Subject: libftdi - Python SWIG & unsigned char *
I've been working with the libftdi driver in Python recently and I've
run into a problem calling some of the functions from Python.
I stumbled across a mailing list thread between Flynn Marquardt and
which describes adding the following code to the ftdi.i swig file:
pointer_functions(unsigned int, uintp);
...to give us the ability to work with "unsigned int *" types.
Now, I wanted to use the ftdi_read_pins() function which requires us
to pass an "unsigned char *" type:
int ftdi_read_pins ( struct ftdi_context * ftdi,
unsigned char * pins
Do we need to do something similar to support this uchar * type in Python?
I tried adding the following and recompiling:
pointer_functions(unsigned char *, ucharp);
However, Python still gave me a Type error. I was only able to get the
ftdi_read_pin function working when I added and used the following:
pointer_functions(char *, charp);
Perhaps the following line in the ftdi.i file "%typemap(in) unsigned
char* = char*;" is what requires the use of char* instead of uchar* of
I appreciate any advice on the best course of action on this matter.
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
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