Public bug reported:
Regarding the Python bindings for libftdi, binary package python-ftdi 0.20-1 on
precise, built from source package libftdi.
I is not possible to use the Python bindings for function ftdi_read_data().
Here is the C function description from the upstream documentation [1]:
int ftdi_read_data (
struct ftdi_context * ftdi,
unsigned char * buf,
int size)
Parameters:
ftdi pointer to ftdi_context
buf Buffer to store data in
size Size of the buffer
Return values:
-666: USB device unavailable
<0: error code from libusb_bulk_transfer()
0: no data was available
>0: number of bytes read
All my attempts to use the Python binding of this function failed.
Example:
ReadData = ctypes.c_char * readCount
readData = ReadData()
actualReadCount = ftdi.ftdi_read_data(ftdiContext,
ctypes.byref(readData), readCount)
Gives exception:
I am quite sure that there is no way to use it correctly.
The usage examples in the source package leave out the read function.
[1] http://www.intra2net.com/en/developer/libftdi/documentation/
** Affects: libftdi (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1155973
Title:
Python bindings for ftdi_read_data() broken
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