A variable in C/C++ which stores the type and location of data in memory.
0
votes
3answers
105 views
ISR executes even though an interrupt is not trigerred
I am trying to implement a function queue scheduling system. INT1 is connected to a button and int1task causes a LED to flash.
typedef void (*funcptr)(void);
TPrioQueue *queue = NULL;
void ...
0
votes
1answer
120 views
Wrong Mouse.move() output in Arduino Leonardo
I'm using my Arduino Leonardo as a Mouse but I'm experimenting a strange behaviour.
I put my mouse at (-1, -1) (absolute) coordinates and then I execute this code:
Move.move(com[curr_cmd_id].x, ...
1
vote
3answers
229 views
Is it bad coding practice to design a buffer using pointers?
I coded a ring buffer for my Arduino to buffer data from either the SPI or TWI ports. In the .h file I used a pointer for the buffer:
typedef uint8_t *ring_buffer_t;
typedef uint8_t ring_count_t;
...
7
votes
1answer
229 views
Are function pointer assignments atomic in Arduino?
The following snippets are from TimerOne library source code:
// TimerOne.h:
void (*isrCallback)();
// TimerOne.cpp:
ISR(TIMER1_OVF_vect) // interrupt service routine that wraps a user defined ...
1
vote
1answer
431 views
How to use String.substring?
I have the following code in which requestLine is always empty and I can't figure out why. request contains a raw HTTP request, and I want to get the first line of the request which contains the ...
7
votes
2answers
2k views
Why can I not use pointers instead of array with PROGMEM?
I'm currently changing some libraries to use flash instead of RAM for string storage so that I do not run out of SRAM on a project.
Some strings in the library are declared in this manner:
const ...
