CTRDG_Read

# CTRDG_WriteAgbFlashSectorAsync

## C Specification

      #include <nitro/ctrdg.h>

      void CTRDG_WriteAgbFlashSectorAsync(u16 sec_num, u8* src, CTRDG_TASK_FUNC callback);

## Arguments

sec_num | The destination flash sector number.
src | Writes the source address.
callback | The callback function called when the data write process ends.

## Return Values

None.

## Description

This function asynchronously writes one sector (4 kbytes) of data beginning from the address given by `src` into the target sector number. `CTRDG_EraseAgbFlashSector` is called inside this routine and data is written after the sector is erased. You can find out how many bytes remain available while this routine is executing by accessing the global variable `flash_remainder`. You can find out whether the write process succeeded by accessing the result member of the `CTRDGTaskInfo` structure used as an argument to the callback function that returns after this routine is called. Returns zero if the write process succeeds. Returns non-zero if the write process fails or if the target sector number is out of range.

The access cycle setting does not need to be set beforehand because it is created inside the function. In addition, the `OS_InitTick` function must be called before this function because clock ticks are used by this function to measure timeouts.

Note: All interrupts are disabled inside this function and the cartridge bus is locked for a set period. In particular, when this function is called, do not use DMA that starts automatically during direct sound and V/H blank synchronization, display synchronization, cartridge request, etc.

Note that the AGB backup device cannot be accessed normally with version IS-NITRO-DEBUGGER 1.66 or earlier.

    /*  callback  function  */
    typedef u32 (*CTRDG_TASK_FUNC) (struct CTRDGiTaskInfo_tag *);

## See Also

`CTRDG_EraseAgbFlashSector, CTRDG_WriteAgbFlashSector, CTRDG_WriteAndVerifyAgbFlash, CTRDG_WriteAndVerifyAgbFlashAsync
`

## Revision History

05/25/2006 Added a description that the AGB backup device cannot be accessed normally with version IS-NITRO-DEBUGGER 1.66 or earlier.
04/07/2006 Initial version.

CONFIDENTIAL