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p18_tmr1.c
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/* ########################################################################
PICsim - PIC simulator
########################################################################
Copyright (c) : 2019-2020 Luis Claudio Gamboa Lopes
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
For e-mail suggestions : lcgamboa@yahoo.com
######################################################################## */
#include "../../include/periferic18.h"
#include "../../include/picsim.h"
#include <stdio.h>
extern const int fpw2[];
void p18_tmr1_rst(_pic *pic) { pic->cp1 = 0; }
void p18_tmr1(_pic *pic) {
if ((((*pic->P18map.T1CON) & 0x03) == 0x01) || // TMRICS=FOSC/4 TMREN=1
((((*pic->P18map.T1CON) & 0x03) == 0x03) &&
((pic->t1cki_ == 0) &&
(pic->pins[pic->t1cki - 1].value == 1)))) // TMRICS=t1cki TMREN=1
{
pic->cp1++;
if (pic->cp1 >= fpw2[((*pic->P18map.T1CON) & 0x30) >> 4]) {
(*pic->P18map.TMR1L)++;
if ((*pic->P18map.TMR1L) == 0) {
if (((*pic->P18map.TMR1H) + 1) == 0x100)
(*pic->P18map.PIR1) |= 0x01; // TMR1IF
(*pic->P18map.TMR1H)++;
}
pic->cp1 = 0;
}
// CCP - only when TMR1 is ON
// CCP1 compare modes
if ((pic->CCPCOUNT >= 1) && (pic->ccp[0].pin > 0) &&
(((*pic->P18map.CCP1CON) & 0x0C) == 0x08) &&
(!((*pic->P18map.T3CON) & 0x40))) {
if (((*pic->P18map.TMR1H) == (*pic->P18map.CCPR1H)) &&
((*pic->P18map.TMR1L) == (*pic->P18map.CCPR1L))) // match !!
{
(*pic->P18map.PIR1) |= 0x04; // CCP1IF
switch ((*pic->P18map.CCP1CON) & 0x03) {
case 0: // set output
if (pic->pins[pic->ccp[0].pin - 1].dir == PD_OUT)
(*pic->pins[(pic->ccp[0].pin - 1)].port) |=
0x01 << (pic->pins[(pic->ccp[0].pin - 1)].pord);
break;
case 1: // clear output
if (pic->pins[pic->ccp[0].pin - 1].dir == PD_OUT)
(*pic->pins[(pic->ccp[0].pin - 1)].port) &=
~(0x01 << (pic->pins[(pic->ccp[0].pin - 1)].pord));
break;
case 2: // software interrupt
break;
case 3: // trigger special event
(*pic->P18map.TMR1H) = 0;
(*pic->P18map.TMR1L) = 0;
break;
}
}
}
// CCP2 compare modes
if ((pic->CCPCOUNT >= 2) && (pic->ccp[1].pin > 0) &&
(((*pic->P18map.CCP2CON) & 0x0C) == 0x08) &&
(!((*pic->P18map.T3CON) & 0x48))) {
if (((*pic->P18map.TMR1H) == (*pic->P18map.CCPR2H)) &&
((*pic->P18map.TMR1L) == (*pic->P18map.CCPR2L))) // match !!
