I try now since a couple of hours to translatethe 16F690 CSS C code into Swordfish for 18fxxxx but with no real success on the interrupt routine
the original code looks like this:
Code: Select all
#int_TIMER1
void uberlauf_timer1 (void) // hier die Timer Überläufe erfassen
{timer1_uberlauf++;}
/****************************************************************************
****************************************************************************/
#int_ext // Interrupt service Routine
void interrupt (void)
{
if (flanke) // wenn gesetzt dann Impuls Ende erkannt
{ setup_timer_1(T1_DISABLED); // Timer stop
dcf77_start_bit=timer1_uberlauf; // den Überlauf hier abspeichern
timer1_uberlauf=0; // lösche für neue Messung
timer1_H=TMR1H; // abspeichern - high Byte Timer
impuls_ok=1; // Merkbit der Impuls liegt an
restart_wdt(); // Watchdog zurücksetzen
ext_int_edge(L_TO_H); // Flanke umstellen für (Anfang-Impuls)
setup_timer_1(T1_INTERNAL|T1_DIV_BY_4); // Timer wieder aktiv
flanke=0; } // lösche Merkbit neue Messung
else
{ set_timer1(0); // lösche Timer * 2µs
ext_int_edge(H_TO_L); // Flanke umstellen für (Ende-Impuls)
flanke=1; } // setze Merkbit zum abspeichern
}
disable_interrupts(GLOBAL); // Globaler Interrupt sperren
disable_interrupts(INT_TIMER1); // Interrupt für... sperren
setup_timer_1(T1_INTERNAL|T1_DIV_BY_4); // Timer einstellen
timer1_H=0; // löschen Inhalt Timer1 high Byte
timer1_L=0; // löschen Inhalt Timer1 low Byte
ext_int_edge(L_TO_H); // Flanke einstellen
enable_interrupts(INT_EXT); // Interrupt für... freigabe
enable_interrupts(INT_TIMER1); // Interrupt für... freigabe
enable_interrupts(GLOBAL); // Globaler Interrupt Freigabe
Code: Select all
Interrupt service()
If (INTCON.4 > 0) And (INTCON.1 > 0) Then
INTCON.1 = 0
INTCON2.6 =1 ' INTEDG0 rising edge trigger
If flanke = 1 Then // if 1 Impuls end detected
T1CON.0 = 0 // Timer stop
dcf77_start_bit=timer1_uberlauf // store rollover
timer1_uberlauf=0 // clear for for new measurement
timer1_H=TMR1H // store- high Byte Timer
impuls_ok=1 // Impuls detected
INTCON2.6 =1 // ext_int_edge(L_TO_H) Startpuls;
TMR1H = $15 // preset for timer1 MSB register
TMR1L = $A0 // preset for timer1 LSB register
flanke=0 // clear Merkbit start again
Else
PIR1.0 = 0 // clear Timer * 2µs
INTCON2.6 =0 // ext_int_edge(H_TO_L endpulse)
flanke=1 // set Merkbit
End If
End If
If PIR1.0 = 1 Then
inc(timer1_uberlauf)
End If
End Interrupt
INTCON.1 = 0 ' INT0IF
INTCON.4 = 1 ' INT0IE
INTCON.6 = 1
INTCON.7 = 1
INTCON2.6 =1 ' INTEDG0 rising edge trigger
INTCON2.7 = 0 ' weak pullups off
//intcon.5 'TMR0IE: TMR0 Overflow Interrupt Enable bit
TRISB.0 = 1 ' RB0 is input
T1CON.5 = 1 ' T1CKPS1 bits 5-4 Prescaler Rate Select bits
T1CON.4 = 1 'T1CKPS0
T1CON.3 = 1 ' T1OSCEN bit 3 Timer1 Oscillator Enable Control: bit 1=on
T1CON.2 = 1 ' T1SYNC bit 2 Timer1 External Clock Input Synchronization Control bit: 1=Do not synchronize external clock input
T1CON.1 = 0 ' TMR1CS bit 1 Timer1 Clock Source Select bit: 0=Internal clock (FOSC/4) / 1 = External clock from pin T1CKI (on the rising edge)
T1CON.0 = 1 ' TMR1ON bit 0 enables timer
TMR1H = $15 ' preset for timer1 MSB register
TMR1L = $A0 ' preset for timer1 LSB register
PIR1.0 = 0 ' clear TMR1IF i am not really sure regarding the different timer settings and the 'special' CSS commands, if somebody can give me a hand here?
THX
M