Phil, Yes the mega48 is the correct data sheet, it is 10 bits and the lowest 2 bits are dropped. Yes it can be made to give you a 10 bit result. I just did not see the need for higher resolution for the typical application. A few lines of code is all the change necessary. There are so many ways to set up an ADC I just picked one.
The code is easily ported to the mega88 and 168 as well, Ihave both for testing. All that needs to be done is change the minimum memory address pointers to allow more memory to be used. I buy the mega48 in 100 qty so I just used that.
boeboy, I made a servo chip from a tiiny11. Again , there are so many ways to set up a servo PWM chip, total number of servos and resolution of the pulse width. The servo chip I made has 11 us resolution plus or minus but for my testing I did not see any jitter. I can program anything that can be programmed so these two example chips are pretty much just an example of what can be done.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
metron9 said...
Phil, Yes the mega48 is the correct data sheet,
it is 10 bits and the lowest 2 bits are dropped. Yes it can be made
to give you a 10 bit result. I just did not see the need for higher
resolution for the typical application. A few lines of code is all the
change necessary. There are so many ways to set up an ADC I
just picked one.
Metron,
I agree that for most applications, an 8-bit ADC value will suffice.
It just seemed that it would be desireable for the atypical user to
have an option for accessing the full 10-bit ADC conversion.
Perhaps this could be implemented via a mode selection bit, with
8-bits being the default mode.
"Perhaps this could be implemented via a mode selection bit, with
8-bits being the default mode."
Ahh but there are three different references one can use as well.
1 use internal 1.1 reference
2 use AVCC
3 use External AREF
Then add the 8 or 16 bit output of two modes
we now have six modes.
A new mode command $A6 with a second byte as the mode 1..6
One byte return value (left shifted 8 bit value)
1 use internal 1.1 reference
2 use AVCC
3 use External AREF
Two byte return value High/Low
4 use internal 1.1 reference
5 use AVCC
6 use External AREF
Not sure yet if shiftin can use just a 2 bit variable, I know you can specify 2 bits to read into an 8 bit bariable but I am not sure when you use the variable in your calculations if it makes any difference. You cant just add or subtract in assembler a two bit register because there isn't one, you have to use a full byte so Pbasic under the hood uses a temporary 8 bit value anyway. The SX and Prop can use a temporary high byte for input and store the two bits if it is running low on registers. Same for Pbasic, read in the high byte in temporary 8 bit variable and store the result in 2 bits if it needs more space. So as you can see, there are a lot of ways to go. Perhaps you have some input on the 2 high bits to shift in, use an 8 bit variable or a 2 bit.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
Metron9,
Ok, I,ve got the delay in and it is reading better. My last problem with the ADC before retiring yesterday was in reading a pot.
While turning slowly as I got near the end of the turn it would read the opposite, for a small voltage change, then get right again.
I suspected my pot and turned it around and got the same thing. I want to try out some of the other functions for a while and then I'll come back to this with another pot.
OK, Here's another. I don't see the codes for all the commands on your document list. For instance what is the command code for _ADCVCCx? How about _STIME?
Sorry about the confusion there Franklin. I did not actually code the additional ADC commands yet. I wrote the cover page for the commands first and then coded the subroutines. After coding the initial ADC routines that use the 1.1 reference I skipped to the memory routines because those were the ones I wanted to do at the time. I will add the various modes in the future. For now use a capacitor on the AREF pin to ground and the ADC read commands will read the internal 1.1V reference.
I see I also neglected to put the set time command in the list. I will just repost here the pbasic code I was using to test various functions.
I wish I had someone to do the documentation and wrap up all the loose ends with this kind of stuff because I am one of those people that only likes to work on things I find interesting at the time, I think I have ADD I can do very complex programming but the simple stuff of documenting things and dotting my I's and T's is something I have a very hard time with. That's why I have a secretary that takes care of all that for me in my real job.
Anyway I think all the code for all the commands are in this code, if something specific is missing or doesn't work let me know.
A note on the ADC if you wish to read VCC instead of the 1.1 internal reference.
I have tested the ADC by putting VCC on the AREF pin and even though internally I use the internal 1.1 voltage reference I think the AREF connected this way will override the 1.1 internal voltage supply and allow you to measure up to 5V or whatever you are powering the chip with.
