Hi David,
sorry, I am not too familiar with the driver operation in detail, but I guess
this general hint could be useful:
The device information, which you like to receive, cannot be generated by the
driver. Instead the manufacturer need to provide those in the devices
non-volatile memory.
A driver acting under those conditions needs always be aware of this fact and
needs to provide tests for an „empty“ status.
Reaction in case of emptiness could be generation of some standard value like
„<undefined>“ or an error status.
Without such care, you would receive garbage as shown.
In this case your application can do, what the driver missed.
Empty condition would likely be defined as returning byte values outside of
[0-9a-zA-Z_] in regular expression syntax.
Best regards,
Harald
> Am 17.07.2024 um 06:54 schrieb David Walton <dwalton...@gmail.com>:
>
> Test code:
>
> #include <ftdi.hpp>
> #include <string>
> #include <fmt/core.h>
>
> int main(int argc, char **argv)
> {
> int vid = 0x0403, pid = 0x6010;
>
> Ftdi::Context ftdi_context;
> std::string ftdi_description("Lattice FTUSB Interface Cable");
> if (ftdi_context.open(vid, pid, ftdi_description) != 0)
> {
> fmt::print("Failed to open \"{:s}\" \"{:s}\"\n", ftdi_description,
> ftdi_context.error_string());
> }
> else
> {
> auto vendor = ftdi_context.vendor();
> auto description = ftdi_context.description();
> auto serial = ftdi_context.serial();
> fmt::print("Vendor \"{:s}\", Description \"{:s}\", Serial
> \"{:s}\"\n", vendor, description, serial);
> }
>
> return EXIT_SUCCESS;
> }
>
> I was hoping that my test code would return the following:
> Vendor "Lattice", Description "Lattice FTUSB Interface Cable", Serial ""
>
> Instead I get the following:
> Vendor "�U���", Description "Lattice FTUSB Interface Cable", Serial "@"
>
> Is there something else that needs to be done for ftdi_context.vendor() and
> ftdi_context.serial() to be populated?
>
>
>
> libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
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