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Discussion Groups | Piclist | RE: external a to d converer
A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.
Serout2,Serin2 Help - ramtec73 - Mar 6 1:08:00 2004
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Here is what I have. I am using a PIC16F877A and PICBasic Pro DEFINE LCD_DREG PORTD DEFINE LCD_DBIT 4 DEFINE LCD_RSREG PORTE DEFINE LCD_RSBIT 0 DEFINE LCD_EREG PORTE DEFINE LCD_EBIT 1 DEFINE LCD_COMMANDUS 2000 DEFINE DATAUS 50 DEFINE OSC 10 include "modedefs.bas" temp VAR WORD TRISA = %11111111 ' Set PORTA to all input ADCON1 = %10000101 Low PORTE.2 ' LCD R/W line low Pause 500 ' Wait .5 second LCDout $fe,1 LCDout "test serout" temp=5 loop: Serout2 PORTE.2,4,[temp] '2400 rate Serin2 PORTA.2,4[Dec temp] LCDout $fe.$c0,temp Goto Loop end So far all I see on the LCD is just 'test serout' on the first line. I thought this line of codes will print 'test serout' on the first line and '5' on the second line. Does anyone see any mistake in this coding? Thanks Randy |
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RE: Serout2,Serin2 Help - Charles Linquist - Mar 6 1:41:00 2004
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You need a comma, not a period between $FE and $C0 Charles Linquist -----Original Message----- From: ramtec73 [mailto:] Sent: Friday, March 05, 2004 10:09 PM To: Subject: [piclist] Serout2,Serin2 Help Here is what I have. I am using a PIC16F877A and PICBasic Pro DEFINE LCD_DREG PORTD DEFINE LCD_DBIT 4 DEFINE LCD_RSREG PORTE DEFINE LCD_RSBIT 0 DEFINE LCD_EREG PORTE DEFINE LCD_EBIT 1 DEFINE LCD_COMMANDUS 2000 DEFINE DATAUS 50 DEFINE OSC 10 include "modedefs.bas" temp VAR WORD TRISA = %11111111 ' Set PORTA to all input ADCON1 = %10000101 Low PORTE.2 ' LCD R/W line low Pause 500 ' Wait .5 second LCDout $fe,1 LCDout "test serout" temp=5 loop: Serout2 PORTE.2,4,[temp] '2400 rate Serin2 PORTA.2,4[Dec temp] LCDout $fe.$c0,temp Goto Loop end So far all I see on the LCD is just 'test serout' on the first line. I thought this line of codes will print 'test serout' on the first line and '5' on the second line. Does anyone see any mistake in this coding? Thanks Randy to unsubscribe, go to http://www.yahoogroups.com and follow the instructions Yahoo! Groups Links |
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Re: Serout2,Serin2 Help - ramtec73 - Mar 6 20:04:00 2004
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Has anyone tried sending and receiving on the same pic using Serin/Serin2 and Serout/Serout2? --- In , "Charles Linquist" <Charles@L...> wrote: > > You need a comma, not a period between $FE and $C0 > > Charles Linquist > -----Original Message----- > From: ramtec73 [mailto:anilram@e...] > Sent: Friday, March 05, 2004 10:09 PM > To: > Subject: [piclist] Serout2,Serin2 Help > > Here is what I have. I am using a PIC16F877A and PICBasic Pro > > DEFINE LCD_DREG PORTD > DEFINE LCD_DBIT 4 > DEFINE LCD_RSREG PORTE > DEFINE LCD_RSBIT 0 > DEFINE LCD_EREG PORTE > DEFINE LCD_EBIT 1 > DEFINE LCD_COMMANDUS 2000 > DEFINE DATAUS 50 > DEFINE OSC 10 > > include "modedefs.bas" > > temp VAR WORD > TRISA = %11111111 ' Set PORTA to all input > ADCON1 = %10000101 > Low PORTE.2 ' LCD R/W line low > > Pause 500 ' Wait .5 second > > LCDout $fe,1 > LCDout "test serout" > > temp=5 > loop: > > Serout2 PORTE.2,4,[temp] '2400 rate > Serin2 PORTA.2,4[Dec temp] > > LCDout $fe.$c0,temp > Goto Loop > end > So far all I see on the LCD is just 'test serout' on the first line. > I thought this line of codes will print 'test serout' on the first line and > '5' on the second line. > > Does anyone see any mistake in this coding? > > Thanks > Randy > > > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions > Yahoo! Groups Links |
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Re: Re: Serout2,Serin2 Help - Author Unknown - Mar 6 20:08:00 2004
In a message dated 3/6/2004 8:05:20 PM Eastern
Standard Time, a...@engineer.com writes:Has anyone tried sending and receiving on the same pic using You can't do that because when the PIC gets to serin the message has already been sent and there is nothing there to receive. Sid |
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Re: Re: Serout2,Serin2 Help - randy ram - Mar 6 20:35:00 2004
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I am using a 877A. Can I then transmit from it and receive on another PIC such as the 628? I guess that can be done. I guess I will have to turn the 628 (rx) first before the 877A(tx). Next question will be how will I set us the the receiving PIC? Will the same code that I post on this topic work? Thanks Randy Has anyone tried sending and receiving on the same pic using You can't do that because when the PIC gets to serin the message has already been sent and there is nothing there to receive. Sid to unsubscribe, go to http://www.yahoogroups.com and follow the instructions -- ___________________________________________________________ |