' {$STAMP BS2}
' {$PBASIC 2.5}
' {$PORT COM2}
_INIT CON $FFAA 'INITIALIZE COPROCESSOR
_ERRORS CON $FE 'Get Error Flags
_LOW CON $B0 'SET PIN OUTPUT LOW
_HIGH CON $B1 'SET PIN OUTPUT HIGH
_INPUT CON $B2 'SET PIN TO INPUT
_INPUTP CON $B6 'SET PIN TO INPUT WITH PULLUP
_PUSH CON $D0 'PUSH ONE BYTE ON STACK at the current sram pointer and increment pointer
_POP CON $D1 'decrement sram pointer and POP ONE BYTE OFF STACK
_ZSTACK CON $D2 'ZERO THE STACK POINTER
_CLRBL CON $B7 'CLEAR THE BLATCH REGISTER
_CLRCL CON $B8 'CLEAR THE CLATCH REGISTER
_RPINSA CON $C0 'READ PINS 0...5
_RPINSB CON $C1 'READ PINS 6..11
_RPINSC CON $C2 'READ PINS 12..18
_PINSBL CON $C3 'READ LATCHED LOW PINS 6..11
_PINSCL CON $C4 'READ LATCHED HIGH PINS 12..18
_SECONDS CON $C5 'Read seconds
_MINUTES CON $C6 'Read Minutes
_HOURS CON $C7 'Read Hours
_DAYS CON $C8 'Read Days
_TIME CON $C9 'Read seconds,minutes,hours
_ADC0 CON $A0 'READ ADC0
_ADC1 CON $A1 'READ ADC1
_ADC2 CON $A2 'READ ADC2
_ADC3 CON $A3 'READ ADC3
_ADC4 CON $A4 'READ ADC4
_WRITEFLASH CON $D3 'write 255 bytes from SRAM to FLASH memory
_READFLASH CON $D4 'Read 255 bytes from FLASH to SRAM memory
_Readsram CON $D5 'Read a byte at the current sram pointer and increment pointer
_setstack CON $D6 'Set the Sram pointer
_EWRITE CON $D7 'wRITE A BYTE TO EEPROM
_EREAD CON $D8 'Read a byte from EEPROM
_SETTIME CON $D9 'Set seconds,minutes,hours,days
page VAR Byte
TEMP VAR Word
BUFFER VAR Byte
Seconds VAR Byte
Minutes VAR Byte
Hours VAR Byte
days VAR Byte
Address VAR Byte
PAUSE 1000
DEBUG "CO-PRO-M48 Command Test Program",CR
'Initialize Coprocessor
SHIFTOUT 0,1,1,[noparse][[/noparse]_INIT\16]
adc:
SHIFTOUT 0,1,1,[noparse][[/noparse]_ADC0]
SHIFTIN 0,1,0,[noparse][[/noparse]buffer]
DEBUG "ADC0 Value = ",DEC buffer,CR
END
'settime seconds,minutes,hours,days
SHIFTOUT 0,1,1,[noparse][[/noparse]_SETTIME,58,59,23,255]
'Test High and Low of all 18 pins
FOR temp=0 TO 17
SHIFTOUT 0,1,1,[noparse][[/noparse]_HIGH,temp] : DEBUG "Pin 1 is HIGH",CR :PAUSE 100
'Set a PIN LOW
SHIFTOUT 0,1,1,[noparse][[/noparse]_LOW,temp] : DEBUG "Pin 1 is LOW",CR :PAUSE 100
NEXT
'Test timer get time variables
SHIFTOUT 0,1,1,[noparse][[/noparse]_TIME]
SHIFTIN 0,1,0,[noparse][[/noparse]Seconds,Minutes,Hours,days]
DEBUG "Days ", DEC days, " Hrs ", DEC Hours," MIN ",DEC Minutes," Sec ",DEC Seconds,CR
'Get seconds,minutes,hours,days with seperate commands
SHIFTOUT 0,1,1,[noparse][[/noparse]_SECONDS]
SHIFTIN 0,1,0,[noparse][[/noparse]Seconds]
SHIFTOUT 0,1,1,[noparse][[/noparse]_MINUTES]
SHIFTIN 0,1,0,[noparse][[/noparse]MINUTES]
SHIFTOUT 0,1,1,[noparse][[/noparse]_HOURS]
SHIFTIN 0,1,0,[noparse][[/noparse]HOURS]
SHIFTOUT 0,1,1,[noparse][[/noparse]_DAYS]
SHIFTIN 0,1,0,[noparse][[/noparse]DAYS]
DEBUG "Days ", DEC days, " Hrs ", DEC Hours," MIN ",DEC Minutes," Sec ",DEC Seconds,CR
'Test EEPROM Write and READ (_ewrite,Address,Byte to write)
TEMP=127
Address=1
