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**moodz** · 09-16-2011, 01:10 PM

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.
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END OF TERMS AND CONDITIONS

**moodz** · 09-16-2011, 01:12 PM

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** · 09-16-2011, 01:14 PM

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** · 09-16-2011, 01:15 PM

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** · 09-16-2011, 01:16 PM

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** · 09-16-2011, 01:17 PM

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** · 09-16-2011, 01:18 PM

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** · 09-16-2011, 01:18 PM

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** · 09-16-2011, 01:20 PM

RS232menu.c

/*
RS232menu.c - serial comms and terminal 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 "system.h"
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

extern char rxbuff[]; // global rx buffer for serial data
extern char *rxbuffptr; // local input ptr for storing data
extern short int rxrdy; // flag to indicate a line of data is available in buffer

extern double Fclock; //input clock frequency in KHz

extern struct VALSTORE valblock;
extern struct VALSTORE _EEDATA(32) eeblock;

extern long ADCval;
extern long ADCvalSamp;
extern unsigned int ADCvalCount;
extern unsigned int ADCvalCountMax;

extern long ADCvalSATsamp;
extern int SATdiff;
extern unsigned int ADCvalSATcountMax;
extern volatile unsigned int AUDIOrate; //dds accumulator threshold sum for audio events.

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 unsigned int PWMscale; //scale value for PWM modulation val/scale

void process_serial_buffer()
{
switch( rxbuff[0] )
{
case 'A':
sscanf(&rxbuff[1],"%u",&valblock.FREQ);
if (valblock.FREQ < 737) valblock.FREQ = 737; //need this limit or would have non stop PWM interrupts
if (valblock.FREQ > 32767) valblock.FREQ = 32767; //max 15 bits
PTPER = valblock.FREQ;
PDC2 = PTPER>>5;
break;
case 'B':
sscanf(&rxbuff[1],"%d",&valblock.PWM1);
PDC1 = valblock.PWM1;
break;
case 'C':
sscanf(&rxbuff[1],"%d",&valblock.PWM2);
//PDC2 = valblock.PWM2;
break;
case 'E':
sscanf(&rxbuff[1],"%d",&valblock.SP1ON);
OC1R = valblock.SP1ON;
break;
case 'F':
sscanf(&rxbuff[1],"%d",&valblock.SP1OFF);
OC1RS = valblock.SP1OFF;
break;
case 'G':
sscanf(&rxbuff[1],"%d",&valblock.SP2ON);
OC2R = valblock.SP2ON;
break;
case 'H':
sscanf(&rxbuff[1],"%d",&valblock.SP2OFF);
OC2RS = valblock.SP2OFF;
break;
case 'K':
sscanf(&rxbuff[1],"%d",&valblock.ADCscale);
valblock.ADCscale = valblock.ADCscale & 0x000f;
break;
case 'M':
sscanf(&rxbuff[1],"%u",&valblock.AUDIOrate);
AUDIOrate = valblock.AUDIOrate;
break;
case 'X':
sscanf(&rxbuff[1],"%lf",&Fclock);
break;
case 'S':
save_vars();
if((calc_cksum(sizeof(struct VALSTORE), (int *) &valblock)) == (calc_EE_cksum(sizeof(struct VALSTORE), (int *) &eeblock)))
printf("\r\nEEPROM save OK : CHECKSUM OK\r\n");
else
printf("\r\n!!!!EEPROM save FAILED : CHECKSUM ERROR!!!!\r\n");
break;
case 'R':
read_vars();
break;

default:
printf("\r\nEnter a command : eg A1234 sets Tx freq count to 1234\r\n");
}
printf("\r\n");
printf(VERSION);
printf("\r\n");
printf("S: Save all vars to EEPROM\r\n");
printf("R: Read all vars from EEPROM\r\n");
printf(" CHECKSUM: RAM = %i EEPROM = %i\r\n",(calc_cksum((sizeof(struct VALSTORE)), (int *)&valblock)),(calc_EE_cksum((sizeof(struct VALSTORE)), (int *)&eeblock)));
printf(" STATUS:\r\n");
printf("X: CPU Ref Clock : 4 X %.3lf Khz = %.3lf Mhz\r\n",Fclock, 4*Fclock/1000);
printf(" PWM Step is %.3lf Nanosecond\r\n",1000000/(Fclock * 4));
printf("A: TX FREQUENCY : Count = %u Freq = %.3lf Khz Period = %.3lf usec\r\n",PTPER, (Fclock * 4)/PTPER, (PTPER/(Fclock * 4))*1000);
printf("B: TX PRIMARY PULSE : Count = %u Duty = %.3lf usec\r\n",PDC1, (PDC1/(Fclock *

