public static int PollModuleForResponse(int addr, ref byte[] bfrRecv)
{
var m = new I2CManager();
bfrRecv[0] = 0xCC;
int iCnt = 0;
int fd = GetFDFromAddress(addr);
Console.WriteLine(string.Format("PollModuleForResponse : File descriptor : {0}", fd));
while ((bfrRecv[0] == 0xCC) && iCnt < 80) // 80x50ms = 4s timeout
{
int retVal = m.I2CReadBlock(fd, ref bfrRecv);
//int retVal = m.I2CReadBlockAddr(addr, ref bfrRecv);
PrintBuffer(bfrRecv, "PollModuleForResponse");
if (bfrRecv[0] == 0xCC)
{
// No data, waiting 50ms to retry.
System.Threading.Thread.Sleep(50);
}
iCnt++;
}
if (bfrRecv[0] == 0xCC)
{
return(0);
}
else
{
return(-1);
}
}
/// <summary>
/// Polls a module for response.
/// </summary>
/// <param name="addr">Address of the module.</param>
/// <param name="bfrRecv">Buffer with received data after method returns.</param>
/// <returns>Status of communication. True if response is valid, false otherwise.</returns>
protected virtual bool PollModuleForResponse(int addr, ref byte[] bfrRecv)
{
var m = new I2CManager();
bfrRecv[0] = 0xCC;
int iCnt = 0;
System.Threading.Thread.Sleep(10); // Needed on RPi3 because it was too fast
int fd = GetFDFromAddress(addr);
while ((bfrRecv[0] == 0xCC) && iCnt < 80) // 80x50ms = 4s timeout
{
int retVal = m.I2CReadBlock(fd, ref bfrRecv);
if (bfrRecv[0] == 0xCC)
{
// No data, waiting 50ms to retry.
System.Threading.Thread.Sleep(50);
}
iCnt++;
}
LogBuffer(bfrRecv, "I2C data recv");
return(bfrRecv[0] != 0xCC);
}