SHIFTOUT 0,1,1,[noparse][[/noparse]_EWRITE,Address,TEMP]
PAUSE 1
SHIFTOUT 0,1,1,[noparse][[/noparse]_EREAD,Address]
SHIFTIN 0,1,0, [noparse][[/noparse]buffer]
DEBUG "The eeprom address ",DEC Address," = ",DEC buffer,CR
'Test flash memory storage
SHIFTOUT 0,1,1,[noparse][[/noparse]_zSTACK]
DEBUG "Writing Sram location 0 with 127",CR
SHIFTOUT 0,1,1,[noparse][[/noparse]_PUSH,127]
DEBUG "Writing 256 byte buffer to page 1 of flash memory",CR
page=1
SHIFTOUT 0,1,1,[noparse][[/noparse]_WRITEFLASH,page]
PAUSE 30
testpins:
'Set a pin High
SHIFTOUT 0,1,1,[noparse][[/noparse]_HIGH,1] : DEBUG "Pin 1 is HIGH",CR :PAUSE 1000
'Set a PIN LOW
SHIFTOUT 0,1,1,[noparse][[/noparse]_LOW,1] : DEBUG "Pin 1 is LOW",CR :PAUSE 1000
'Set a PIN TO INPUT with a Pullup
SHIFTOUT 0,1,1,[noparse][[/noparse]_INPUTP,1] : DEBUG "Pin 1 is INPUT with Pullup",CR :PAUSE 1000
'Set a PIN TO INPUT
SHIFTOUT 0,1,1,[noparse][[/noparse]_INPUT,1] : DEBUG "Pin 1 is INPUT",CR :PAUSE 1000
'Push a byte on the stack
SHIFTOUT 0,1,1,[noparse][[/noparse]_PUSH,$AA]
'Pop a byte from the stack
SHIFTOUT 0,1,1,[noparse][[/noparse]_POP]
SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER]
DEBUG HEX buffer,CR
'Clear the Blatch register
SHIFTOUT 0,1,1,[noparse][[/noparse]_CLRBL]
'clear the Clatch register
SHIFTOUT 0,1,1,[noparse][[/noparse]_CLRCL]
'Read pins A
SHIFTOUT 0,1,1,[noparse][[/noparse]_RPINSA]
SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER]
'Read pins B
SHIFTOUT 0,1,1,[noparse][[/noparse]_RPINSB]
SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER]
'Read pins C
SHIFTOUT 0,1,1,[noparse][[/noparse]_RPINSC]
SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER]
'Read the Blatch Register
SHIFTOUT 0,1,1,[noparse][[/noparse]_PINSBL]
SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER]
'Read the Clatch Register
SHIFTOUT 0,1,1,[noparse][[/noparse]_PINSCL]
SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER]
'Read error register
SHIFTOUT 0,1,1,[noparse][[/noparse]_ERRORS]
SHIFTIN 0,1,0,[noparse][[/noparse]buffer]
DEBUG CR,"Errors ", BIN8 buffer,CR
END
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
bambino said...
My last problem with the ADC before retiring yesterday was in reading a pot. While turning slowly as I got near the end of the turn it would read the opposite, for a small voltage change, then get right again. I suspected my pot and turned it around and got the same thing. I want to try out some of the other functions for a while and then I'll come back to this with another pot.
I have a well-worn pot that behaves like this! A voltmeter confirmed it was the pot that was causing the anomaly in the reading.
Sparks,
Indeed, the pot was suspected. I have since replaced it and still get the same results. I did check it with a meter and found I was reading 254
@ just over three volts.(AREF tied to VCC). I changed the connection to use a cap to gnd from AREF and this cured the problem.
