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Hi All,

Another huh?
I have noticed when I initialize EUSART 1 it transmits 8 bytes!!!
I am using the ICD 2 to step thru the code below:
Executing the 10th code line immediately causes the transmitter to send the
following 8 bytes:
00 FF FA 2C 6A 04 FF F0
It also does this if I program the chip and run it without the ICD.

Init_USART1	MOVLW	9			; For the Baud Rate 921.6
Kbaud.
Set_Baud_1	MOVWF	SPBRG1		; Set the Baud Rate Generator.
		BCF	TXSTA1, TX9		; <6> Select 8 bit
transmission.
		BSF	TXSTA1, TXEN	; <5> Enable the transmitter.
		BCF	TXSTA1, SYNC	; <4> Select Asynchronous mode.
		BSF	TXSTA1, BRGH	; <2> Select High Speed BRGH.
;
		BSF	BAUDCON1, BRG16	; <3> Set 16 bit Baud Rate Gen.
mode.
		BCF	BAUDCON1, WUE  	; <1> Disable Wake Up.
		BCF	BAUDCON1, ABDEN	; <0> Disable Auto-Baud.
;
		BSF	RCSTA1, SPEN	; <7> Serial Port enabled.   <--- It
sends the 8 bytes...
		BCF	RCSTA1, RX9		; <6> Select 8 bit
reception.
		BSF	RCSTA1, CREN	; <4> Enable receive mode.

The curious thing is the chip has 2 EUSARTS and the second one does not do
this, with the identical code.

Tom

  *
  |  __O    Thomas C. Sefranek  WA1RHP@ARRL.NET
  |_-\<,_   Amateur Radio Operator: WA1RHP
  (*)/ (*)  Bicycle mobile on 145.41MHz PL74.4
 
ARRL Instructor, Technical Specialist, VE Contact.
http://hamradio.cmcorp.com/inventory/Inventory.html
http://www.harvardrepeater.org

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12:32 PM
 


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