[CoIDE]If you use printf function in the CoIDE???

printf(namo printf) redirect to the UART under CoIDE 1.7.6

- by irinaKim

 

Download and install CoIDE V1.7.6： 

http://www.coocox.org/Tools/CoIDE-1.7.6.exe

Replace the file "/plugins/org. Coocox. Builder. Ui_1. 0.0.201212141638. Jar" under the CoIDE installation directory   with the documents in the attachment 

Download  GNU Tools for ARM Embedded Processors  Version 4.7

The download address is: 
https://launchpad.net/gcc-arm-embedded/+milestone/4.7-2012-q4-major

Procedures of setting  tool chains in CoIDE  are not detailed descripted here. Below take Cookie board  for example, I'll  introduce the process that  Newlib - nano printf redirect to the UART in CoIDE.

There are three steps in total:

1. Creat a new project and add printf statements

2. Select Newlib - nano, support print floating-point number

3. Redirect to printf

1.Creat a new project and add printf statements

---

 Creat a new M051 project ( How to creat a new project is not described  here)

 Check  the following components:

Add cookie_printf example to the project  in the UART component 

Open the cookie_printf.c file ,then add header file #include <stdio.h> and add a statement  in while（1）cycle like this:  printf("Nano Clib test：int=%d   float=%f\r\n",255,123.456); 

2. Select Newlib - nano, support print floating-point number

-> If you don't use the nano printf, you are pass to the next step(Redirect to printf)  

---

Click the configuration button to enter the configuration:

Enter the link page

Add the following files in Linked Library:

D:\Program Files\GNU Tools ARM Embedded\4.7 2012q4\arm-none-eabi\lib\armv6-m\libc_s.a

D:\Program Files\GNU Tools ARM Embedded\4.7 2012q4\arm-none-eabi\lib\armv6-m\libg_s.a

Note: cookie is M0 so armv6-m

ARM Core	multilib
Cortex-M0+	armv6-m
Cortex-M0	armv6-m
Cortex-M1	armv6-m
Cortex-M3	armv7-m
Cortex-M4	armv7e-m

If you want to  support floating-point print, add   "- u; _printf_float" 

Note : The standard command is" - u _printf_float", But  some changes have to be done to match with CoIDE

3.  Redirect to printf

---

Open syscalls.c，edit code as follows:

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

 * @file     stdio.c

 * @brief    Implementation of newlib syscall

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

#include <stdio.h>

#include <stdarg.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <stdarg.h>

#include "xhw_types.h"

#include "xhw_ints.h"

#include "xhw_memmap.h"

#include "xuart.h"

#undef errno

extern int errno;

extern int  _end;

caddr_t _sbrk ( int incr )

{

  static unsigned char *heap = NULL;

  unsigned char *prev_heap;

  if (heap == NULL) {

    heap = (unsigned char *)&_end;

  }

  prev_heap = heap;

  heap += incr;

  return (caddr_t) prev_heap;

}

int link(char *old, char *new) {

return -1;

}

int _close(int file)

{

  return -1;

}

int _fstat(int file, struct stat *st)

{

  st->st_mode = S_IFCHR;

  return 0;

}

int _isatty(int file)

{

  return 1;

}

int _lseek(int file, int ptr, int dir)

{

  return 0;

}

int _read(int file, char *ptr, int len)

{

  return 0;

}

int _write(int file, char *ptr, int len) {

/////////////////////////////////////////////////// 

///////////// Add by IrinaKim /////////////////////

int txCount;                        

(void) file;

for (txCount = 0; txCount < len; txCount++)

{

xUARTCharPut(xUART0_BASE,*ptr++);

}

///////////////////////////////////////

return len;

}

void abort(void)

{

  /* Abort called */

  while(1);

}

          

/* --------------------------------- End Of File ------------------------------ */

 Download the codes  with ColinkEx you will see serial print information shows as following:

The advantage of  using Newlib-nano can be easily seen from the Program Size 

 

Non-use floating point number:

 Use floating point number: