Kinetis Microcontrollers中的主题 Re: How do I get printf output to a console?

How do I get printf output to a console?

AlexGiov — Thu, 08 Sep 2011 20:55:31 GMT

I can not to have the printf output on console in a simple design (without MXQ and Process Expert).

My configuration is:CW10.1 based on eclipe, TWR-K60N512-KIT, and I debug the project "helloword" adn "gpio" in the code example "KINETIS512_SC.zip".
is it possible in this case to get printfout on console?

Re: How do I get printf output to a console?

Jiun_Yong — Mon, 12 Sep 2011 12:16:48 GMT

I got the gpio demonstartion working last week, so I may be able to help

Once you have opened the gpio project, go to the "Sources" folder, then the "platforms" forder and open file k60_tower.h

At the end of this file is a section titled /* * Serial Port Info */

If you are using the tower with the separate serial/USB/Ethernet ports then uncomment the line

#define SERIAL_CARD // use this option for serial port on TWR-SER

and comment out the line

//#define OSJTAG // use this option for serial port over the OS-JTAG circuit

Rebuild the project and debug.

Connect the serial port on the tower to a serial port on your PC, and use Hyperterminal - set the communications speed to 115200 baud.

Good luck!

Re: How do I get printf output to a console?

AlexGiov — Mon, 12 Sep 2011 21:25:42 GMT

Sorry

I explained badly the problem that I have.
I am using CodeWarrior 10.1 (based on eclipse) on windows 7
I would like to get printf output to the console windows of CodeWarrior (based on Eclipse).

I use this setting but i can get the printf output on eclipse window console:

//#define SERIAL_CARD // use this option for serial port on TWR-SER
#define OSJTAG // use this option for serial port over the OS-JTAG circuit

Alex

http://www,pemicro.com/osbdm

Re: How do I get printf output to a console?

AlexGiov — Mon, 12 Sep 2011 22:20:36 GMT

Sorry again...

I would say:

i CAN'T get the printf output on eclipse window console:

//#define SERIAL_CARD // use this option for serial port on TWR-SER
#define OSJTAG // use this option for serial port over the OS-JTAG circuit

Alex

Re: How do I get printf output to a console?

gustavod — Tue, 13 Sep 2011 03:53:02 GMT

Hi Alex,

In our demo we use the printf for console and it is working. You can download the code here:

http://code.google.com/p/brtos/downloads/list

We used the console printf for Thread-Metric analysis, like this:

printf("**** Thread-Metric Basic Single Thread Processing Test **** Relative Time: %u\n\r", relative_time);

If you do not have TWR-LCD i would like to recommend you this demo:

http://brtos.googlecode.com/files/BRTOS%201.65%20Kinetis%20-%20USB.rar

Have you ever tried to mark the option in the attached figure?

Best regards,

Gustavo

Re: How do I get printf output to a console?

AlexGiov — Thu, 15 Sep 2011 22:18:50 GMT

Hi all,

thank all for your help.

I've solved my problem.

A little report.

Gustav your examples compile perfect and put the printf out directly on eclipse console (i've downloaded the builded code into flash).

The freescale example in "KINETIS512_SC.zip" put the code only on serial card (TWR-SER) or OSJTAG. This's because in this example it's writen a new printf function (printf.c) declared in io.h. So if you use the printf in printf.c you get output on TWR-SER or OSJTAG.
To get printf output on eclipse console you need to use # include <stdio.h> instead of # included "io.h" and do not compile printf.c

Explained by code:
common.h:
/*
* Include common utilities
*/
    /* Alex:
    * to get output through serial port (OSJTAG or SERIAL_CARD on TWR-SER)
    */
//#define IO_ON_SERIAL
#define IO_ON_ECLIPSE_CONSOLE

#include "assert.h"

//Alex: including the IO
#if (defined(IO_ON_SERIAL))
#include "io.h"
#elif (defined(IO_ON_ECLIPSE_CONSOLE))
#include <stdio.h>
#else
#error "Alex: No IO defined!!!"
#endif

printf.c
/*
* File:        printk.c
* Purpose:     The standard C library routine printf(), but without
*              all the baggage.
*/

#include "common.h"
/* Alex:
* Compile this file only if you want IO on serial card or OSJTAG
*/
#if (defined(IO_ON_SERIAL))
#include <stdarg.h>

/********************************************************************/

typedef struct
{
    int dest;
    void (*func)(char);
    char *loc;
} PRINTK_INFO;

int ...continue the printf...

Alex.

Re: How do I get printf output to a console?

PaoloRenzo — Mon, 19 Sep 2011 00:02:45 GMT

I use the following file to redirect to external serial port. Look at the example code. This is the same as semihosting or retarget concept coming from other ARM compilers.

Hope this helps