Elapsed timer not working as expected at 64MHz
Has anyone else had problems using DT's Elapsed Timer at 64MHz?
When I run a 18F44K22 at 64MHz, 99 TICKS = .247 second.
When I run at 16MHz, 99 TICKS = .988 second.
It's as if the timer runs at a default 16MHz when the PIC is at 64MHz (exactly 1/4 speed).
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working at 64MHz
When I look at Elapsed Timer include, Darryl has adjusted it to run at any oscillator frequency.
The only thing that caught my eye was the TimerConst calculation. At 64MHz it is 160,000 on the first loop, well beyond the range of a WORD variable.Code:'*************************************************************************** '* Name : Elapsed_INT-18.bas * '* Author : Darrel Taylor * '* Date : JUL 11, 2006 : 7/11/2010 * '* Version : 1.2 * '* Notes : Must have DT_INTS-18.bas loaded first * '* ver 1.2: Now works at any OSC frequency without using the prescaler * '*************************************************************************** DISABLE DEBUG ; syntax = Handler IntSource, Label, Type, ResetFlag? DEFINE Elapsed_Handler TMR1_INT, _ClockCount, asm, yes ; the above define can be used in the INT_LIST macro, if desired (optional) Ticks VAR BYTE ; Counts timer Overflows T1Post VAR BYTE ; Timer1 postscaler Seconds VAR BYTE Minutes VAR BYTE Hours VAR BYTE Days VAR WORD SecondsChanged VAR BIT ; idicates that the value has changed MinutesChanged VAR BIT HoursChanged VAR BIT DaysChanged VAR BIT GOSUB ResetTime ; initialize the Elapsed Timer Goto OverElapsed ; skip over the routines ' -------------- calc timer reload Constants ------------------------------- ASM T1PS = 1 ; start with 1:1 postscaler TimerConst = ((OSC*1000000)/4/100) ; how many timer ticks will it take while TimerConst > 65400 ; if it's more than the timer can count T1PS = T1PS * 2 ; double the postscaler TimerConst = TimerConst / 2 ; halve the count endw TimerConst = 65536 - TimerConst + 8 ; final reload value ; ----------------- ADD TimerConst to TMR1H:TMR1L ------------------------- ADD2_TIMER macro BCF T1CON,TMR1ON, 0 ; 1 Turn off timer MOVLW LOW(TimerConst) ; 1 ADDWF TMR1L,F, 0 ; 1 BTFSC STATUS,C ; 1/2 INCF TMR1H,F, 0 ; 1 MOVLW HIGH(TimerConst) ; 1 ADDWF TMR1H,F, 0 ; 1 endm ; ----------------- ADD TimerConst to TMR1H:TMR1L and restart TIMER1 ------ RELOAD_TIMER macro ADD2_TIMER BSF T1CON,TMR1ON, 0 ; 1 Turn TIMER1 back on (8 cycles) endm ; ----------------- Load TimerConst into TMR1H:TMR1L ---------------------- LOAD_TIMER macro MOVE?CT 0, T1CON,TMR1ON MOVE?CB 0, TMR1L MOVE?CB 0, TMR1H ADD2_TIMER endm ENDASM ' ------[ This is the Interrupt Handler ]----------------------------------- T1PS CON EXT ClockCount: @ RELOAD_TIMER ; Reload TIMER1 Ticks = Ticks + 1 IF Ticks = 100 THEN Ticks = 0 T1Post = T1Post + 1 IF T1Post = T1PS THEN T1Post = 0 Seconds = Seconds + 1 SecondsChanged = 1 IF Seconds = 60 THEN Seconds = 0 Minutes = Minutes + 1 MinutesChanged = 1 ENDIF IF Minutes = 60 THEN Minutes = 0 Hours = Hours + 1 HoursChanged = 1 ENDIF IF Hours = 24 THEN Days = Days + 1 DaysChanged = 1 Hours = 0 ENDIF ENDIF ENDIF @ INT_RETURN ; Restore context and return from interrupt '-----====[ END OF TMR1 Interrupt Handler ]====----------------------------- StartTimer: T1CON = 1 ; 1:1, FOSC4, TMR1ON RETURN ; -------------------------------------------------------------------------- StopTimer: T1CON.0 = 0 ; Turn OFF Timer1 RETURN ; -------------------------------------------------------------------------- BitSave VAR BIT ResetTime: BitSave = T1CON.0 ; Save TMR1ON bit @ LOAD_TIMER ; Load TimerConst T1CON.0 = BitSave ; Restore TMR1ON bit T1Post = 0 ; clear the postscaler Ticks = 0 Seconds = 0 Minutes = 0 Hours = 0 Days = 0 SecondsChanged = 1 ; indicate everything has changed MinutesChanged = 1 ; so that 00:00:00 is processed HoursChanged = 1 DaysChanged = 1 RETURN OverElapsed: ENABLE DEBUG
I don't have LONGs enabled right now. I can't seem to find the definition for TimerConst to see if it's a WORD or LONG.
It should be a WORD 'cause he ends up moving the high and low bytes.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working at 64MHz
Hi Robert,
The first piece of code is executed by the assembler at the time the code is built. It doesn't execute when the PIC actually runs so there's no WORD size limit at play as far as I know.
The second piece you've marked in red is of course run time code but by the TimerConst should be less than 65400 so no problem.
With that said something is apparently not working as expected. Darrels code, relies on you having DEFINE OSC xx correctly. It's easy enough to have a 16MHz clock with the corresponding DEFINE and then enable the PLL to get 64MHz but forget to change to DEFINE OSC 64.
/Henrik.
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Re: Elapsed timer not working at 64MHz
I bet this is my Saleae probe biting me in the nose again; not being able to run it fast enough.
The interrupt is working faster, I'm probably missing signals.
EDIT: And I notice I didn't align the marker the same way on Probe 1 - Port = 1 / 0, but it's the same interval as described in the WIDTH; 0.250uS, I just rechecked.
Code:asm ; __CONFIG _CONFIG1H, _FOSC_INTIO67_1H & _PLLCFG_OFF_1H & _PRICLKEN_OFF_1H & _FCMEN_ON_1H & _IESO_OFF_1H __CONFIG _CONFIG1H, _FOSC_INTIO67_1H & _PLLCFG_ON_1H & _PRICLKEN_OFF_1H & _FCMEN_ON_1H & _IESO_OFF_1H __CONFIG _CONFIG2L, _PWRTEN_ON_2L & _BOREN_SBORDIS_2L & _BORV_285_2L __CONFIG _CONFIG2H, _WDTEN_OFF_2H __CONFIG _CONFIG3H, _CCP2MX_PORTC1_3H & _PBADEN_OFF_3H & _CCP3MX_PORTE0_3H & _HFOFST_OFF_3H & _T3CMX_PORTB5_3H & _P2BMX_PORTC0_3H & _MCLRE_EXTMCLR_3H __CONFIG _CONFIG4L, _STVREN_OFF_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L endasm ;DEFINE OSC 16 ;OSCTUNE = %10000000 DEFINE OSC 64 OSCTUNE = %11000000 OSCCON = %01110000 OSCCON2 = %00000100 INCLUDE "DT_INTS-18.bas" INCLUDE "ReEnterPBP-18.bas" INCLUDE "ReEnterPBP-18LP.bas" INCLUDE "Elapsed_INT-18.bas" ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? ; INT_Handler RX1_INT, _RX1Interrupt, PBP, yes endm INT_CREATE ; Creates the interrupt processor INT_LIST_L macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, _ClockCount, PBP, yes endm INT_CREATE_L ; Creates the Low Priority interrupt processor ENDASM ANSELA = %00000000 ANSELB = %00000000 ANSELC = %00000000 ANSELD = %00000000 ANSELE = %00000000 ADCON0 = %00000000 PMD0 = %10111110 PMD1 = %11011111 PMD2 = %00001111 DEFINE USE_LOWPRIORITY 1 TRISA = %00000000 TRISB = %00000000 TRISC = %00000000 TRISD = %00000000 TRISE = %00000000 PORTA = %00000000 PORTB = %00000000 PORTC = %00000000 PORTD = %00000000 PORTE = %00000000 pause 100 @ INT_ENABLE TMR1_INT ; enable Timer 1 interrupts GOSUB ResetTime ' Reset Time to 0d-00:00:00.00 MainProgram: PortD.2 = 1 if T1CON.0 = 0 then GOSUB StartTimer ' Start the Elapsed Timer PortD.3 = 1 endif PortD.2 = 0 if ticks = 25 then PortD.3 = 0 GOSUB StopTimer ' Stop the Elapsed Timer GOSUB ResetTime ' Reset Time to 0d-00:00:00.00 endif goto MainProgram end
Switch bouncing becomes much more pronounced at 64MHz. I think I'm going to change approach and go the long way and use just a 0.1uF ceramic cap on each pin (I remember that helped somewhat on previous tests).
Master PIC @ 64MHz
LED Slave PIC @ 64MHz
Keypad Slave PIC at 16MHz
I start DT Timer on a keypress and ignore inputs during that interval. I just have to make tests to see how fast I can press the same button and tweak the delay.
I wanted to handle both the LEDs and Keypad on the same PIC, but it'll be a lot easier and reliable to just split them up.
Last edited by Demon; - 22nd December 2014 at 21:05.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working at 64MHz
So I minimized the code:
5 TICK TimerCode:asm __CONFIG _CONFIG1H, _FOSC_INTIO67_1H & _PLLCFG_ON_1H & _PRICLKEN_OFF_1H & _FCMEN_ON_1H & _IESO_OFF_1H __CONFIG _CONFIG2L, _PWRTEN_ON_2L & _BOREN_SBORDIS_2L & _BORV_285_2L __CONFIG _CONFIG2H, _WDTEN_OFF_2H __CONFIG _CONFIG3H, _CCP2MX_PORTC1_3H & _PBADEN_OFF_3H & _CCP3MX_PORTE0_3H & _HFOFST_OFF_3H & _T3CMX_PORTB5_3H & _P2BMX_PORTC0_3H & _MCLRE_EXTMCLR_3H __CONFIG _CONFIG4L, _STVREN_OFF_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L endasm DEFINE OSC 16 OSCCON = %01010000 ' R/W 111 = HFINTOSC – (16 MHz) ' 110 = HFINTOSC/2 – (8 MHz) ' 101 = HFINTOSC/4 – (4 MHz) OSCTUNE = %11000000 OSCCON2 = %00000100 INCLUDE "DT_INTS-18.bas" INCLUDE "ReEnterPBP-18.bas" INCLUDE "Elapsed_INT-18.bas" ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, _ClockCount, PBP, yes endm INT_CREATE ENDASM ANSELA = %00000000 ANSELB = %00000000 ANSELC = %00000000 ANSELD = %00000000 ANSELE = %00000000 ADCON0 = %00000000 TRISA = %00000000 TRISB = %00000000 TRISC = %00000000 TRISD = %00000000 TRISE = %00000000 PORTA = %00000000 PORTB = %00000000 PORTC = %00000000 PORTD = %00000000 PORTE = %00000000 pause 100 @ INT_ENABLE TMR1_INT GOSUB ResetTime MainProgram: if T1CON.0 = 0 then PortD.3 = 1 GOSUB StartTimer endif if ticks = 5 then PortD.3 = 0 GOSUB StopTimer ' Stop the Elapsed Timer GOSUB ResetTime ' Reset Time to 0d-00:00:00.00 endif goto MainProgram end
OSC 16MHz (4MHz+PLL) 50ms
OSC 32MHz (8MHz+PLL) 25ms
OSC 64MHz (16MHz+PLL) 12.5ms
I can't help but feel I'm doing something wrong, it's just too proportional a variance. If the Saleae probe would miss pulses, there wouldn't be a regular pattern.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
debug T1PS and TimerConst to see what's going on would be a good start
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Re: Elapsed timer not working as expected at 64MHz
Roger, oveur.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
tips value will be 4 at 64mhz , i played a lot with this elasped timer code , for up down timer
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Re: Elapsed timer not working as expected at 64MHz
for 64mhz
each tick should be 2.5ms , to confirm the internal osc trim i enable a i/o pin to check its pulse per tick rate , it not the best way but it showed me that the most the time the internal osc needed some adj to ensure that it was as close as possable to 2.5ms
here is a snip of modifed code for the timer, i left the asm as it stands, but cos i wanted the 100th sec reading and the same structure of code , i changed / removed the t1post varable and used the MOD
Code:EL_Ticks = EL_Ticks + 1 ; each tick is 2.5ms ' IF LATG.0 = 0 THEN ' debug ' LATG.0 = 1 ' ELSE ' LATG.0 = 0 ' ENDIF if EL_ticks // T1PS = 0 THEN ' if modulas of tips (4) = 0 ' IF LATG.0 = 0 THEN ' debug ' LATG.0 = 1 ' ELSE ' LATG.0 = 0 ' ENDIF EL_100th = EL_100th + 1 EL_100thChanged = 1 IF EL_100TH = 100 THEN EL_100TH = 0 EL_Seconds = EL_Seconds + 1 EL_SecondsChanged = 1 IF EL_Seconds = 60 THEN EL_Seconds = 0 EL_Minutes = EL_Minutes + 1 EL_MinutesChanged = 1 eNDIF IF EL_Minutes = 60 THEN EL_Minutes = 0 EL_Hours = EL_Hours + 1 EL_HoursChanged = 1 ENDIF IF EL_Hours = 24 THEN EL_Hours = 0 EL_Days = EL_Days + 1 EL_DaysChanged = 1 ENDIF eNDIF endif
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Re: Elapsed timer not working as expected at 64MHz
each 100th is 10ms on the i/o debug section btw
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Re: Elapsed timer not working as expected at 64MHz
Code:OSCTUNE = %01000111 ' Bit 7 - INTSRC - internal LF Source Select 1 = 31.25 from 16Mhz Internal /512 HF-INTOSC ) 0 = Internal 31khz OSC ' Bit 6 - PLLEN - 1 PLL enabled , 0 = PLL disabled ' Bits 5-0 Frequancy callibaration 00000 = centre Frq - FREQ ADJ = 5-7 ( the higher the number the slower the osc timing )
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Re: Elapsed timer not working as expected at 64MHz
I started by making my version of the Elapsed include and adding 2 variables at the end of the timer calc:Originally Posted by richard
Before Main of my program I added:Code:... ' -------------- calc timer reload Constants ------------------------------- ASM T1PS = 1 ; start with 1:1 postscaler TimerConst = ((OSC*1000000)/4/100) ; how many timer ticks will it take while TimerConst > 65400 ; if it's more than the timer can count T1PS = T1PS * 2 ; double the postscaler TimerConst = TimerConst / 2 ; halve the count endw TimerConst = 65536 - TimerConst + 8 ; final reload value ; ---------------------------- DEBUG SCALER -------------------------------- DebugT1PS = T1PS DebugTC = TimerConst ; xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ...
Right now I'm wiring up a LCD to display the 2 variables.Code:DebugT1PS CON EXT DebugTC CON EXT
Am I on the right track to look at them?
I've never tried to display something from inside Darryl's includes before. My plan was to copy them into 2 words and then displaying the lower and upper bytes on the LCD.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
probably not if yours fails try thisAm I on the right track to look at them?
Code:DISABLE DEBUG ; syntax = Handler IntSource, Label, Type, ResetFlag? DEFINE Elapsed_Handler TMR1_INT, _ClockCount, asm, yes ; the above define can be used in the INT_LIST macro, if desired (optional) Ticks VAR BYTE ; Counts timer Overflows T1Post VAR BYTE ; Timer1 postscaler Seconds VAR BYTE Minutes VAR BYTE Hours VAR BYTE Days VAR WORD DebugT1PS var byte DebugTCL var byte DebugTCh var byte SecondsChanged VAR BIT ; idicates that the value has changed MinutesChanged VAR BIT HoursChanged VAR BIT DaysChanged VAR BIT GOSUB ResetTime ; initialize the Elapsed Timer Goto OverElapsed ; skip over the routines ' -------------- calc timer reload Constants ------------------------------- ASM T1PS = 1 ; start with 1:1 postscaler TimerConst = ((OSC*1000000)/4/100) ; how many timer ticks will it take while TimerConst > 65400 ; if it's more than the timer can count T1PS = T1PS * 2 ; double the postscaler TimerConst = TimerConst / 2 ; halve the count endw TimerConst = 65536 - TimerConst + 8 ; final reload value _DebugT1PS =T1PS _DebugTCH=TimerConst /256 _DebugTCL = TimerConst - _DebugTCH*256 ; ----------------- ADD TimerConst to TMR1H:TMR1L ------------------------- ADD2_TIMER macro
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Re: Elapsed timer not working as expected at 64MHz
Actually, it worked.
I deleted my debug include 'cause I can work without it.
