How can print fr value on UART ?

[bianchi77]

Guys,

How can I print fr to UART ?

 fr = f_open(&MyFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE);
HAL_UART_Transmit(&huart1, fr, 32, 1); // Debug

I got this error :

..\Src\main.c(85): error: #167: argument of type "FRESULT" is incompatible with parameter of type "uint8_t *"

 

[Daniel_Arg]

While someone can know exactly how to solve this error, most of us will need some more context. It seems that you are feeding the function a data type that it's not expecting.

Which line of code is generating the error? You should check on the prototype of the function which data type it uses.

 

[bianchi77]

I want to transmit "res" into UART buffer :

FRESULT f_open (
	FIL* fp,			/* Pointer to the blank file object */
	const TCHAR* path,	/* Pointer to the file name */
	BYTE mode			/* Access mode and file open mode flags */
)
{
	FRESULT res;

I want to print "res" to UART buffer

void Transmit_String_ff(unsigned char *s)
{
  HAL_UART_Transmit(&huart1, s, strlen(s), 1000); // As a pointer, with a length
}

I can't do

Transmit_String_ff(res)

I got this error,
error: #167: argument of type "FRESULT" is incompatible with parameter of type "unsigned char *"

How can I fix it ? thanks

 

[pic.programmer]

Show the code of FRESULT type.

 

[bianchi77]

Show the code of FRESULT type.

/* File function return code (FRESULT) */

typedef enum {
	FR_OK = 0,				/* (0) Succeeded */
	FR_DISK_ERR,			/* (1) A hard error occurred in the low level disk I/O layer */
	FR_INT_ERR,				/* (2) Assertion failed */
	FR_NOT_READY,			/* (3) The physical drive cannot work */
	FR_NO_FILE,				/* (4) Could not find the file */
	FR_NO_PATH,				/* (5) Could not find the path */
	FR_INVALID_NAME,		/* (6) The path name format is invalid */
	FR_DENIED,				/* (7) Access denied due to prohibited access or directory full */
	FR_EXIST,				/* (8) Access denied due to prohibited access */
	FR_INVALID_OBJECT,		/* (9) The file/directory object is invalid */
	FR_WRITE_PROTECTED,		/* (10) The physical drive is write protected */
	FR_INVALID_DRIVE,		/* (11) The logical drive number is invalid */
	FR_NOT_ENABLED,			/* (12) The volume has no work area */
	FR_NO_FILESYSTEM,		/* (13) There is no valid FAT volume */
	FR_MKFS_ABORTED,		/* (14) The f_mkfs() aborted due to any parameter error */
	FR_TIMEOUT,				/* (15) Could not get a grant to access the volume within defined period */
	FR_LOCKED,				/* (16) The operation is rejected according to the file sharing policy */
	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated */
	FR_TOO_MANY_OPEN_FILES,	/* (18) Number of open files > _FS_SHARE */
	FR_INVALID_PARAMETER	/* (19) Given parameter is invalid */
} FRESULT;

It's part of ChanFATFs

 

[pic.programmer]

Try this.

---

Code C - [expand]
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unsigned int res;
char sprintf_buffer[20];
 
void main() {
 
    while(1) {
        res = f_open (...);
        sprintf(&sprintf_buffer, "%5u", res);
        
    }
}

---

 

[bianchi77]

Try this.

---

Code C - [expand]
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unsigned int res;
char sprintf_buffer[20];
 
void main() {
 
    while(1) {
        res = f_open (...);
        sprintf(&sprintf_buffer, "%5u", res);
        
    }
}

---

Ok I'll try

- - - Updated - - -

I got this error :

..\Src\main.c(97): error:  #167: argument of type "unsigned char (*)[20]" is incompatible with parameter of type "char *restrict"

 

[pic.programmer]

Getting error with my code ?

Post code of line 97 of main.c file.

 

[bianchi77]

sprintf(&sprintf_buffer, "%5u", res);

 

[pic.programmer]

Try this

---

Code C - [expand]
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unsigned int res;
unsigned char sprintf_buffer[20];
 
void main() {
 
    while(1) {
        res = f_open (...);
        sprintf(&sprintf_buffer, "%5u", res);
        
    }
}

---

What Compiler are you using ? What MCU ?

 

[bianchi77]

it gives me the same result

..\Src\main.c(97): error:  #167: argument of type "unsigned char (*)[20]" is incompatible with parameter of type "char *restrict"

	unsigned int res;
  unsigned char sprintf_buffer[20];
sprintf(&sprintf_buffer, "%5u", res);

I'm using Keil MDK, MCU = STM32

Any ideas ?

 

[pic.programmer]

sprintf usage in Keil

https://www.keil.com/support/man/docs/c51/c51_sprintf.htm

**broken link removed**

Try

---

Code C - [expand]
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unsigned int res;
char sprintf_buffer[50];
 
void main() {
 
    while(1) {
        res = f_open (...);
        sprintf(sprintf_buffer, "%5u", res);
        
    }
}

---

 

[bianchi77]

it can be compiled but I can not see anything on serial buffer, code :

res=f_open(&MyFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE);
				Transmit_String("F_OPEN result:\n");
				sprintf(sprintf_buffer, "%5u", res);

At the buffer :

F_OPEN result:

 

[pic.programmer]

Please post your full code or zip and post your complete Keil project file. I need to see the USART transmit code. Is baudrate correct ? Have you printed test string to see if UART is working properly ?

---

Code C - [expand]
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res = f_open(&MyFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE);
sprintf(sprintf_buffer, "%5u", res);
strcat(sprintf_buffer, "\r\n");
Transmit_String(sprintf_buffer);

---

Assuming Transmit_String() function takes one string argument. Please post the complete code of Transmit_String() function.

Show UART initialization code. What baudrate are you using ?