FAT32_Dir() How to save results to a file or display on TFT

[Brett_S]

Hi,

I have an application where I wish to use the FAT32 Library. One of the tasks I wish to perform is display the directory contents on screen.

The FAT32 Library help file description says "Displays contents of the current directory via user-defined medium (i.e. UART module, a file on FAT32 file system). The function displays character by character".

Exactly how is the definition of the medium achieved? The FAT32_Dir() function only returns success or failure, so where does the directory list go?

The example provided with the FAT32 Library is simply
err = FAT32_Dir();
UART_Write(CR);

How does the data get into the UART buffer?

I am using mikroC PRO for ARM ver 4.5 and the EasyMX PRO v7 Development board.

Thanks for your assistance

Regards

Brett

[darko.minic]

Hello,

I tried FAT32 example with my EasyMx Pro v7 with STM32F207, and I was able to read contents of directory via USART terminal.
If I understand correctly you didn't managed to successfully read contents of directory via USART terminal?

Regards,
Darko

[Brett_S]

Hi Darko,

Thank you for your reply.

I was able to get the example to work.

My problem is that I wish to place the data in a file on the FAT32 file system NOT send it to the USART.

The Help File installed with the FAT32 Library says that the FAT32_Dir() function can be configured to place the results of the function (directory contents) in a file on the FAT32 file system, however there is no explanation as to how this is achieved.

How do I define the medium to which the FAT32_Dir() function will display its results?
By what form of magic does the FAT32_Dir() function place the result in the USART buffer?

Thanks again

Brett

[darko.minic]

Hi Brett,

I can recommend you to search our Libstock Website to see whether some user posted project which may help you.
There is plenty projects related to FAT32 library, please refer following link:
http://www.libstock.com/

Regards,
Darko

[Brett_S]

I'm sorry Darko, I don't find your response satisfactory.

I have asked a reasonable question with regard to the function of your product. The documentation on the FAT32_Dir function clearly states that it can be configures, however offers no explanation as to how. I would like to know how this is achieved.

To tell me to search libstock to see if "some user" has an example is highly unprofessional.

If you do not know how to answer my question please escalate my request to someone who does.

Brett

[darko.minic]

Hi Brett,

I mentioned Libstock because you can there find examples which can help you to understand how FAT32_Dir() function works.

I wrote some simple example how to displays contents of the current directory with FAT32_Dir() via UART:

Code: Select all

UART1_Init(115200);
Delay_100ms();
  
UART1_Write_Text("Test");

SPI3_Init_Advanced(_SPI_FPCLK_DIV64, _SPI_MASTER | _SPI_8_BIT |
                       _SPI_CLK_IDLE_LOW | _SPI_FIRST_CLK_EDGE_TRANSITION |
                       _SPI_MSB_FIRST | _SPI_SS_DISABLE | _SPI_SSM_ENABLE | _SPI_SSI_1,
                       &_GPIO_MODULE_SPI3_PC10_11_12);
Delay_100ms();

while(FAT32_Init() != 0)
  ;
  
UART_Write_Text("Init OK");
UART_Write(CR);

FAT32_Dir();
UART_Write(CR);

If you want for example to displays contents of the current directory on TFT, you should adjust following lines of code in __Lib_FAT32_Driver_STM32.c:

Code: Select all

////////////////////////////////////////////////////////////////////////////////
//
//  Dev_PutChar() is used by FAT32_Dir function for printing the contents
//  of the current folder, which is done 1 character at the time.
//
//  User may change this function to reroute that on some other device,
//  GLCD, TFT, Flash, EEPROM, or Ethernet module, to name a few.
//
//  It must return Returns OK on success and ERROR on failure.
//
////////////////////////////////////////////////////////////////////////////////
int8 FAT32_Put_Char(char ch)
{
    UART_Write(ch);
    return OK;
}

Regards,
Darko

[DennisMclean]

Brett_S: Did you get the FAT32_Dir to work on the TFT?
I can help you with a solution if you still needd one.
Dennis

[Yousaf_Esolz]

Hi DennisMclean,
Can you tell me, how you used that FAT32_Dir() for displaying the directory contents.
I need all the directory contents to be displayed on UART5.
I tried

Code: Select all

UART5_Write(FAT32_Dir());

Also I tried

Code: Select all

FAT32_Dir();
UART5_Write(CR);

But nothing happened.
Will be waiting for the response.

Yousaf

[stefan.filipovic]

Hi Yousaf,

You can try it in this way:

Code: Select all

UART_Set_Active(&UART5_Read, &UART5_Write, &UART5_Data_Ready, &UART5_Tx_Idle);
FAT32_Dir();
UART_Write(CR);

Kind regards,

[Richie]

How do I read the directory and store it (as a text file) on the card ?

Thanks

[stefan.filipovic]

Hi,

Please refer to Darko's post above.

Kind regards,

[Richie]

filename = "TESTFILE.txt"
FAT32_Open(@filename, FILE_WRITE_F32)
FAT32_Dir()
FAT32_Put_Char(SD_data)
FAT32_Write(0, @SD_data, 1)
FAT32_Close(0)

The above does not work.

How do you test that the Dir command has finished ?

[stefan.filipovic]

Hi Richie,

Have you adjusted the FAT32_Put_Char function in __Lib_FAT32_Driver_STM32.c file as Darko described?

How do you test that the Dir command has finished ?

It will return 0 when writing on the user-defined medium was successful.

Kind regards,

[ali abbasi]

Hello everyone

How to display the directory of a microSD on a TFT LCD with FT810 module?

Kind regards,