I´m currently trying to implement the WIZnet I2C TCP/IP Demo into my project with an AT91SAM7S (Rowley GCC).
The WIZNet Demo uses a Philips LPC210x.
In i2c.c it simply starts the I2C communication with setting the start condition:
I2C_I2CONCLR = i2cSI_BIT;
I2C_I2CONSET = i2cSTA_BIT;
then waits for an IRQ and goes on in the ISR in i2cISR.c.
Therefore its necessary that on every I2C state change occurs an IRQ. The LPC does it(?).
When my Atmel datasheet informs my correctly the AT91SAM7S isn´t able to do this.
So I have to implement nearly the whole Write/Read procedure in i2c.c ???
(I think I can only get an IRQ after transmit has finished ?)
Has anybody else done this with an Atmel?