Autodocs
Devices:
audio.device
ADCMD_ALLOCATE
ADCMD_FINISH
ADCMD_FREE
ADCMD_LOCK
ADCMD_PERVOL
ADCMD_SETPREC
ADCMD_WAITCYCLE
AbortIO
BeginIO
CMD_CLEAR
CMD_FLUSH
CMD_READ
CMD_RESET
CMD_START
CMD_STOP
CMD_UPDATE
CMD_WRITE
CloseDevice
Expunge
OpenDevice
Include
GuruMeditation
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Docs » Autodocs » audio.device » CMD_RESET
CMD_RESET -- restore device to a known state
CMD_RESET is a standard command for multiple audio channels. For each
selected channel (io_Unit), if the allocation key (ioa_AllocKey) is
correct, CMD_RESET:
. clears the hardware audio registers and attach bits,
. sets the audio interrupt vector,
. cancels all pending I/O (CMD_FLUSH), and
. un-stops the channel if it is stopped (CMD_STOP),
Otherwise, CMD_RESET returns an error (ADIOERR_NOALLOCATION).
CMD_RESET is synchronous and only replies (mn_ReplyPort) if the quick
flag (IOF_QUICK) is clear. Do not use CMD_RESET in interrupt code at
interrupt level 5 or higher.
mn_ReplyPort- pointer to message port that receives I/O request
if the quick flag (IOF_QUICK) is clear
io_Device - pointer to device node, must be set by (or copied from
I/O block set by) OpenDevice function
io_Unit - bit map of channels to reset (bits 0 thru 3 correspond
to channels 0 thru 3)
io_Command - command number for CMD_RESET
io_Flags - flags, must be cleared if not used:
IOF_QUICK - (CLEAR) reply I/O request
ioa_AllocKey- allocation key, must be set by (or copied from I/O block
set by) OpenDevice function or ADCMD_ALLOCATE command
io_Unit - bit map of channels to successfully reset (bits 0 thru 3
correspond to channels 0 thru 3)
io_Error - error number:
0 - no error
ADIOERR_NOALLOCATION - allocation key (ioa_AllocKey)
does not match key for channel
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