)*1000);
printf("C: TX DESCRIM PULSE : Count = %u Duty = %.3lf usec\r\n",PDC2, (PDC2/(Fclock *

)*1000);
printf(" PWM3 TARGET level : Count = %u Duty = %.3lf usec\r\n",PDC3, (PDC3/(Fclock *

)*1000);
printf("E: SAMPLE PULSE 1 ON : Count = %u ON = %.3lf usec\r\n", OC1R, (OC1R/Fclock)*2000);
printf("F: SAMPLE PULSE 1 OFF : Count = %u OFF = %.3lf usec width = %.3lf usec\r\n", OC1RS, (OC1RS/Fclock)*2000, ((OC1RS - OC1R)/Fclock)*2000);
printf("G: SAMPLE PULSE 2 ON : Count = %u ON = %.3lf usec\r\n", OC2R, (OC2R/Fclock)*2000);
printf("H: SAMPLE PULSE 2 OFF : Count = %u OFF = %.3lf usec width = %.3lf usec\r\n", OC2RS, (OC2RS/Fclock)*2000, ((OC2RS - OC2R)/Fclock)*2000);
printf("K: TARGET PWM scale : %u\r\n", valblock.ADCscale);
printf(" ADC sample = %lu [%.6lf Volts]\r\n", ADCvalSamp, ADCvalSamp*(5.0/0x1ffff));
printf(" ADC SAT sample = %lu [%.6lf Volts] DIFF = %d [%.6lf Volts]\r\n", ADCvalSATsamp, ADCvalSATsamp*(5.0/0x1ffff), SATdiff, SATdiff*(5.0/0x1ffff));
printf("M: AUDIO freq range count = %u\r\n", valblock.AUDIOrate);
printf("SELECT Button: %u ZERO Button: %u SAT LOCK Button: %u\r\n", SELECTBUTT, ZEROBUTT, SATLOCKBUTT);
// reset input buffer state
rxrdy = 0;
rxbuff[0] = 0;
rxbuffptr = &rxbuff[0];
putchar('>');
}

**moodz** · 09-16-2011, 01:20 PM

serial.c

/*
serial.c - rs232 comms functions :-).
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 <uart.h>
#include <libpic30.h>

#define BAUDRATE 9600 //Desired Baud Rate
//#define BAUDRATE 38400 //Desired Baud Rate
#define BRGVAL ((FCY/BAUDRATE)/16)-1 //Formula for U1BRG register
//from dsPIC30F Family
//Reference Manual

//Functions and Variables with Global Scope:
char *UARTCharPtr;

char rxbuff[30]; // global rx buffer for serial data
char txbuff[30] = "\r\n UNIPI \r\n\0"; // global tx buffer for serial data
char *rxbuffptr; // local input ptr for storing data
short int rxrdy; // flag to indicate a line of data is available in buffer

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

void UART_FlushRX(void);
char UART_GetChar(void);

void UART_PutChar(char);
int write(int, void *, unsigned int);
int __C30_UART = 2;

void __attribute__((__interrupt__, auto_psv)) _U1TXInterrupt(void);
void __attribute__((__interrupt__,auto_psv)) _U1RXInterrupt (void);

volatile unsigned int rs232busyflag; //flags that the tx buffer not empty yet

//Functions
//************************************************** ************************
//* Configure the USART
// the default stdin,stdout are directed to serial port 1
//************************************************** ************************

//UART_Init() sets up the UART for a 8-bit data, No Parity, 1 Stop bit
//at 9600 baud with transmitter interrupts enabled
void setup_uart(void)
{
U1MODE = 0x0000; //Clear UART1 registers
U1STA = 0x0000;

//U1MODEbits.ALTIO = 1; //use U1ATX and U1ARX instead of
//U1TX and U1RX pins
U1MODEbits.ALTIO = 0; //use U1TX and U1RX pins

U1MODEbits.UARTEN = 1; //Enable UART1 module
U1BRG = BRGVAL; //Load UART1 Baud Rate Generator

IFS0bits.U1RXIF = 0; //Clear UART1 Receiver Interrupt Flag
IFS0bits.U1TXIF = 0; //Clear UART1 Transmitter Interrupt Flag
IEC0bits.U1RXIE = 0; //Disable UART1 Receiver ISR
IEC0bits.U1TXIE = 1; //Enable UART1 Transmitter ISR
U1STAbits.UTXISEL = 1; //Setup UART1 transmitter to interrupt
//when a character is transferred to the
//Transmit Shift register and as result,
//the transmit buffer becomes empty.

U1STAbits.UTXEN = 1; //Enable UART1 transmitter
UARTCharPtr = &txbuff[0]; //Initialize UARTCharPtr to point
//to the first character in the Display buffer

U1STA = UART_TX_ENABLE & UART_TX_PIN_NORMAL; // TX & RX interrupt modes
U1STAbits.URXISEL = 0; // rx intr every ch

rxbuffptr = &rxbuff[0];
rxbuff[0] = 0;
rxrdy = 0;

IFS0bits.U1RXIF = 0;
IEC0bits.U1RXIE = 1; // go live with serial rx intr
}

//WriteUART_to_RS232() triggers interrupt-driven UART communication by writing
//the first character in the Display buffer to the UART Transmit register
void buff2uart(char * ptr)
{
rs232busyflag = 1;
UARTCharPtr = ptr; //Re-Initialize UART display
U1TXREG = *UARTCharPtr++; //Load the UART transmit register with first character
IFS0bits.U1TXIF = 0; //Clear the UART1 transmitter interrupt flag
while (rs232busyflag); //flags that the tx buffer not empty yet
}

//_U1TXInterrupt() is the UART1 Interrupt Service Routine.
//The routine must have global scope in order to be an ISR.
//The ISR name is the same name provided for the module in the device linker
//script.
//The UART1 ISR loads the UART1 4-deep FIFO buffers with the next
//4 characters in the Display buffer unless it encounters a null character.
void __attribute__((__interrupt__, auto_psv)) _U1TXInterrupt(void)
{
int i = 0;
while (i < 4)
{
if (*UARTCharPtr == '\0')
{
rs232busyflag--;
break;
}
else
{
U1TXREG = *UARTCharPtr++;
i++;
}
}
IFS0bits.U1TXIF = 0; //Clear the UART1 transmitter interrupt flag
}

int write(int handle, void *buffer, unsigned int len)
{
int i;
switch (handle)
{
case 0: // handle 0 corresponds to stdout
case 1: // handle 1 corresponds to stdin
case 2: // handle 2 corresponds to stderr
default:
for (i=0; i<len; i++)
UART_PutChar(*(char*)buffer++);
}
return(len);
}

void UART_PutChar(char c)
{
while (U1STAbits.UTXBF); // Wait for space in UART2 Tx buffer
U1TXREG = c; // Write character to UART2
}

char UART_GetChar()
{
while (!U1STAbits.URXDA);
return U1RXREG;
}

void UART_FlushRX()
{
unsigned char c;
while (!U1STAbits.URXDA)
c = U1RXREG;
}

/************************************************** *******************
Function: void __attribute__((__interrupt__)) _U1RXInterrupt (void)
Summary: Handles uart rx interrupt
************************************************** ******************/

void __attribute__((__interrupt__,auto_psv)) _U1RXInterrupt (void)
{
char ch;

IFS0bits.U1RXIF = 0;

while (U1STAbits.URXDA)
{
ch = U1RXREG & 0xFF;
// save the character if there is room in the input buffer
if ( ch == 0x0a )
continue; // strip LF

if ( ch == 0x0d )
{
// end of input stream..
// flag we have something to process
*rxbuffptr = 0; // null terminate buffer
rxrdy = 1;
break;
}

// if we have room in the buffer, store the ch for later processing
if (rxbuffptr < (&rxbuff[0] + sizeof(rxbuff) - 2 ))
{
// still working on filling buffer
*rxbuffptr++ = ch;
UART_PutChar(ch);
}
}
}

**moodz** · 09-16-2011, 01:21 PM

timers.c

/*
timers.c - hardware timer functions.
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"

volatile unsigned int timer1_count;

