Echelon Neuron C Instrukcja Użytkownika Pobierz pdf (Strona 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

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

);

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