Trying to debug an issue using Atmel Mega 328p Board.
#include <stdio.h>
#include <avr/io.h>
void main()
{
while(1)
{
printf("hello world,");
}
return;
}
Viewing this port in Tera Term returns nothing at all.
Warning : Implicit declaration of printf();
What could be the problem in our code?
You must initialize UART of the uC and write custom function for redirecting output on it, if you want to view output on tera-term. printf does not output on UART unless it is written in that way.
However in this case, the output of the program can be viewed in the output console of the IDE which you are using.
Related
I've been tring to program on VS Code in C for quite a while now but i can't get the output to go in the correct spot.
As you can see in this really short test code:
#include <stdio.h>
int main()
{
printf("This is a test \n");
}
,and the adjacent image, the output goes to the debug console and not the output tab, or even the terminal
Does anyone have any clue as to why this is happening?
I'm using CGG to compile it
I am using the Adafruit Ultimate GPS breakout module to interface with the beaglebone black using c code. I am using UART 4 for that, but while running after compile it won't show any output. I changed the port name to "dev/ttyO4" in serial.h file.
thank you!!!
git hub link for the library: https://github.com/joyalraju/libgps
#include <stdio.h>
#include <stdlib.h>
#include <gps.h>
int main(void) {
// Open
gps_init();
loc_t data;
while (1) {
gps_location(&data);
printf("%lf %lf\n", data.latitude, data.longitude);
}
return EXIT_SUCCESS;
}
Joyal If you add your code with question make it easy to find out the problem.
I am trying to read a GPIO port from a raspberry pi 2B with C. I am using the wiringPi module and I have written a little program to try it out but it just always prints 0, even if I directly connect the pin to 3.3 or 5V. I also tried pulling it up but then it just always says 1, even when I try connecting it directly to ground. When I tried to read the pin with python it worked correctly so I am at a loss as to what is wrong. The code is as below:
#include <stdio.h>
#include <stdlib.h>
#include <wiringPi.h>
void main(){
wiringPiSetup();
pinMode(4, INPUT);
pullUpDnControl(4, PUD_DOWN);
printf("%d", digitalRead(4));
}
I am running raspbian 7 (wheezy)
I ran a 4 line code and it compiled and linked without a hitch, but it refuses to print anything
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(){
char* a = "book";
printf("%s\n", a);
return 0;
}
After compiling it and running the executable, nothing happens.
No error in the code.
Just write getch(); or getchar() before return 0;
to holding the output screen.
getch() or getchar() will hold the ouput screen for getting the user's input.
Works fine for me.
You've tagged this with terminal; if you are running it from the terminal, you should see some output, in my experience.
If you are running from an IDE,
keep the window open using Kapil K.'s answer;
keep the window open using an IDE setting, if there is one; or
find out where your IDE is putting the executable file, and run that from a terminal.
I am having a problem with a program of mine, as I cannot see the output display. Using a Dev C++ compiler to compile my C program, I debug it to see the output. However my program immediately terminates, so I can't see the output properly.
I ended my program with return 0, and Aldo tried getch(), but even with both endings my program terminates quick.
I want to know if my program endings are wrong, and if so what is the correct way to end a program?
you need the window stop to view the output, is it right?
if yes, include this library
#include <stdlib.h>
then add this line at the end of code:
system("PAUSE");
e.g
#include <stdlib.h>
#include <stdio.h>
int main()
{
/* do/print some thing*/
system("PAUSE");
}