There is a function in the api called 

ftdi_set_baudrate(ftdi_context,baudrate)

I am not sure if it is as simple as calling this function with a 3000000 for 
3MHz or if there is some other calculation involved.

Does ftdi_set_baudrate(ftdi_context,3000000) == 3MHz MPSSE SPI mode?

I am trying to sample a 1.5 MHz signal on the "Data Input (DI)" pin of both 
channels(A & B).

Thanks
Siva

From: [email protected]
To: [email protected]
Subject: MPSSE baudrate
Date: Thu, 31 Dec 2009 06:50:05 -0500









Hello,

I am a beginner to using FTDI chips and want to use FT4232H for sampling a 1.5 
MHz line. I am hoping that if I could run MPSSE SPI at a baud rate of > 3Mhz or 
6 Mhz, will give me a reliable sample.

I am struggling to understand how the baud rate interacts with MPSSE. I have 
been through the examples in the libftdi source and the mailing list, but am 
not having much luck. Any documentation that I can find on baudrate seems to be 
correlated with BitBang mode or UART mode.

Can anyone please guide me to where I can find more information on how the 
baudrate interacts with MPSSE SPI?

Thanks
Siva



                                          
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