public void spi_frequency(ref spi_t obj, int hz)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
((SPI)uif).SetFrequency(hz);
}
public int spi_master_write(ref spi_t obj, int value)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
return(((SPI)uif).MasterWrite(value));
}
public void spi_format(ref spi_t obj, int bits, int mode, int slave)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
((SPI)uif).SetFormat(bits, mode, slave != 0);
}
public int spi_master_block_write(ref spi_t obj,
byte[] tx_buffer, int tx_length,
byte[] rx_buffer, int rx_length, byte write_fill)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
throw new ArgumentException();
}
return(((SPI)uif).MasterBlockWrite(tx_buffer, tx_length,
rx_buffer, rx_length, write_fill));
}
private void DeleteSPI(ref spi_t obj)
{
if (!interfaces.TryGetValue(obj.id, out var uif))
{
return;
}
pin_if.Remove(((SPI)uif).mosi);
pin_if.Remove(((SPI)uif).miso);
pin_if.Remove(((SPI)uif).sclk);
pin_if.Remove(((SPI)uif).ssel);
interfaces.Remove(obj.id);
}
private IUnitInterface CreateSPI(ref spi_t obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
{
var p = PinMap.Peripheral(mosi, PinMap.PinMap_SPI_MOSI);
if (p == (int)PinName.NC)
{
return(null);
}
var t = PinMap.Peripheral(miso, PinMap.PinMap_SPI_MISO);
if ((t == (int)PinName.NC) || (t != p))
{
return(null);
}
t = PinMap.Peripheral(sclk, PinMap.PinMap_SPI_SCLK);
if ((t == (int)PinName.NC) || (t != p))
{
return(null);
}
t = PinMap.Peripheral(ssel, PinMap.PinMap_SPI_SSEL);
if ((t != (int)PinName.NC) && (t != p))
{
return(null);
}
if (!interfaces.TryGetValue(obj.id, out var uif))
{
if (pin_if.ContainsKey(mosi) || pin_if.ContainsKey(miso) || pin_if.ContainsKey(sclk) || pin_if.ContainsKey(ssel))
{
throw new ArgumentException();
}
uif = new SPI((SPIName)p, mosi, miso, sclk, ssel);
obj.id = uif.GetHashCode();
interfaces.Add(obj.id, uif);
if ((mosi == PinName.P4_6) && (miso == PinName.P4_7) && (sclk == PinName.P4_4))
{
obj.fthandle = fthandle;
}
}
return(uif);
}
public void spi_free(ref spi_t obj)
{
DeleteSPI(ref obj);
}
public void spi_init(ref spi_t obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
{
CreateSPI(ref obj, mosi, miso, sclk, ssel);
}