ref: 8a788aea84aad3bfbd5b39d78c1925654f3b9e14
dir: /os/sa1110/i2c.h/
/* i2cgpio.c */ int i2c_write_byte(uchar addr, uchar data); int i2c_read_byte(uchar addr, uchar *data); void i2c_reset(void); extern unsigned char i2c_iactl[]; int i2c_setpin(int b); int i2c_clrpin(int b); int i2c_getpin(int b); /* GPIO pin assignments (0->31) - defined in arch????.c */ extern int gpio_i2c_sda; /* in/out, as per i2c protocol */ extern int gpio_i2c_scl; /* in/out, as per i2c protocol */