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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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#define BUFFER_SIZE 1024
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#define MAX_SUBSCRIBTION %(subscription_table_count)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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typedef struct{
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void* ptrvalue;
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__IEC_types_enum type;
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}struct_plcvar;
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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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static int subscription_table[MAX_SUBSCRIBTION];
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static int* latest_subscription = subscription_table;
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static int* subscription_cursor = subscription_table;
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struct_plcvar variable_table[%(variables_pointer_type_table_count)d];
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void __init_debug()
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{
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%(variables_pointer_type_table_initializer)s
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};
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void __cleanup_debug()
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{
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}
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void __retrieve_debug()
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{
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}
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void __publish_debug()
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{
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/* Lock buffer */
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long latest_state = AtomicCompareExchange(
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&buffer_state,
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BUFFER_FREE,
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BUFFER_BUSY);
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/* If buffer was free */
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if(latest_state == BUFFER_FREE)
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{
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int* subscription;
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/* Reset buffer cursor */
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buffer_cursor = debug_buffer;
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/* iterate over subscriptions */
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for(subscription=subscription_table;
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subscription < latest_subscription;
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subscription++)
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{
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/* get variable descriptor */
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struct_plcvar* my_var = &variable_table[*subscription];
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char* next_cursor;
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/* get variable size*/
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USINT size = __get_type_enum_size(my_var->type);
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/* compute next cursor positon*/
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next_cursor = buffer_cursor + size;
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/* if buffer not full */
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if(next_cursor < debug_buffer + BUFFER_SIZE)
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{
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/* copy data to the buffer */
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memcpy(buffer_cursor, my_var->ptrvalue, size);
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/* increment cursor according size*/
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buffer_cursor = next_cursor;
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}else{
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/*TODO : signal overflow*/
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}
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}
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/* Reset buffer cursor again (for IterDebugData)*/
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buffer_cursor = debug_buffer;
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subscription_cursor = subscription_table;
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/* Trigger asynchronous transmission (returns immediately) */
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InitiateDebugTransfer(); /* size */
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}
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}
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void RegisterDebugVariable(int idx)
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{
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/*If subscription table not full */
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if(latest_subscription - subscription_table < MAX_SUBSCRIBTION)
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{
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*(latest_subscription++) = idx;
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/* TODO pre-calc buffer size and signal overflow*/
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}else{
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/*TODO : signal subscription overflow*/
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}
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}
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void ResetDebugVariables(void)
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{
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latest_subscription = subscription_table;
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}
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void FreeDebugData()
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{
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/* atomically mark buffer as free */
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long 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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void* IterDebugData(int* idx, const char **type_name)
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{
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if(subscription_cursor < latest_subscription){
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*idx = *subscription_cursor;
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struct_plcvar* my_var = &variable_table[*subscription_cursor++];
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*type_name = __get_type_enum_name(my_var->type);
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return my_var->ptrvalue;
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}
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return NULL;
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}
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