DSPIC30F4012 v230 Source Code

[moodz]

QEImenu.c

/*
QEImenu.c - handles the rotary encoder and menu.
Copyright (C) 2011 Paul Moody

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/

#include <p30f4012.h>
#include <stdio.h>
#include <qei.h>
#include "system.h"

unsigned int MenuState;
unsigned int MenuItemState;
unsigned int OptionState;
unsigned int OptionSelect;


extern double Fclock; //input clock frequency in KHz
extern struct VALSTORE valblock;

volatile int QEI_Dir;
volatile int QEI_Event;

extern void save_vars(void);
extern void read_vars(void);
extern int calc_cksum(int, int *);
extern int calc_EE_cksum(int, int *);
extern int cksum_OK(int, int *);

extern char lcdBuff30[30];
extern void lcd_clear(void);
extern void lcd_putc(const char);
extern void lcd_puts(const char *);
extern void lcd_goto(unsigned char);
extern void lcd_test(void);
extern void setup_lcd(void);

extern volatile unsigned int AUDIOrate;

/************************************************** *******************
* Function Name : QEIInterrupt()
* Description : handles rotary encoder interrupts
************************************************** *******************/

void __attribute__((__interrupt__, auto_psv)) _QEIInterrupt(void)
{

IFS2bits.QEIIF = 0; // clear interrupt
if(QEI_Event == 0) // only if there are no pending QEI events
{
QEI_Dir = QEICONbits.UPDN; // store up or down state
QEI_Event = 1; // flag QEI event
}
}


/************************************************** *******************
* Function Name : QEI_Setup()
* Description : initialises rotary encoder
************************************************** *******************/

void QEI_Setup(void)
{
QEICONbits.QEIM = 0; // Disable QEI Module
QEICONbits.CNTERR = 0; // Clear any count errors
QEICONbits.QEISIDL = 0; // Continue operation during sleep
QEICONbits.SWPAB = 0; // QEA and QEB not swapped
QEICONbits.PCDOUT = 0; // Normal I/O pin operation
QEICONbits.POSRES = 0; // pos counter reset by index disable
DFLTCONbits.CEID = 1; // Count error interrupts disabled
DFLTCONbits.QEOUT = 1; // Digital filters output enabled for QEn pins
DFLTCONbits.QECK = 7; // 1:256 clock divide for digital filter for QEn
POSCNT = 0; // Reset position counter
QEICONbits.QEIM = 5; // X4 mode with position counter reset by count
MAXCNT = 1;
IFS2bits.QEIIF = 0; // clear Interrupt flag
IEC2bits.QEIIE = 1; // Enable QEI Interupts
return;
}


/************************************************** *******************
* Function Name : process_QEI()
* Description : handles the rotary encoder and updates the LCD
************************************************** *******************/
void process_QEI(void)
{
if (MenuItemState == OPT)
{
switch ( OptionState )
{
case OptX1:
if(QEI_Dir == 0)
OptionState = OptNORM;
else
OptionState = OptX10;
break;
case OptX10:
if(QEI_Dir == 0)
OptionState = OptX1;
else
OptionState = OptX100;
break;
case OptX100:
if(QEI_Dir == 0)
OptionState = OptX10;
else
OptionState = OptSAVE;
break;
case OptSAVE:
if(QEI_Dir == 0)
OptionState = OptX100;
else
OptionState = OptNORM;
break;
case OptNORM:
if(QEI_Dir == 0)
OptionState = OptSAVE;
else
OptionState = OptX1;
break;
default:
lcd_clear();
lcd_goto(0);
lcd_puts("Option State Err\0");
while(1); //stop here
}//END switch
}//END if (MenuItemState == OPT)

if (MenuItemState == OPT)
{
switch ( OptionState )
{
case OptX1:
OptionSelect = EDIT;
lcd_clear();
lcd_goto(0);
lcd_puts("MODIFY VALUE\0");
lcd_goto(40);
lcd_puts("STEP = X1\0");
break;
case OptX10:
OptionSelect = EDIT;
lcd_clear();
lcd_goto(0);
lcd_puts("MODIFY VALUE\0");
lcd_goto(40);
lcd_puts("STEP = X10\0");
break;
case OptX100:
OptionSelect = EDIT;
lcd_clear();
lcd_goto(0);
lcd_puts("MODIFY VALUE\0");
lcd_goto(40);
lcd_puts("STEP = X100\0");
break;
case OptSAVE:
OptionSelect = SAVE;
lcd_clear();
lcd_goto(0);
lcd_puts("SAVE TO EEPROM\0");
break;
case OptNORM:
OptionSelect = RUN;
lcd_clear();
lcd_goto(0);
lcd_puts("EXIT\0");
break;
default:
lcd_clear();
lcd_goto(0);
lcd_puts("Option State Err\0");
while(1); //stop here
}//END switch
}//END if (MenuItemState == OPT)

