| Author |
Message |
liam.zbasic
Joined: 25 Mar 2008
Location: California
|
|
Posted: 06 July 2008, 0:46 AM Post subject: ANSI C Compatibility |
|
|
Is it possible to combine ANSI C code with Zbasic? The intent is to take advantage of Matlab autocode for complex control systems. Comments appreciated.
P.
|
|
| Back to top |
|
 |
dkinzer
Site Admin
Joined: 03 Sep 2005
Location: Portland, OR
|
|
Posted: 06 July 2008, 1:02 AM Post subject: Re: ANSI C Compatibility |
|
|
| liam.zbasic wrote: | | Is it possible to combine ANSI C code with Zbasic? |
Yes but only with native mode devices, e.g. ZX-24n.
You can use inline C code within ZBasic source code, separate C source modules, compiled object modules and/or object libraries.
|
|
| Back to top |
|
|
liam.zbasic
Joined: 25 Mar 2008
Location: California
|
|
Posted: 06 July 2008, 2:19 AM Post subject: |
|
|
Excellent. Is all the capability you outlined administered by the Zbasic IDE? Do you have a simple "hello world" example using separate C source modules? Thank you for your quick response.
P.
|
|
| Back to top |
|
|
dkinzer
Site Admin
Joined: 03 Sep 2005
Location: Portland, OR
|
|
Posted: 06 July 2008, 3:14 AM Post subject: |
|
|
| liam.zbasic wrote: | | Do you have a simple "hello world" example using separate C source modules? |
The attached .zip file contains a simple project containing one ZBasic module (c_source.bas) and a C source module (factorial.c). It is somewhat contrived since the functionality implemented in C could just as easily have been done in ZBasic but it illustrates the technique nonetheless.
The content of c_source.bas is reproduced below. The key to making a call to a function implemented in C is to prepare a Declare statement that informs the ZBasic compiler as to the parameters and type of the C function. The Alias clause tells the compiler the actual name of the C function being called. The declared name (used in ZBasic code) needn't be the same. For more information, see the ZBasic Reference manual section Defining and Using External Subroutines, Functions and Variables
| Code: | Declare Function Factorial(ByVal val as UnsignedInteger) as UnsignedInteger Alias "factorial"
Sub Main()
Dim val as UnsignedInteger
val = 5
Debug.Print val; "! is "; Factorial(val)
End Sub |
The content of the module factorial.c (reproduced below) is a straightforward recursive implementation of the factorial function.
| Code: | unsigned
factorial(unsigned val)
{
return((val <= 1) ? 1 : factorial(val - 1) * val);
} |
When working with external C modules, object modules or object libraries, it may be a good idea to add the compiler option --verbose to the project file (before the module names). With that option present, the output from the backend compiler and linker will be displayed in the ZBasic IDE output window so you'll be able to see error messages that are issued. Without that, the ZBasic compiler will simply report that an error occurred during the build without any clues as to what the error might be.
This technique is recommended for more experienced programmers and, particularly, those with experience programming in C.
| Description: |
| ZBasic example using a C source module. |
|
Download |
| Filename: |
c_source.zip |
| Filesize: |
562 Bytes |
| Downloaded: |
271 Time(s) |
|
|
| Back to top |
|
|
|
