http://www.esacademy.com/faq/i2c/

The first time I used the I2C protocol was with an old-venerable 8051 derivative (8 years ago) and our team implemented the protocol using two general purpos pins (“bit-banging”) for SDA and SCL.

Looking back they were very fun days…not so productive to the management, but very fun to us developers !

int main(int argc, char * argv[])

{

printf(“\nWelcome to my blog !\n”);

return 0;

}