/// set menu state to next state if not changing value///
if (MenuItemState == NORM)
{
switch ( MenuState )
{
case A:
if(QEI_Dir == 0)
MenuState = M;
else
MenuState = B;
break;
case B:
if(QEI_Dir == 0)
MenuState = A;
else
MenuState = C;
break;
case C:
if(QEI_Dir == 0)
MenuState = B;
else
MenuState = E;
break;
case E:
if(QEI_Dir == 0)
MenuState = C;
else
MenuState = F;
break;
case F:
if(QEI_Dir == 0)
MenuState = E;
else
MenuState = G;
break;
case G:
if(QEI_Dir == 0)
MenuState = F;
else
MenuState = H;
break;
case H:
if(QEI_Dir == 0)
MenuState = G;
else
MenuState = M;
break;
case M:
if(QEI_Dir == 0)
MenuState = H;
else
MenuState = A;
break;
default:
lcd_clear();
lcd_goto(0);
lcd_puts("Menu State Err\0");
while(1); //stop here
}

}//END if (MenuItemState == NORM)

///display menu for selected state ///
if (MenuItemState != OPT)
{
switch ( MenuState )
{
case A:
if(MenuItemState == EDIT)
{
if(QEI_Dir) //up
{
if(PTPER < (14740 - OptionState)) //OptionState contains the "multiplier" x1 x10 x100 etc
PTPER = PTPER + OptionState;
}
else
{
if(PTPER > (1474 + OptionState))
PTPER = PTPER - OptionState;
}
PDC2 = PTPER>>5; //LCD contrast option
}
if(MenuItemState == SAVE) //save to EEPROM
{
valblock.FREQ = PTPER; //store freq in ram block
save_vars(); //write ram block to EEPROM
MenuItemState = NORM; //leave SAVE state
}
lcd_clear();
lcd_goto(0);
sprintf(lcdBuff30,"TxF:%8.3lf Khz", (Fclock * 4)/PTPER);
lcd_puts(lcdBuff30);
lcd_goto(0x40);
sprintf(lcdBuff30,"Per:%8.3lf uS", (PTPER/(Fclock * 4))*1000);
lcd_puts(lcdBuff30);
break;
case B:
if(MenuItemState == EDIT)
{
if(QEI_Dir) //up
PDC1 = PDC1 + OptionState;
else
PDC1 = PDC1 - OptionState;
}
if(MenuItemState == SAVE) //save to EEPROM
{
valblock.PWM1 = PDC1; //store PWM1 in ram block
save_vars(); //write ram block to EEPROM
MenuItemState = NORM; //leave SAVE state
}
lcd_clear();
lcd_goto(0);
lcd_puts("TX1 PULSE PERIOD\0");
lcd_goto(0x40);
sprintf(lcdBuff30,"%.3lf uS", (PDC1/(Fclock * )*1000);
lcd_puts(lcdBuff30);
break;
case C:
//if(MenuItemState == EDIT)
//{
// if(QEI_Dir) //up
// PDC2 = PDC2 + OptionState;
// else
// PDC2 = PDC2 - OptionState;
//}
//if(MenuItemState == SAVE) //save to EEPROM
//{
// valblock.PWM2 = PDC2; //store PWM1 in ram block
// save_vars(); //write ram block to EEPROM
// MenuItemState = NORM; //leave SAVE state
//}
lcd_clear();
lcd_goto(0);
lcd_puts("TX2 PULSE PERIOD\0");
lcd_goto(0x40);
sprintf(lcdBuff30,"%.3lf uS", (PDC2/(Fclock * )*1000);
lcd_puts(lcdBuff30);
break;
case E:
if(MenuItemState == EDIT)
{
if(QEI_Dir) //up
OC1R = OC1R + OptionState;
else
OC1R = OC1R - OptionState;
}
if(MenuItemState == SAVE) //save to EEPROM
{
valblock.SP1ON = OC1R; //store samp puls 1 ON time in ram block
save_vars(); //write ram block to EEPROM
MenuItemState = NORM; //leave SAVE state
}
lcd_clear();
lcd_goto(0);
lcd_puts("S1 PULSE ON AT:\0");
lcd_goto(0x40);
sprintf(lcdBuff30,"%.3lf uS", (OC1R/Fclock)*2000);
lcd_puts(lcdBuff30);
break;
case F:
if(MenuItemState == EDIT)
{
if(QEI_Dir) //up
OC1RS = OC1RS + OptionState;
else
OC1RS = OC1RS - OptionState;
}
if(MenuItemState == SAVE) //save to EEPROM
{
valblock.SP1OFF = OC1RS; //store PWM1 in ram block
save_vars(); //write ram block to EEPROM
MenuItemState = NORM; //leave SAVE state
}
lcd_clear();
lcd_goto(0);
lcd_puts("S1 PULSE OFF AT:\0");
lcd_goto(0x40);
sprintf(lcdBuff30,"%.3lf uS", (OC1RS/Fclock)*2000);
lcd_puts(lcdBuff30);
break;
case G:
if(MenuItemState == EDIT)
{
if(QEI_Dir) //up
OC2R = OC2R + OptionState;
else
OC2R = OC2R - OptionState;
}
if(MenuItemState == SAVE) //save to EEPROM
{
valblock.SP2ON = OC2R; //store samp puls 2 ON time in ram block
save_vars(); //write ram block to EEPROM
MenuItemState = NORM; //leave SAVE state
}
lcd_clear();
lcd_goto(0);
lcd_puts("S2 PULSE ON AT:\0");
lcd_goto(0x40);
sprintf(lcdBuff30,"%.3lf uS", (OC2R/Fclock)*2000);
lcd_puts(lcdBuff30);
break;
case H:
if(MenuItemState == EDIT)
{
if(QEI_Dir) //up
OC2RS = OC2RS + OptionState;
else
OC2RS = OC2RS - OptionState;
}
if(MenuItemState == SAVE) //save to EEPROM
{
valblock.SP2OFF = OC2RS; //store samp puls 2 ON time in ram block
save_vars(); //write ram block to EEPROM
MenuItemState = NORM; //leave SAVE state
}
lcd_clear();
lcd_goto(0);
lcd_puts("S2 PULSE OFF AT:\0");
lcd_goto(0x40);
sprintf(lcdBuff30,"%.3lf uS", (OC2RS/Fclock)*2000);
lcd_puts(lcdBuff30);
break;
case M:
if(MenuItemState == EDIT)
{
if(QEI_Dir) //up
AUDIOrate = AUDIOrate + OptionState;
else
AUDIOrate = AUDIOrate - OptionState;
}
if(MenuItemState == SAVE) //save to EEPROM
{
valblock.AUDIOrate = AUDIOrate; //store audio rate val in ram block
save_vars(); //write ram block to EEPROM
MenuItemState = NORM; //leave SAVE state
}
lcd_clear();
lcd_goto(0);
lcd_puts("AUDIO RATE Value\0");
lcd_goto(0x40);
sprintf(lcdBuff30,"%u", AUDIOrate);
lcd_puts(lcdBuff30);
break;
default:
lcd_clear();
lcd_goto(0);
lcd_puts("Menu Display Err\0");
while(1); //stop here
}//END switch
}//END if (MenuItemState != OPT)
QEI_Event = 0; //reset the flag .. last thing we do
}//END function