{
(*pic->P18map.PIR2) |= 0x01; // CCP2IF
switch ((*pic->P18map.CCP2CON) & 0x03) {
case 0: // set output
if (pic->pins[pic->ccp[1].pin - 1].dir == PD_OUT)
(*pic->pins[(pic->ccp[1].pin - 1)].port) |=
0x01 << (pic->pins[(pic->ccp[1].pin - 1)].pord);
break;
case 1: // clear output
if (pic->pins[pic->ccp[1].pin - 1].dir == PD_OUT)
(*pic->pins[(pic->ccp[1].pin - 1)].port) &=
~(0x01 << (pic->pins[(pic->ccp[1].pin - 1)].pord));
break;
case 2: // software interrupt
break;
case 3: // trigger special event
(*pic->P18map.TMR1H) = 0;
(*pic->P18map.TMR1L) = 0;
if (pic->processor == P18F452) {
if ((*pic->P18map.ADCON0) & 0x01)
(*pic->P18map.ADCON0) |= 0x04; // if ad on, enable one conversion
} else {
if ((*pic->P18map.ADCON0) & 0x01)
(*pic->P18map.ADCON0) |= 0x02; // if ad on, enable one conversion
}
break;
}
}
}
}
// CCP CAPTURE //TODO capture P18F only work for TIMER1
if (((*pic->P18map.T1CON) & 0x01) == 0x01) // TMREN=1
{
if ((pic->CCPCOUNT >= 1) && (pic->ccp[0].pin > 0)) {
if (((*pic->P18map.CCP1CON) & 0x0C) == 0x04) // CAPTURE MODE
{
if (pic->pins[pic->ccp[0].pin - 1].value !=
pic->ccp[0].ovalue) // pin state change
{
switch ((*pic->P18map.CCP1CON) & 0x03) {
case 0: // Every falling edge
if (pic->ccp[0].ovalue == 1) {
(*pic->P18map.PIR1) |= 0x04; // CCP1IF
(*pic->P18map.CCPR1H) = (*pic->P18map.TMR1H);
(*pic->P18map.CCPR1L) = (*pic->P18map.TMR1L);
}
break;
case 1: // Every rising edge
if (pic->ccp[0].ovalue == 0) {
(*pic->P18map.PIR1) |= 0x04; // CCP1IF
(*pic->P18map.CCPR1H) = (*pic->P18map.TMR1H);
(*pic->P18map.CCPR1L) = (*pic->P18map.TMR1L);
}
break;
case 2: // Every 4th rising edge
if (pic->ccp[0].ovalue == 0) {
pic->ccp[0].cap_ps++;
if (pic->ccp[0].cap_ps == 4) {
pic->ccp[0].cap_ps = 0;
(*pic->P18map.PIR1) |= 0x04; // CCP1IF
(*pic->P18map.CCPR1H) = (*pic->P18map.TMR1H);
(*pic->P18map.CCPR1L) = (*pic->P18map.TMR1L);
}
}
break;
case 3: // Every 16th rising edge
if (pic->ccp[0].ovalue == 0) {
pic->ccp[0].cap_ps++;
if (pic->ccp[0].cap_ps == 16) {
pic->ccp[0].cap_ps = 0;
(*pic->P18map.PIR1) |= 0x04; // CCP1IF
(*pic->P18map.CCPR1H) = (*pic->P18map.TMR1H);
(*pic->P18map.CCPR1L) = (*pic->P18map.TMR1L);
}
}
break;
}
pic->ccp[0].ovalue = pic->pins[(pic->ccp[0].pin - 1)].value;
}
}
}
if ((pic->CCPCOUNT >= 2) && (pic->ccp[1].pin > 0)) {
if (((*pic->P18map.CCP2CON) & 0x0C) == 0x04) // CAPTURE MODE
{
if (pic->pins[pic->ccp[1].pin - 1].value !=
pic->ccp[1].ovalue) // pin state change
{
switch ((*pic->P18map.CCP2CON) & 0x03) {
case 0: // Every falling edge
if (pic->ccp[1].ovalue == 1) {
(*pic->P18map.PIR2) |= 0x01; // CCP2IF
(*pic->P18map.CCPR2H) = (*pic->P18map.TMR1H);
(*pic->P18map.CCPR2L) = (*pic->P18map.TMR1L);
}
break;
case 1: // Every rising edge
if (pic->ccp[1].ovalue == 0) {
(*pic->P18map.PIR2) |= 0x01; // CCP2IF
(*pic->P18map.CCPR2H) = (*pic->P18map.TMR1H);
(*pic->P18map.CCPR2L) = (*pic->P18map.TMR1L);
}
break;
case 2: // Every 4th rising edge
if (pic->ccp[1].ovalue == 0) {
pic->ccp[1].cap_ps++;