And I get:Code:... ;T1PS CON EXT ' Already defined in include TimerConst CON EXT varT1PS var word varTC var word varT1PS = T1PS varTC = TimerConst Lcdout $fe, 1, "Timer 1" Lcdout $fe, $94, "PS:", BIN8 varT1PS.byte1, " ", BIN8 varT1PS.byte0 Lcdout $fe, $D4, "TC:", BIN8 varTC.byte1, " ", BIN8 varTC.byte0 MainProgram:
PS:00000000 00000001
TC:01100011 11001000 <--- Dec=25544
EDIT: Woooops, still using OSC 16, BRB.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
OSC 64 (16 + PLL)
PS:00000000 00000100 <--- Dec=4
TC:01100011 11001000 <--- Dec=25544
I had same results manually this afternoon.
Robert
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
ok next whats in T1CON ?
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Re: Elapsed timer not working as expected at 64MHz
Looking at the datasheet for 18F44K22, timer 1 has a 2 bit prescaler.
4 (100) takes 3 bits.
Gonna try timer 2.
...
13.0 TIMER2/4/6 MODULE p.175
...
• 8-bit Timer and Period registers (TMRx and PRx,
respectively)
• Readable and writable (both registers)
• Software programmable prescaler (1:1, 1:4, 1:16)
• Software programmable postscaler (1:1 to 1:16)
...
EDIT: Darn, DT Elapsed include only has Timer1...
Robert
Last edited by Demon; - 23rd December 2014 at 03:31.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
Was looking at T1CON register and noticed this:
So that is 2 bits.TxCKPS<1:0>: Timer1/3/5 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
T1CON=00000000Code:bit 7-6 TMRxCS<1:0>: Timer1/3/5 Clock Source Select bits 11 =Reserved. Do not use. 10 =Timer1/3/5 clock source is pin or oscillator: If TxSOSCEN = 0: External clock from TxCKI pin (on the rising edge) If TxSOSCEN = 1: Crystal oscillator on SOSCI/SOSCO pins 01 =Timer1/3/5 clock source is system clock (FOSC) 00 =Timer1/3/5 clock source is instruction clock (FOSC/4) bit 5-4 TxCKPS<1:0>: Timer1/3/5 Input Clock Prescale Select bits 11 = 1:8 Prescale value 10 = 1:4 Prescale value 01 = 1:2 Prescale value 00 = 1:1 Prescale value bit 3 TxSOSCEN: Secondary Oscillator Enable Control bit 1 = Dedicated Secondary oscillator circuit enabled 0 = Dedicated Secondary oscillator circuit disabled bit 2 TxSYNC: Timer1/3/5 External Clock Input Synchronization Control bit TMRxCS<1:0> = 1X 1 = Do not synchronize external clock input 0 = Synchronize external clock input with system clock (FOSC) TMRxCS<1:0> = 0X This bit is ignored. Timer1/3/5 uses the internal clock when TMRxCS<1:0> = 1X. bit 1 TxRD16: 16-Bit Read/Write Mode Enable bit 1 = Enables register read/write of Timer1/3/5 in one 16-bit operation 0 = Enables register read/write of Timer1/3/5 in two 8-bit operation bit 0 TMRxON: Timer1/3/5 On bit 1 = Enables Timer1/3/5 0 = Stops Timer1/3/5 Clears Timer1/3/5 Gate flip-flop
Robert
Last edited by Demon; - 23rd December 2014 at 03:42.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
ITS NOT using the prescaler those bits need to be 00 ie 1:1
@64mhz with a preload of 25544 you get a tmr1 int every 2.5mS dt's int routine inc's the tips counter till its 4 then inc's the elapsed time clock I count ie once every 10mS
next step after confirming t1con is ok is to toggle a pin in the int routine as per what Sheldon suggested and verify 2.5mS ints are occurring
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Re: Elapsed timer not working as expected at 64MHz
In the Elapsed include:
Darryl talks about a post-scaler. Timers 1, 3 and 5 have none for a 18F44K22?Code:... ' -------------- calc timer reload Constants ------------------------------- ASM T1PS = 1 ; start with 1:1 postscaler TimerConst = ((OSC*1000000)/4/100) ; how many timer ticks will it take while TimerConst > 65400 ; if it's more than the timer can count T1PS = T1PS * 2 ; double the postscaler TimerConst = TimerConst / 2 ; halve the count endw TimerConst = 65536 - TimerConst + 8 ; final reload value ...
Neither does Timer 0, only Timers 2,4 and 6 have pre and post-scalers.
Robert
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
t1con looks good should be 0 or 1 (on or off) depending on what the int routine is up to
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Re: Elapsed timer not working as expected at 64MHz
hence the T1PS VARDarryl talks about a post-scaler. Timers 1, 3 and 5 have none for a 18F44K22?
Neither does Timer 0, only Timers 2,4 and 6 have pre and post-scalers
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Re: Elapsed timer not working as expected at 64MHz
for DT's elasped timer , i dont setup timer 1 at all
Code:'Note: Programming the T1GCON prior to T1CON is recommended T1GCON = %00000000 ' Timer 1 Gate Control bit7 0= counts regardless of gate 1 = gates in use , bit6 gate active when 1= High ,0=low ' bit5 0= toggle mode diabled 1= enabled bit4 single pulse mode 1- en 0= dis, bit 2 -status bit,1-0 - gate source sel ' 1 T1CON = %00000000 ' Timer 1 ,bit7-6 = TMR1 CLK source 00 = Instuction Clk(Fosc/4),01 =sys clk,10=ext clk,11=cap sense osc ' bit5-4 = TMR1 prescale 00= 1:1 ,bit3=0 LP off,bit2=1 no sync ext CLK ,bit1= 0 n/a,Bit0=0 Timer 1 on/off TMR1H = 0 ' CLEAR TMR1H MODULE REGISTER TMR1L = 0 ' CLEAR TMR1L MODULE REGISTER
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Re: Elapsed timer not working as expected at 64MHz
I just noticed dt's ass code makes it impossible to stuff the t1con up it sets it to 0 anyway no matter what you may try to set it to . but worth checking anyway I suppose
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Re: Elapsed timer not working as expected at 64MHz
My output pin changes state every 2.5ms at 64MHz.
