STM32 RT thread virtual file system mount operation

of RT-Thread Introduction to virtual file system , I won't go into details here , Self check what you need to know RT-Thread Document center --> Components –> Virtual file system RT-Thread Document center I will only talk about the configuration, mounting and final operation , Specific documents related API View documents by yourself .

---

Specific steps

• Step one
  - First you need to have a bsp file , If there is no need to look down

• Step two

  • open stm32cubemx To enable configuration

  
  - 2.
  At this time, only relevant settings are configured , Not yet sd Add to device
  
  Step three , To write Kconfig To add sd equipment , reference rtthread Source code bsp in stm32 Any one of board Medium kconfig, Add these two pieces of code Kconfig（board --> Kconfig）
  

Step four ： open menuconfig, Turn on sd Device drivers

1. 

3.

4 . Open the virtual file system dfs

6. Recompile project , And download to the development board

Step five ：
Here you can see that there are already sd Device registered

Step six ： Mount the file system to sd equipment , Pay attention to adding relevant paths and header files

#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>

/* defined the LED0 pin: PB1 */
#define LED0_PIN    GET_PIN(B, 0)

static rt_device_t  sd_card = RT_NULL;

int main(void)
{
    int count = 1;
    /* set LED0 pin mode to output */
    rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);

//    while (count++)
//    {
//        rt_pin_write(LED0_PIN, PIN_HIGH);
//        rt_thread_mdelay(100);
//        rt_pin_write(LED0_PIN, PIN_LOW);
//        rt_thread_mdelay(100);
//    }

		// Virtual file system test 	
		rt_thread_mdelay(5000); // This delay is guaranteed sd The card has an initial time 
    sd_card = rt_device_find("sd0"); 
	  if(sd_card != RT_NULL)
				{
				   	rt_kprintf("sd card find ok\n");
#if 0
					  if(0 == dfs_mkfs("elm","sd0")) // Format file system 
						{
						   rt_kprintf(" Format file system successfully \n");
						}
						else
						{
						   rt_kprintf(" Failed to format file system \n");
						}
#endif
					  if (0 == dfs_mount("sd0","/","elm",0,0))  // Mount file system 
						{
						    rt_kprintf(" File system mounted successfully \n");
						}
						else
						{
						   rt_kprintf(" File system mount failed \n");
						}
				}
				else
			 {
				 rt_kprintf("sd card find err\n");
			 }
        rt_thread_mdelay(100);
		
    return RT_EOK;
}

Step seven ： Download the program to the development board , Check whether the device is successfully mounted

It shows that the file is successfully mounted , And the relevant operations of the file appear finsh Instructions , At this time, you can call the virtual file related API To realize the operation of virtual file system .

---

• Be careful , If sd The card was not successfully attached , Multiple reset , Download the program again , Sometimes it is .