targets/plc_debug.c
author Edouard Tisserant
Mon, 21 May 2012 16:40:57 +0200
changeset 740 cee825fbe9b3
parent 649 c48023b6f0ec
child 906 de452d65865c
permissions -rw-r--r--
fixed exception when launching discovery dialog without network
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/*
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 * DEBUGGER code
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 * 
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 * On "publish", when buffer is free, debugger stores arbitrary variables 
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 * content into, and mark this buffer as filled
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 * 
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 * 
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 * Buffer content is read asynchronously, (from non real time part), 
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 * and then buffer marked free again.
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 *  
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 * 
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 * */
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#include "iec_types_all.h"
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#include "POUS.h"
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/*for memcpy*/
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#include <string.h>
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#include <stdio.h>
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#define BUFFER_SIZE %(buffer_size)d
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/* Atomically accessed variable for buffer state */
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#define BUFFER_FREE 0
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#define BUFFER_BUSY 1
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static long buffer_state = BUFFER_FREE;
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/* The buffer itself */
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char debug_buffer[BUFFER_SIZE];
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/* Buffer's cursor*/
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static char* buffer_cursor = debug_buffer;
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static unsigned int retain_offset = 0;
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/***
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 * Declare programs 
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 **/
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%(programs_declarations)s
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/***
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 * Declare global variables from resources and conf 
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 **/
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%(extern_variables_declarations)s
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typedef void(*__for_each_variable_do_fp)(void*, __IEC_types_enum);
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void __for_each_variable_do(__for_each_variable_do_fp fp)
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{
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%(for_each_variable_do_code)s
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}
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__IEC_types_enum __find_variable(unsigned int varindex, void ** varp)
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{
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    switch(varindex){
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%(find_variable_case_code)s
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     default:
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      *varp = NULL;
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      return UNKNOWN_ENUM;
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    }
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}
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#define __Unpack_case_t(TYPENAME) \
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        case TYPENAME##_ENUM :\
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            *flags = ((__IEC_##TYPENAME##_t *)varp)->flags;\
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            forced_value_p = *real_value_p = &((__IEC_##TYPENAME##_t *)varp)->value;\
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            break;
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#define __Unpack_case_p(TYPENAME)\
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        case TYPENAME##_O_ENUM :\
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            *flags = __IEC_OUTPUT_FLAG;\
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        case TYPENAME##_P_ENUM :\
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            *flags |= ((__IEC_##TYPENAME##_p *)varp)->flags;\
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            *real_value_p = ((__IEC_##TYPENAME##_p *)varp)->value;\
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            forced_value_p = &((__IEC_##TYPENAME##_p *)varp)->fvalue;\
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            break;
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void* UnpackVar(void* varp, __IEC_types_enum vartype, void **real_value_p, char *flags)
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{
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    void *forced_value_p = NULL;
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    *flags = 0;
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    /* find data to copy*/
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    switch(vartype){
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        __ANY(__Unpack_case_t)
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        __ANY(__Unpack_case_p)
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    default:
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        break;
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    }
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    if (*flags & __IEC_FORCE_FLAG)
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        return forced_value_p;
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    return *real_value_p;
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}
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void Remind(unsigned int offset, unsigned int count, void * p);
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void RemindIterator(void* varp, __IEC_types_enum vartype)
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{
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    void *real_value_p = NULL;
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    char flags = 0;
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    UnpackVar(varp, vartype, &real_value_p, &flags);
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    if(flags & __IEC_RETAIN_FLAG){
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        USINT size = __get_type_enum_size(vartype);
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        /* compute next cursor positon*/
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        unsigned int next_retain_offset = retain_offset + size;
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        /* if buffer not full */
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        Remind(retain_offset, size, real_value_p);
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        /* increment cursor according size*/
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        retain_offset = next_retain_offset;
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    }
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}
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extern int CheckRetainBuffer(void);
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void __init_debug(void)
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{
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    /* init local static vars */
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    buffer_cursor = debug_buffer;
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    retain_offset = 0;
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    buffer_state = BUFFER_FREE;
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    /* Iterate over all variables to fill debug buffer */
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    if(CheckRetainBuffer())
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    	__for_each_variable_do(RemindIterator);
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    retain_offset = 0;
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}
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extern void InitiateDebugTransfer(void);
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extern unsigned long __tick;
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void __cleanup_debug(void)
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{
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    buffer_cursor = debug_buffer;
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    InitiateDebugTransfer();
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}
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void __retrieve_debug(void)
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{
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}
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void Retain(unsigned int offset, unsigned int count, void * p);
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inline void BufferIterator(void* varp, __IEC_types_enum vartype, int do_debug)
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{
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    void *real_value_p = NULL;
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    void *visible_value_p = NULL;
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   143
    char flags = 0;
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   144
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   145
    visible_value_p = UnpackVar(varp, vartype, &real_value_p, &flags);
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   146
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   147
    if(flags & ( __IEC_DEBUG_FLAG | __IEC_RETAIN_FLAG)){
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   148
        USINT size = __get_type_enum_size(vartype);
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   149
        if(flags & __IEC_DEBUG_FLAG){
605
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            /* copy visible variable to buffer */;
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   151
            if(do_debug){
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   152
                /* compute next cursor positon.
