ST25DV HOW TO USE FAST MAILBOX ?

[oziesin]

How can i use FTM buffer i do not understand what should I do exactly. I have problems first step. I can read all block of system memory , user memory and dynamic registers also i can write on user memory(EEPROM) but when i try to initalize Fast transfer mode , i encountered problem that cannot change static configuration registers like i want. 

I am waiting your advises.

[Brian TIDAL]

Hi,

X-CUBE-NFC4 software package provides a mailbox application example with source code. This can help you to develop your own application.

Rgds

BT

[oziesin]

Thanks for reply,

I am going to check it.

[oziesin]

Basically, why the problem that writing incorrect value on static registers exist. it can be anyone of them. I cannot understand where is the problem ? Software part or hardware part. I confused. What could I be missing ?

[Brian TIDAL]

Hi,

have you followed §4.3 of the datasheet: "static registers located in the system configuration area can be accessed with I2C read and write

commands with device select E2=1. Readable system areas could be read in continuity. I2C security session must first be open, by presenting a valid I2C password, to grant write access to system configuration registers."

I would recommend to base your development on middleware provided on st.com rather that starting from scratch. An example of FTM is provided in X-CUBE-NFC4. Also, a user lever FTM library is provided as part of the ST25 Embedded NFC library . See AN5512 ST25 fast transfer mode embedded library. This FTM library provides support for chaining, error detection and recovery.

Feel free to provide more information about your application .

Rgds

BT

[oziesin]

Thank you for interest, I read I2CSSO Pin in dynamic register and it is open. My application is simple if you want i can share some code. I do not want to use high level libraries, i want to do that from scratch. I am going to look at AN5512. I have been reading datasheet for 1 week , i've looked almost in all. May be I missed something, but i can read/write eeprom block and i can read all memory section so really i started to thinking about that ic is damaged.

[Brian TIDAL]

Hi,

basically, the following steps should work:

• 1 - read the MB_MODE bit in the MB_MODE register
• 2 - if the MB_MODE is not set, read the I2C_SSO bit in I2C_SSO_Dyn
  • 2.1 - if the I2C_SSO is not set, present the i2C password. Check the I2C_SSO bit in I2C_SSO_Dyn
  • 2.2 - set the MB_MODE bit ( (@0x000D, slave address 0xAE)
• 3 - Security session can be closed
• 4 - set MB_EN in MB_CTRL_Dyn  (@0x2006, slave address 0xA6).

Feel free to share your code

Rgds

BT

[oziesin]

 uint8_t errCnt, status[10];
 
  iDrvNfc_I2C_Read(I2C2,ST25DV_ADDR_DYN_REG_READ_I2C,ST25DV_EH_CTRL_DYN_REG,(uint8_t*)&status[0],1);	// Read vcc status
	if (!(status[0] & 1<<3))
	{
		++errCnt;			// ERROR VCC is not present
	}
uint8_t  psw [ 8 ];
memset (&psw, 0 , 8 );	// psw = 00000000 (8byte)
iDrvNfc_I2C_Read(I2C2,ST25DV_ADDR_SYST_READ_I2C,ST25DV_MB_MODE_REG,(uint8_t*)&status[1],1);					// 1 - read the MB_MODE bit in the MB_MODE register
  if( ! (status[1] & 1) )
	{
  	e_psw e_psw_t = iDrvNfc_I2C_Present_Password( psw ); if(e_psw_t){};																//	2.1 - if the I2C_SSO is not set, present the i2C password. Check the I2C_SSO bit in I2C_SSO_Dyn
    iDrvNfc_I2C_Write(I2C2,ST25DV_ADDR_SYST_WRITE_I2C,ST25DV_MB_MODE_REG,(uint8_t*)1,1);							// 2.2 - set the MB_MODE bit ( (@0x000D, slave address 0xAE)
    iDrvNfc_I2C_Read(I2C2,ST25DV_ADDR_SYST_READ_I2C,ST25DV_MB_MODE_REG,(uint8_t*)&status[2],1);				// 1 - read the MB_MODE bit in the MB_MODE register
 
	}
  iDrvNfc_I2C_Write(I2C2,ST25DV_ADDR_DYN_REG_WRITE_I2C,ST25DV_MB_CTRL_DYN_REG,(uint8_t*)1,1);					// 4 - set MB_EN in MB_CTRL_Dyn  (@0x2006, slave address 0xA6).
  iDrvNfc_I2C_Read(I2C2,ST25DV_ADDR_DYN_REG_WRITE_I2C,ST25DV_MB_CTRL_DYN_REG,(uint8_t*)&status[3],1);	//  - read the MB_EN in the MB_CTRL_Dyn 	

 

• You can see the values till 4th byte after debug session.Other bytes are garbage.
• These functions are mine and works properly. Actually these are almost same HAL library functions but includes LL library.
• These macros are in st25dv.h and st25dv_reg.h written by ST almost all of them.
• Finally, still problem is constant. Any suggestion make me so happy :)

[Brian TIDAL]

Hi,

are you sure that Address AEh/AFh are being used when writing/reading MB_MODE register? Can you connect a logic analyzer and provide a trace?

Rgds

BT

[oziesin]

Thanks for helps i will try logic analyzer or i can try new hardware