Maxim Integrated 71M6521BE Energy Meter IC Family Software User Manual

Page 38

71M652X Software User’s Guide

Revision 1.7

TERIDIAN Proprietary

38 of 138

General data type definitions:

typedef unsigned char

uint8_t;

typedef unsigned short

uint16_t;

typedef unsigned long

uint32_t;

typedef signed char

int8_t;

typedef signed short

int16_t;

typedef signed long

int32_t

Type definitions for internal data, lower 128 bytes, addressed directly:

typedef unsigned char data

uint8d_t;

typedef unsigned short data

uint16d_t;

typedef unsigned long data

uint32d_t;

typedef signed char data

int8d_t;

typedef signed short data

int16d_t;

typedef signed long data

int32d_t;

This is the fastest available memory (except registers), not battery-backed-up, but competes with stack, registers,
booleans, and idata.

Note: For portability, see uint_fast8_t and its sisters, which are POSIX standard.

Type definitions for internal data, 16 bytes (0x20 to0x2F), addressed directly, and bit addressable:

typedef unsigned char bdata

uint8b_t;

typedef unsigned short bdata

uint16b_t;

typedef unsigned long bdata

uint32b_t;

typedef signed char bdata

int8b_t;

typedef signed short bdata

int16b_t;

typedef signed long bdata

int32b_t;

This is the fastest available memory, but it is not battery-backed-up. It competes with stack, registers, bools, data, and
idata. The space is valuable for boolean globals and should not be wasted.

Booleans are not a normal part of stdint.h, but fairly portable. When using the Keil compiler, the Booleans are stored in
the address range 0x20 to 0x2F. Keil functions return bools in the carry bit, which makes code that's fast and small.

typedef bit bool

;

#define TRUE 1

#define FALSE 0

#define ON 1

#define OFF 0

This manual is related to the following products:

71M6521FE Energy Meter IC Family Software 71M6521DE Energy Meter IC Family Software