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   153
                   No need to check overflow, as BUFFER_SIZE
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   154
                   is computed large enough */
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   155
                char* next_cursor = buffer_cursor + size;
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   156
                /* copy data to the buffer */
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   157
                memcpy(buffer_cursor, visible_value_p, size);
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   158
                /* increment cursor according size*/
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   159
                buffer_cursor = next_cursor;
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   160
            }
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   161
            /* re-force real value of outputs (M and Q)*/
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   162
            if((flags & __IEC_FORCE_FLAG) && (flags & __IEC_OUTPUT_FLAG)){
605
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   163
                memcpy(real_value_p, visible_value_p, size);
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   164
            }
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   165
        }
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   166
        if(flags & __IEC_RETAIN_FLAG){
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   167
            /* compute next cursor positon*/
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   168
            unsigned int next_retain_offset = retain_offset + size;
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   169
            /* if buffer not full */
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   170
            Retain(retain_offset, size, real_value_p);
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   171
            /* increment cursor according size*/
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   172
            retain_offset = next_retain_offset;
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   173
        }
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   174
    }
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   175
}
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   176
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void DebugIterator(void* varp, __IEC_types_enum vartype){
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    BufferIterator(varp, vartype, 1);
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   179
}
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void RetainIterator(void* varp, __IEC_types_enum vartype){
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    BufferIterator(varp, vartype, 0);
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}
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   185
extern int TryEnterDebugSection(void);
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   186
extern long AtomicCompareExchange(long*, long, long);
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   187
extern void LeaveDebugSection(void);
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extern void ValidateRetainBuffer(void);
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extern void InValidateRetainBuffer(void);
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   190
423
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   191
void __publish_debug(void)
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{
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   193
    retain_offset = 0;
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   194
    InValidateRetainBuffer();
239
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   195
    /* Check there is no running debugger re-configuration */
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   196
    if(TryEnterDebugSection()){
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   197
        /* Lock buffer */
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   198
        long latest_state = AtomicCompareExchange(
112b4bc523b3 Fixed bad IPC choice for debugger/PLC/control thread collaboration
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   199
            &buffer_state,
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   200
            BUFFER_FREE,
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   201
            BUFFER_BUSY);
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diff changeset
   202
            
112b4bc523b3 Fixed bad IPC choice for debugger/PLC/control thread collaboration
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   203
        /* If buffer was free */
112b4bc523b3 Fixed bad IPC choice for debugger/PLC/control thread collaboration
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   204
        if(latest_state == BUFFER_FREE)
209
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   205
        {
239
112b4bc523b3 Fixed bad IPC choice for debugger/PLC/control thread collaboration
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   206
            /* Reset buffer cursor */
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   207
            buffer_cursor = debug_buffer;
450
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   208
            /* Iterate over all variables to fill debug buffer */
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   209
            __for_each_variable_do(DebugIterator);
239
112b4bc523b3 Fixed bad IPC choice for debugger/PLC/control thread collaboration
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diff changeset
   210
            
112b4bc523b3 Fixed bad IPC choice for debugger/PLC/control thread collaboration
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diff changeset
   211
            /* Leave debug section,
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   212
             * Trigger asynchronous transmission 
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   213
             * (returns immediately) */
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   214
            InitiateDebugTransfer(); /* size */
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   215
        }else{
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   216
            /* when not debugging, do only retain */
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   217
            __for_each_variable_do(RetainIterator);
209
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   218
        }
239
112b4bc523b3 Fixed bad IPC choice for debugger/PLC/control thread collaboration
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diff changeset
   219
        LeaveDebugSection();
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   220
    }else{
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   221
        /* when not debugging, do only retain */
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   222
        __for_each_variable_do(RetainIterator);
209
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diff changeset
   223
    }
580
9dd978e6537c More robust retain buffer validity management
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   224
    ValidateRetainBuffer();
209
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   225
}
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   226
450
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diff changeset
   227
#define __RegisterDebugVariable_case_t(TYPENAME) \
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   228
        case TYPENAME##_ENUM :\
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diff changeset
   229
            ((__IEC_##TYPENAME##_t *)varp)->flags |= flags;\
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diff changeset
   230
            if(force)\
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diff changeset
   231
             ((__IEC_##TYPENAME##_t *)varp)->value = *((TYPENAME *)force);\
458
dfc6164e4022 Debugger still doesn't work crash less...