[moodz]

pwm.c

/*
pwm.c - pulse generator for TX etc :-).
Copyright (C) 2011 Paul Moody

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/

//----------------------------------------------------------------------
#include "system.h"
#include <pwm.h>

volatile unsigned int PWMFREQval;
volatile unsigned int PWM1val;
volatile unsigned int PWM2val;
volatile unsigned int PWM3val;


extern struct VALSTORE valblock;

extern volatile long SATdiff;

volatile unsigned long AUDIOsum; //dds sum accumulator for audio generator
volatile unsigned long AUDIOrate; //dds accumulator threshold sum for audio events.


/************************************************** *******************
Function: void __attribute__((__interrupt__)) _PWMInterrupt(void)
************************************************** ******************/
void __attribute__((__interrupt__, auto_psv )) _PWMInterrupt(void)
{
IFS2bits.PWMIF = 0;

TMR2 = 0;

AUDIOsum = AUDIOsum + SATdiff + AUDIOrate;
AUDIOsum = AUDIOsum & 0xffff;
if ((AUDIOsum & 0x1000) == 0x1000)
AUDIO = 1;
else
AUDIO = 0;
return;
}


void __attribute__((__interrupt__ , auto_psv )) _FLTAInterrupt(void)
{
IFS2bits.FLTAIF = 0;
}

/************************************************** *******************
Function: void setupPWM(void)
Summary: Set up basic PWM with complimentary o/p
************************************************** ******************/
void setup_pwm(void)
{
/* PWM interrupt configuration value*/
unsigned int config;

PTCONbits.PTEN = 0; // PWM off
IEC2bits.PWMIE = 0 ; // disable the PWM interrupt

IPC9bits.PWMIP = 7; //highest priority interrupt

//PWMCON2bits.UDIS = 1;
/* Configure pwm interrupt enable/disable and set interrupt priorties */
config = (PWM_INT_DIS & PWM_FLTA_DIS_INT & PWM_INT_PR1 & PWM_FLTA_INT_PR0);

/* clear the Interrupt flags */
IFS2bits.PWMIF = 0;
IFS2bits.FLTAIF = 0;

/* Set priority for the period match */
IPC9bits.PWMIP = (0x0007 & config);

/* Set priority for the Fault A */
IPC10bits.FLTAIP = (0x0070 & config)>> 4;

/* enable /disable of interrupt Period match */
IEC2bits.PWMIE = (0x0008 & config) >> 3;

/* enable /disable of interrupt Fault A.*/
IEC2bits.FLTAIE = (0x0080 & config) >> 7;

SEVTCMP = 0x00;

/* 3 output are independant and enabled */
/// PWMCON1 = (PWM_MOD1_IND & PWM_MOD2_IND & PWM_MOD3_IND & /* independant i/o */
/// PWM_PEN1L & PWM_PEN1H &
/// PWM_PEN2L & PWM_PEN2H &
/// PWM_PEN3L & PWM_PEN3H
/// );
PWMCON1 = (PWM_MOD1_IND & PWM_MOD2_IND & PWM_MOD3_IND & /* independant i/o */
PWM_PEN1L & PWM_PDIS1H &
PWM_PEN2L & PWM_PDIS2H &
PWM_PEN3L & PWM_PDIS3H
);
//The Complementary mode is selected for each PWM I/O pin pair by clearing the appropriate
//PMODx bit in PWMCON1. The PWM I/O pins are set to complementary mode by default upon a
//device reset.

