Api Specification - Freescale Semiconductor DSP56800E User Manual

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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" PWM device modes or accesses the PWM register(s).

pParam, param

Items Separator Convention:

only one of the specified items is allowed

combination of items is allowed ( item1 | item2 | item3 )

intersection of items is allowed ( item1 & item2 & item3 )

Table 5-452. PWM Driver Arguments - ioctl

Table 5-453. ioctl commands

Targeting 56F8xxx Platform

PWM module identifier. Use PWM on

or PWM_A and PWM_B

on MC56F83xx.

Commands found in pwm.h which are

used to modify the PWM module status

and control registers. See Table 5-453.

Used to pass the relevant data to ioctl

function call.

FREESCALE SEMICONDUCTOR

Initializes PWM module by

data from configuration file

(appconfig.h).

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