FATFs f_open ?

[antonius]

Posted on February 25, 2017 at 23:02

Everybody,

Why isn't my f_open working properly ?

I tried the example from UM1718 but stack on f_open.

Is SDIO initialized properly ?

here's the code :

/TEST SDIO begin

if(retSD == 0)            {                printf('inside if retSD \n');                HAL_GPIO_WritePin(GPIOE, GPIO_PIN_6, GPIO_PIN_RESET);                HAL_Delay(1000);                /*♯♯-2- Register the file system object to the FatFs module ♯♯♯*/                    if(f_mount(&SDFatFs, (TCHAR const*)SD_Path, 0) != FR_OK)                        {                            /* FatFs Initialization Error : set the red LED on */                            HAL_GPIO_WritePin(GPIOE, GPIO_PIN_5, GPIO_PIN_SET);                            HAL_Delay(100);                            HAL_GPIO_WritePin(GPIOE, GPIO_PIN_5, GPIO_PIN_RESET);                            printf('FMOUNT FAIL! \n');                                while(1);                        }                         else                             {                                printf('inside else on f_mount \n');                                printf('f_mount OK! \n');                                HAL_GPIO_WritePin(GPIOE, GPIO_PIN_5, GPIO_PIN_SET);                                HAL_Delay(1000);                                HAL_GPIO_WritePin(GPIOE, GPIO_PIN_5, GPIO_PIN_RESET);                                // it's stopped here                             res = f_open(&MyFile, 'hello.txt', FA_CREATE_ALWAYS | FA_WRITE);                                                                printf('after res command!');

I diagnosed from serial :

inside if retSD

inside else on f_mount f_mount OK!

Anyone can help please ?

Thanks

#fatfs-sdio #sdio #stm32f103

[antonius]

Posted on February 25, 2017 at 23:03

The code is based from UM1718 page 194

[Imen.D]

Posted on March 01, 2017 at 12:10

Hi,

You may refer and get inspired from one of the provided FatFS applications with STM32CubeF1 firmware package. Compare your generated code with working example as this one:  STM32Cube_FW_F1_V1.4.0\Projects\STM3210C_EVAL\Applications\FatFs

May this

can helps you.

Imen

[antonius]

Posted on March 01, 2017 at 22:29

I got it work already,

changing the SDIO init speed will fix it.