/************************************************** *******************
Function: void __attribute__((__interrupt__)) _T1Interrupt (void)
************************************************** ******************/

void __attribute__((__interrupt__ , auto_psv)) _T1Interrupt (void)
{

IFS0bits.T1IF = 0;

if ( timer1_count == 0 )
T1CONbits.TON = 0; //timer 1 off.
else
{
TMR1 = 0;
timer1_count--;
}
}

/************************************************** *******************
Function: void __attribute__((__interrupt__)) _T2Interrupt (void)
************************************************** ******************/

void __attribute__((__interrupt__ , auto_psv)) _T2Interrupt (void)
{
IFS0bits.T2IF = 0;
T2CONbits.TON = 0; //timer 2 off.
}

/************************************************** *******************
Function: void __attribute__((__interrupt__)) _T3Interrupt (void)
************************************************** ******************/

void __attribute__((__interrupt__ , auto_psv)) _T3Interrupt (void)
{
IFS0bits.T3IF = 0;
T3CONbits.TON = 0; //timer 3 off.
}

/************************************************** *******************
Function: void setupTMR1(void)
************************************************** ******************/

void setup_TMR1(void)
{
IPC0bits.T1IP = 6; //lowest priority interrupt
T1CONbits.TCKPS = 0; // timer 1 prescale = 1
TMR1 = 0;
PR1 = (737 * 4); //set timer preset
//T1CON = 0x0000; //internal Tcy/1 clock
IFS0bits.T1IF = 0; //interupt flag clear
IEC0bits.T1IE = 1; //Enable Timer1 Interrupt Service Routine
T1CONbits.TON = 1; //timer 1 on
return;
}

/************************************************** *******************
Function: void setupTMR2(void)
************************************************** ******************/

void setup_TMR2(void)
{
IEC0bits.T2IE = 0; // Disable Timer2 Interrupt Service Routine
T2CONbits.TCKPS = 1; // timer 2 prescale = 8
TMR2 = 0;
PR2 = 2000;
T2CONbits.TON = 1; //timer 2 on
return;
}
/************************************************** *******************
Function: void setupTMR3(void)
************************************************** ******************/

void setup_TMR3(void)
{
IEC0bits.T3IE = 0; // Disable Timer3 Interrupt Service Routine
T3CON = 0x0000; // internal Tcy/1 clock
TMR3 = 0;
PR3 = 2500;
T3CONbits.TON = 0; // timer 3 off
return;
}

/************************************************** *******************
Function: void delay_tmr1(unsigned int)
************************************************** ******************/

/* delay routine */
void delay_tmr1(unsigned int delay)
{
timer1_count = delay;
setup_TMR1();
while(timer1_count);
}

**moodz** · 09-16-2011, 01:22 PM

vars.c

/*
vars.c - save and read variables from eeprom.
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 "p30fxxxx.h"
#include "system.h"

extern unsigned int AUDIOrate;

struct VALSTORE _EEDATA(32) eeblock; //EE size request must be power of 2
volatile struct VALSTORE valblock;

int calc_cksum(int, int *);
extern int cksum_OK(int, int *);

unsigned int PWMscale;

extern int WriteWord(int *, int);
extern int ReadWord(int *);

void read_vars(void)
{
int i;
int * source = (int *) &eeblock;
int * dest = (int *) &valblock;

for (i=0; i < sizeof(struct VALSTORE); i++)
*(dest++) = ReadWord(source++);
//make sure there is a valid TX PWM rate :-)
if ((valblock.FREQ <= 7370) & (valblock.FREQ >= 737))
PTPER = valblock.FREQ;
else PTPER = 7370;
PDC1 = valblock.PWM1;
PDC2 = PTPER>>5;
OC1R = valblock.SP1ON;
OC1RS = valblock.SP1OFF;
OC2R = valblock.SP2ON;
OC2RS = valblock.SP2OFF;
valblock.ADCscale = valblock.ADCscale & 0x000f;
valblock.SATscale = valblock.SATscale & 0x000f;
AUDIOrate = valblock.AUDIOrate;
}

void save_vars(void)
{
int i, sum;
int * source = (int *) &valblock;
int * dest = (int *) &eeblock;
sum = calc_cksum(sizeof(struct VALSTORE), source); //calc checksum
for (i=0; i < (sizeof(struct VALSTORE) - 1); i++)
WriteWord(dest++, *(source++));
WriteWord(dest, sum); // store the checksum
}

