Spending a little more time on the Microchip selector site, I think PIC16F687 might do the trick - 20 pin DIP, 18 I/O pins with Rx on RB5 and RC0-7 available.
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Re: Best way to use USART/HSERIN
Spending a little more time on the Microchip selector site, I think PIC16F687 might do the trick - 20 pin DIP, 18 I/O pins with Rx on RB5 and RC0-7 available.
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Re: Best way to use USART/HSERIN
Coming back to this thread after recovering from some encoder/code porting issues from last week, I'm still trying to figure out the best way to send/receive data from 1 Master chip to 3-4 slaves via USART. I've read over many threads here regarding HSEROUT/HSERIN and the permutations & combinations leave me confused.
As of last night, I've got a PIC12F1840 sending the following on the Tx pin based on a rotary encoder turn (there's an IOC ISR to determine the direction of turn which sets RotEncDir):
The output on my LCD shows this for a CW turn:Code:DEFINE OSC 16 ' Set oscillator 16Mhz DEFINE HSER_TXSTA 20h ; Set transmit status and control register DEFINE HSER_BAUD 2400 ; Set baud rate DEFINE HSER_RCSTA 90h DEFINE HSER_CLROERR 1 ; Clear overrun error upon ; execution of every HSERIN ; command . . . Main: TOGGLE LED_0 If ValueDirty = 1 THEN ' Send RotEncDir to receiving chip ' Chip Id,Itm Id, <modifier>, "~" HSEROUT ["2", "3", SDEC RotEncDir, TxEndChar] ' use 'SDEC' if RotEncDir can be -1 for CCW ValueDirty = 0 ' Clear the flag #IFDEF USE_LCD_FOR_DEBUG HSEROUT [LCD_INST, LCD_CLR] pause 5 ' Chip Id,Itm Id, <modifier>, "~" HSEROUT ["2", "3", SDEC RotEncDir, TxEndChar] ' use 'SDEC' if RotEncDir can be -1 for CCW #ENDIF ENDIF pause 500 GOTO Main
and this for CCW (RotEncDir actually gets set to 0 but I change it to -1 as on the slave I want to just add this value:Code:231~
The first number represents the slave chip which is the intended target of the serial data (I'll have 2-3 slaves in this project). The second number represents what to change on that chip with the rotary encoder info. The next part is either '1' for CW or '-1' for CCW (I could go back to using '0' for CCW if that makes the overall serial data easier to interpret on the slaves).Code:23-1~
- Should I have a sync character at the start of the serial data so that on the slave I can determine if new serial data is sent before processing the first message (or there's an error)?
- Should I convert the HSEROUT line to multiple lines?
For the slaves, I've decided I need to use a Rx interrupt as I have other code running in the Main loop.
Code:DEFINE OSC 16 ' Set oscillator 16Mhz DEFINE HSER_TXSTA 20h ; Set transmit status and control register DEFINE HSER_BAUD 2400 ; Set baud rate DEFINE HSER_RCSTA 90h DEFINE HSER_CLROERR 1 ; Clear overrun error upon ; execution of every HSERIN ; command . . . ' *************************************************************** ' ASM Interrupt Definitions ' *************************************************************** ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler RX_INT, _UsartRx, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM ' Enable interrupt @ INT_ENABLE RX_INT ; USART Rx interrupt . . .
- Do I need to make the RX_INT a low priority interrupt, or is that only important if there are other time-sensitive interrupts (I am using SPWM_INT.bas for one slave)?
- As Henrik suggests above, should I make the serial data entirely consistent in terms of number of bytes to make the parsing here easier? If that's true, then I probably need to revert to using '0' for CCW rotary encoder changes.
- The code below is from DT on another thread but I can't see how the whole serial data (e.g. "231~" for slave chip #2 to increment item #3 by 1) will be pieced together.
- Does the ISR get 1 byte every time? i.e. the first time it goes into the above ISR, 'SerialData' will be "2" and then the next iteration will have "3"?
- Should the ISR have the ResetFlag set or not? I've seen both.
All slaves Rx pin will be connected to the master's Tx pin so each slave needs to determine if the serial data is for them or not (which the above code does).Code:'*********** 'ISR for RX_INT interrupt ************************************* Getbytes: HSERIN [Serialdata] ' Get the serial data IF Serialdata = SyncByte THEN ' if it's a Sync byte, IF Sync THEN ERROR = 1 ' last command was corrupted Sync = 1 ' indicate Sync was rcvd ForMe = 0 ' ID has not been rcvd ELSE IF Sync THEN IF !ForME THEN ' if we haven't rcvd the ID IF Serialdata = ID THEN ' and this byte matches the ID ForMe = 1 ' indicate ID rcvd ELSE Sync = 0 ' Not my packet ForMe = 0 ' reset receive state ENDIF ' and wait for next Sync ELSE CmdBuf = serialdata ' store the command IF CmdRcvd THEN LATE = 1 ' last command not finished CmdRcvd = 1 ' indicate a command was rcvd Sync = 0 ' reset receive state ForMe = 0 ENDIF ENDIF ENDIF @ INT_RETURN
Last edited by RossWaddell; - 18th March 2013 at 19:01.
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Re: Best way to use USART/HSERIN
I've modified Darrel's sample code from this thread (switching to use TMR1 - I couldn't get TMR0 to work) and hooked up my LabX1 board with a PIC16F877A chip jumpered to 4Mhz. It would appear to work except for when the SYNC character appears twice and depending on where it yields a different result.
I need to capture a 3rd byte (the adjustment to the command feature on the indicated chip) but something's not right - I get strange text in the receive window of the MCS serial window.Code:'::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: 'Based on Hserin with Darrel Taylor's Instant Interrupts '::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ' Program to echo incoming serial data. ' RX SYNC byte, if good: ChipID byte, if good: COMMAND, if good: ADJUSTMENT ' MPASM, LabX-1 , PBP2.47, Using PIC 16F877A @ 4mHz, 9600 Baud ' Using Hardware USART and MAX232 to MCS Serial Communicator on PC ' *************************************************************** ' >>>>>>>>>>>>>>>>> Slave IC ID: 1 <<<<<<<<<<<<<<<<<<<<<<< ' *************************************************************** ChipID CON "1" DEFINE OSC 4 DEFINE HSER_RCSTA 90h ' enable serial port, DEFINE HSER_TXSTA 24h ' enable transmit, DEFINE HSER_BAUD 9600 ' set baudrate to 9600 DEFINE HSER_CLOERR 1 ' automatic clear overrun error TRISD = %00000000 ' D to outputs for the LEDs TRISC = %10000000 ' PORTC.7 is the RX input, PORTC.6 is the TX output ADCON1 = %00001111 ' Set up ADCON1 register no matter what yr doing!!! '::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: INCLUDE "DT_INTS-14.bas" ' Base Interrupt System INCLUDE "ReEnterPBP.bas" ' Include if using PBP interrupts ;-- Place a copy of these variables in your Main program ------------------- ;-- The compiler will tell you which lines to un-comment -- ;-- Do Not un-comment these lines -- ;--------------------------------------------------------------------------- ;wsave VAR BYTE $20 SYSTEM ' location for W if in bank0 wsave VAR BYTE $70 SYSTEM ' alternate save location for W ' if using $70, comment wsave1-3 ' --- IF any of these three lines cause an error ?? ------------------------ ' Comment them out to fix the problem ---- ' -- Which variables are needed, depends on the Chip you are using -- wsave1 VAR BYTE $A0 SYSTEM ' location for W if in bank1 wsave2 VAR BYTE $120 SYSTEM ' location for W if in bank2 wsave3 VAR BYTE $1A0 SYSTEM ' location for W if in bank3 ' -------------------------------------------------------------------------- '::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ' Variable definition '::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: led0 var PORTD.0 led1 var PORTD.1 led2 var PORTD.2 led7 var PORTD.7 ERROR_LED VAR led7 ' rename the LED's LATE_LED VAR led2 HEART_LED VAR led0 LEDonDELAY CON 4 TxEndChar CON "~" SyncByte CON "S" CmdBuf VAR BYTE AdjBuf VAR BYTE SerialData VAR BYTE ERRORtime VAR BYTE LATEtime VAR BYTE HEARTtime VAR BYTE state VAR BYTE Sync VAR state.0 ' sync byte received ForMe VAR state.1 ' packet is for this device CmdRcvd VAR state.2 ' command has been received AdjRcvd VAR state.3 ' adjustment factor has been received ERROR VAR state.4 ' sync received out of order LATE VAR state.5 ' command received before last one was processed state = 0 ' Initialize default value ' *************************************************************** ' ASM Interrupt Definitions ' *************************************************************** ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, ReloadTMR1, ASM, no ; MUST be first INT_Handler TMR1_INT, _T1handler, PBP, yes INT_Handler RX_INT, _GetBytes, PBP, no endm INT_CREATE ; Creates the interrupt processor ENDASM ;--- Change these to match the desired interrupt frequency ------------------- ;--- See http://DarrelTaylor.com/DT_INTS-14/TimerTemplate.html for more Info. @Freq = 10 ; Frequency of Interrupts in Hz @Prescaler = 2 ; Timers Prescaler setting T1CON = $10 ; $30 = Prescaler 1:8, TMR1 OFF ; $00=1:1, $10=1:2, $20=1:4, $30=1:8 -- Must match @Prescaler value ' Enable interrupts @ INT_ENABLE RX_INT ; enable USART RX_INT interrupts @ INT_ENABLE TMR1_INT ; enable Timer 1 interrupts GOSUB StartTimer ; Start Timer 1 ('MotorRPM' will be saved on every ; interrupt if dirty Main: ; High HEART_LED ' Turn on LED connected to PORTD.0 ; Pause 500 ' Delay for .5 seconds ; Low HEART_LED ' Turn off LED connected to PORTD.0 ; Pause 500 ' Delay for .5 seconds IF (CmdRcvd AND AdjRcvd) THEN GOSUB ProcessCmdAdj ' Process any incomming data IF ERROR THEN ' if there's been an Error HIGH ERROR_LED ' Turn ON ERROR LED ERROR = 0 ' reset the error flag ERRORtime = LEDonDELAY ' start countdown till LED-OFF HSEROUT ["Error",13,10] ENDIF IF LATE THEN ' if command took too long HIGH LATE_LED ' Turn ON LATE LED LATE = 0 ' reset the LATE flag LATEtime = LEDonDELAY ' start countdown till LED-OFF HSEROUT ["Late",13,10] ENDIF GOTO Main '*********** Process received command ************************************** ProcessCmdAdj: hserout ["Cmd: ",CmdBuf, _ ' send ChipID, Command, Adjustment and CR/LF " [",DEC CmdBuf,"]",", Adj:",AdjBuf,_ " [",DEC AdjBuf,"]",13,10] ; hserout ["Cmd: ",CmdBuf, " [", _ ; DEC CmdBuf,"]",13,10] CmdRcvd = 0 ' indicate CMD & ADJ has been processed AdjRcvd = 0 RETURN ' *************************************************************** ' [TMR1_INT - interrupt handler] ' *************************************************************** T1handler: IF ERRORtime > 0 THEN ' if the Error LED is ON ERRORtime = ERRORtime - 1 ' decrement the count IF ERRORtime = 0 THEN ' when it reaches 0 LOW ERROR_LED ' turn the Error LED OFF ENDIF ENDIF IF LATEtime > 0 THEN ' if the LATE LED is ON LATEtime = LATEtime - 1 ' decrement the count IF LATEtime = 0 THEN ' when it reaches 0 LOW LATE_LED ' turn the LATE LED OFF ENDIF ENDIF HEARTtime = HEARTtime + 1 ' Toggle heartbeat ~.5sec IF HEARTtime = 7 THEN HEARTtime = 0 TOGGLE HEART_LED ENDIF @ INT_RETURN ' *************************************************************** ' [RX_INT - interrupt handler] ' *************************************************************** GetBytes: ' Henrik's suggestion (http://www.picbasic.co.uk/forum/showthread.php?t=17685) ' I'd probably send equally sized packets each time, perhaps something like