Echelon Neuron C - Manual (Page 154)

134 Functions
The function enables or disables the lock (with a TRUE or FALSE argument,
respectively).
The EEPROM lock feature reduces the chances that a hardware failure or
application anomaly can lead to a corruption of checksummed onchip EEPROM
or offchip EEPROM or flash memory. The lock is automatically suspended while
a device is offline to allow network management operations to occur. The
application must release the lock prior to performing self-configuration.
Application EEPROM variables are not locked. For more information, including
a discussion of the drawbacks of using this feature, see #pragma eeprom_locked
in Chapter 2, Compiler Directives , on page 19.
Syntax
#include <control.h>
void set_eeprom_lock (boolean lock );
Example
#include <control.h>
when (reset)
{
// Lock the EEPROM to prevent accidental writes
set_eeprom_lock(TRUE);
}
...
void f(void)
{
// Unlock EEPROM for update
set_eeprom_lock(FALSE);
...//Update EEPROM
//Relock EEPROM
set_eeprom_lock (TRUE)
...
}
Signed 32-bit Arithmetic Support Functions
void s32_abs (const s32_type * arg1 , s32_type * arg2 );
void s32_add (const s32_type * arg1 , const s32_type * arg2 , s32_type * arg3 );
int s32_cmp (const s32_type * arg1 , const s32_type * arg2 );
void s32_dec (s32_type * arg1 );
void s32_div (const s32_type * arg1 , const s32_type * arg2 , s32_type * arg3 );
void s32_div2 (s32_type * arg1 );
void s32_eq (const s32_type * arg1 , const s32_type * arg2 );
void s32_from_ascii (const char * arg1 , s32_type * arg2 );
void s32_from_slong (signed long arg1 , s32_type * arg2 );
void s32_from_ulong (unsigned long arg1 , s32_type * arg2 );