Post by thread:serial in

I'm trying to build a little serial backpack for an LCD screen (16x1) and am already using the external interupt for the busy flag. anyway I was wondering if anyone had any code for a serial in routine that used timing delay loops. I would like to keep my standard 4MHz crystal instead of that wacky 3.6838 or whatever that one is. Do the delays have to be accurate when coming into the pic? I have a serial out routine that uses these loops and is slightly off, but still works with my computer. thanks jon

Checkout http://www.mindspring.com/~tcoonan/lcd.html ______________________________ Reply Separator _________________________________ Subject: serial in Author: "MARK D NEWPORT" [SMTP:spam_OUTjmnewpTakeThisOuTWORLDNET.ATT.NET] at IMS Date: 9/30/98 11:50 PM I'm trying to build a little serial backpack for an LCD screen (16x1) and am already using the external interupt for the busy flag. anyway I was wondering if anyone had any code for a serial in routine that used timing delay loops. I would like to keep my standard 4MHz crystal instead of that wacky 3.6838 or whatever that one is. Do the delays have to be accurate when coming into the pic? I have a serial out routine that uses these loops and is slightly off, but still works with my computer. thanks jon

Have a look at the Microchip Application-Note 555 WBR Stefan Joe Little wrote: {Quote hidden}> > Checkout > http://www.mindspring.com/~tcoonan/lcd.html > > ______________________________ Reply Separator > _________________________________ > Subject: serial in > Author: "MARK D NEWPORT" [SMTP:.....jmnewpKILLspam@spam@WORLDNET.ATT.NET] at IMS > Date: 9/30/98 11:50 PM > > I'm trying to build a little serial backpack for an LCD screen (16x1) > and am already using the external interupt for the busy flag. anyway I > was wondering if anyone had any code for a serial in routine that used > timing delay loops. I would like to keep my standard 4MHz crystal > instead of that wacky 3.6838 or whatever that one is. Do the delays > have to be accurate when coming into the pic? I have a serial out > routine that uses these loops and is slightly off, but still works with > my computer. thanks > > jon

MARK D NEWPORT wrote: > > I'm trying to build a little serial backpack for an LCD screen (16x1) > and am already using the external interupt for the busy flag. anyway I > was wondering if anyone had any code for a serial in routine that used > timing delay loops. I would like to keep my standard 4MHz crystal > instead of that wacky 3.6838 or whatever that one is. Do the delays > have to be accurate when coming into the pic? I have a serial out > routine that uses these loops and is slightly off, but still works with > my computer. thanks What controller are you using? 3.6864MHz (if that's the number you were trying to think of) is not so wacky if you're using a PIC with an embedded USART. --Matt