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Re: Re: Serout2,Serin2 Help - Author Unknown - Mar 7 8:54:00 2004
In a message dated 3/6/2004 8:36:18 PM Eastern
Standard Time, a...@engineer.com writes:I am using a 877A. Can I then transmit from it and receive on another PIC such as the 628? I guess that can be done. I guess I will have to turn the 628 (rx) first before the 877A(tx). Next question will be how will I set us the the receiving PIC? Will the same code that I post on this topic work?Here is a way to establish communication between two PICs: Master start: serout2 so, N9600, ["X"] serin2 si, N9600, 1000, nocom,[com] debug cls debug "Communication established with PIC.",cr pause 1500 goto init1 nocom: goto start init1: (Main program) Slave: Start: serin2 si, baud, [com] serout2 so, baud, ["X"] main: (slave waits for instructions) If you are in a noisy environment, you might want to write for the master: serout2 so, baud, ["ABC", "X"] and for the slave: serin2 si, baud, [wait("ABC"), com] The ABC on serin ensures that the slave will wait for a transmission beginning with "ABC" and will ignore all other signals. Once you have established communication, you can send the slave other commands to have it perform a task. Remember that the PIC has no buffer, so when you send a command from the master to the slave, the slave must be sitting there waiting for it, not off doing something else. The connections between the PIC serin and serout lines should be via a 270 ohm resistor to protect the I/O ports. Sid |
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external a to d converer - jean michel urbani - Mar 7 9:33:00 2004
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hello List, I have lingered on the net for the last 2 monthes to try to get info on how to use an external ad converter with a pic 16F628 and can't nanaged get it. could someone help me ? thanks jean mi Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout ! Créez votre Yahoo! Mail sur http://fr.benefits.yahoo.com/ Dialoguez en direct avec vos amis grâce à Yahoo! Messenger !Téléchargez Yahoo! Messenger sur http://fr.messenger.yahoo.com |
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RE: external a to d converer - Wouter van Ooijen - Mar 7 9:37:00 2004
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> I have lingered on the net for the last 2 monthes to > try to get info on how to use an external ad converter > with a pic 16F628 and can't nanaged get it. You'd have to buy an nw chip, so why not buy a PIC with A/D? Check for instance the 16F88. If you realy want an external A/D you need to interface it, so what would you use? parallel, SPI, I2C? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products |
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Re: external a to d converer - Chad Russel - Mar 7 12:51:00 2004
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Is this the fuel cell output? Many things have to be taken into account when choosing an A to D. If you know it has to be external, then it must be special. Maxim makes some very good AtoDs with 3 wire interfaces. Chad --- jean michel urbani <> wrote: > hello List, > > I have lingered on the net for the last 2 monthes to > try to get info on how to use an external ad converter > with a pic 16F628 and can't nanaged get it. > > could someone help me ? > > thanks > > jean mi > > Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout > ! > Créez votre Yahoo! Mail sur http://fr.benefits.yahoo.com/ > > Dialoguez en direct avec vos amis grâce à Yahoo! Messenger > !Téléchargez Yahoo! Messenger sur http://fr.messenger.yahoo.com ===== My software has no bugs. Only undocumented features. __________________________________ |
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Re: Re: Serout2,Serin2 Help - randy ram - Mar 7 20:36:00 2004
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Why is that everytime I use the 'wait' in say, serin2 si, N9600, [wait("ABC"), com] I get an error saying Bad expression. If I remove it, there is no error. But I rather use the wait. Is there anything I have to declare or define something at the top of the program? Randy I am using a 877A. Can I then transmit from it and receive on another PIC such as the 628? I guess that can be done. I guess I will have to turn the 628 (rx) first before the 877A(tx). Next question will be how will I set us the the receiving PIC? Will the same code that I post on this topic work?Here is a way to establish communication between two PICs: Master start: serout2 so, N9600, ["X"] serin2 si, N9600, 1000, nocom,[com] debug cls debug "Communication established with PIC.",cr pause 1500 goto init1 nocom: goto start init1: (Main program) Slave: Start: serin2 si, baud, [com] serout2 so, ba ud, ["X"] main: (slave waits for instructions) If you are in a noisy environment, you might want to write for the master: serout2 so, baud, ["ABC", "X"] and for the slave: serin2 si, baud, [wait("ABC"), com] The ABC on serin ensures that the slave will wait for a transmission beginning with "ABC" and will ignore all other signals. Once you have established communication, you can send the slave other commands to have it perform a task. Remember that the PIC has no buffer, so when you send a command from the master to the slave, the slave must be sitting there waiting for it, not off doing something else. The connections between the PIC serin and serout lines should be via a 270 ohm resistor to protect the I/O ports. Sid to unsubscribe, go to http://www.yahoogroups.com and follow the instructions Yahoo! Groups Links
