usart

[mostafaserial]

سلام
میکرو اتمگا 8 یه rx ,tx داره من نیاز به چند تا ارتباط سریال هستم
آیا امکان داره چند تا ورودی خروجی سریال برا میکرو توی بسکام تعریف کرد؟

[mostafaserial]

پاسخ : usart

کسی جواب ما رو نمیده؟

[cuttlass]

پاسخ : usart

اگه با بیسکام کار کنی این امکان رو بهت میده. اما با باود ریت پایین. مثلا 9600.

[mostafaserial]

پاسخ : usart

ممنون
شما مطمئن هستین؟ خودتون تست کردین ؟

[John Lock]

پاسخ : usart

دوست عزیز نگران نباش
شما به ازای هر دو پایع اضافه میتونی این کار رو انجام بدی
یعنی Rx و tx رو نرم افزاری تعریف کنی
این هم مثالش که d0 , d1 رو تعریف کرده

Example

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

'name : open.bas

'copyright : (c) 1995-2005, MCS Electronics

'purpose : demonstrates software UART

'micro : Mega48

'suited for demo : yes

'commercial addon needed : no

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



$regfile = "m48def.dat" ' specify the used micro

$crystal = 10000000 ' used crystal frequency

$baud = 19200 ' use baud rate

$hwstack = 32 ' default use 32 for the hardware stack

$swstack = 10 ' default use 10 for the SW stack

$framesize = 40 ' default use 40 for the frame space





Dim B As Byte



'Optional you can fine tune the calculated bit delay

'Why would you want to do that?

'Because chips that have an internal oscillator may not

'run at the speed specified. This depends on the voltage, temp etc.

'You can either change $CRYSTAL or you can use

'BAUD #1,9610



'In this example file we use the DT006 from www.simmstick.com

'This allows easy testing with the existing serial port

'The MAX232 is fitted for this example.

'Because we use the hardware UART pins we MAY NOT use the hardware UART

'The hardware UART is used when you use PRINT, INPUT or other related statements

'We will use the software UART.

Waitms 100



'open channel for output

Open "comd.1:19200,8,n,1" For Output As #1

Print #1 , "serial output"





'Now open a pin for input

Open "comd.0:19200,8,n,1" For Input As #2

'since there is no relation between the input and output pin

'there is NO ECHO while keys are typed

Print #1 , "Number"

'get a number

Input #2 , B

'print the number

Print #1 , B



'now loop until ESC is pressed

'With INKEY() we can check if there is data available

'To use it with the software UART you must provide the channel

Do

'store in byte

B = Inkey(#2)

'when the value > 0 we got something

If B > 0 Then

Print #1 , Chr(b) 'print the character

End If

Loop Until B = 27





Close #2

Close #1





'OPTIONAL you may use the HARDWARE UART

'The software UART will not work on the hardware UART pins

'so you must choose other pins

'use normal hardware UART for printing

'Print B





'When you dont want to use a level inverter such as the MAX-232

'You can specify ,INVERTED :

'Open "comd.0:300,8,n,1,inverted" For Input As #2

'Now the logic is inverted and there is no need for a level converter

'But the distance of the wires must be shorter with this

End

[mostafaserial]

پاسخ : usart

سلام

دمت گرم
ممنون :bye