12. Function details

  format  Sint32 MPG_Init (Sint32 dscn)
 Input  dscn: Display scanning method
 Output  None
 Function value  Error code
 Function  Initializes the MPEG system. MPEG audio is always replayed when this initialization is performed.
  will be live.
  When using the MPEG library, this function must be called only once at the beginning.
 Not . 

 
 (1) Display scanning method
 
 MPG_DSCN_NITL: NTSC non-interlace mode
 MPG_DSCN_ITL: NTSC interlace mode
 MPG_DSCN_PLNITL: PAL non-interlace mode
 MPG_DSCN_PLITL: PAL interlace mode 
 
 
 

 Remarks  (a) Execute the following procedure within this function and return an error code. 

Use the

	Procedure	Error code
1	Perform a soft reset of the CD block (CDC_CdInit function).	If an error occurs, return MPG_ERR_CDINIT
2	CDC_GetHwInfo function to check if the MPEG cartridge is installed.	If not installed, return MPG_ERR_NOMC.
3	If MPEG cannot be used, MPEG check (SYS_CHKMPEG) of the service routine in BOOT ROM is executed.	If the check fails, return MPG_ERR_MPNG.
4	MPEG decoder initialization (CDC_MpInit function) is executed.	If an error occurs, return MPG_ERR_MPINIT.
5	MPEG interrupt mask setting (CDC_MpSetIntMsk function) is executed, and picture start detection and sequence end detection interrupts are enabled.	If an error occurs, return MPG_ERR_NG.
6	If a constant for PAL is specified for the display scan method, CDC_MpSetWinDofs function is used to set the display window offset to (150, Set to 45).	If an error occurs, return MPG_ERR_NG.

(b) Call the GFS_Init function and STM_Init function after executing this function.