Recent changes to Home

Home modified by Ingo

Ingo — Tue, 30 Jun 2020 10:55:40 -0000

--- v6
+++ v7
@@ -35,4 +35,7 @@
 * Static variables or functions

 # Usage
-This project is in a proof-of-concept phase. So it can't be easily used, yet, nor would I try to encourage non-experienced people to use it in this state. If you understand the Makefile and the code you can give it try, though.
+This project is in a proof-of-concept phase. So it can't be easily used, yet, nor would I try to encourage non-experienced people to use it in this state.
+
+If your code is proberly pre processed, you can quickly try it with the [web-version](https://forge.codesys.com/download/tol,c2iec,code.git//example.html) of the transpiler.
+

Home modified by Ingo

Ingo — Sat, 28 Mar 2020 21:10:08 -0000

--- v5
+++ v6
@@ -33,3 +33,6 @@
 * Function pointers
 * Pointer arithmetics
 * Static variables or functions
+
+# Usage
+This project is in a proof-of-concept phase. So it can't be easily used, yet, nor would I try to encourage non-experienced people to use it in this state. If you understand the Makefile and the code you can give it try, though.

Home modified by Ingo

Ingo — Sat, 28 Mar 2020 21:07:14 -0000

--- v4
+++ v5
@@ -1,3 +1,5 @@
+[[img src=Logo-c2iec.png]]
+
 # Why
 ST is a very robust and easy to understand language. A good fit for industrial applications. But on the internet you find by far more example algorithms, applications and libraries written in C or other languages. The mission of this project is to make the step from a working C example code to a working ST code as small as possible.

Home modified by Ingo

Ingo — Sat, 28 Mar 2020 20:53:04 -0000

--- v3
+++ v4
@@ -22,7 +22,7 @@
 named structs / unions | struct test | TYPE test: STRUCT
 unnamed structs / unions |     union ...; | flattened as members into the type in which they are embedded
 typedef | typedef struct ... t_struct; | TYPE t_struct: Id2036658550;
-arrays | char arr2[ 1 ][ 2 ]; | arr2: ARRAY[ 0..(1-1), 0..(2-1) ] OF BYTE;
+arrays | char arr2[1][2]; | arr2: ARRAY[0..(1-1),0..(2-1)] OF BYTE;

 # Limitations
 The following features will definitely not be supported by this transpiler, because of its design.

Home modified by Ingo

Ingo — Sat, 28 Mar 2020 20:52:22 -0000

--- v2
+++ v3
@@ -22,7 +22,7 @@
 named structs / unions | struct test | TYPE test: STRUCT
 unnamed structs / unions |     union ...; | flattened as members into the type in which they are embedded
 typedef | typedef struct ... t_struct; | TYPE t_struct: Id2036658550;
-arrays | char arr2[1][2]; | arr2: ARRAY[0..(1-1),0..(2-1)] OF BYTE;
+arrays | char arr2[ 1 ][ 2 ]; | arr2: ARRAY[ 0..(1-1), 0..(2-1) ] OF BYTE;

 # Limitations
 The following features will definitely not be supported by this transpiler, because of its design.

Home modified by Ingo

Ingo — Sat, 28 Mar 2020 20:51:35 -0000

--- v1
+++ v2
@@ -1,7 +1,33 @@
-Welcome to your wiki!
+# Why
+ST is a very robust and easy to understand language. A good fit for industrial applications. But on the internet you find by far more example algorithms, applications and libraries written in C or other languages. The mission of this project is to make the step from a working C example code to a working ST code as small as possible.

-This is the default page, edit it as you see fit. To add a new page simply reference it within brackets, e.g.: [SamplePage].
+# Technique
+The transpiler is built using the very old but famous and solid compiler builder tools [flex](https://github.com/westes/flex) and [yacc / bison](https://www.gnu.org/software/bison/). So the code transformation consists only of two steps:

-The wiki uses [Markdown](/tol/c2iec/home/markdown_syntax/) syntax.
+* flex: tokenize the ANSI C code
+* bison: parse and transform the tokens to ST code

-[[members limit=20]]
+As the transformations from the tokens to the resulting ST code is done in just one step, we have to live with a few limitations, which can't be transformed as the ST language doesn't support those language constructs.
+
+# Features
+The following features are currently tested, and should work therefore:
+
+feature | C        | ST
+------------ | ---------- | ------------------
+expressions | a = b * (c + d) * e; | a := b * ( c + d ) * e;
+lvalues | c++; | ((c:=c+1)-1);
+case | switch (value) | CASE value OF
+for | for (i=0; i < 5; i++) | WHILE i < 5;
+while | while (x < 10) | WHILE x < 10 DO
+named structs / unions | struct test | TYPE test: STRUCT
+unnamed structs / unions |     union ...; | flattened as members into the type in which they are embedded
+typedef | typedef struct ... t_struct; | TYPE t_struct: Id2036658550;
+arrays | char arr2[1][2]; | arr2: ARRAY[0..(1-1),0..(2-1)] OF BYTE;
+
+# Limitations
+The following features will definitely not be supported by this transpiler, because of its design.
+
+* Explicit type conversions of user defined data types (e.g. structs)
+* Function pointers
+* Pointer arithmetics
+* Static variables or functions

Home modified by Ingo

Ingo — Sat, 28 Mar 2020 19:58:05 -0000

Welcome to your wiki!

This is the default page, edit it as you see fit. To add a new page simply reference it within brackets, e.g.: [SamplePage].

The wiki uses Markdown syntax.

Project Members:

Ingo (admin)