Matt wrote: > > If I can configure the device as per items 1,2 & 3 above using > libftdi then this should solve my problems. From looking at the code it's > not clear how I can do this, though. If anybody else out there could give > me a few pointers I'd very much appreciate it. >
To configure the MPSSE for I2C you basically have to: 1) Put the FTDI chip into MPSSE mode using ftdi_set_bitmode() 2) Configure the MPSSE clock frequency 3) Enable the 3-phase clock 4) Configure the DO/DI/SK pins as inputs/outputs 5) Ensure that when you send data you set the MPSSE_WRITE_NEG bit, and clear that bit when reading 6) After each byte you read/write send a single clock bit for the ACK/NACK There are a few other details, like ensuring your I2C start and stop conditions are properly met and I'm sure a few others that I'm forgetting at the moment. Libmpsse uses libftdi to do SPI and I2C, so you can look at that code for an example (http://libmpsse.googlecode.com). The I2C examples on FTDI's Web site are also good. -- View this message in context: http://libftdi.141977.n3.nabble.com/ft4232h-control-of-peripherals-tp3510224p3512632.html Sent from the libFTDI mailing list archive at Nabble.com. -- libftdi - see http://www.intra2net.com/en/developer/libftdi for details. To unsubscribe send a mail to [email protected]