Code:'*************************************************************************** '* Name : Elapsed_INT-18.bas * '* Author : Darrel Taylor * '* Date : JUL 11, 2006 : 7/11/2010 * '* Version : 1.2 * '* Notes : Must have DT_INTS-18.bas loaded first * '* ver 1.2: Now works at any OSC frequency without using the prescaler * '*************************************************************************** DISABLE DEBUG ; syntax = Handler IntSource, Label, Type, ResetFlag? DEFINE Elapsed_Handler TMR1_INT, _ClockCount, asm, yes ; the above define can be used in the INT_LIST macro, if desired (optional) EL_Ticks VAR BYTE ; Counts timer Overflows EL_100th VAR BYTE ;T1Post VAR BYTE ; Timer1 postscaler EL_Seconds VAR BYTE EL_Minutes VAR BYTE EL_Hours VAR BYTE EL_Days VAR WORD EL_100thChanged VAR BIT EL_SecondsChanged VAR BIT ; idicates that the value has changed EL_MinutesChanged VAR BIT EL_HoursChanged VAR BIT EL_DaysChanged VAR BIT GOSUB ResetTime ; initialize the Elapsed Timer Goto OverElapsed ; skip over the routines ' -------------- calc timer reload Constants ------------------------------- ASM T1PS = 1 ; start with 1:1 postscaler TimerConst = ((OSC*1000000)/4/100) ; how many timer ticks will it take while TimerConst > 65400 ; if it's more than the timer can count T1PS = T1PS * 2 ; double the postscaler TimerConst = TimerConst / 2 ; halve the count endw TimerConst = 65536 - TimerConst + 8 ; final reload value ; ----------------- ADD TimerConst to TMR1H:TMR1L ------------------------- ADD2_TIMER macro BCF T1CON,TMR1ON, 0 ; 1 Turn off timer MOVLW LOW(TimerConst) ; 1 ADDWF TMR1L,F, 0 ; 1 BTFSC STATUS,C ; 1/2 INCF TMR1H,F, 0 ; 1 MOVLW HIGH(TimerConst) ; 1 ADDWF TMR1H,F, 0 ; 1 endm ; ----------------- ADD TimerConst to TMR1H:TMR1L and restart TIMER1 ------ RELOAD_TIMER macro ADD2_TIMER BSF T1CON,TMR1ON, 0 ; 1 Turn TIMER1 back on (8 cycles) endm ; ----------------- Load TimerConst into TMR1H:TMR1L ---------------------- LOAD_TIMER macro MOVE?CT 0, T1CON,TMR1ON MOVE?CB 0, TMR1L MOVE?CB 0, TMR1H ADD2_TIMER endm ENDASM ' ------[ This is the Interrupt Handler ]----------------------------------- T1PS CON EXT ClockCount: @ RELOAD_TIMER ; Reload TIMER1 EL_Ticks = EL_Ticks + 1 ; each tick is 2.5ms IF LATD.3 = 0 THEN ' debug LATD.3 = 1 ELSE LATD.3 = 0 ENDIF if EL_ticks // T1PS = 0 THEN ' if modulas of tips (4) = 0 IF LATD.3 = 0 THEN ' debug LATD.3 = 1 ELSE LATD.3 = 0 ENDIF EL_100th = EL_100th + 1 EL_100thChanged = 1 IF EL_100TH = 100 THEN EL_100TH = 0 EL_Seconds = EL_Seconds + 1 EL_SecondsChanged = 1 IF EL_Seconds = 60 THEN EL_Seconds = 0 EL_Minutes = EL_Minutes + 1 EL_MinutesChanged = 1 eNDIF IF EL_Minutes = 60 THEN EL_Minutes = 0 EL_Hours = EL_Hours + 1 EL_HoursChanged = 1 ENDIF IF EL_Hours = 24 THEN EL_Hours = 0 EL_Days = EL_Days + 1 EL_DaysChanged = 1 ENDIF eNDIF endif ' Ticks = Ticks + 1 ' IF Ticks = 100 THEN ' Ticks = 0 ' T1Post = T1Post + 1 ' IF T1Post = T1PS THEN ' T1Post = 0 ' Seconds = Seconds + 1 ' SecondsChanged = 1 ' IF Seconds = 60 THEN ' Seconds = 0 ' Minutes = Minutes + 1 ' MinutesChanged = 1 ' ENDIF ' IF Minutes = 60 THEN ' Minutes = 0 ' Hours = Hours + 1 ' HoursChanged = 1 ' ENDIF ' IF Hours = 24 THEN ' Days = Days + 1 ' DaysChanged = 1 ' Hours = 0 ' ENDIF ' ENDIF ' ENDIF @ INT_RETURN ; Restore context and return from interrupt '-----====[ END OF TMR1 Interrupt Handler ]====----------------------------- StartTimer: T1CON = 1 ; 1:1, FOSC4, TMR1ON RETURN ; -------------------------------------------------------------------------- StopTimer: T1CON.0 = 0 ; Turn OFF Timer1 RETURN ; -------------------------------------------------------------------------- BitSave VAR BIT ResetTime: BitSave = T1CON.0 ; Save TMR1ON bit @ LOAD_TIMER ; Load TimerConst T1CON.0 = BitSave ; Restore TMR1ON bit ; T1Post = 0 ; clear the postscaler EL_Ticks = 0 EL_100th = 0 EL_Seconds = 0 EL_Minutes = 0 EL_Hours = 0 EL_Days = 0 EL_100thChanged = 1 EL_SecondsChanged = 1 ; indicate everything has changed EL_MinutesChanged = 1 ; so that 00:00:00 is processed EL_HoursChanged = 1 EL_DaysChanged = 1 RETURN OverElapsed: ENABLE DEBUG
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
My output pin changes state every 2.5ms at 64MHz.
