AP0100CS datasheet(53/73 Pages) ONSEMI

53 / 73 page

AP0100CS/D Rev. 6, Pub. 1/16 EN

©Semiconductor Components Industries, LLC,2016.

AP0100CS HDR: Image Signal Processor (ISP)

Multitasking

The AP0100CS firmware is multitasking; therefore note that it is possible for an inter-

nally requested command to be in-progress when the Host issues a command. In these

circumstances, the Host command is immediately rejected with EBUSY. The Host

should reissue the command after a short interval.

Host Commands

Overview

The AP0100CS supports a number of functional modules or processing subsystems.

Each module or subsystem exposes commands to the host to control and configure its

operation.

Command Parameters

Command parameters are written to the Parameters Pool shared-variables by the host

prior to invoking the command. Similarly, any Command Response parameters are also

written back to the Parameters Pool by the firmware.

Result Status Codes

Table 19 shows the result status codes that are written by the Command Handler to the

Host Command register, in response to a command.

Note:

Any unrecognized host commands will be immediately rejected by the Command Handler, with

result status code ENOSYS.

Table 19:

Result Status Codes

Value

Mnemonic

Typical Interpretation – each command may re-interpret

0x00

ENOERR

No error – command was successful

0x01

ENOENT

No such entity

0x02

EINTR

Operation interrupted

0x03

EIO

I/O failure

0x04

E2BIG

Too big

0x05

EBADF

Bad file/handle

0x06

EAGAIN

Would-block, try again

0x07

ENOMEM

Not enough memory/resource

0x08

EACCES

Permission denied

0x09

EBUSY

Entity busy, cannot support operation

0x0A

EEXIST

Entity exists

0x0B

ENODEV

Device not found

0x0C

EINVAL

Invalid argument

0x0D

ENOSPC

no space/resource to complete

0x0E

ERANGE

parameter out-of-range

0x0F

ENOSYS

operation not supported

0x10

EALREADY

already requested/exists

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