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   232
            break;
450
18583d13f0fa Preliminary accessor support for debug
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diff changeset
   233
#define __RegisterDebugVariable_case_p(TYPENAME)\
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diff changeset
   234
        case TYPENAME##_P_ENUM :\
477
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diff changeset
   235
            ((__IEC_##TYPENAME##_p *)varp)->flags |= flags;\
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diff changeset
   236
            if(force)\
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diff changeset
   237
             ((__IEC_##TYPENAME##_p *)varp)->fvalue = *((TYPENAME *)force);\
511
518c30f2a507 Adding support for hard forcing located output
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diff changeset
   238
            break;\
518c30f2a507 Adding support for hard forcing located output
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diff changeset
   239
        case TYPENAME##_O_ENUM :\
518c30f2a507 Adding support for hard forcing located output
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diff changeset
   240
            ((__IEC_##TYPENAME##_p *)varp)->flags |= flags;\
582
bb5d0367bf32 Fix typo in plc_debug.c
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diff changeset
   241
            if(force){\
511
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diff changeset
   242
             ((__IEC_##TYPENAME##_p *)varp)->fvalue = *((TYPENAME *)force);\
518c30f2a507 Adding support for hard forcing located output
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diff changeset
   243
             *(((__IEC_##TYPENAME##_p *)varp)->value) = *((TYPENAME *)force);\
582
bb5d0367bf32 Fix typo in plc_debug.c
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   244
            }\
477
f66a092b6e74 Arbitrary variable forcing
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diff changeset
   245
            break;
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diff changeset
   246
void RegisterDebugVariable(int idx, void* force)
209
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   247
{
452
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diff changeset
   248
    void *varp = NULL;
477
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diff changeset
   249
    unsigned char flags = force ? __IEC_DEBUG_FLAG | __IEC_FORCE_FLAG : __IEC_DEBUG_FLAG;
458
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diff changeset
   250
    switch(__find_variable(idx, &varp)){
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   251
        __ANY(__RegisterDebugVariable_case_t)
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   252
        __ANY(__RegisterDebugVariable_case_p)
452
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diff changeset
   253
    default:
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diff changeset
   254
        break;
450
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diff changeset
   255
    }
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diff changeset
   256
}
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diff changeset
   257
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diff changeset
   258
#define __ResetDebugVariablesIterator_case_t(TYPENAME) \
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diff changeset
   259
        case TYPENAME##_ENUM :\
477
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diff changeset
   260
            ((__IEC_##TYPENAME##_t *)varp)->flags &= ~(__IEC_DEBUG_FLAG|__IEC_FORCE_FLAG);\
458
dfc6164e4022 Debugger still doesn't work crash less...
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diff changeset
   261
            break;
450
18583d13f0fa Preliminary accessor support for debug
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diff changeset
   262
18583d13f0fa Preliminary accessor support for debug
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diff changeset
   263
#define __ResetDebugVariablesIterator_case_p(TYPENAME)\
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parents: 423
diff changeset
   264
        case TYPENAME##_P_ENUM :\
582
bb5d0367bf32 Fix typo in plc_debug.c
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parents: 581
diff changeset
   265
        case TYPENAME##_O_ENUM :\
477
f66a092b6e74 Arbitrary variable forcing
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parents: 458
diff changeset
   266
            ((__IEC_##TYPENAME##_p *)varp)->flags &= ~(__IEC_DEBUG_FLAG|__IEC_FORCE_FLAG);\
458
dfc6164e4022 Debugger still doesn't work crash less...
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diff changeset
   267
            break;
450
18583d13f0fa Preliminary accessor support for debug
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diff changeset
   268
18583d13f0fa Preliminary accessor support for debug
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diff changeset
   269
void ResetDebugVariablesIterator(void* varp, __IEC_types_enum vartype)
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diff changeset
   270
{
18583d13f0fa Preliminary accessor support for debug
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diff changeset
   271
    /* force debug flag to 0*/
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diff changeset
   272
    switch(vartype){
611
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diff changeset
   273
        __ANY(__ResetDebugVariablesIterator_case_t)
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diff changeset
   274
        __ANY(__ResetDebugVariablesIterator_case_p)
452
2d0718a05cc7 Reflect changes in iec type definitions in matiec/lib
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parents: 450
diff changeset
   275
    default:
2d0718a05cc7 Reflect changes in iec type definitions in matiec/lib
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diff changeset
   276
        break;
209
08dc3d064cb5 Moved template C code to targets dir. Cleaned up some forgotten print.
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parents:
diff changeset
   277
    }
08dc3d064cb5 Moved template C code to targets dir. Cleaned up some forgotten print.
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diff changeset
   278
}
08dc3d064cb5 Moved template C code to targets dir. Cleaned up some forgotten print.
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   279
08dc3d064cb5 Moved template C code to targets dir. Cleaned up some forgotten print.
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void ResetDebugVariables(void)
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{
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    __for_each_variable_do(ResetDebugVariablesIterator);
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}
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void FreeDebugData(void)
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{
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    /* atomically mark buffer as free */
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    long latest_state;
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    latest_state = AtomicCompareExchange(
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        &buffer_state,
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        BUFFER_BUSY,
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        BUFFER_FREE);
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}
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int WaitDebugData(unsigned long *tick);
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/* Wait until debug data ready and return pointer to it */
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int GetDebugData(unsigned long *tick, unsigned long *size, void **buffer){
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    int wait_error = WaitDebugData(tick);
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    if(!wait_error){
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        *size = buffer_cursor - debug_buffer;
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        *buffer = debug_buffer;
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    }
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    return wait_error;
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}
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