On Thu, Feb 11, 2016 at 12:28 PM, Andrew Adare <[email protected]> wrote:
> Thanks for the suggestions, but neither appear to work. The first produces a
> nonzero pointer,
>
> julia> p = Ptr{Int}[0]
> 1-element Array{Ptr{Int64},1}:
> Ptr{Int64} @0x0000000000000000
>
>
> julia> ccall((:sp_get_port_by_name, "libserialport"),Cint,(AbstractString,
> Ref{Ptr{Int}}),"/dev/cu.usbmodem1413",p)
> 0
>
>
> julia> p
> 1-element Array{Ptr{Int64},1}:
> Ptr{Int64} @0x00007fb4d8614f70
>
>
> but the allocated buffer appears to be gibberish:
>
> julia> bytestring(ccall((:sp_get_port_name, "libserialport"), Ptr{Cchar},
> (typeof(p),), p))
> "pOaĜ´\x7f"
>
>
> julia> bytestring(ccall((:sp_get_port_name, "libserialport"), Ptr{Cchar},
> (Ptr{Int},), p[]))
> "\x10!}\b\x01"
p = Ref{Ptr{Void}}()
ccall((:sp_get_port_by_name, "libserialport"),Cint,(Cstring,
Ref{Ptr{Void}}),"/dev/cu.usbmodem1413",p)
bytestring(ccall((:sp_get_port_name, "libserialport"), Ptr{Cchar},
(Ptr{Void},), p[]))
>
>
> And unfortunately the second approach just produces a null pointer:
>
> julia> immutable Port
> portpointer::Ptr{Void}
> end
>
>
> julia> p = Port(0)
> Port(Ptr{Void} @0x0000000000000000)
>
>
> julia> ccall((:sp_get_port_by_name, "libserialport"),Cint,(AbstractString,
> Ref{Port}),"/dev/cu.usbmodem1413",p)
> 0
>
>
> julia> p
> Port(Ptr{Void} @0x0000000000000000)
>
>
> So I'm still stumped...any further help is appreciated.
>
> Andrew
>
>
> On Thursday, February 11, 2016 at 9:24:07 AM UTC-7, Lutfullah Tomak wrote:
>>
>> p = Ptr{Int}[0]
>> ccall((:sp_get_port_by_name, "libserialport"),Cint,(AbstractString,
>> Ref{Ptr{Int}}),"/dev/cu.usbmodem1413",p)
>>
>> or
>>
>> immutable Port
>> portpointer::Ptr{Void}
>> end
>> p=Port(0)
>> ccall((:sp_get_port_by_name, "libserialport"),Cint,(AbstractString,
>> Ref{Port}),"/dev/cu.usbmodem1413",p)
