targets/plc_main_head.c
author Edouard Tisserant
Tue, 23 Oct 2018 16:13:34 +0200
changeset 2322 7ce4e5cf6339
parent 1981 d0718654d9b0
child 2503 6ffeffb6d635
permissions -rw-r--r--
Added runtime/spawn_subprocess.py. Force use posix spawn instead of fork, with API similar to subprocess. Using fork in runtime is incompatible with Xenomai, because memory is locked and this can lead to out of memory error.
/**
 * Head of code common to all C targets
 **/

#include "beremiz.h"
#include <string.h>
/*
 * Prototypes of functions provided by generated C softPLC
 **/
void config_run__(unsigned long tick);
void config_init__(void);

/*
 * Prototypes of functions provided by generated target C code
 * */
long long AtomicCompareExchange64(long long*, long long, long long);
void __init_debug(void);
void __cleanup_debug(void);
/*void __retrieve_debug(void);*/
void __publish_debug(void);

/*
 *  Variables used by generated C softPLC and plugins
 **/
IEC_TIME __CURRENT_TIME;
IEC_BOOL __DEBUG = 0;
unsigned long __tick = 0;
char *PLC_ID = NULL;

/*
 *  Variable generated by C softPLC and plugins
 **/
extern unsigned long greatest_tick_count__;

/* Help to quit cleanly when init fail at a certain level */
static int init_level = 0;

/* Prototype for Logging to help spotting errors at init */
int LogMessage(uint8_t level, char* buf, uint32_t size);

/*
 * Prototypes of functions exported by plugins
 **/
%(calls_prototypes)s

/*
 * Retrieve input variables, run PLC and publish output variables
 **/
void __run(void)
{
    __tick++;
    if (greatest_tick_count__)
        __tick %%= greatest_tick_count__;

    %(retrieve_calls)s

    /*__retrieve_debug();*/

    config_run__(__tick);

    __publish_debug();

    %(publish_calls)s

}

/*
 * Initialize variables according to PLC's default values,
 * and then init plugins with that values
 **/
int __init(int argc,char **argv)
{
    int res = 0;
    init_level = 0;
    
    /* Effective tick time with 1ms default value */
    if(!common_ticktime__)
        common_ticktime__ = 1000000;

    config_init__();
    __init_debug();
    %(init_calls)s
    return res;
}
/*
 * Calls plugin cleanup proc.
 **/
void __cleanup(void)
{
    %(cleanup_calls)s
    __cleanup_debug();
}

void PLC_GetTime(IEC_TIME *CURRENT_TIME);
void PLC_SetTimer(unsigned long long next, unsigned long long period);