Honestly, It was acting like I was recieving the 8LSB of a 10 bit reading rather than the 8MSB, except that when it rolled over a small adjustment to the
pot would bring it back in line.
Metron9,
I have finished everything but the Flash commands. So far so good!
OK, so I'm slow. I haven't had much time to work with this so today I set it up and tried to read a voltage. NOTHING.. I was using ADC0 and had my voltage on pin0 (since there is no documentation or a reference to reading the data sheet for the mega48 chip from Atmel) After trying for a while I figured out ADC0 reads pin23 (pin12 on Metron9's chip) DUH!
Got it going now and will keep testing.
If I could find someone who wanted to work with me and take care of documenting and perhaps selling the chips I can make, that would be a step in the right direction. Here is an updated how to hook up the chip picture.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
Would love to help, but Time is so scarce right now that there is no way I could take on another project.
It seems most of all the documentation is here though, it just needs to be compiled into a pdf or something!
Here is an idea for you though: how about putting the servo app in the Co-Pro Mege 48 as an enable/disable feature.
Comments
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My computer, http://forums.parallax.com/showthread.php?p=630466
The code is easily ported to the mega88 and 168 as well, Ihave both for testing. All that needs to be done is change the minimum memory address pointers to allow more memory to be used. I buy the mega48 in 100 qty so I just used that.
boeboy, I made a servo chip from a tiiny11. Again , there are so many ways to set up a servo PWM chip, total number of servos and resolution of the pulse width. The servo chip I made has 11 us resolution plus or minus but for my testing I did not see any jitter. I can program anything that can be programmed so these two example chips are pretty much just an example of what can be done.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
Metron,
I agree that for most applications, an 8-bit ADC value will suffice.
It just seemed that it would be desireable for the atypical user to
have an option for accessing the full 10-bit ADC conversion.
Perhaps this could be implemented via a mode selection bit, with
8-bits being the default mode.
phil
8-bits being the default mode."
Ahh but there are three different references one can use as well.
1 use internal 1.1 reference
2 use AVCC
3 use External AREF
Then add the 8 or 16 bit output of two modes
we now have six modes.
A new mode command $A6 with a second byte as the mode 1..6
One byte return value (left shifted 8 bit value)
1 use internal 1.1 reference
2 use AVCC
3 use External AREF
Two byte return value High/Low
4 use internal 1.1 reference
5 use AVCC
6 use External AREF
Not sure yet if shiftin can use just a 2 bit variable, I know you can specify 2 bits to read into an 8 bit bariable but I am not sure when you use the variable in your calculations if it makes any difference. You cant just add or subtract in assembler a two bit register because there isn't one, you have to use a full byte so Pbasic under the hood uses a temporary 8 bit value anyway. The SX and Prop can use a temporary high byte for input and store the two bits if it is running low on registers. Same for Pbasic, read in the high byte in temporary 8 bit variable and store the result in 2 bits if it needs more space. So as you can see, there are a lot of ways to go. Perhaps you have some input on the 2 high bits to shift in, use an 8 bit variable or a 2 bit.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
Ok, I,ve got the delay in and it is reading better. My last problem with the ADC before retiring yesterday was in reading a pot.
While turning slowly as I got near the end of the turn it would read the opposite, for a small voltage change, then get right again.
I suspected my pot and turned it around and got the same thing. I want to try out some of the other functions for a while and then I'll come back to this with another pot.
Ps, See my other post in the servo thread.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
- Stephen
I see I also neglected to put the set time command in the list. I will just repost here the pbasic code I was using to test various functions.
I wish I had someone to do the documentation and wrap up all the loose ends with this kind of stuff because I am one of those people that only likes to work on things I find interesting at the time, I think I have ADD I can do very complex programming but the simple stuff of documenting things and dotting my I's and T's is something I have a very hard time with. That's why I have a secretary that takes care of all that for me in my real job.
Anyway I think all the code for all the commands are in this code, if something specific is missing or doesn't work let me know.
A note on the ADC if you wish to read VCC instead of the 1.1 internal reference.
I have tested the ADC by putting VCC on the AREF pin and even though internally I use the internal 1.1 voltage reference I think the AREF connected this way will override the 1.1 internal voltage supply and allow you to measure up to 5V or whatever you are powering the chip with.