//================================================== ===========================
// Routine to calculate a checksum on a section of memory
// call with array size in 16 bit words and ptr to start.
//================================================== ===========================
int calc_cksum(int sizew, int *adr)
{
int i;
int cksum = 0;
for (i=0; i < (sizew - 1); i++) //-1 so dont include checksum itself
cksum += *adr++;
return cksum;
}

//================================================== ===========================
// Routine to calculate a checksum on a section of EE memory
// call with array size in 16 bit words and ptr to start.
//================================================== ===========================
int calc_EE_cksum(int sizew, int *adr)
{
int i;
int cksum = 0;
for (i=0; i < (sizew - 1); i++) //-1 so dont include checksum itself
cksum += ReadWord(adr++);
return cksum;
}
//================================================== ===========================
// Routine to calculate a checksum on a section of memory
// call with array size in 16 bit words and ptr to start.
// checksum is at end of block and test if OK ... return 1 for OK
//================================================== ===========================
int cksum_OK(int sizew, int *adr)
{
int i;
int cksum = 0;

for (i=0; i < (sizew - 1); i++) //-1 so dont include checksum itself
cksum += *adr++;
if (cksum == *adr)
return 1;
else
return 0;
}

//================================================== ===========================
// Routine to calculate a checksum on a section of EE memory
// call with array size in 16 bit words and ptr to start.
// checksum is at end of block and test if OK ... return 1 for OK
//================================================== ===========================
int cksum_EE_OK(int sizew, int *adr)
{
int i;
int cksum = 0;

for (i=0; i < (sizew - 1); i++) //-1 so dont include checksum itself
cksum += ReadWord(adr++);
if (cksum == ReadWord(adr))
return 1;
else
return 0;
}

**moodz** · 09-16-2011, 01:23 PM

system.h

/*
system.h - various things needed by all code blocks.
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>

#define VERSION "MooDz UNIPI v230"

#define FCY 29240000 // 29 MIPS ==> 7.3mhz rc osc * PLL16 /4

// define some i/o bits for the various modules
#define STATUS_LED _RB2

#define SELECTBUTT _RC13
#define ZEROBUTT _RC14
#define SATLOCKBUTT _RC15

#define AUDIO _RE8 //pin16

#define TRUE (1)
#define FALSE (0)

// for some reason these are not defined in the UART.h of the C30 compiler
// I am using, so I manually add them here if necessary
#ifndef UART_ALTRX_ALTTX
#define UART_ALTRX_ALTTX 0xFFE7 /*Communication through ALT pins*/
#endif
#ifndef UART_RX_TX
#define UART_RX_TX 0xFBE7 /*Communication through the normal pins*/
#endif

#define DEBOUNCE (5) /* button debounce */

//OptionState state values//
#define OptNORM 0
#define OptX1 1
#define OptX10 10
#define OptX100 100
#define OptSAVE 4
#define OptEXIT 5

//MenuState state values//
#define A 1
#define B 2
#define C 3
#define D 4
#define E 5
#define F 6
#define G 7
#define H 8
#define I 9
#define J 10
#define K 11
#define L 12
#define M 13
#define N 14
#define O 15
#define P 16
#define Q 17
#define R 18
#define S 19
#define T 20
#define U 21
#define V 22
#define W 23
#define X 24
#define Y 25
#define Z 26

//MenuItemState state values//
#define RUN 0
#define NORM 1
#define EDIT 2
#define SAVE 3
#define OPT 4

struct VALSTORE
{
double FCLOCK;
unsigned int FREQ;
unsigned int PWM1;
unsigned int PWM2;
unsigned int SP1ON;
unsigned int SP1OFF;
unsigned int SP2ON;
unsigned int SP2OFF;
unsigned int ADCscale;
unsigned int SATscale;
unsigned int AUDIOrate;
struct
{
unsigned unused : 16;
} bitfield16;
int CHECKSUM;
};

**moodz** · 09-16-2011, 01:28 PM

.... the complete MPLAB project files for v230 30F4012

Metal23.zip

moodz

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DSPIC30F4012 v230 Source Code

DSPIC30F4012 v230 Source Code

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