Cannot send only 4 bits of data in SPI mode

[roboknight]

Cannot send only 4 bits of data in SPI mode

[GoogleCodeExporter]

Currently libmpsse only supports sending 8-bit bytes, although adding support 
for arbitrary bit-length transfers shouldn't be hard since the FTDI chips do 
support that. I'll put it on the todo list, but in the meantime yes, you will 
either need to modify libmpsse, or bitbang the data using libmpsse's bitbang 
mode.

Original comment by [email protected] on 11 Mar 2013 at 2:14

• Changed state: Accepted

[GoogleCodeExporter]

I've checked in some patches to the trunk that now include WriteBits and 
ReadBits functions. Initial testing seems OK, but I need to test them on a real 
device.

Original comment by [email protected] on 22 Mar 2013 at 7:07

• Changed state: Started

[GoogleCodeExporter]

The latest code from the trunk contains two new functions: ReadBits and 
WriteBits, which allow you to read and write from 1 to 8 bits at a time. They 
can be safely mixed with the Read and Write functions in your code. I have 
tested this at different bit widths in SPI0 mode reading and writing data MSB 
first.

Original comment by [email protected] on 25 Mar 2013 at 3:00

• Changed state: Fixed