Post by thread:[SX]: What do I need?

Believe it or not I am thinking of developing a project on an SX48. I have a need for multiple UARTs at high baud rates, and you just can't do that on a PIC. The only dual UART PICs are high pin count monsters, and that isn't very appealing either. PICs, of course, don't have the speed to do it by bit-banging, but the SX certainly does. So, just what do I need to: 1: Do in-circuit programming 2: Do in-circuit debugging 3: Develop in assembly language Finally, are there any assembler choices that would allow me to use mChip style assembly mnemonics to develop for the SX? Bob Ammerman RAm Systems -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

Have you looked at ATMEL as a lower cost and higher speed alternative? On 2 Dec 2002 at 11:50, Bob Ammerman wrote: {Quote hidden}> Believe it or not I am thinking of developing a project on an SX48. I have a > need for multiple UARTs at high baud rates, and you just can't do that on a > PIC. The only dual UART PICs are high pin count monsters, and that isn't > very appealing either. PICs, of course, don't have the speed to do it by > bit-banging, but the SX certainly does. > > So, just what do I need to: > > 1: Do in-circuit programming > 2: Do in-circuit debugging > 3: Develop in assembly language > > Finally, > > are there any assembler choices that would allow me to use mChip style > assembly mnemonics to develop for the SX? > > Bob Ammerman > RAm Systems > > -- > http://www.piclist.com hint: To leave the PICList > .....piclist-unsubscribe-requestKILLspam@spam@mitvma.mit.edu > > -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestKILLspammitvma.mit.edu

On Mon, 2 Dec 2002 11:50:06 -0500, you wrote: >Believe it or not I am thinking of developing a project on an SX48. I have a >need for multiple UARTs at high baud rates, and you just can't do that on a >PIC. The only dual UART PICs are high pin count monsters, and that isn't >very appealing either. PICs, of course, don't have the speed to do it by >bit-banging, but the SX certainly does. How many channels and how fast ? {Quote hidden}>So, just what do I need to: > >1: Do in-circuit programming >2: Do in-circuit debugging >3: Develop in assembly language > >Finally, > >are there any assembler choices that would allow me to use mChip style >assembly mnemonics to develop for the SX? > >Bob Ammerman >RAm Systems -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu

> So, just what do I need to: > > 1: Do in-circuit programming > 2: Do in-circuit debugging > 3: Develop in assembly language Try SX-Key. SX-Blitz is the programmer-only version http://www.parallaxinc.com/html_files/sxtech/sxtech_home.htm http://www.sxlist.com/techref/parallax/sxkey.htm -- http://www.piclist.com hint: To leave the PICList EraseMEpiclist-unsubscribe-requestspam_OUTTakeThisOuTmitvma.mit.edu

> are there any assembler choices that would allow me to use mChip style > assembly mnemonics to develop for the SX? In-line assembly in Jal uses uChip menmonics but targets (also) the SX18, 28. I have not checked the 48, I'm not sure how different it is. Note that the SX-es are 12-bit core clones with a few extensions. With a few macros for the extensions and some tweak for the fuses (or set the in the prog software) you can just use MPASM, but I don't recall whether the SXbliz/SXkey software could read u uChip hex file. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestspam_OUTmitvma.mit.edu

Bob Ammerman wrote: > Believe it or not I am thinking of developing a project > on an SX48. I have a need for multiple UARTs at high > baud rates, and you just can't do that on a PIC. The > only dual UART PICs are high pin count monsters, > and that isn't very appealing either. PICs, of course, > don't have the speed to do it by bit-banging, but the > SX certainly does... May be I'm missing something, but I can't understand are SX48 REALY much faster then 18FXXXX ? 18FXXXX have more efficient code, so they are not 4 times slower. Mike. -- http://www.piclist.com hint: To leave the PICList @spam@piclist-unsubscribe-requestKILLspammitvma.mit.edu

> May be I'm missing something, but I can't understand > are SX48 REALY much faster then 18FXXXX ? > 18FXXXX have more efficient code, so they are not > 4 times slower. 10MIPS vs 50 or 75MIPS is a big gap to close in s/w -- http://www.piclist.com hint: To leave the PICList KILLspampiclist-unsubscribe-requestKILLspammitvma.mit.edu

There's no way an 18Fxxxx can access IO at the speeds of an SX. ----- Original Message ----- From: "Mike Singer" <RemoveMEmsingerTakeThisOuTPOLUOSTROV.NET> To: <spamBeGonePICLISTspamBeGoneMITVMA.MIT.EDU> Sent: Monday, December 02, 2002 1:44 PM Subject: Re: [SX]: What do I need? {Quote hidden}> Bob Ammerman wrote: > > Believe it or not I am thinking of developing a project > > on an SX48. I have a need for multiple UARTs at high > > baud rates, and you just can't do that on a PIC. The > > only dual UART PICs are high pin count monsters, > > and that isn't very appealing either. PICs, of course, > > don't have the speed to do it by bit-banging, but the > > SX certainly does... > > May be I'm missing something, but I can't understand > are SX48 REALY much faster then 18FXXXX ? > 18FXXXX have more efficient code, so they are not > 4 times slower. > > Mike. > > -- > http://www.piclist.com hint: To leave the PICList > TakeThisOuTpiclist-unsubscribe-requestEraseMEspam_OUTmitvma.mit.edu > -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

> Bob Ammerman wrote: > > Believe it or not I am thinking of developing a project > > on an SX48. I have a need for multiple UARTs at high > > baud rates, and you just can't do that on a PIC. The > > only dual UART PICs are high pin count monsters, > > and that isn't very appealing either. PICs, of course, > > don't have the speed to do it by bit-banging, but the > > SX certainly does... > > May be I'm missing something, but I can't understand > are SX48 REALY much faster then 18FXXXX ? > 18FXXXX have more efficient code, so they are not > 4 times slower. > > Mike. SX48 = 50 to 75 MIPS 18FXXX = 10MIPS (or less depending on the value of XXX) This is a 5x to 7.5x (or higher) difference. For the low-level stuff I need to do, the 18F's coding advantages are just not very significant. Call it perhaps 1.2 vs. the SX So... Net is 5x/1.2 = 4.167 to 7.5x/1.2 = 6.25 Bob Ammerman RAm Systems ----- Original Message ----- From: "Mike Singer" <msingerEraseME.....POLUOSTROV.NET> To: <EraseMEPICLISTMITVMA.MIT.EDU> Sent: Monday, December 02, 2002 4:44 PM Subject: Re: [SX]: What do I need? -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestEraseMEEraseMEmitvma.mit.edu

Actually, I already have code for up to 8 bit-banged UARTS (I published the receiver half of it on the piclist.com). This interrupt-driver code works by doing 'vertical' operations on all 8 UARTS at once. I can currently get 9600 baud on a 20Mhz PIC16F chip (5 MIPS), so I feel this code will let me go up to 115,200 on the SX (up to 75 MIPS). Bob Ammerman RAm Systems {Original Message removed}

> May be I'm missing something, but I can't understand > are SX48 REALY much faster then 18FXXXX ? > 18FXXXX have more efficient code, so they are not > 4 times slower. An SX at 75 MHz run 75 (pic-12) MIPS (but 3 cycles for a jump), an 18F at 10 MHz * 4 runs 10 (pic-16) MIPS. Voor certain tasks (for instance bit-banging asynch comms) pic-12 and pic-16 don't differ that much. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads