i2c_status_type fuel_gpio_fuel_gpio_i2c_write_addr(u8 val)
{
i2c_state_type state = I2C_FAIL_S;
i2c_status_type status = I2C_FAILURE;
i2c_gpio_type *bus = &i2c_io_info;
if (bus->state == I2C_TX_S)
{ /* Bus already STARTed */
I2C_REP_START_COND();
}
else if (bus->state == I2C_IDLE_S)
{ /* bus not STARTed */
I2C_START_COND();
}
if (fuel_gpio_i2c_write_byte_io(val) == I2C_ACK)
{
/* Write addr byte */
/* State change depend on READ/WRITE */
state = ((val & I2C_IO_MASK) == I2C_IO_MASK_R)? I2C_RX_S: I2C_TX_S;
status = I2C_SUCCESS;
}
else
{
status = I2C_SUCCESS;
}
bus->state = state;
return (status);
}
/*
* Signal a start to the I2C Bus.
*
* A start is signaled when data goes to low in a high clock cycle.
*
* Ends with Clock Low.
*
* Status: not tested
*/
void SkI2cStart(
SK_IOC IoC) /* I/O Context */
{
/* Init data and Clock to output lines */
/* Set Data high */
I2C_DATA_OUT(IoC);
I2C_DATA_HIGH(IoC);
/* Set Clock high */
I2C_CLK_HIGH(IoC);
SkDgWaitTime(IoC, NS2BCLK(T_START_SETUP));
/* Set Data Low */
I2C_DATA_LOW(IoC);
SkDgWaitTime(IoC, NS2BCLK(T_START_HOLD));
/* Clock low without Data to Input */
I2C_START_COND(IoC);
SkDgWaitTime(IoC, NS2BCLK(T_CLK_LOW));
} /* SkI2cStart */