Configuration Items - Freescale Semiconductor DSP56800E User Manual

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Public Data Structure(s):

Configuration Items

This section summarizes the symbols used in macro definitions for the static PIT_0, PIT_1, PIT_2

and PIT module configuration by the driver initialization routine. Configuration symbols are

intended for the application (project) specific configuration file appconfig.h.

PIT_x_CTRL_INIT

PIT_x_MOD_INIT

Note - PIT_x should be replaced by PIT_0 for the PIT 0 module, PIT_1 for the PIT 1 module and

PIT_2 for the PIT 2 module or by the PIT on MC56F800x. Note that some timers may not be

available on all devices.

API Specification

This section specifies the exact usage for each API function.

Function arguments for each routine are described as in, out, or inout.

1. in argument means that the parameter value is an input only to the function.

2. out argument means that the parameter value is an output only from the function.

3. inout argument means that a parameter value is an input to the function, but the same

parameter is also an output from the function.

Note: inout parameters are typically input pointer variables in which the caller passes the address

of a pre-allocated data structure to a function. The function stores its results within that data

structure. The actual value of the inout pointer parameter is not changed.

ioctl call(s):

The ioctl call is generally represented by one of the following forms:

UWord16 ioctl(const int *pModuleBase, void cmd, UWord16 param);

UWord16 ioctl(const int *pModuleBase, void cmd, void* pParam);

Description: The ioctl call "changes" the PIT device modes or accesses the PIT register(s). The

third ioctl parameter is either a value or a pointer, depending on the type of cmd.

Table 5-780. PIT Configuration Items for appconfig.h

Targeting 56F8xxx Platform

The initial value of the PIT Con-

trol Register

Initial value of the PIT Modulo

FREESCALE SEMICONDUCTOR

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