private IUnitInterface CreateI2C(ref i2c_t obj, PinName sda, PinName scl)
{
var p = PinMap.Peripheral(sda, PinMap.PinMap_I2C_SDA);
if (p == (int)PinName.NC)
{
return(null);
}
var t = PinMap.Peripheral(scl, PinMap.PinMap_I2C_SCL);
if ((t == (int)PinName.NC) || (p != t))
{
return(null);
}
if (!interfaces.TryGetValue(obj.id, out var uif))
{
if (pin_if.ContainsKey(sda) || pin_if.ContainsKey(scl))
{
throw new ArgumentException();
}
uif = new I2C((I2CName)p, sda, scl);
obj.id = uif.GetHashCode();
interfaces.Add(obj.id, uif);
if ((sda == PinName.P1_7) && (scl == PinName.P1_6))
{
obj.fthandle = fthandle;
obj.ftsda = 5;
obj.ftscl = 4;
}
}
return(uif);
}
public int i2c_byte_write(ref i2c_t obj, int data)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
return(((I2C)uif).ByteWrite(data));
}
public int i2c_byte_read(ref i2c_t obj, int ack)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
return(((I2C)uif).ByteRead(ack));
}
public int i2c_stop(ref i2c_t obj)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
return(((I2C)uif).Stop() ? 1 : 0);
}
public void i2c_frequency(ref i2c_t obj, int hz)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
((I2C)uif).SetFrequency(hz);
}
public int i2c_write(ref i2c_t obj, int address,
byte[] data, int length, int repeated)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
return(((I2C)uif).Write(address, data, length, repeated));
}
private void DeleteI2C(ref i2c_t obj)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
return;
}
pin_if.Remove(((I2C)uif).sda);
pin_if.Remove(((I2C)uif).scl);
interfaces.Remove(obj.id);
}
public void i2c_init(ref i2c_t obj, PinName sda, PinName scl)
{
CreateI2C(ref obj, sda, scl);
}