if (pic->ccp[1].cap_ps == 4) {
pic->ccp[1].cap_ps = 0;
(*pic->P18map.PIR2) |= 0x01; // CCP1IF
(*pic->P18map.CCPR2H) = (*pic->P18map.TMR1H);
(*pic->P18map.CCPR2L) = (*pic->P18map.TMR1L);
}
}
break;
case 3: // Every 16th rising edge
if (pic->ccp[1].ovalue == 0) {
pic->ccp[1].cap_ps++;
if (pic->ccp[1].cap_ps == 16) {
pic->ccp[1].cap_ps = 0;
(*pic->P18map.PIR2) |= 0x01; // CCP2IF
(*pic->P18map.CCPR2H) = (*pic->P18map.TMR1H);
(*pic->P18map.CCPR2L) = (*pic->P18map.TMR1L);
}
}
break;
}
pic->ccp[1].ovalue = pic->pins[(pic->ccp[1].pin - 1)].value;
}
}
}
}
}
void p18_tmr1_2(_pic *pic) {
if ((*pic->P18map.T1CON) & 0x01) // ON
{
// TODO support all modes
if ((((*pic->P18map.T1CLK) & 0x0F) == 0x01) || // TMRICS=FOSC/4
((((*pic->P18map.T1CLK) & 0x0F) == 0x00) &&
((pic->t1cki_ == 0) &&
(pic->pins[pic->t1cki - 1].value == 1)))) // TMRICS=t1cki
{
pic->cp1++;
if (pic->cp1 >= fpw2[((*pic->P18map.T1CON) & 0x30) >> 4]) {
(*pic->P18map.TMR1L)++;
if ((*pic->P18map.TMR1L) == 0) {
if (((*pic->P18map.TMR1H) + 1) == 0x100)
(*pic->P18map.PIR4) |= 0x01; // TMR1IF
(*pic->P18map.TMR1H)++;
}
pic->cp1 = 0;
}
/*
//CCP - only when TMR1 is ON
//CCP1 compare modes
if ((pic->CCPCOUNT >= 1)&&(pic->ccp[0] > 0)&&(((*pic->P18map.CCP1CON)
& 0x0C) == 0x08)&&(!((*pic->P18map.T3CON) & 0x40)))
{
if (((*pic->P18map.TMR1H) ==
(*pic->P18map.CCPR1H))&&((*pic->P18map.TMR1L) ==
(*pic->P18map.CCPR1L)))//match !!
{
(*pic->P18map.PIR1) |= 0x04; //CCP1IF
switch ((*pic->P18map.CCP1CON) & 0x03)
{
case 0://set output
if (pic->pins[pic->ccp[0] - 1].dir == PD_OUT)
(*pic->pins[(pic->ccp[0] - 1)].port) |= 0x01 <<
(pic->pins[(pic->ccp[0] - 1)].pord); break; case 1://clear output if
(pic->pins[pic->ccp[0] - 1].dir == PD_OUT)
(*pic->pins[(pic->ccp[0] - 1)].port) &= ~(0x01 <<
(pic->pins[(pic->ccp[0] - 1)].pord)); break; case 2://software
interrupt break; case 3://trigger special event
(*pic->P18map.TMR1H) = 0;
(*pic->P18map.TMR1L) = 0;
break;
}
}
}
//CCP2 compare modes
if ((pic->CCPCOUNT >= 2)&&(pic->ccp[1] > 0)&&(((*pic->P18map.CCP2CON)
& 0x0C) == 0x08)&&(!((*pic->P18map.T3CON) & 0x48)))
{
if (((*pic->P18map.TMR1H) ==
(*pic->P18map.CCPR2H))&&((*pic->P18map.TMR1L) ==
(*pic->P18map.CCPR2L)))//match !!
{
(*pic->P18map.PIR2) |= 0x01; //CCP2IF
switch ((*pic->P18map.CCP2CON) & 0x03)
{
case 0://set output
if (pic->pins[pic->ccp[1] - 1].dir == PD_OUT)
(*pic->pins[(pic->ccp[1] - 1)].port) |= 0x01 <<
(pic->pins[(pic->ccp[1] - 1)].pord); break; case 1://clear output if
(pic->pins[pic->ccp[1] - 1].dir == PD_OUT)
(*pic->pins[(pic->ccp[1] - 1)].port) &= ~(0x01 <<
(pic->pins[(pic->ccp[1] - 1)].pord)); break; case 2://software
interrupt break; case 3://trigger special event
(*pic->P18map.TMR1H) = 0;
(*pic->P18map.TMR1L) = 0;
if (pic->processor == P18F452)
{
if ((*pic->P18map.ADCON0) & 0x01)(*pic->P18map.ADCON0) |= 0x04; //if
ad on, enable one conversion
}
else
{
if ((*pic->P18map.ADCON0) & 0x01)(*pic->P18map.ADCON0) |= 0x02; //if
ad on, enable one conversion
}
break;
}
}
}
*/
}
}
}