' {$STAMP BS2} ' {$PBASIC 2.5} ' {$PORT COM2} _INIT CON $FFAA 'INITIALIZE COPROCESSOR _ERRORS CON $FE 'Get Error Flags _LOW CON $B0 'SET PIN OUTPUT LOW _HIGH CON $B1 'SET PIN OUTPUT HIGH _INPUT CON $B2 'SET PIN TO INPUT _INPUTP CON $B6 'SET PIN TO INPUT WITH PULLUP _PUSH CON $D0 'PUSH ONE BYTE ON STACK at the current sram pointer and increment pointer _POP CON $D1 'decrement sram pointer and POP ONE BYTE OFF STACK _ZSTACK CON $D2 'ZERO THE STACK POINTER _CLRBL CON $B7 'CLEAR THE BLATCH REGISTER _CLRCL CON $B8 'CLEAR THE CLATCH REGISTER _RPINSA CON $C0 'READ PINS 0...5 _RPINSB CON $C1 'READ PINS 6..11 _RPINSC CON $C2 'READ PINS 12..18 _PINSBL CON $C3 'READ LATCHED LOW PINS 6..11 _PINSCL CON $C4 'READ LATCHED HIGH PINS 12..18 _SECONDS CON $C5 'Read seconds _MINUTES CON $C6 'Read Minutes _HOURS CON $C7 'Read Hours _DAYS CON $C8 'Read Days _TIME CON $C9 'Read seconds,minutes,hours _ADC0 CON $A0 'READ ADC0 _ADC1 CON $A1 'READ ADC1 _ADC2 CON $A2 'READ ADC2 _ADC3 CON $A3 'READ ADC3 _ADC4 CON $A4 'READ ADC4 _WRITEFLASH CON $D3 'write 255 bytes from SRAM to FLASH memory _READFLASH CON $D4 'Read 255 bytes from FLASH to SRAM memory _Readsram CON $D5 'Read a byte at the current sram pointer and increment pointer _setstack CON $D6 'Set the Sram pointer _EWRITE CON $D7 'wRITE A BYTE TO EEPROM _EREAD CON $D8 'Read a byte from EEPROM _SETTIME CON $D9 'Set seconds,minutes,hours,days page VAR Byte TEMP VAR Word BUFFER VAR Byte Seconds VAR Byte Minutes VAR Byte Hours VAR Byte days VAR Byte Address VAR Byte PAUSE 1000 DEBUG "CO-PRO-M48 Command Test Program",CR 'Initialize Coprocessor SHIFTOUT 0,1,1,[noparse][[/noparse]_INIT\16] adc: SHIFTOUT 0,1,1,[noparse][[/noparse]_ADC0] SHIFTIN 0,1,0,[noparse][[/noparse]buffer] DEBUG "ADC0 Value = ",DEC buffer,CR END 'settime seconds,minutes,hours,days SHIFTOUT 0,1,1,[noparse][[/noparse]_SETTIME,58,59,23,255] 'Test High and Low of all 18 pins FOR temp=0 TO 17 SHIFTOUT 0,1,1,[noparse][[/noparse]_HIGH,temp] : DEBUG "Pin 1 is HIGH",CR :PAUSE 100 'Set a PIN LOW SHIFTOUT 0,1,1,[noparse][[/noparse]_LOW,temp] : DEBUG "Pin 1 is LOW",CR :PAUSE 100 NEXT 'Test timer get time variables SHIFTOUT 0,1,1,[noparse][[/noparse]_TIME] SHIFTIN 0,1,0,[noparse][[/noparse]Seconds,Minutes,Hours,days] DEBUG "Days ", DEC days, " Hrs ", DEC Hours," MIN ",DEC Minutes," Sec ",DEC Seconds,CR 'Get seconds,minutes,hours,days with seperate commands SHIFTOUT 0,1,1,[noparse][[/noparse]_SECONDS] SHIFTIN 0,1,0,[noparse][[/noparse]Seconds] SHIFTOUT 0,1,1,[noparse][[/noparse]_MINUTES] SHIFTIN 0,1,0,[noparse][[/noparse]MINUTES] SHIFTOUT 0,1,1,[noparse][[/noparse]_HOURS] SHIFTIN 0,1,0,[noparse][[/noparse]HOURS] SHIFTOUT 0,1,1,[noparse][[/noparse]_DAYS] SHIFTIN 0,1,0,[noparse][[/noparse]DAYS] DEBUG "Days ", DEC days, " Hrs ", DEC Hours," MIN ",DEC Minutes," Sec ",DEC Seconds,CR 'Test EEPROM Write and READ (_ewrite,Address,Byte to write) TEMP=127 Address=1 SHIFTOUT 0,1,1,[noparse][[/noparse]_EWRITE,Address,TEMP] PAUSE 1 SHIFTOUT 0,1,1,[noparse][[/noparse]_EREAD,Address] SHIFTIN 0,1,0, [noparse][[/noparse]buffer] DEBUG "The eeprom address ",DEC Address," = ",DEC buffer,CR 'Test flash memory storage SHIFTOUT 0,1,1,[noparse][[/noparse]_zSTACK] DEBUG "Writing Sram location 0 with 127",CR SHIFTOUT 0,1,1,[noparse][[/noparse]_PUSH,127] DEBUG "Writing 256 byte buffer to page 1 of flash memory",CR page=1 SHIFTOUT 0,1,1,[noparse][[/noparse]_WRITEFLASH,page] PAUSE 30 testpins: 'Set a pin High SHIFTOUT 0,1,1,[noparse][[/noparse]_HIGH,1] : DEBUG "Pin 1 is HIGH",CR :PAUSE 1000 'Set a PIN LOW SHIFTOUT 0,1,1,[noparse][[/noparse]_LOW,1] : DEBUG "Pin 1 is LOW",CR :PAUSE 1000 'Set a PIN TO INPUT with a Pullup SHIFTOUT 0,1,1,[noparse][[/noparse]_INPUTP,1] : DEBUG "Pin 1 is INPUT with Pullup",CR :PAUSE 1000 'Set a PIN TO INPUT SHIFTOUT 0,1,1,[noparse][[/noparse]_INPUT,1] : DEBUG "Pin 1 is INPUT",CR :PAUSE 1000 'Push a byte on the stack SHIFTOUT 0,1,1,[noparse][[/noparse]_PUSH,$AA] 'Pop a byte from the stack SHIFTOUT 0,1,1,[noparse][[/noparse]_POP] SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER] DEBUG HEX buffer,CR 'Clear the Blatch register SHIFTOUT 0,1,1,[noparse][[/noparse]_CLRBL] 'clear the Clatch register SHIFTOUT 0,1,1,[noparse][[/noparse]_CLRCL] 'Read pins A SHIFTOUT 0,1,1,[noparse][[/noparse]_RPINSA] SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER] 'Read pins B SHIFTOUT 0,1,1,[noparse][[/noparse]_RPINSB] SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER] 'Read pins C SHIFTOUT 0,1,1,[noparse][[/noparse]_RPINSC] SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER] 'Read the Blatch Register SHIFTOUT 0,1,1,[noparse][[/noparse]_PINSBL] SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER] 'Read the Clatch Register SHIFTOUT 0,1,1,[noparse][[/noparse]_PINSCL] SHIFTIN 0,1,0,[noparse][[/noparse]BUFFER] 'Read error register SHIFTOUT 0,1,1,[noparse][[/noparse]_ERRORS] SHIFTIN 0,1,0,[noparse][[/noparse]buffer] DEBUG CR,"Errors ", BIN8 buffer,CR END▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
Thanks!
- Sparks
*for PC gaming
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
My computer, http://forums.parallax.com/showthread.php?p=630466
Indeed, the pot was suspected. I have since replaced it and still get the same results. I did check it with a meter and found I was reading 254
@ just over three volts.(AREF tied to VCC). I changed the connection to use a cap to gnd from AREF and this cured the problem.
Honestly, It was acting like I was recieving the 8LSB of a 10 bit reading rather than the 8MSB, except that when it rolled over a small adjustment to the
pot would bring it back in line.
Metron9,
I have finished everything but the Flash commands. So far so good!
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
Got it going now and will keep testing.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
- Stephen
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!
It seems most of all the documentation is here though, it just needs to be compiled into a pdf or something!
Here is an idea for you though: how about putting the servo app in the Co-Pro Mege 48 as an enable/disable feature.