Code:'*************************************************************************** '* Name : Elapsed_INT-18.bas * '* Author : Darrel Taylor * '* Date : JUL 11, 2006 : 7/11/2010 * '* Version : 1.2 * '* Notes : Must have DT_INTS-18.bas loaded first * '* ver 1.2: Now works at any OSC frequency without using the prescaler * '*************************************************************************** DISABLE DEBUG ; syntax = Handler IntSource, Label, Type, ResetFlag? DEFINE Elapsed_Handler TMR1_INT, _ClockCount, asm, yes ; the above define can be used in the INT_LIST macro, if desired (optional) EL_Ticks VAR BYTE ; Counts timer Overflows EL_100th VAR BYTE ;T1Post VAR BYTE ; Timer1 postscaler EL_Seconds VAR BYTE EL_Minutes VAR BYTE EL_Hours VAR BYTE EL_Days VAR WORD EL_100thChanged VAR BIT EL_SecondsChanged VAR BIT ; idicates that the value has changed EL_MinutesChanged VAR BIT EL_HoursChanged VAR BIT EL_DaysChanged VAR BIT GOSUB ResetTime ; initialize the Elapsed Timer Goto OverElapsed ; skip over the routines ' -------------- calc timer reload Constants ------------------------------- ASM T1PS = 1 ; start with 1:1 postscaler TimerConst = ((OSC*1000000)/4/100) ; how many timer ticks will it take while TimerConst > 65400 ; if it's more than the timer can count T1PS = T1PS * 2 ; double the postscaler TimerConst = TimerConst / 2 ; halve the count endw TimerConst = 65536 - TimerConst + 8 ; final reload value ; ----------------- ADD TimerConst to TMR1H:TMR1L ------------------------- ADD2_TIMER macro BCF T1CON,TMR1ON, 0 ; 1 Turn off timer MOVLW LOW(TimerConst) ; 1 ADDWF TMR1L,F, 0 ; 1 BTFSC STATUS,C ; 1/2 INCF TMR1H,F, 0 ; 1 MOVLW HIGH(TimerConst) ; 1 ADDWF TMR1H,F, 0 ; 1 endm ; ----------------- ADD TimerConst to TMR1H:TMR1L and restart TIMER1 ------ RELOAD_TIMER macro ADD2_TIMER BSF T1CON,TMR1ON, 0 ; 1 Turn TIMER1 back on (8 cycles) endm ; ----------------- Load TimerConst into TMR1H:TMR1L ---------------------- LOAD_TIMER macro MOVE?CT 0, T1CON,TMR1ON MOVE?CB 0, TMR1L MOVE?CB 0, TMR1H ADD2_TIMER endm ENDASM ' ------[ This is the Interrupt Handler ]----------------------------------- T1PS CON EXT ClockCount: @ RELOAD_TIMER ; Reload TIMER1 EL_Ticks = EL_Ticks + 1 ; each tick is 2.5ms IF LATD.3 = 0 THEN ' debug LATD.3 = 1 ELSE LATD.3 = 0 ENDIF if EL_ticks // T1PS = 0 THEN ' if modulas of tips (4) = 0 IF LATD.3 = 0 THEN ' debug LATD.3 = 1 ELSE LATD.3 = 0 ENDIF EL_100th = EL_100th + 1 EL_100thChanged = 1 IF EL_100TH = 100 THEN EL_100TH = 0 EL_Seconds = EL_Seconds + 1 EL_SecondsChanged = 1 IF EL_Seconds = 60 THEN EL_Seconds = 0 EL_Minutes = EL_Minutes + 1 EL_MinutesChanged = 1 eNDIF IF EL_Minutes = 60 THEN EL_Minutes = 0 EL_Hours = EL_Hours + 1 EL_HoursChanged = 1 ENDIF IF EL_Hours = 24 THEN EL_Hours = 0 EL_Days = EL_Days + 1 EL_DaysChanged = 1 ENDIF eNDIF endif ' Ticks = Ticks + 1 ' IF Ticks = 100 THEN ' Ticks = 0 ' T1Post = T1Post + 1 ' IF T1Post = T1PS THEN ' T1Post = 0 ' Seconds = Seconds + 1 ' SecondsChanged = 1 ' IF Seconds = 60 THEN ' Seconds = 0 ' Minutes = Minutes + 1 ' MinutesChanged = 1 ' ENDIF ' IF Minutes = 60 THEN ' Minutes = 0 ' Hours = Hours + 1 ' HoursChanged = 1 ' ENDIF ' IF Hours = 24 THEN ' Days = Days + 1 ' DaysChanged = 1 ' Hours = 0 ' ENDIF ' ENDIF ' ENDIF @ INT_RETURN ; Restore context and return from interrupt '-----====[ END OF TMR1 Interrupt Handler ]====----------------------------- StartTimer: T1CON = 1 ; 1:1, FOSC4, TMR1ON RETURN ; -------------------------------------------------------------------------- StopTimer: T1CON.0 = 0 ; Turn OFF Timer1 RETURN ; -------------------------------------------------------------------------- BitSave VAR BIT ResetTime: BitSave = T1CON.0 ; Save TMR1ON bit @ LOAD_TIMER ; Load TimerConst T1CON.0 = BitSave ; Restore TMR1ON bit ; T1Post = 0 ; clear the postscaler EL_Ticks = 0 EL_100th = 0 EL_Seconds = 0 EL_Minutes = 0 EL_Hours = 0 EL_Days = 0 EL_100thChanged = 1 EL_SecondsChanged = 1 ; indicate everything has changed EL_MinutesChanged = 1 ; so that 00:00:00 is processed EL_HoursChanged = 1 EL_DaysChanged = 1 RETURN OverElapsed: ENABLE DEBUG
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
Yes, I'm an idiot.
