public static byte smbDetect(byte addr)
{
Ring0.WriteSmbus(SMB_HSTADD, (addr << 1) | SMB_WRITE);
Ring0.WriteSmbus(SMB_HSTCNT, 0);
if (transaction() == true)
{
return(addr);
}
return(0x00);
}
public static byte smbDetect(byte addr)
{
Ring0.WriteSmbus(SMBHSTADD, ((addr & 0x7f) << 1) | SMB_WRITE);
Ring0.WriteSmbus(SMBAUXCTL, Ring0.ReadSmbus(SMBAUXCTL) & (~SMBAUXCTL_CRC));
int res = transaction(0x00);
Ring0.WriteSmbus(SMBAUXCTL, Ring0.ReadSmbus(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B));
return((res < 0) ? (byte)0x00 : addr);
}
public static ushort getWord(byte addr, byte command)
{
Ring0.WriteSmbus(SMB_HSTADD, (addr << 1) | SMB_READ);
Ring0.WriteSmbus(SMB_HSTCMD, command);
Ring0.WriteSmbus(SMB_HSTCNT, 0x0C);
transaction();
ushort temp = (ushort)(Ring0.ReadSmbus(SMB_HSTDAT0) + (Ring0.ReadSmbus(SMB_HSTDAT1) << 8));
return(temp);
}
public static ushort getWord(byte addr, byte command)
{
Ring0.WriteSmbus(SMBHSTADD, ((addr & 0x7f) << 1) | SMB_READ);
Ring0.WriteSmbus(SMBHSTCMD, command);
Ring0.WriteSmbus(SMBAUXCTL, Ring0.ReadSmbus(SMBAUXCTL) & (~SMBAUXCTL_CRC));
transaction(0x0C);
Ring0.WriteSmbus(SMBAUXCTL, Ring0.ReadSmbus(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B));
ushort wordData = (ushort)(Ring0.ReadSmbus(SMBHSTDAT0) + (Ring0.ReadSmbus(SMBHSTDAT1) << 8));
return(wordData);
}
private static int transaction(byte xact)
{
int result = checkPre();
if (result < 0)
{
return(result);
}
Ring0.WriteSmbus(SMBHSTCNT, Ring0.ReadSmbus(SMBHSTCNT) & ~SMBHSTCNT_INTREN);
Ring0.WriteSmbus(SMBHSTCNT, xact | SMBHSTCNT_START);
int status = waitIntr();
return(checkPost(status));
}
private static bool transaction()
{
byte temp = (byte)Ring0.ReadSmbus(SMB_HSTSTS);
if (temp != 0x00)
{
Ring0.WriteSmbus(SMB_HSTSTS, temp);
temp = (byte)Ring0.ReadSmbus(SMB_HSTSTS);
if (temp != 0x00)
{
return(false);
}
}
temp = (byte)Ring0.ReadSmbus(SMB_HSTCNT);
Ring0.WriteSmbus(SMB_HSTCNT, (byte)(temp | 0x040));
temp = 0;
int timeout = 0;
int MAX_TIMEOUT = 5000;
while ((++timeout < MAX_TIMEOUT) && temp <= 1)
{
temp = (byte)Ring0.ReadSmbus(SMB_HSTSTS);
}
if (timeout == MAX_TIMEOUT || (temp & 0x10) > 0 || (temp & 0x08) > 0 || (temp & 0x04) > 0)
{
return(false);
}
temp = (byte)Ring0.ReadSmbus(SMB_HSTSTS);
if (temp != 0x00)
{
Ring0.WriteSmbus(SMB_HSTSTS, temp);
}
return(true);
}
private static int checkPre()
{
ushort status = Ring0.ReadSmbus(SMBHSTSTS);
if ((status & SMBHSTSTS_HOST_BUSY) > 0)
{
return(-1);
}
status &= STATUS_FLAGS;
if (status > 0)
{
Ring0.WriteSmbus(SMBHSTSTS, status);
status = (ushort)(Ring0.ReadSmbus(SMBHSTSTS) & STATUS_FLAGS);
if (status > 0)
{
return(-1);
}
}
return(0);
}
private static int checkPost(int status)
{
int result = 0;
if (status < 0)
{
Ring0.WriteSmbus(SMBHSTCNT, Ring0.ReadSmbus(SMBHSTCNT) | SMBHSTCNT_KILL);
Thread.Sleep(1);
Ring0.WriteSmbus(SMBHSTCNT, Ring0.ReadSmbus(SMBHSTCNT) & (~SMBHSTCNT_KILL));
Ring0.WriteSmbus(SMBHSTSTS, STATUS_FLAGS);
return(-1);
}
if ((status & SMBHSTSTS_FAILED) > 0 || (status & SMBHSTSTS_DEV_ERR) > 0 || (status & SMBHSTSTS_BUS_ERR) > 0)
{
result = -1;
}
Ring0.WriteSmbus(SMBHSTSTS, status);
return(result);
}