//PWMCON1bits.PMOD1 = 0; // complementary outputs off
//PWMCON1bits.PMOD2 = 0; // complementary outputs off
//PWMCON1bits.PMOD3 = 0; // complementary outputs off

//PWMCON1bits.PEN1H = 0; //enable main PWM1
//PWMCON1bits.PEN2H = 0; //enable main PWM2
//PWMCON1bits.PEN3H = 0; //enable main PWM3

//use lo outputs as digital i/o
//PWMCON1bits.PEN1L = 0; //disable alt PWM1
//PWMCON1bits.PEN2L = 0; //disable alt PWM2
//PWMCON1bits.PEN3L = 0; //disable alt PWM3

PWMCON2 = 0x0004; // SEVOPS<3:0> = 0 (PWM Special Event Trigger Output Postscale Select bits = 1:1 (Not Used))
// IUE = 1 (Updates to the active PDC registers are immediate)
// OSYNC = 0 (Output overrides via the OVDCON register occur on next TCY boundary)
// UDIS = 0 (Updates from duty cycle and period buffer registers are enabled)

SEVTCMP = 50; // special event timer
SEVTCMPbits.SEVTDIR = 1; // special event count direction 0 = trig on up count 1 = trig on down count

DTCON1 = 0x0000; /* Deadtime set to Tcy = 0 ns 6 bits 0 to 63 */
DTCON1bits.DTAPS = 0; /* 0:Tcy 1:2Tcy 2:4Tcy 3:8Tcy 2 bits prescaler for deadtime. */

/* set dead time options, scale = 1, 10*FCY (about 625ns) */
//DTCON1 = PWM_DTAPS1 & PWM_DTA10;

/* set up the fault mode override bits and mode */
FLTACON = PWM_FLTA_MODE_CYCLE &
PWM_FLTA1_DIS &
PWM_FLTA2_DIS &
PWM_FLTA3_DIS &
//PWM_OVA1L_INACTIVE &
PWM_OVA1H_INACTIVE &
//PWM_OVA2L_INACTIVE &
PWM_OVA2H_INACTIVE &
//PWM_OVA3L_INACTIVE &
PWM_OVA3H_INACTIVE ;

/* set special event post scaler, output override sync select and pwm update enable */
PWMCON2 = (PWM_SEVOPS1 & PWM_OSYNC_PWM & PWM_UEN);
//PTCON = (PWM_EN & PWM_IDLE_CON & PWM_OP_SCALE1 & PWM_IPCLK_SCALE1 & PWM_MOD_UPDN);
PTCON = (PWM_EN & PWM_IDLE_CON & PWM_OP_SCALE1 & PWM_IPCLK_SCALE1 & PWM_MOD_FREE);


/////////////////pulse generation

OC1CONbits.OCTSEL = 0; //select timer 2 for output compare 1
OC2CONbits.OCTSEL = 0; //select timer 2 for output compare 2

OC1CONbits.OCM = 5; //100 single 101 continuous
OC2CONbits.OCM = 5; //100 single 101 continuous

/* Configure PWM generators*/
PTPER = valblock.FREQ;
PDC1 = valblock.PWM1;

IEC2bits.PWMIE = 1 ; // enable the PWM interrupt
PTCONbits.PTEN = 1; // turn on the PWM

/* set the pulse parms. Ouput Compare */
OC1R = valblock.SP1ON;
OC1RS = valblock.SP1OFF;

OC2R = valblock.SP2ON;
OC2RS = valblock.SP2OFF;

}

[moodz]

main_loop.c

/*
main_loop.c - this executes all the time :-).
Copyright (C) 2011 Paul Moody

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h> // for PI etc
#include "system.h"
////////////////////////////
#define TIMER TRUE
////////////////////////////
unsigned int Butt1Event;
unsigned int Butt2Event;
unsigned int Butt3Event;

extern short int rxrdy; // flag to indicate a line of data is available in buffer

extern struct VALSTORE valblock;

double Fclock = 7370.000; //master clock frequency in KHz (internal RC)

long ADCval;
long ADCvalSamp;
unsigned int ADCvalCount;
unsigned int ADCvalCountMax;
long ADCvalSAT;
long ADCvalSATsamp;
volatile int SATdiff;
unsigned int ADCvalSATcount;
unsigned int ADCvalSATcountMax;

extern volatile unsigned int AUDIOrate; //dds accumulator threshold sum for audio events.

extern volatile unsigned char QEI_Dir;
extern volatile int QEI_Event;

extern unsigned int MenuState;
extern unsigned int MenuItemState;
extern unsigned int OptionSelect;
extern void process_QEI(void);


extern void process_serial_buffer(void);
extern void process_QEI(void);

extern char lcdBuff30[30];
extern void lcd_clear(void);
extern void lcd_putc(const char);
extern void lcd_puts(const char *);
extern void lcd_goto(unsigned char);
extern void lcd_test(void);
extern void setup_lcd(void);

extern void delay_tmr1(unsigned int);

void SATdiffLCD(void);
void SATlevelLCD(void);