T1CON becomes 00000001 once it is STARTED! D'OH!
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
Sheldon,
It's not perfect, I'm missing some pulses on the Saleae probe, but it's sticking to a 2.5ms tick as you describe in your Elapsed include comment.
EDIT: I just noticed that the skipped pulse happens at every 4 ticks.
And that skipped pulse is between 20-21uS.
EDIT SOME MORE: Got it, it's that 2nd LED toggle. I commented it out and now I have a regular 2.5ms pulse.
Robert
Last edited by Demon; - 23rd December 2014 at 04:43.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
|
Re: Elapsed timer not working as expected at 64MHz
Yup, I get 10ms if I comment out the 1st LED toggle.
Attachment 7542
I understand quickly as long as you explain 10 times.
Robert
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
Well that toggle from Sheldon confirms DT's is not working perfectly at 64MHz.
I get 2.5ms on each LED toggle.
Thanks a lot Sheldon for having figured this one out.Code:T1PS CON EXT ClockCount: @ RELOAD_TIMER ; Reload TIMER1 Ticks = Ticks + 1 IF LATD.3 = 0 THEN ' debug LATD.3 = 1 ELSE LATD.3 = 0 ENDIF IF Ticks = 100 THEN Ticks = 0 T1Post = T1Post + 1 IF T1Post = T1PS THEN T1Post = 0 Seconds = Seconds + 1 SecondsChanged = 1 IF Seconds = 60 THEN Seconds = 0 Minutes = Minutes + 1 MinutesChanged = 1 ENDIF IF Minutes = 60 THEN Minutes = 0 Hours = Hours + 1 HoursChanged = 1 ENDIF IF Hours = 24 THEN Days = Days + 1 DaysChanged = 1 Hours = 0 ENDIF ENDIF ENDIF @ INT_RETURN ; Restore context and return from interrupt
Robert
GAAAAA must not click on MeProg PROGRAM icon when I want to click on POST, it won't work.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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Re: Elapsed timer not working as expected at 64MHz
now I'm confused
orWell that toggle from Sheldon confirms DT's is not working perfectly at 64MHz.
Well that toggle from Sheldon confirms DT's is working perfectly at 64MHz.
ps
can be replaced withIF LATD.3 = 0 THEN ' debug
LATD.3 = 1
ELSE
LATD.3 = 0
ENDIF
latd.3=!latd.3
lets not have too much unnecessary overhead in the interrupt
Last edited by richard; - 23rd December 2014 at 05:20.
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Re: Elapsed timer not working as expected at 64MHz
DT's Elapsed include doesn't work perfectly at 64MHz (1 tick = 2.5ms), Sheldon's modified version does (1/100th = 10ms). Sheldon has added a new variable. I'm cleaning up the new include now to put it on the forum, somewhere.
Robert
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
|
Re: Elapsed timer not working as expected at 64MHz
New version of Darrel Taylor's Elapsed include for 64MHz:
New field OneHundreth (10ms) replaces Tick (2.5ms at 64MHz).Code:'*************************************************************************** '* Name : Elapsed_INT-18.bas * '* Author : Darrel Taylor * '* Date : JUL 11, 2006 : 7/11/2010 : Dec 23, 2014 * '* Version : 1.3 * '* Notes : Must have DT_INTS-18.bas loaded first * '* ver 1.2: Now works at any OSC frequency without using the prescaler * '* ver 1.3: will work with 64MHz thanks to Sheldon * '* New field ONEHUNDRETH is now used instead of TICKS * '*************************************************************************** DISABLE DEBUG ; syntax = Handler IntSource, Label, Type, ResetFlag? DEFINE Elapsed_Handler TMR1_INT, _ClockCount, asm, yes ; the above define can be used in the INT_LIST macro, if desired (optional) Ticks VAR BYTE ; Counts timer Overflows OneHundreth VAR BYTE ; New field for 64MHz ;T1Post VAR BYTE ; Timer1 postscaler Seconds VAR BYTE Minutes VAR BYTE Hours VAR BYTE Days VAR WORD OneHundrethChanged VAR BIT ; New field for 64MHz SecondsChanged VAR BIT ; idicates that the value has changed MinutesChanged VAR BIT HoursChanged VAR BIT DaysChanged VAR BIT GOSUB ResetTime ; initialize the Elapsed Timer Goto OverElapsed ; skip over the routines ' -------------- calc timer reload Constants ------------------------------- ASM T1PS = 1 ; start with 1:1 postscaler TimerConst = ((OSC*1000000)/4/100) ; how many timer ticks will it take while TimerConst > 65400 ; if it's more than the timer can count T1PS = T1PS * 2 ; double the postscaler TimerConst = TimerConst / 2 ; halve the count endw TimerConst = 65536 - TimerConst + 8 ; final reload value ; ----------------- ADD TimerConst to TMR1H:TMR1L ------------------------- ADD2_TIMER macro BCF T1CON,TMR1ON, 0 ; 1 Turn off timer MOVLW LOW(TimerConst) ; 1 ADDWF TMR1L,F, 0 ; 1 BTFSC STATUS,C ; 1/2 INCF TMR1H,F, 0 ; 1 MOVLW HIGH(TimerConst) ; 1 ADDWF TMR1H,F, 0 ; 1 endm ; ----------------- ADD TimerConst to