III - Advanced Project » History » Version 28
Version 27 (COLIN, Tony, 12/14/2015 09:37 AM) → Version 28/59 (COLIN, Tony, 12/14/2015 09:44 AM)
h1. III - Advanced Project.
{{>toc}}
h2. 1. Adapting project to elementary task.
See [[Wiki#"3. Creation of a simple MPLAB X IDE project"|Tutorial page]] for project bases.
In this part, you will have to modify particular files of the previous Test/.
h3. 1.1 Integration of C Source files into task(s).
* *task_name.c* stating _void task_name (void) { ... }_.
Here you can either call the C main function in the task_name function or adapting your main file into one or several tasks (for simultaneity during process).
* *task_name.h* stating _extern void task_name (void);_ and other intern functions.
h3. 1.2 Definition of your task(s) to be called.
* *tasks.h* defining OSTCBP of all predifined tasks i.e. the way of specifying a pointer to a particular Salvo _Task Control Block_. More information is available on Salvo User Manual.
* *task_cmd.c* which is a tool provided by Test/ that allows to resume/stop your task(s).
!task_cmd.png!
* *main.c* i.e. the basic implementation to call your task(s). All statements are essential for Salvo and CSK to work.
!main.png!
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h2. 2. Integration of a Reed-Solomon encoder/decoder.
A highly convenient implementation of a Reed-Solomon code is available on "RS Code Website":http://rscode.sourceforge.net/ and will be integrated in the following.
h3. 2.1 Presentation of Reed-Solomon.
More information is available on attachment:rs.doc and attachment:config.doc.
h3. 2.2 Task Example.
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h2. 3. Displaying results.
h3. 3.1 In simulation.
p=. !CodingWin3.png!
*Message of 87 characters*
p=. !CodingWin2.png!
*Code of adding errors*
p=. !UART1.png!
*Checking Output UART Window*
p=. !CodingWin1.png!
*Displayed result*
h3. 3.2 On board.
|_.- |_.Char |_.Code ASCII |_.Hexadecimal |_. Binary |
|_.Codeword |=. 2 |=. 50 |=. 0x32 | 0b00110010 |
|_.Erroneous Codeword |=. 3 |=. 51 |=. 0x33 | 0b00110011 |
!LEDs_resized.png! !LEDs_error_resized.png! !LEDs_resized.png!
__________________ *a. Codeword : 0bXX110010* ________________________ *b. Erroneous codeword : 0bXX110011* ____________________ *c. Corrected codeword : 0bXX110010* ______________
---
h2. 4. Measurement of encoding/decoding time.
p=. !Clock1.png!
*1000 ticks per milliseconds*
p=. !Clock2.png!
*Time measurement of data encoding*
p=. !Clock3.png!
*Printing clock data*
p=. !Time_RS_resized.PNG!
*Chart of Reed Solomon time measurement*
{{>toc}}
h2. 1. Adapting project to elementary task.
See [[Wiki#"3. Creation of a simple MPLAB X IDE project"|Tutorial page]] for project bases.
In this part, you will have to modify particular files of the previous Test/.
h3. 1.1 Integration of C Source files into task(s).
* *task_name.c* stating _void task_name (void) { ... }_.
Here you can either call the C main function in the task_name function or adapting your main file into one or several tasks (for simultaneity during process).
* *task_name.h* stating _extern void task_name (void);_ and other intern functions.
h3. 1.2 Definition of your task(s) to be called.
* *tasks.h* defining OSTCBP of all predifined tasks i.e. the way of specifying a pointer to a particular Salvo _Task Control Block_. More information is available on Salvo User Manual.
* *task_cmd.c* which is a tool provided by Test/ that allows to resume/stop your task(s).
!task_cmd.png!
* *main.c* i.e. the basic implementation to call your task(s). All statements are essential for Salvo and CSK to work.
!main.png!
---
h2. 2. Integration of a Reed-Solomon encoder/decoder.
A highly convenient implementation of a Reed-Solomon code is available on "RS Code Website":http://rscode.sourceforge.net/ and will be integrated in the following.
h3. 2.1 Presentation of Reed-Solomon.
More information is available on attachment:rs.doc and attachment:config.doc.
h3. 2.2 Task Example.
---
h2. 3. Displaying results.
h3. 3.1 In simulation.
p=. !CodingWin3.png!
*Message of 87 characters*
p=. !CodingWin2.png!
*Code of adding errors*
p=. !UART1.png!
*Checking Output UART Window*
p=. !CodingWin1.png!
*Displayed result*
h3. 3.2 On board.
|_.- |_.Char |_.Code ASCII |_.Hexadecimal |_. Binary |
|_.Codeword |=. 2 |=. 50 |=. 0x32 | 0b00110010 |
|_.Erroneous Codeword |=. 3 |=. 51 |=. 0x33 | 0b00110011 |
!LEDs_resized.png! !LEDs_error_resized.png! !LEDs_resized.png!
__________________ *a. Codeword : 0bXX110010* ________________________ *b. Erroneous codeword : 0bXX110011* ____________________ *c. Corrected codeword : 0bXX110010* ______________
---
h2. 4. Measurement of encoding/decoding time.
p=. !Clock1.png!
*1000 ticks per milliseconds*
p=. !Clock2.png!
*Time measurement of data encoding*
p=. !Clock3.png!
*Printing clock data*
p=. !Time_RS_resized.PNG!
*Chart of Reed Solomon time measurement*