//================================================== ===========================
// local global vars used by this program
//================================================== ===========================

void main_loop(void)
{
//////////////////////////////////
#ifdef TIMER
int timeout = 20;
#endif
//////////////////////////////////

int LCDcycle = 0;

lcd_goto(0);
lcd_puts(VERSION);
lcd_goto(0x40);
lcd_puts("Press ZERO to GO\0");
lcd_goto(0);

while (ZEROBUTT == 1); //wait for button press
lcd_clear();

while (1)
{
ADCvalCount = 0; //reset the running sum count
while (ADCvalCount < 16384) //oversampling 16384=7bit 4096x=6bit 1024X=5bit 256X=4bit 64X=3bit 16X=2bit 4X=1bit 1X=0bit
{
if (ADCON1bits.DONE == 1)
{
if (ADCON2bits.BUFS) //bank convert
{
ADCval += (long)ADCBUF0;
ADCval += (long)ADCBUF1;
ADCval += (long)ADCBUF2;
ADCval += (long)ADCBUF3;
ADCval += (long)ADCBUF4;
ADCval += (long)ADCBUF5;
ADCval += (long)ADCBUF6;
ADCval += (long)ADCBUF7;
}
else
{
ADCval += (long)ADCBUF8;
ADCval += (long)ADCBUF9;
ADCval += (long)ADCBUFA;
ADCval += (long)ADCBUFB;
ADCval += (long)ADCBUFC;
ADCval += (long)ADCBUFD;
ADCval += (long)ADCBUFE;
ADCval += (long)ADCBUFF;
}
ADCvalCount += 8;
} //END if (ADCON2bits.BUFS)
} // end while

//////// check for serial or QEI /////
if (rxrdy)
process_serial_buffer();
if (QEI_Event)
process_QEI();
//////////////////////////////////////

if (SELECTBUTT == 0) Butt1Event++;
if (ZEROBUTT == 0) Butt2Event++;

if((Butt1Event > DEBOUNCE) & (SELECTBUTT == 1)) //button has been pressed AND released
{
if (MenuItemState != RUN)
{
if (MenuItemState != OPT)
MenuItemState = OPT; //go from current state to OPTion state
else
MenuItemState = OptionSelect; //go from OPTion to selected option ( NORM / EDIT / SAVE etc )

if(MenuItemState == RUN) //special update for LCD if RUN selected because SAT is slow to update below.
SATlevelLCD();
}
else
MenuItemState = NORM;
Butt1Event = 0; //reset the butt event
process_QEI(); //update LCD with menu state
}

if (MenuItemState == RUN)
{
LCDcycle++; //do the LCD RUN vals every X ADC samples and if we are in RUN state
if (LCDcycle > 15)
{
SATdiffLCD();
LCDcycle = 0;
}
}

ADCvalSamp = ADCval>>8; //store the running sum for ADC samples

if(ZEROBUTT == 0) //if ZEROBUTT button pressed then set the SAT to the current val
ADCvalSATsamp = ADCvalSamp;
PDC3 = SATdiff + PTPER; //update the PWM target val ( PTPER sets mid scale )
ADCvalSAT += ADCvalSamp; //update the SAT sum
ADCvalSATcount++;
if (ADCvalSATcount > 1023)
{
ADCvalSATsamp = ADCvalSamp;
/////////////////////////////////////////
#ifdef TIMER
if(TIMER) //test timeout true or false
timeout--;
if ((timeout == 0) & (MenuItemState != RUN))
MenuItemState = RUN;
else
timeout = 20;
#endif
/////////////////////////////////////////
//if(SATLOCKBUTT == 1) //if SATLOCKBUTT button NOT pressed update the SAT value
//{
// ADCvalSATsamp = ADCvalSAT>>11; //right shift SAT sum to match with ADCval sum
// SATdiffAVG = SATdiffAVG>>11; //right shift SAT diffAVG
// SATdiffAVG = SATdiffAVG>>1;
// ADCvalSAT = ADCvalSAT>>1;
//}

////update the SAT LCD value
if (MenuItemState == RUN)
SATlevelLCD();

ADCvalSATcount=0; //reset the count
}

SATdiff = ADCvalSATsamp - ADCvalSamp; //Do the SAT diff update
ADCval = ADCval>>1; //reinitialise the running sum to half the previous
}//END while(1)
}


void SATdiffLCD(void)
{
lcd_goto(0);
sprintf(lcdBuff30,"SIG:%+.6lf ", SATdiff*(5.0/0x1ffff)); //nb : trailing spaces clear display :-)
lcd_puts(lcdBuff30);
}

void SATlevelLCD(void)
{
lcd_goto(0x40);
sprintf(lcdBuff30,"SAT: %.6lf ", ADCvalSATsamp*(5.0/0x1ffff)); //nb : trailing spaces clear display :-)
lcd_puts(lcdBuff30);
}

[moodz]

main.c

/*
main.c - this executes first :-).
Copyright (C) 2011 Paul Moody

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/
#include "system.h"
#include <libpic30.h>
#include <p30f4012.h>
#include <stdio.h>

extern void main_loop(void);

_FOSC(CSW_FSCM_OFF & FRC_PLL16 ); // 7.3mhz * 16 / 4 = 29 mips on internal rc osc
_FWDT(WDT_OFF); // wdt off

/* enablebrownout @4.2v, 64ms powerup delay, MCLR pin active */
//_FBORPOR(PBOR_ON & BORV_42 & PWRT_64 & MCLR_EN & RST_PWMPIN & PWMxH_ACT_HI & PWMxL_ACT_HI );

/* enablebrownout @4.2v, 64ms powerup delay, MCLR pin NOT active */
_FBORPOR(PBOR_ON & BORV_42 & PWRT_64 & MCLR_DIS & PWMxL_ACT_HI);