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Re: external a to d converer - upand_at_them - Mar 7 20:56:00 2004
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Any ADC in particular? You have two choices for the interface: parallel or serial. Maxim has a lot of great ADCs with serial interfaces. A few I/O lines is all you need to communicate with them. If you're looking for a turnkey example you may not find it, but these are straightforward devices to work with. And if you're using a serial ADC writing the interface code is a good learing experience. Here are some examples I found (only took me a few seconds): http://www.iguanalabs.com/adc2051.htm http://www.maxim-ic.com/appnotes.cfm/appnote_number/2394/ln/en http://www.electronic- engineering.ch/microchip/projects/adc_test/nsc12130.html http://www.technology.niagarac.on.ca/people/mcsele/TemperatureAlarm.ht m http://www.parallaxinc.com/downloads/Documentation/Application% 20Kits/LTC1298%2012-bit%20AtoD%20Converter/LTC1298%2012-bit%20AtoD% 20Converter.pdf Mike --- In , jean michel urbani <jmurba@y...> wrote: > hello List, > > I have lingered on the net for the last 2 monthes to > try to get info on how to use an external ad converter > with a pic 16F628 and can't nanaged get it. > > could someone help me ? > > thanks > > jean mi > > Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout ! > Créez votre Yahoo! Mail sur http://fr.benefits.yahoo.com/ > > Dialoguez en direct avec vos amis grâce à Yahoo! Messenger ! Téléchargez Yahoo! Messenger sur http://fr.messenger.yahoo.com |
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Re: Re: Serout2,Serin2 Help - Author Unknown - Mar 8 8:10:00 2004
In a message dated 3/7/2004 8:37:48 PM Eastern
Standard Time, a...@engineer.com writes:serin2 si, N9600, [wait("ABC"), com] I get an error saying Bad expression. If I remove it, there is no error. But I rather use the wait. Is there anything I have to declare or define something at the top of the program? That is a perfectly good command, Randy. There are several things that could give you a "bad expression" when compiling: si not declared N9600 not declared make sure your xmission is enclosed in " [ ] ", not " { } ". Don't know what PIC you are using - maybe it uses serin, not serin2. Anyway, stay with it - it is a good command. Sid |
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Re: Re: Serout2,Serin2 Help - randy ram - Mar 11 9:43:00 2004
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Did I mention that this data was going to be displayed on to a LCD. ----- Original Message ----- From: N...@aol.com Date: Sun, 7 Mar 2004 08:54:15 EST To: p...@yahoogroups.com Subject: Re: [piclist] Re: Serout2,Serin2 Help In a message dated 3/6/2004 8:36:18 PM Eastern Standard Time, a...@engineer.com writes: I am using a 877A. Can I then transmit from it and receive on another PIC such as the 628? I guess that can be done. I guess I will have to turn the 628 (rx) first before the 877A(tx). Next question will be how will I set us the the receiving PIC? Will the same code that I post on this topic work?Here is a way to establish communication between two PICs: Master start: serout2 so, N9600, ["X"] serin2 si, N9600, 1000, nocom,[com] debug cls debug "Communication established with PIC.",cr pause 1500 goto init1 nocom: goto start init1: (Main program) Slave: Start: serin2 si, baud, [com] serout2 so, ba ud, ["X"] main: (slave waits for instructions) If you are in a noisy environment, you might want to write for the master: serout2 so, baud, ["ABC", "X"] and for the slave: serin2 si, baud, [wait("ABC"), com] The ABC on serin ensures that the slave will wait for a transmission beginning with "ABC" and will ignore all other signals. Once you have established communication, you can send the slave other commands to have it perform a task. Remember that the PIC has no buffer, so when you send a command from the master to the slave, the slave must be sitting there waiting for it, not off doing something else. The connections between the PIC serin and serout lines should be via a 270 ohm resistor to protect the I/O ports. Sid to unsubscribe, go to http://www.yahoogroups.com and follow the instructions Yahoo! Groups Links
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