Function specifications

Describes the function specifications of the CD communication interface.

(1) Format

In the figure, the reserved area is indicated by "-". Be sure to specify 0 for the reserved area.

(2) Initial values of parameters

Unless otherwise stated, the initial values of the parameters held by the CD block are equal to the default values specified by the host.

(3) Retention of CD status information (status and CD report)

The CD communication interface holds the status and CD report when the CD block command was issued. Information from regular responses is not retained. The initial value of the retained contents is all 0.
The functions that update the retention status / CD report are indicated by the following symbols.

However, nothing is updated at the time of error (when the error code is other than CDC_ERR_OK).

(4) Data transfer inside the function

Of the functions that acquire information, those that transfer data inside the function are referred to as Tget. The data transfer method is software transfer by the CPU.

<< Example >> Acquisition of TOC information (CDC_TgetToc)

These functions internally call the following functions:

• Waiting for data transfer to start (CDC_DataReady)
• End of data transfer (CDC_DataEnd)

(5) Command end flag (in interrupt cause register)

If there is a related command end flag, describe it in the item column called end flag.

<< Example >> End flag ESEL flag

These functions check the command end flag and clear 0 when the command is issued. If it cannot be issued, a CDC_ERR_CMDBUSY error will occur. In exceptional cases, the command end flag may only be cleared or checked. (Exclusive processing of command issuance)
When the processing corresponding to the issued command is completed, the command end flag is set to 1. However, note that it does not become 1 during REJECT and WAIT.
For details, refer to "3.2 Communication Method".

8.1 Function list

Table 8.1 shows a list of functions for the CD communication interface.

Table 8.1 List of functions of CD communication interface

function		Function name	number
Common to CD blocks			1.0
	Get current CD status information	CDC_GetCurStat	1.1
	Get last CD status information	CDC_GetLastStat	1.2
	Acquisition of regular CD status information	CDC_GetPeriStat	1.3 1.3
	Get hardware information	CDC_GetHwInfo	1.4
	Acquisition of TOC information	CDC_TgetToc	1.5
	Get session information	CDC_GetSes	1.6
	CD block initialization	CDC_CdInit	1.7 1.7
	Open tray	CDC_CdOpen	1.8 1.8
	Waiting for data transfer	CDC_DataReady	1.9
	End of data transfer	CDC_DataEnd	1.10

function		Function name	number
CD drive			2.0
	CD playback	CDC_CdPlay	2.1
	Seek playback position	CDC_CdSeek	2.2
	Scan playback	CDC_CdScan	2.3

function		Function name	number
Subcode			3.0
	Get subcode Q	CDC_TgetScdQch	3.1 3.1
	Acquisition of subcodes R to W	CDC_TgetScdRwch	3.2

function		Function name	number
CD-ROM device			4.0
	Setting the connection destination of the CD device	CDC_CdSetCon	4.1
	Obtaining the connection destination of the CD device	CDC_CdGetCon	4.2
	Get the buffer partition of the last read sector	CDC_CdGetLastBuf	4.3

function		Function name	number
selector			5.0
	Aperture frame address range setting	CDC_SetFiltRange	5.1
	Acquisition of aperture frame address range	CDC_GetFiltRange	5.2.
	Aperture subheader condition setting	CDC_SetFiltSubh	5.3 5.3
	Get aperture subheader condition	CDC_GetFiltSubh	5.4
	Aperture mode setting	CDC_SetFiltMode	5.5 5.5
	Acquiring aperture mode	CDC_GetFiltMode	5.6
	Setting the connection destination of the aperture	CDC_SetFiltCon	5.7
	Get the connection destination of the aperture	CDC_GetFiltCon	5.8
	Reset selector (aperture, compartment)	CDC_ResetSelector	5.9

function		Function name	number
Buffer information			6.0 6.0
	Get CD buffer size	CDC_GetBufSiz	6.1
	Get the number of sectors in the buffer partition	CDC_GetSctNum	6.2.
	Calculation of actual data size	CDC_CalActSiz	6.3
	Get the actual data size	CDC_GetActSiz	6.4
	Acquisition of sector information	CDC_GetSctInfo	6.5 6.5
	Performing a frame address search	CDC_ExeFadSearch	6.6
	Get frame address search results	CDC_GetFadSearch	6.7

function		Function name	number
Buffer input / output			7.0 7.0
	Sector length setting	CDC_SetSctLen	7.1
	Extract sector data	CDC_GetSctData	7.2
	Erase sector data	CDC_DelSctData	7.3
	Extraction and deletion of sector data	CDC_GetdelSctData	7.4.
	Writing sector data	CDC_PutSctData	7.5 7.5
	Copy sector data	CDC_CopySctData	7.6
	Moving sector data	CDC_MoveSctData	7.7
	Sector data copy / move error acquisition	CDC_GetCopyErr	7.8

function		Function name	number
CD block file system			8.0 8.0
	Move directory	CDC_ChgDir	8.1
	Retention of file information	CDC_ReadDir	8.2. 8.2
	Acquisition of retained file information range	CDC_GetFileScope	8.3
	Acquisition of retained file information	CDC_TgetFileInfo	8.4
	Read file	CDC_ReadFile	8.5
	Stop file access	CDC_AbortFile	8.6

function		Function name	number
Register access			9.0
	Get data transfer register pointer	CDC_GetDataPtr	9.1
	Acquisition of interrupt cause register value	CDC_GetHirqReq	9.2
	Clear interrupt factor register	CDC_ClrHirqReq	9.3
	Get interrupt mask register value	CDC_GetHirqMsk	9.4
	Interrupt mask register setting	CDC_SetHirqMsk	9.5
	Get MPEG register pointer	CDC_GetMpegPtr	9.6