1k
views
Using malloc() and free() for a stack/linkedlist [closed]
I know this question has been asked before, however it was asked two years ago and I have some other constraints to add.
(Previous question here) : Is using malloc() and free() a really bad idea on ...
- 145
0
votes
2
answers
2k
views
How to write a function to return matrix?
I need a function to return a 2x2 rotation matrix, something like:
float matrix(float phi){
float R[2][2] = { {cos(phi), -sin(phi)},
{sin(phi), cos(phi)} };
return R;
}
But it ...
- 149
6
votes
1
answer
751
views
Understanding global variables on Arduino
I am rewriting a set of LED manipulation functions to be more object oriented, and I have found that, mysteriously, my global variable memory space has been over consumed, despite a reduction of the ...
- 61
2
votes
3
answers
243
views
Simple compiler design help: Variable length arrays in Arduino?
I'm trying to write a simple compiler in the Arduino language that I am making up for my lab. The compiler will have to be able to turn a string like this:
"do command_one 3 times"
into a data ...
- 173
2
votes
1
answer
488
views
What happens when you call malloc()/free()/new/delete?
So I understand that generally speaking, dynamic allocation should be avoided. My question isn't how or why, but what happens when you call a function that allocates memory?
On Windows or Linux, when ...
- 129
1
vote
0
answers
524
views
Understanding heap fragmentation
I finally understand why people do not allocate memory when it comes to micro-controllers. The reason is because as you allocate different objects on the heap of various sizes and then you delete them ...
- 986
0
votes
2
answers
212
views
Add char at intervals in a String
I'm trying to create a function that will take a String as an input, and at every 20 characters, it will instert "\n" so that the string doesn't go off the side of my screen (I'm using an ...
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