Configuration Items - Freescale Semiconductor DSP56800E User Manual

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Configuration Items

This section summarizes the symbols used in macro definitions for the static PGA module

configuration by the driver initialization routine. PGA_x should be replaced by PGA_0 for the

PGA 0 module and PGA_1 for the PGA 1 module.. Configuration symbols are intended for the

application (project) specific configuration file appconfig.h.

PGA_x_CNTL0_INIT

PGA_x_CNTL1_INIT

PGA_x_CNTL2_INIT

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 PGA device modes or accesses the PGA register(s).

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

Table 5-362. PGA Configuration Items for appconfig.h

Table 5-363. PGA Driver Arguments - ioctl

Targeting 56F8xxx Platform

The initial value of the PGA

Control Register 0

The initial value of the PGA

Control Register 1

The initial value of the PGA

Control Register 2

The PGA module identifier. Use PGA0 or

FREESCALE SEMICONDUCTOR

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