#ifdef __DEBUG // secret squirrel code protect ... too bad this is open source ;-)
_FGS( CODE_PROT_OFF & GWRP_OFF );
#else
_FGS( CODE_PROT_ON & GWRP_ON);
#endif

//----------------------------------------------------------------------
extern void read_vars(void);
extern void setup_TMR1(void);
extern void setup_TMR2(void);
extern void setup_TMR3(void);
extern void QEI_Setup(void);

extern unsigned int MenuState;
extern unsigned int MenuItemState;
extern unsigned int OptionState;
extern unsigned int OptionSelect;

extern void setup_uart(void);
extern void WriteUART_to_RS232(void);
extern void buff2uart(unsigned char *);

extern void ADCResultToDecimal(unsigned int);

extern volatile unsigned short int timer_test;

extern void setup_pwm(void);

extern void ADC_Init(void);

char buff30[30];

extern void setup_lcd(void);

void __attribute__((__interrupt__ , auto_psv)) _StackError (void)
{
while (1)
{
AUDIO = 1;
AUDIO = 0;
AUDIO = 0;
AUDIO = 0;
}
}

void __attribute__((__interrupt__ , auto_psv)) _AddressError (void)
{
while (1)
{
AUDIO = 1;
AUDIO = 1;
AUDIO = 0;
AUDIO = 0;
}
}

void __attribute__((__interrupt__ , auto_psv)) _MathError (void)
{
while (1)
{
AUDIO = 1;
AUDIO = 0;
AUDIO = 1;
AUDIO = 0;
}
}

/************************************************** *******************
Function: void setup_io(void)
Summary: Set up basic io pins and modes on chip
************************************************** ******************/
void setup_io(void)
{
// PORT B
ADPCFG = 0xffff; // make sure analog doesnt grab encoder pins (all digital)
ADPCFGbits.PCFG0 = 0; // AN0 output
ADPCFGbits.PCFG1 = 0; // AN1 output
ADPCFGbits.PCFG2 = 0; // AN2 output
// 0=output, 1=input
_TRISB0 = 0; // Pin 2 LCD D0
_TRISB1 = 0; // Pin 3 LCD D1
_TRISB2 = 0; // Pin 4 LCD D2
_TRISB3 = 1; // Pin 5 Analogue input
_TRISB4 = 1; // used by quad encoder input ch A
_TRISB5 = 1; // used by quad encoder input ch B

// PORT C // 0=output, 1=input
_TRISC13 = 1; // SELECT Button
_TRISC14 = 1; // ZERO Button
_TRISC15 = 1; // SATLOCK Button

// PORT D // 0=output, 1=input
_TRISD0 = 0; // SAMPLE 1
_TRISD1 = 0; // SAMPLE 2

// PORT E // 0=output, 1=input
_TRISE0 = 0; // PWM1L OUT
_TRISE1 = 0; // LCD RS
_TRISE2 = 0; // PWM2L OUT
_TRISE3 = 0; // LCD D7
_TRISE4 = 0; // PWM3L OUT
_TRISE5 = 0; // LCD EN
_TRISE8 = 0; // AUDIO OUT

// PORT F // 0=output, 1=input
_TRISF2 = 1; // PGC used by icsp/UART RX
_TRISF3 = 0; // PGD used by icsp/UART TX
}


/************************************************** *******************
Function: int main(void)
Summary: execute this first :-) calls everything else
************************************************** ******************/
int main(void)
{
MenuState = A; // startup LCD menu
MenuItemState = RUN;
OptionState = OptNORM;
OptionSelect = OptNORM;

setup_pwm(); // start PWM output -- cannot set PWM vars till setup done ???!!
read_vars(); // get all the vars from EEPROM
setup_io(); // make all i/o pins go the right dir
setup_uart(); // setup the serial interface to the PC
setup_lcd(); // setup LCD display

setup_TMR2(); // set up timer 2
setup_TMR3(); // set up timer 3
IEC0bits.T1IE = 0; // disable interrupts for timer 1
IEC0bits.T2IE = 0; // disable interrupts for timer 2
IEC0bits.T3IE = 0; // disable interrupts for timer 3

QEI_Setup(); // start the rotary encoder
ADC_Init(); // start the ADC up
main_loop(); // main loop
return 0; // should not arrive here ... AAAAARGH!
}

[moodz]

lcd.c

/*
lcd.c - LCD routines.
Copyright (C) 2011 Paul Moody

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/
/*
* This code will interface to a standard LCD controller
* like the Hitachi HD44780. 4 bit mode.
*
* Set up the port I/O on PIC,
* call lcd_init(),other routines as required.
*
*/
#include <stdio.h>
#include "system.h"

extern void setup_TMR1(void);
extern void delay_tmr1(unsigned int);

char lcdBuff30[30];

// I/O for LCD
#define LCD_RS _RE1 /* register select */
#define LCD_EN _RE5 /* enable */
#define LCD_D0 _RB0
#define LCD_D1 _RB1
#define LCD_D2 _RB2
#define LCD_D3 _RE3

/* strobe the enable pin */
void lcd_strobe(void)
{
delay_tmr1(10);
LCD_EN = 1;
delay_tmr1(10);
LCD_EN = 0;
}

