Error to initialize the sdcard (disk_initialize)

[Renato Silva]

Hi,

I am trying to insert the fatfs code example into my custom project. I already added all the files e dependences and when I call the fatfs_example function from main it works fine and I can to write into SDCARD.

I did it only to test the import, but in my solution I need to call the function that write into sdcard from other function (not main) and when I call the fatfs_example function from other function I have an error.

I am debugging the code and I found that the problem is in the disk_initialize function. In this function, the library sets the m_drives[drv].busy to true, and this state not change to false.

After the m_drives[drv].busy to set to true, has the follow code:

ret_code_t err_code = nrf_blk_dev_init(m_drives[drv].config.p_block_device, block_dev_handler, (void *) (uint32_t) drv);

And so,

if (err_code == NRF_SUCCESS)
{
while (m_drives[drv].busy)
{
m_drives[drv].config.wait_func();
}

(...)

(The error_code value is returning NRF_SUCCESS)

My problem is when the fatfs_example function is called out of the main, the m_drives[drv].busy is always true and tha program does not leave the while above (m_drives[drv].config.wait_func();)

Can anyone help me in this question? Why is can be happening?

[Håkon Alseth]

Hi,

 

Are you calling this from an interrupt? If yes; then you are looping here because you're waiting for another interrupt, configured with lower or equal priority as the one you're in.

Could you try scheduling the function call to main context instead?

 

Best regards,

Håkon

[Renato Silva]

Hi Alseth,

Unfortunally I cant change the function call to main context because I need to write into sdcard when the the firmware receive a bluetooth message. 

Summing up, I have some develop boards and when one board sends to another board, the board that received the bluetooth message must to save the message into sdcard.

How I can change the priority these interrupts or how I how I can to do to discovery which interrpt is  preventing the firmware to write into sdcard?

[Håkon Alseth]

You can set a flag, then later handle the data in your main loop, but if you do not want to do this you can change the SPI interrupt priority:

If you have copied most of the functions from example "fatfs", then you can change sdk_config.h::SPI_DEFAULT_CONFIG_IRQ_PRIORITY to '6'.

 

Best regards,

Håkon