AN2399

Overview of RFID reader using STR710

13/22

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data width: 8-bit

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Ack bit: enabled

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Speed config: the user must configure it via I2C_frequency define in device_RFID.h file.

void init_CRX14_I2C(void){

u32 f_RFID=I2C_frequency;

/*----------------------------------------------------------------------------------

----------------------------------------

Configure the SDA And the SCL pin of the I2C0 and I2C1 to alternate function Open

Drain

------------------------------------------------------------------------------------

---------------------------------------*/

GPIO_Config (GPIO1,I2C0_SCL,GPIO_AF_OD);

GPIO_Config (GPIO1,I2C0_SDA,GPIO_AF_OD);

/*----------------------------------------------------------------------------------

----------------------------------------

Configure I2C0 module

------------------------------------------------------------------------------------

---------------------------------------*/

I2C_Init (I2C0);

I2C_FCLKConfig (I2C0);

I2C_OnOffConfig (I2C0, ENABLE);//Enable the I2C0

I2C_SpeedConfig (I2C0, f_RFID);//Configure the I2C0 speed

I2C_AddressConfig (I2C0,0xA2, I2C_Mode7);

//Configure the I2C0 address (to be used specially when this cell has to be adressed)

I2C_AcknowledgeConfig (I2C0, ENABLE);

//set str7 to send ack when receive data

}