Action

Initializes the SCL and SDA pins.

 

 

Syntax

I2CINIT

I2CINIT #const

 

 

 

Remarks

By default the SCL and SDA pins are in the right state when you reset the chip. Both the PORT and the DDR bits are set to 0 in that case.

When you need to change the DDR and/or PORT bits you can use I2CINIT to bring the pins in the proper state again.

 

For the XMEGA which has multiple TWI interfaces you can use a channel to specify the TWI interface otherwise the default TWIC will be used.

 

 

ASM

The I2C routines are located in i2c.lib. _i2c_init is called.

 

 

See also

I2CSEND , I2CSTART , I2CSTOP , I2CRBYTE , I2CWBYTE , I2C_TWI Library for using TWI

 

 

Example

Config Sda = Portb.5

Config Scl = Portb.7

I2cinit

 

Dim X As Byte , Slave As Byte

X = 0                                                       'reset variable

Slave = &H40                                               'slave address of a PCF 8574 I/O IC

I2creceive Slave , X                                       'get the value

Print X                                                     'print it

 

 

Example XMEGA

Open "twic" For Binary As #4                               ' or use TWID,TWIE oR TWIF

Config TwiC = 100000                                         'CONFIG TWI will ENABLE the TWI master interface

I2cinit #4