3 status registers, 3 status registers -12, Table 7-5. firmware status registers -12 – Cirrus Logic CS4970x4 User Manual

Page 105: Ing bit 2 in dsp_msg_mask in, Table 7-5

7-12

DS810UM6

CS4953x4/CS4970x4 DSP Manager API Description
CS4953x4/CS4970x4 System Designer’s Guide

ucmd ef000007000m00dd # Set decoder (Required only when

# switching Multichannel Analog Input

# source.)

ucmd ef0000130000xxxx # Set DSP_CFG_MCLK_FACTOR

ucmd Ef00000000000001# Change to new configuration

Where dd= decoder uld id capable of PCM decoding, m= decoder mode of the uld specified by 'dd'. Set
m=0 and dd=00 to use the PCM decoder in OS.

You can combine input source change commands along with mode change/load command for any
applicable firmware module.

Example 3 Sample Commands to Change Audio Input Source and Change/Load Module

ucmd ef00000000000100 # Set Configuration Lock Mode

ucmd ef0000060000000w # Set Audio Input Source

ucmd ef0000130000xxxx # Set DSP_CFG_MCLK_FACTOR

ucmd ef000008000y00zz # Set MPM mode

ucmd Ef00000000000001# Change to new configuration

Where the audio input source is changed to “w” and simultaneously an MPM module is specified with uld
ID “zz” in mode “y” ( uld ID and the mode is defined per the flash.h file created when the flash image was
created).

See

Appendix C

for specific instructions on how to load and unload other decoder firmware modules.

Note: Current firmware does not support changing input source from HDMI/Multichannel source to

SPDIF source using DSP Manager API commands. Cirrus Logic recommends using SPDIF as
the default input source in the flash_image.xml file and toggling the DSP Reset to switch to
SPDIF source from HDMI/Multichannel source.

7.4.3 Status Registers

The following registers in

Table 7-5

describe various status return values for the firmware.

Table 7-5. Firmware Status Registers

Index Variable

Description

0x00020

DSP_STATUS

Read Only
Error code if system is halted for some reason
0x00000000

Normal Operation

0x00000001

Flash image verified

0x80000001

Flash image verification failed

0x00008002

Flash image update in progress

0x00000002

Update Flash Successful

0x80000002

Update Flash Failed

0x00000003

External Memory check successful

0x80000003

External Memory check failed

0x00000010 Concurrency Mode Change Succeeded (auto-switching)
0x80000010

Concurrency Mode Change Failed (auto-switching)

0x00008010

Concurrency Mode Change Best Fit

This manual is related to the following products:

CS4953x4