Post by thread:[PIC]: software USART

Hello everyone, Can someone/anyone pls point me in the direction of where to find a software implementation of USART (preferably in C). I have been searching the microchip website but haven't found anything yet. TIA Seyi ("`-''-/").___..--''"`-._ `6_ 6 ) `-. ( ).`-.__.`) (_Y_.)' ._ ) `._ `. ``-..-' Have a Grrrrreat day! _..`--'_..-_/ /--'_.' ,' (il),-'' (li),' ((!.-' -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

Find something here : http://www.geocities.com/SiliconValley/Network/3656/c2c/examples.html , http://www.winpenny.cwc.net/index.htm. You may use C2C compiler to use this software implementation. {Quote hidden}> -----Message d'origine----- > De: Oluseyi Odeinde [SMTP:.....seyiKILLspam@spam@OCEAN.CF.AC.UK] > Date: lundi 5 février 2001 13:37 > À: PICLISTKILLspamMITVMA.MIT.EDU > Objet: [PIC]: software USART > > Hello everyone, > > Can someone/anyone pls point me in the direction of where to find a > software implementation of USART (preferably in C). I have been > searching the microchip website but haven't found anything yet. > > TIA > Seyi > > ("`-''-/").___..--''"`-._ > `6_ 6 ) `-. ( ).`-.__.`) > (_Y_.)' ._ ) `._ `. ``-..-' Have a Grrrrreat day! > _..`--'_..-_/ /--'_.' ,' > (il),-'' (li),' ((!.-' > > -- > http://www.piclist.com hint: To leave the PICList > .....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu> > -- http://www.piclist.com hint: To leave the PICList EraseMEpiclist-unsubscribe-requestspam_OUTTakeThisOuTmitvma.mit.edu

part 1 279 bytes content-type:text/plain; (decoded 7bit) > Can someone/anyone pls point me in the direction of where to find a > software implementation of USART (preferably in C). I have been > searching the microchip website but haven't found anything yet. Attached is one in assembler. part 2 13832 bytes content-type:application/octet-stream; (decode) part 3 298 bytes ***************************************************************** Olin Lathrop, embedded systems consultant in Devens Massachusetts (978) 772-3129, olinspam_OUTembedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList @spam@piclist-unsubscribe-requestKILLspammitvma.mit.edu

See my recent reply to 'piclite?' for an example in HiTech's piclite C I also have an example done in C5X if you are interested. ----John ----- John P. Brown KILLspamJ.P.BrownKILLspambradford.ac.uk ---- \ --- Witty remark goes here --- / -------------------------------------------------- -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

On Mon, 5 Feb 2001 12:37:13 +0000, you wrote: >Hello everyone, > >Can someone/anyone pls point me in the direction of where to find a >software implementation of USART (preferably in C). I have been >searching the microchip website but haven't found anything yet. Do it in assembler - this sort of bit-bashing is easier in assembler than in C as C can't make good use of the carry functionality. -- http://www.piclist.com hint: To leave the PICList spamBeGonepiclist-unsubscribe-requestspamBeGonemitvma.mit.edu

Hi, Seyi! I suggest you to use a PIC MCU that really has a hardware UART: you can achieve best results. If you make a software full duplex UART ("bit banging" :) you waste a lot of CPU time and program memory... The most easy UART implementation in soft is half duplex. If you need full duplex, maybe you need to use "isochronous code" or a periodic interrupt using a timer. The use of periodc interrupt is a trouble because the inherent interrupt jitter in the PIC architecture (switch to Ubicom :-) The use of isochronous code is a pain in the ... , it is much simpler to use linear code and interrupts. But, if you persevere using full duplex soft UART, the code that I have posted in the piclist ("lcd232-e.zip", uploaded in 2000-08-11) that manages a 4x4 keyboard and LCD module with a 4MHz PIC16F84 maybe can help you... The communication is at 1200 baud full duplex, 8 bit,no parity. It uses isochronous code. Bye! :) Alejandro. At 12:37 05/02/01 +0000, you wrote: {Quote hidden}>Hello everyone, > >Can someone/anyone pls point me in the direction of where to find a >software implementation of USART (preferably in C). I have been >searching the microchip website but haven't found anything yet. > >TIA >Seyi > > ("`-''-/").___..--''"`-._ > `6_ 6 ) `-. ( ).`-.__.`) > (_Y_.)' ._ ) `._ `. ``-..-' Have a Grrrrreat day! > _..`--'_..-_/ /--'_.' ,' > (il),-'' (li),' ((!.-' > >-- >http://www.piclist.com hint: To leave the PICList >TakeThisOuTpiclist-unsubscribe-requestEraseMEspam_OUTmitvma.mit.edu > > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email RemoveMElistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body