/* write a byte to the LCD in 4 bit mode */
void lcd_write(unsigned char c)
{
int va, vb;
//hi order nibble
va = PORTB & 0xfff8;
vb = (int) (c>>4) & 0x0007;
PORTB = va | vb;
va = PORTE & 0xfff7;
vb = (int) (c>>4) & 0x0008;
PORTE = va | vb;
lcd_strobe();

//lo order nibble out
va = PORTB & 0xfff8;
vb = (int) c & 0x0007;
PORTB = va | vb;
va = PORTE & 0xfff7;
vb = (int) c & 0x0008;
PORTE = va | vb;
lcd_strobe();

//short delay
//delay_tmr1(10);
delay_tmr1(1);
}

/*
* Clear and home the LCD
*/
void lcd_clear(void)
{
LCD_RS = 0;
lcd_write(0x1);
delay_tmr1(1);
}

/* write a single char to the LCD */
void lcd_putc(const char c)
{
LCD_RS = 1; // write chars
lcd_write(c);
}

/* write a string of chars to the LCD */
void lcd_puts(const char * s)
{
LCD_RS = 1; // write chars
while(*s)
lcd_write(*s++);
}

/*
* Go to specified cursor position
*/
void lcd_goto(unsigned char pos)
{
LCD_RS = 0;
//delay_tmr1(10);
delay_tmr1(1);
lcd_write(0x80+pos);
}

/* initialise the LCD - put into 4 bit mode */
void setup_lcd(void)
{

LCD_EN = 0; // enable lo ... bytes clocked in by lcd_strobe
LCD_RS = 0; // write control byte mode

//poweron delay
delay_tmr1(200);
lcd_write(0x02);
delay_tmr1(200);
lcd_write(0x80);
lcd_write(0x2;
lcd_write(0x2; // 4 bit mode, 2 line mode, 5x7 font
lcd_write(0x0; // display off
lcd_write(0x0c); // display on, ul off, blink off
lcd_write(0x06); // entry mode = incr, no shift
lcd_write(0x02); // display and home cursor
// delay 5ms
delay_tmr1(5);

}

[moodz]

eeprom_rw.s

; general config for dsPIC30xxx in MPLAB

.include "p30fxxxx.inc"

; compile for absolute C address
; if not needed, comment this line

.equ absolute_C_address, 1

.global _WriteWord
.global _ReadWord

;------ eeprom address
; NEW
; conditionals for developing (30F4012), (30F6013) and (30F5014A)

.ifdef __30F4012
.equiv EEPROM_SIZE, 0x3ff
.equiv ADDRESS_HI, 0x007F
.equiv ADDRESS_LO, 0xfC00
.endif

.ifdef __30F5013
.equiv EEPROM_SIZE, 0x3ff
.equiv ADDRESS_HI, 0x007F
.equiv ADDRESS_LO, 0xfC00
.endif

.ifdef __30F6014A
.equiv EEPROM_SIZE, 0xfff
.equiv ADDRESS_HI, 0x007F
.equiv ADDRESS_LO, 0xf000
.endif

;------ Memory opType.

.equiv ERASE_WORD, 0x4044
.equiv WRITE_WORD, 0x4004

;------ Write a word to eeprom

_WriteWord:
push w4
mov #ADDRESS_HI,w4
mov w4,TBLPAG
mov w4,NVMADRU
mov #ADDRESS_LO,w4

.ifdef absolute_C_address
sub w0,w4,w0
.endif

sl w0,#1,w0
add w0,w4,w0
mov w0,NVMADR
rcall EraseWord
mov #WRITE_WORD,w4
mov w4,NVMCON
TBLWTL w1,[w0]
rcall KeySequence
pop w4
return

;------ Read a word from eeprom

_ReadWord:
push w4
mov #ADDRESS_HI,w4
mov w4,TBLPAG
mov w4,NVMADRU
mov #ADDRESS_LO,w4
mov w4,NVMADR

.ifdef absolute_C_address
sub w0,w4,w0
.endif

sl w0,#1,w0
add w0,w4,w4
tblrdl [w4],w0
pop w4
return

;------ Erase a word from eeprom

EraseWord:
mov #ERASE_WORD,w4
mov w4,NVMCON

;------ Required key sequence for write or erase.

KeySequence:
disi #16
mov #0x55,w4
mov w4,NVMKEY
mov #0xaa,w4
mov w4,NVMKEY
bset NVMCON,#WR
nop
nop
K1wait: btsc NVMCON,#WR
bra K1wait
return

.end

;------ End of file.

[moodz]

ADC.c

/*
ADC.c - Analog to Digital converter routines.
Copyright (C) 2011 Paul Moody

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/

#include "p30fxxxx.h"
#include "system.h"

//Functions and Variables with Global Scope:

unsigned int ADbuff_count = 0; // A buff filter count ....0 to BUFFSIZ
unsigned int ADbuff_count_max = 128; // max size to fill buffer ... default is 128
unsigned int ADbuff_cycle = 0; // A buff filter cycle ....0 to AVGVAL
unsigned int ADref_cycle = 0; // Auto track cycle

unsigned int DUMP_STATE = 0;

unsigned int ADtemp = 0;

void ADC_Init(void);
void __attribute__((__interrupt__)) _ADCInterrupt(void);

extern volatile unsigned int PR1Delay;
extern volatile unsigned int PR2Delay;
extern volatile unsigned int PR3Delay;
extern volatile unsigned int PR1Duty;
extern volatile unsigned int PR2Duty;
extern volatile unsigned int PR3Duty;

//The input pin being acquired and converted is AN3.
void ADC_Init(void)
{
//ADbuff_ptr = (long volatile *) &ADbuff;; //initialise ADC int buff ptr to start of buffer.

