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AP0100CS Datasheet(PDF) 53 Page - ON Semiconductor |
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AP0100CS Datasheet(HTML) 53 Page - ON Semiconductor |
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53 / 73 page  AP0100CS/D Rev. 6, Pub. 1/16 EN 53 ©Semiconductor Components Industries, LLC,2016. AP0100CS HDR: Image Signal Processor (ISP) Multitasking 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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