NXP Semiconductors LPC84x, Руководство пользователя

Страница: 486 / 515

UM11029 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2017. All rights reserved.
User manual Rev. 1.0 — 16 June 2017 486 of 515
NXP Semiconductors
UM11029
Chapter 30: LPC84x ROM API integer divide routines
30.4 API description
The integer division routines perform arithmetic integer division operations and can be
called in the application code through simple API calls.
The following function prototypes are used:
typedef struct {
int quot; /*!< Quotient */
int rem; /*!< Remainder */
} IDIV_RETURN_T;
typedef struct {
unsigned quot; /*!< Quotient */
unsigned rem; /*!< Reminder */
} UIDIV_RETURN_T;
typedef struct {
int (*sidiv)(int numerator, int denominator); /*!< Signed integer division */
unsigned (*uidiv)(unsigned numerator, unsigned denominator); /*!< Unsigned
integer division */
IDIV_RETURN_T (*sidivmod)(int numerator, int denominator); /*!< Signed integer
division with remainder */
UIDIV_RETURN_T (*uidivmod)(unsigned numerator, unsigned denominator); /*!<
Unsigned integer division
with remainder */
} ROM_DIV_API_T;
ROM_DIV_API_T const *pROMDiv = LPC_ROM_API->divApiBase;
The ROM API table shown in Section 3.5.2 “ROM-based APIs” must be included in the
code.
30.4.1 DIV signed integer division
Table 471. Divide API calls
API call Description Reference
int(*sdiv) (int numerator, int denominator);
Signed integer division Table 472
unsigned (*udiv) (int numerator, int denominator);
Unsigned integer division Table 473
sdiv_t (*sdivmod) (int numerator, int denominator);
Signed integer division with remainder Table 474
udiv_t (*udivmod)(unsigned numerator, unsigned
denominator);
Unsigned integer division with remainder Table 475
Table 472. sidiv
Routine sidiv
Prototype
int(*sidiv) (int32_t numerator, int32_t denominator);