//ADCON1 Register
//Set up A/D for Automatic Sampling
//Use internal counter (SAMC) to provide sampling time
//number format.
//Set up Sequential sampling for multiple S/H amplifiers
//All other bits to their default state
ADCON1bits.FORM = 0; //Set up A/D conversion results to be read in integer
ADCON1bits.SSRC = 7;
ADCON1bits.ASAM = 1; //Automatic sampling
ADCON1bits.SIMSAM = 0;


//ADCON2 Register
//Set up A/D for interrupting after 8 samples get filled in the buffer 0 - 7
//then int when 8 samples filled to buffer 8 - F (15)
//Set up to sample on 2 S/H amplifiers - CH0 and CH1
//All other bits to their default state
ADCON2bits.BUFM = 1; //select two banks of 8 ADC result registers for alternate filling
ADCON2bits.SMPI = 7; //generate an interrupt on every 8 buffer vals filled
ADCON2bits.CHPS = 1;
ADCON2bits.VCFG = 0; //Internal ref Ideally use external references ...3

//ADCON3 Register
//We would like to set up a sampling rate of 1 MSPS
//Total Conversion Time (tad ) = 154 ns
//At 29.4 MIPS, Tcy = 33.9 ns = Instruction Cycle Time
//The A/D converter will take 12*Tad periods to convert each sample
//So for ~1 MSPS we need to have Tad close to 83.3ns
//Using equation in the Family Reference Manual we have
//ADCS = 2*Tad/Tcy - 1
//ADCS = 2*154/33.9 - 1 = 8
ADCON3bits.SAMC = 0; // approx 1MHz sample rate
//ADCON3bits.SAMC = 10; // approx 100khz sample rate
ADCON3bits.ADCS = 9; //84 ns sample tad

//ADCHS Register
//Set up A/D Channel Select Register to convert AN3 on Mux A input
//of CH0 and CH1 S/H amplifiers
ADCHS = 0x0023;

//ADCSSL Register
//Channel Scanning is disabled. All bits left to their default state
ADCSSL = 0x0000;

//ADPCFG Register
//Set up channels AN3 as analog input and configure rest as digital
//Recall that we configured all A/D pins as digital when code execution
//entered main() out of reset
ADPCFG = 0xFFFF;
ADPCFGbits.PCFG3 = 0;

//Clear the A/D interrupt flag bit
IFS0bits.ADIF = 0;

//Disable A/D interrupt
IEC0bits.ADIE = 0;

//Turn on the A/D converter
//This is typically done after configuring other registers
ADCON1bits.ADON = 1;

}

void __attribute__((__interrupt__, auto_psv)) _ADCInterrupt(void)
{
//unsigned int buffptr;
//Clear the A/D Interrupt flag bit or else the CPU will
//keep vectoring back to the ISR
IFS0bits.ADIF = 0;
}

[moodz]

README.TXT

moodz UNIPI copyright 2011 by Paul Moody. [email protected]

Universal PI chip source code.

Distributed under GPL3 licence.

Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
Preamble

The GNU General Public License is a free, copyleft license for software and other kinds of works.

The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.

When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.

To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others.

For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.

Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License giving you legal permission to copy, distribute and/or modify it.

For the developers' and authors' protection, the GPL clearly explains that there is no warranty for this free software. For both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not be attributed erroneously to authors of previous versions.

Some devices are designed to deny users access to install or run modified versions of the software inside them, although the manufacturer can do so. This is fundamentally incompatible with the aim of protecting users' freedom to change the software. The systematic pattern of such abuse occurs in the area of products for individuals to use, which is precisely where it is most unacceptable. Therefore, we have designed this version of the GPL to prohibit the practice for those products. If such problems arise substantially in other domains, we stand ready to extend this provision to those domains in future versions of the GPL, as needed to protect the freedom of users.

Finally, every program is threatened constantly by software patents. States should not allow patents to restrict development and use of software on general-purpose computers, but in those that do, we wish to avoid the special danger that patents applied to a free program could make it effectively proprietary. To prevent this, the GPL assures that patents cannot be used to render the program non-free.

The precise terms and conditions for copying, distribution and modification follow.
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END OF TERMS AND CONDITIONS

[moodz]

yes this is it .... since there are no other decent open source PI controller chips around the following posts contain the UNIPI universal PI chip source code.

Features ..
LCD display and menu.
Rotary encoder menu selection.
Dual sample pulses.
Serial console menu.
etc etc.

Everything you need to make a PI controller chip or modify for your own purposes.

The complete source code files as follows ....

ADC.c
eeprom_rw.s
lcd.c
main.c
main_loop.c
pwm.c
QEImenu.c
RS232menu.c
serial.c
timers.c
vars.c

system.h

README.TXT

builds under MPLAB IDE v8.66 (C30 v3.25)

enjoy ... moodz.