TMR1H:TMR1L and restart TIMER1 ------ RELOAD_TIMER macro ADD2_TIMER BSF T1CON,TMR1ON, 0 ; 1 Turn TIMER1 back on (8 cycles) endm ; ----------------- Load TimerConst into TMR1H:TMR1L ---------------------- LOAD_TIMER macro MOVE?CT 0, T1CON,TMR1ON MOVE?CB 0, TMR1L MOVE?CB 0, TMR1H ADD2_TIMER endm ENDASM ' ------[ This is the Interrupt Handler ]----------------------------------- T1PS CON EXT ClockCount: @ RELOAD_TIMER ; Reload TIMER1 Ticks = Ticks + 1 ; each tick is 2.5ms ' IF LATD.3 = 0 THEN ' used to debug to confirm 2.5ms ' LATD.3 = 1 ' ELSE ' LATD.3 = 0 ' ENDIF if ticks // T1PS = 0 THEN ' if modulas of tips (4) = 0 ' IF LATD.3 = 0 THEN ' used to debug to confirm 10ms ' LATD.3 = 1 ' ELSE ' LATD.3 = 0 ' ENDIF OneHundreth = OneHundreth + 1 ; each 1/100th is 10ms OneHundrethChanged = 1 IF OneHundreth = 100 THEN OneHundreth = 0 ' Ticks = Ticks + 1 ' IF Ticks = 100 THEN ' Ticks = 0 ' T1Post = T1Post + 1 ' IF T1Post = T1PS THEN ' T1Post = 0 Seconds = Seconds + 1 SecondsChanged = 1 IF Seconds = 60 THEN Seconds = 0 Minutes = Minutes + 1 MinutesChanged = 1 ENDIF IF Minutes = 60 THEN Minutes = 0 Hours = Hours + 1 HoursChanged = 1 ENDIF IF Hours = 24 THEN Days = Days + 1 DaysChanged = 1 Hours = 0 ENDIF ENDIF ENDIF @ INT_RETURN ; Restore context and return from interrupt '-----====[ END OF TMR1 Interrupt Handler ]====----------------------------- StartTimer: T1CON = 1 ; 1:1, FOSC4, TMR1ON RETURN ; -------------------------------------------------------------------------- StopTimer: T1CON.0 = 0 ; Turn OFF Timer1 RETURN ; -------------------------------------------------------------------------- BitSave VAR BIT ResetTime: BitSave = T1CON.0 ; Save TMR1ON bit @ LOAD_TIMER ; Load TimerConst T1CON.0 = BitSave ; Restore TMR1ON bit ; T1Post = 0 ; clear the postscaler Ticks = 0 OneHundreth = 0 Seconds = 0 Minutes = 0 Hours = 0 Days = 0 OneHundrethChanged = 1 SecondsChanged = 1 ; indicate everything has changed MinutesChanged = 1 ; so that 00:00:00 is processed HoursChanged = 1 DaysChanged = 1 RETURN OverElapsed: ENABLE DEBUG
(Remove .TXT suffix)
Elapsed_INT-18_64MHz.bas.txt
Robert
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
|
Re: Elapsed timer not working as expected at 64MHz
you may like to re-examine that I just tried it on a pic1845k20 @64 MHz and the int is @2.5mS as expected , sheldons mod just adds 100th capability doesn't it ?
the seconds inc on every 400th interrupt the ticks are not meant to be 10mS
Last edited by richard; - 23rd December 2014 at 05:57. Reason: better explanition
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Re: Elapsed timer not working as expected at 64MHz
From http://web.archive.org/web/201206151...8/elapsed.html
But a tick is not 2.5ms.The time is kept in the variables:
--------------------------------------------------------------------------------
Ticks var byte ' 1/100th of a second
Seconds var byte ' 0-59
Minutes var byte ' 0-59
Hours var byte ' 0-23
Days var word ' 0-65535
Robert
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Re: Elapsed timer not working as expected at 64MHz
What happens when you start/stop the timer after 5 ticks using the original include?
I get this using the new include:
RobertCode:MainProgram: if T1CON.0 = 0 then PortD.3 = 1 GOSUB StartTimer endif if OneHundreth = 5 then PortD.3 = 0 GOSUB StopTimer ' Stop the Elapsed Timer GOSUB ResetTime ' Reset Time to 0d-00:00:00.00 endif goto MainProgram
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Re: Elapsed timer not working as expected at 64MHz
its a clock not a stopwatch , if you really need to measure wee small times like that there are better ways.
to get the fractional part of the seconds multiply t1post with ticks and / 4
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Re: Elapsed timer not working as expected at 64MHz
ticks should be 2.5ms , 1/100 is 4 x tick = 10ms , 1 sec should be 100 x 1/100th or 400 tick = 1sec
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Re: Elapsed timer not working as expected at 64MHz
i did version of DTs elapsed timer that shown at 1/1000 , assuming it does nothing else in life and you got a good xtl , it work ok up to 12 hours , when i tested it
also DT had a thing about showing code doing a countdown timer , so i never posted it as per his request
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Re: Elapsed timer not working as expected at 64MHz
Code:EL_Ticks VAR BYTE ; Ticks Up Counter -timer Overflows EL_100th VAR BYTE ; value for 1/100s EL_Seconds VAR BYTE ; value for seconds EL_Minutes VAR byte EL_Hours VAR BYTE EL_Days VAR BYTE
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