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BASCOM AVR, help reference (2007).PDF

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<<< < Предыдущая 79 80 81 82 83 84 85 86 87 88 89 9091 / 16391 92 93 94 95 96 97 98 99 100 101 102 103 > Следующая >>>

	© MCS Electronics, 1995-2007

Mask	A file mask with a valid DOS filemask like *.TXT
	Use . to select all files.

The first function call needs a file mask. All other calls do not need the file mask. In fact when you want to get the next filename from the directory, you must not provide a mask after the first call.

Dir() returns an empty string when there are no more files or when no file name is found that matches the mask.

DISABLE

Action

Disable specified interrupt.

Syntax

DISABLE interrupt

Remarks

Interrupt	Description
INT0	External Interrupt 0

page -459-

	© MCS Electronics, 1995-2007

INT1	External Interrupt 1
OVF0,TIMER0, COUNTER0	TIMER0 overflow interrupt
OVF1,TIMER1,	TIMER1 overflow interrupt
COUNTER1
CAPTURE1, ICP1	INPUT CAPTURE TIMER1 interrupt
COMPARE1A,OC1A	TIMER1 OUTPUT COMPARE A interrupt
COMPARE1B,OC1B	TIMER1 OUTPUT COMPARE B interrupt
SPI	SPI interrupt
URXC	Serial RX complete interrupt
UDRE	Serial data register empty interrupt
UTXC	Serial TX complete interrupt
SERIAL	Disables URXC, UDRE and UTXC
ACI	Analog comparator interrupt
ADC	A/D converter interrupt

By default all interrupts are disabled.

To disable all interrupts specify INTERRUPTS.

To enable the enabling and disabling of individual interrupts use ENABLE INTERRUPTS.

The ENABLE INTERRUPTS serves as a master switch. It must be enabled/set in order for the individual interrupts to work.

The interrupts that are available will depend on the used microprocessor.

See also

ENABLE

Example

'-----------------------------------------------------------------------------
------------	: serint.bas
'name	: serint.bas
'copyright	: (c) 1995-2005, MCS Electronics
'purpose	: serial interrupt example for AVR
'micro	: 90S8535
'suited for demo	: yes
'commercial addon needed	: no

'-----------------------------------------------------------------------------

------------

$regfile = "8535def.dat"	' specify the used
micro	' used crystal
$crystal = 4000000	' used crystal
frequency	' use baud rate
$baud = 19200	' use baud rate
$hwstack = 32	' default use 32
for the hardware stack	' default use 10
$swstack = 10	' default use 10
for the SW stack	' default use 40
$framesize = 40	' default use 40
for the frame space
Const Cmaxchar = 20	'number of
characters
Dim B As Bit	'a flag for
	page -460-

© MCS Electronics, 1995-2007
signalling a received character	'byte counter
Dim Bc As Byte	'byte counter
Dim Buf As String * Cmaxchar	'serial buffer
Dim D As Byte

'Buf = Space(20)

'unremark line above for the MID() function in the ISR

'we need to fill the buffer with spaces otherwise it will contain garbage

Print "Start"
On Urxc Rec_isr	'define serial
receive ISR	'enable receive
Enable Urxc	'enable receive
isr
Enable Interrupts	'enable interrupts
to occur
Do	'we received
If B = 1 Then	'we received
something
Disable Serial	'print buffer
Print Buf	'print buffer
Print Bc	'print character
counter
'now check for buffer full	'buffer full
If Bc = Cmaxchar Then	'buffer full
Buf = ""	'clear
Bc = 0	'rest character
counter
End If
Reset B	'reset receive
flag
Enable Serial
End If
Loop
Rec_isr:
Print "*"	'does it fit into
If Bc < Cmaxchar Then	'does it fit into
the buffer?	'increase buffer
Incr Bc	'increase buffer
counter
If Udr = 13 Then	'return?
Buf = Buf + Chr(0)
Bc = Cmaxchar
Else	'add to buffer
Buf = Buf + Chr(udr)	'add to buffer
End If

' Mid(buf , Bc , 1) = Udr

'unremark line above and remark the line with Chr() to place

'the character into a certain position	'set flag
'B = 1
End If	'set flag
B = 1

page -461-

Return

DISKFREE

Action

Returns the free size of the Disk

Syntax

lFreeSize = DISKFREE()

Remarks

lFreeSize A Long Variable, which is assigned with the available Bytes on the Disk in Bytes

This functions returns the free size of the disk in Bytes.

DISKSIZE

Action

Returns the size of the Disk

Syntax

page -462-

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Calls	_Dir ; with filemask	_Dir0 ; without filemask
Input	X : points to the string with the	Z : points to the target variable
	mask
Output

Calls	_GetDiskFreeSize
Input	none
Output	r16-r19: Long-Value of free Bytes