sync, ' ID, 8 bytes of data, checksum. The slave then waits for the sync, grabs x ' number of bytes into an array, evaluates the checksum and if OK checks the ID. ' If ID matches it acts on the data otherwise it does nothing. ' Darrel Taylor's code (http://www.picbasic.co.uk/forum/showthread.php?t=9932&p=65066#post65066) HSERIN [Serialdata] ' Get the serial data IF Serialdata = SyncByte THEN ' if it's a Sync byte, IF Sync THEN ERROR = 1 ' last command was corrupted Sync = 1 ' indicate Sync was rcvd ForMe = 0 ' ID has not been rcvd ELSE IF Sync THEN IF !ForME THEN ' if we haven't rcvd the ID IF Serialdata = ChipID THEN' and this byte matches the ID ForMe = 1 ' indicate ID rcvd ELSE Sync = 0 ' Not my packet ForMe = 0 ' reset receive state ENDIF ' and wait for next Sync ELSEIF !CmdRcvd THEN CmdBuf = serialdata ' store the command IF CmdRcvd THEN LATE = 1 ' last command not finished CmdRcvd = 1 ' indicate a command was rcvd ;Sync = 0 ' reset receive state ;ForMe = 0 ELSE AdjBuf = SerialData ' store the command IF AdjRcvd THEN LATE = 1 ' last adjustment not finished AdjRcvd = 1 ' indicate an adjustment was rcvd Sync = 0 ' reset receive state ForMe = 0 ENDIF ENDIF ENDIF @ INT_RETURN ;---[TMR1 reload - interrupt handler]----------------------------------------- ASM ; Calculate Timer Reload Constant ReloadInst = 8 ; # of Intructions used to reload timer if ((Prescaler == 1)||(Prescaler == 2)||(Prescaler == 4)||(Prescaler == 8)) MaxCount = 65536 + (ReloadInst / Prescaler) TimerReload = MaxCount - (OSC*1000000/4/Prescaler/Freq) if ((TimerReload < 0) || (TimerReload > (65535-ReloadInst))) error Invalid Timer Values - check "OSC", "Freq" and "Prescaler" endif else error Invalid Prescaler endif ENDASM @Timer1 = TMR1L ; map timer registers to a word variable Timer1 VAR WORD EXT TimerReload CON EXT ; Get the External Constant TMR1ON VAR T1CON.0 ; Alias the Timers ON/OFF bit ;---Reload Timer1------ ASM ReloadTMR1 MOVE?CT 0, T1CON, TMR1ON ; 1 stop timer MOVLW LOW(TimerReload) ; 1 Add TimerReload to the ADDWF TMR1L,F ; 1 value in Timer1 BTFSC STATUS,C ; 1/2 INCF TMR1H,F ; 1 MOVLW HIGH(TimerReload) ; 1 ADDWF TMR1H,F ; 1 MOVE?CT 1, T1CON, TMR1ON ; 1 start timer INT_RETURN ENDASM ;---Start/Stop controls ----- StartTimer: Timer1 = TimerReload ; Load Timer TMR1ON = 1 ; start timer RETURN StopTimer: TMR1ON = 0 ; stop timer RETURN
Serial window config:
Proper sequence yields correct result:
Correct error msg:
Weird error msg:
Weird error msg 2:
On a side note, any idea why some of the LEDs in the bargraph light up when they're not supposed to? Seems like every time I plug in the Lab X1, different ones light up.
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Re: Best way to use USART/HSERIN
The 2 LEDs which are on when they shouldn't be are still perplexing me, but this code works now if anyone's interested:
Any suggestions for improvement gratefully appreciated.Code:' ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ' Based on Hserin with Darrel Taylor's Instant Interrupts ' ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ' MPASM, LabX-1 , PBP3, Using PIC 16F877A @ 4mHz, 9600 Baud, ' USART and MAX232 to MCS Serial Communicator on PC ' *************************************************************** ' >>>>>>>>>>>>>>>>> Slave IC ID: 1 <<<<<<<<<<<<<<<<<<<<<<< ' *************************************************************** ThisChipID CON "1" DEFINE OSC 4 DEFINE HSER_RCSTA 90h ' enable serial port, DEFINE HSER_TXSTA 24h ' enable transmit, DEFINE HSER_BAUD 9600 ' set baudrate to 9600 DEFINE HSER_CLOERR 1 ' automatic clear overrun error TRISD = %00000000 ' D to outputs for the LEDs TRISC = %10000000 ' PORTC.7 is the RX input, PORTC.6 is the TX output ADCON1 = %00001111 ' Set up ADCON1 register no matter what yr doing!!! '::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: INCLUDE "DT_INTS-14.bas" ' Base Interrupt System INCLUDE "ReEnterPBP.bas" ' Include if using PBP interrupts ;-- Place a copy of these variables in your Main program ------------------- ;-- The compiler will tell you which lines to un-comment -- ;-- Do Not un-comment these lines -- ;--------------------------------------------------------------------------- ;wsave VAR BYTE $20 SYSTEM ' location for W if in bank0 wsave VAR BYTE $70 SYSTEM ' alternate save location for W ' if using $70, comment wsave1-3 ' --- IF any of these three lines cause an error ?? ------------------------ ' Comment them out to fix the problem ---- ' -- Which variables are needed, depends on the Chip you are using -- wsave1 VAR BYTE $A0 SYSTEM ' location for W if in bank1 wsave2 VAR BYTE $120 SYSTEM ' location for W if in bank2 wsave3 VAR BYTE $1A0 SYSTEM ' location for W if in bank3 ' -------------------------------------------------------------------------- ' *************************************************************** ' ASM Interrupt Definitions ' *************************************************************** ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, ReloadTMR1, ASM, no ; MUST be first INT_Handler TMR1_INT, _T1handler, PBP, yes INT_Handler RX_INT, _GetBytes, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM '::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ' Variable definition '::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: led0 var PORTD.0 led1 var PORTD.1 led2 var PORTD.2 led7 var PORTD.7 ERROR_LED VAR led7 ' rename the LED's LATE_LED VAR led2 HEART_LED VAR led0 LEDonDELAY CON 4 TxEndChar CON "~" SyncByte CON "S" SerialData VAR BYTE CmdVal VAR BYTE AdjVal VAR BYTE ERRORtime VAR BYTE LATEtime VAR BYTE HEARTtime VAR BYTE state VAR BYTE SyncRcvd VAR state.0 ' sync byte received ForMe VAR state.1 ' packet is for this device CmdRcvd VAR state.2 ' command has been received AdjRcvd VAR state.3 ' adjustment factor has been received MsgRcvd VAR state.4 ' compelte message received ERROR VAR state.5 ' sync received out of order LATE VAR state.6 ' command received before last one was processed SyncIndx VAR state.7 ' index # of incoming byte state = 0 ' Initialize default values cmdVal = 0 AdjVal = 0 serialdata = 0 ' message sample: "S3B1~" ;--- Change these to match the desired interrupt frequency ------------------- ;--- See http://DarrelTaylor.com/DT_INTS-14/TimerTemplate.html for more Info. @Freq = 10 ; Frequency of Interrupts in Hz @Prescaler = 2 ; Timers Prescaler setting T1CON = $10 ; $30 = Prescaler 1:8, TMR1 OFF ; $00=1:1, $10=1:2, $20=1:4, $30=1:8 -- Must match @Prescaler value ' Enable interrupts @ INT_ENABLE RX_INT ; enable USART RX_INT interrupts @ INT_ENABLE TMR1_INT ; enable Timer 1 interrupts GOSUB StartTimer ; Start Timer 1 ('MotorRPM' will be saved on every ; interrupt if dirty Main: IF MsgRcvd THEN GOSUB ProcessCmdAdj ' Process incomming data IF ERROR THEN ' if there's been an Error HIGH ERROR_LED ' Turn ON ERROR LED ERROR = 0 ' reset the error flag ERRORtime = LEDonDELAY ' start countdown till LED-OFF HSEROUT ["Error",13,10] HSEROUT ["SyncRcvd: ", DEC SyncRcvd,", SyncIndx: ",DEC SyncIndx, _ ", ForMe: ", DEC ForMe,", CmdRcvd: ",DEC CmdRcvd, _ ", AdjRcvd: ",DEC AdjRcvd,", Cmd: ",CmdVal, ", Adj: ",DEC AdjVal,13,10] ENDIF IF LATE THEN ' if command took too long HIGH LATE_LED ' Turn ON LATE LED LATE = 0 ' reset the LATE flag LATEtime = LEDonDELAY ' start countdown till LED-OFF HSEROUT ["Late",13,10] ENDIF