Instant Interrupts - Revisited

[mpgmike]

Wow! 7 years & still adding pages! A conversation with Daryl led me here. I want to have an event occur just prior to the end of a PWM period. I was told it had to be done in assembly. My project is based on the PIC16F1828, uses CCP for PWM, DSM (Digital Signal Modulation) to embed HF within a slower PWM clock, and just before the Off/On I need to trigger an event. Got it working thanks to Daryl. Here's what it looks like:



The code looks like this:


define OSC 32
define ADC_BITS 8
define ADC_CLOCK 3
DEFINE ADC_SAMPLEUS 50

#CONFIG
CONFIG1_FOSC_INTOSC
CONFIG1_MCLRE_OFF
CONFIG1_CLKOUTEN_OFF
CONFIG2_PLLEN_ON
#endconfig

OSCCON = %11110011
TRISA = %00111100
TRISB = %01100000
TRISC = %11001011
ANSELA = %00011111
ANSELB = %01100000
ANSELC = %11001011
WPUA = 0
WPUB = 0
WPUC = 0
MDSRC = %10000010 'DSM Activated (.7) on CCP1 (RC5) (<3:0>
MDCARH = %10000011 'OOK Mode
MDCARL = %10100000 'Disables Low Carrier Signal; OOK Mode
MDCON = %11000000 '.7 Enables OOK, .3 Current State (read only)
CLKRCON = %10110000

b0 var byte
b1 var byte
b1 = 0
LED1 VAR PORTC.5
TPS_In var PORTC.7 'AN9

INCLUDE "DT_INTS-14.bas" ' Base Interrupt System
INCLUDE "ReEnterPBP.bas" ' Include if using PBP interrupts
ASM
INT_LIST macro ; IntSource, Label, Type, ResetFlag?
INT_Handler TMR2_INT, _SetTR4, PBP, yes
INT_Handler TMR4_INT, _GP, PBP, yes
endm
INT_CREATE ; Creates the interrupt processor
ENDASM

'T1CON = %00110001 ; Prescaler=8, TMR1ON
@ INT_ENABLE TMR2_INT ; enable Timer 2 interrupts

Main:
adcin 9, b0
hpwm 1, b0, 1056
PAUSE 1
GOTO Main

'---[TMR1 - interrupt handler]--------------------------------------------------
SetTR4:
T4CON = T2CON
PR4 = PR2
TMR4 = TMR2 - 246
@ INT_ENABLE TMR4_INT
@ INT_RETURN
GP:
pulsout PORTC.5, 5
@ INT_DISABLE TMR4_INT
'@ INT_CLEAR TMR1_INT
@ INT_RETURN

end


All I can say is, I'm so glad I found ME Labs and now this forum. Overwhelming thanks to Charles, Daryl, and many whose work I've gleened from, but have yet to get to know personally.

Mike

[ShoKre]

Hi, is there any known error /workaround for using eeprom "read"(didn't test write) while @ INT_ENABLE TMR1_INT ; Enable Timer 1 Interrupts ?
I use 16f1827, if I comment INT_enable line, all works great, but if line is enabled, read command return same index instead value
i experimented with putting int_disable before read int_enable after, putting some pause between disabling/enabling GIE before/after read
but nothing give me result, only when INT_enable commented, never executed, then works...

[Dave]

ShoKre, I have never had a problem using the READ and WRITE commands while having the interrupts enabled. I have used it with 18F8722, 18F67k22, 18f46k22, 18f4620, 18f452, 16f1825, 18f1320, 16f88, 12f1840.
Maybe you should post some code and we here can have a look?

[ShoKre]

i figured out what interfere, i have readcode command in my (basic)ISR, and read in main-loop, after i commented readcode in isr read in main-loop has began to work, so, now i have to find another way
for reading LED gamma table in isr, or pattern eeprom in main, at least I found what interfere, and the way will come, maybe put read in isr too.... there is more than 500ln of code so it will probably make
treed dirty with non important/regarded stuff...
..it is good to know that there isn't other problems with dt-ints and read.
...found interesting or sad errata for 16f1827 http://ww1.microchip.com/downloads/e...Doc/80485G.pdf so ih you bught chip with 1M/100k read write eeprom/flash, you actually get 1k/10k , good to know for save lifespan with fewer writes... i was reading that when couldn't read eeprom...
(sorry for my bad English if sentences sometime don't have sense

thanx anyway,

[pickup]

Hi all

Could anybody help me with a problem I'm having with using instant interrupts "Thanks to Darrel for all his work" and the IC3 module of the PIC18F2431
I can get IC1 (CAP1) to work OK also IC2(CAP2) but when I compile using IC3 (CAP3) I get the following errors.

Symbol not previously defined (IntFlagReg)
Symbol not previously defined (IntFlagBit)
ERROR: (Interrupt Source IntFlagReg,IntFlagBit) not found)

Following is a snip-it from parts of the program and if I substitute IC3DRIF_INT for IC1IF_INT or IC2QEF and change the CAP3BUF's for 1 or 2 every thing works OK.

I've tried every thing I can think of but not bright enough to sort this out.
Using PBX 3.0.4.1


INT_Handler IC3DRIF_INT

INT_LIST macro ;IntSource, Label, Type, ResetFlag?

INT_Handler IC3DRIF_INT, _InputSignal, ASM, yes

@ INT_Handler IC3DRIF_INT

InputSignal: 'Input pulse width capture of CAP3


ReciverOutput.lowbyte = CAP3BUFL
ReciverOutput.highbyte = CAP3BUFH

Passthrough = ReciverOutut


Thanks in advance Geoff

[Demon]

Totally wild guess, Darrel's routine only has code for #1 and 2. Can't check includes and asm files from my phone, but I'd start there.

Robert