GOTO Main '*********** Process received command ************************************** ProcessCmdAdj: HSEROUT ["Cmd: ", CmdVal, _ ' send ThisChipID, Command, Adjustment and CR/LF ", Adj: ",AdjVal,_ " [",DEC AdjVal,"]",13,10] state = 0 ' indicate CMD & ADJ has been processed cmdVal = 0 AdjVal = 0 RETURN ' *************************************************************** ' [TMR1_INT - interrupt handler] ' *************************************************************** T1handler: IF ERRORtime > 0 THEN ' if the Error LED is ON ERRORtime = ERRORtime - 1 ' decrement the count IF ERRORtime = 0 THEN ' when it reaches 0 LOW ERROR_LED ' turn the Error LED OFF ENDIF ENDIF IF LATEtime > 0 THEN ' if the LATE LED is ON LATEtime = LATEtime - 1 ' decrement the count IF LATEtime = 0 THEN ' when it reaches 0 LOW LATE_LED ' turn the LATE LED OFF ENDIF ENDIF HEARTtime = HEARTtime + 1 ' Toggle heartbeat ~.5sec IF HEARTtime = 7 THEN HEARTtime = 0 TOGGLE HEART_LED ENDIF @ INT_RETURN ' *************************************************************** ' [RX_INT - interrupt handler] ' *************************************************************** GetBytes: ' Darrel Taylor's code (http://www.picbasic.co.uk/forum/showthread.php?t=9932&p=65066#post65066) HSERIN [Serialdata] ' Get the serial data (guaranteed here to have at IF Serialdata = SyncByte THEN IF SyncRcvd THEN ' if it's a Sync byte, state = 0 ' last command was corrupted; reset 'state' ERROR = 1 ' and indicate error ENDIF SyncRcvd = 1 ' indicate Sync was rcvd ELSE IF SyncRcvd THEN IF !ForMe THEN ' if we haven't rcvd the ID IF Serialdata = ThisChipID THEN 'and this byte matches the ID ForMe = 1 ' indicate ID rcvd ELSE state = 0 ' and wait for next Sync ENDIF ELSEIF !CmdRcvd THEN CmdVal = SerialData CmdRcvd = 1 ELSEIF !AdjRcvd THEN AdjVal = SerialData AdjRcvd = 1 ELSEIF !MsgRcvd THEN If SerialData = TxEndChar THEN MsgRcvd = 1 ENDIF ENDIF ENDIF ENDIF @ INT_RETURN ;---[TMR1 reload - interrupt handler]----------------------------------------- ASM ; Calculate Timer Reload Constant ReloadInst = 8 ; # of Intructions used to reload timer if ((Prescaler == 1)||(Prescaler == 2)||(Prescaler == 4)||(Prescaler == 8)) MaxCount = 65536 + (ReloadInst / Prescaler) TimerReload = MaxCount - (OSC*1000000/4/Prescaler/Freq) if ((TimerReload < 0) || (TimerReload > (65535-ReloadInst))) error Invalid Timer Values - check "OSC", "Freq" and "Prescaler" endif else error Invalid Prescaler endif ENDASM @Timer1 = TMR1L ; map timer registers to a word variable Timer1 VAR WORD EXT TimerReload CON EXT ; Get the External Constant TMR1ON VAR T1CON.0 ; Alias the Timers ON/OFF bit ;---Reload Timer1------ ASM ReloadTMR1 MOVE?CT 0, T1CON, TMR1ON ; 1 stop timer MOVLW LOW(TimerReload) ; 1 Add TimerReload to the ADDWF TMR1L,F ; 1 value in Timer1 BTFSC STATUS,C ; 1/2 INCF TMR1H,F ; 1 MOVLW HIGH(TimerReload) ; 1 ADDWF TMR1H,F ; 1 MOVE?CT 1, T1CON, TMR1ON ; 1 start timer INT_RETURN ENDASM ;---Start/Stop controls ----- StartTimer: Timer1 = TimerReload ; Load Timer TMR1ON = 1 ; start timer RETURN StopTimer: TMR1ON = 0 ; stop timer RETURN
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Re: Best way to use USART/HSERIN
Did you set the pull-up/down jumper for the Lab X1 LEDs?
I remember I had to set "something".
Robert
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Re: Best way to use USART/HSERIN
No, I didn't Robert. Do I need to do that for all of them?
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Re: Best way to use USART/HSERIN
Check the Lab X1 schematic, I'm pretty sure there was a jumper for this. It handled all the LEDs at once.
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