 |
 |
| View previous topic :: View next topic |
| Author |
Message |
Mike M
Guest
|
| RTTTL trouble |
 Posted: Sun Apr 17, 2005 11:55 am |
 |
|
Hi, I�m trying to use some of the code I�ve found in this forum to make a 16f877 play simple tones(like old cell phones) using PWM. I think the code was written by Mark.
| Code: | /*****************************************************************************/
/* */
/* RTTTL Ring Tone Player for Microchip Microcontrollers */
/* */
/* This program was designed to run on the PICDEM2 Plus demo board from */
/* Microchip. */
/* */
/* Usage: */
/* S3 - Selects Melody */
/* S2 - Starts/Stops Melody */
/* */
/* This code was designed for a clock speed of 20MHz */
/* The target device was a PIC18F452. */
/* You can use the PIC16F877 by changing the setup of CCP1 to */
/* CCP_COMPARE_INT. You will also need to toggle the output pin in the */
/* CCP1 interrupt routine. */
/* */
/* Many of the tunes were downloaded from "www.mrtones.com" */
/*****************************************************************************/
#case
#list
#include "16F877a.h"
#device *=16
#define CLOCKSPEED 20000000
#define CCP_COMPARE_TOGGLE_MATCH 2
#ORG 0x1E80,0x1FFF {} //for the 8k 16F876/7
#use delay(CLOCK=4000000)
#fuses HS, NOWDT, NOLVP, PUT
#define TMR1_PRESCALE 8
#define NOTE_C_SHARP (((CLOCKSPEED/4)/277.18)/TMR1_PRESCALE) // 277.18Hz
#define NOTE_D_SHARP (((CLOCKSPEED/4)/311.13)/TMR1_PRESCALE) // 311.13 Hz
#define NOTE_F_SHARP (((CLOCKSPEED/4)/369.99)/TMR1_PRESCALE) // 369.99 Hz
#define NOTE_G_SHARP (((CLOCKSPEED/4)/415.30)/TMR1_PRESCALE) // 415.30 Hz
#define NOTE_A_SHARP (((CLOCKSPEED/4)/466.16)/TMR1_PRESCALE) // 466.16 Hz
#define NOTE_C (((CLOCKSPEED/4)/261.63)/TMR1_PRESCALE) // 261.63 Hz
#define NOTE_D (((CLOCKSPEED/4)/293.66)/TMR1_PRESCALE) // 293.66 Hz
#define NOTE_E (((CLOCKSPEED/4)/329.63)/TMR1_PRESCALE) // 329.63 Hz
#define NOTE_F (((CLOCKSPEED/4)/349.23)/TMR1_PRESCALE) // 349.23 Hz
#define NOTE_G (((CLOCKSPEED/4)/392.00)/TMR1_PRESCALE) // 392.00 Hz
#define NOTE_A (((CLOCKSPEED/4)/440.00)/TMR1_PRESCALE) // 440.00 Hz
#define NOTE_B (((CLOCKSPEED/4)/493.88)/TMR1_PRESCALE) // 493.88 Hz
#define NOTE_SILENCE 0
#define DURATION_32 5 // Duration = 2^x
#define DURATION_16 4 // Duration = 2^x
#define DURATION_8 3 // Duration = 2^x
#define DURATION_4 2 // Duration = 2^x
#define DURATION_2 1 // Duration = 2^x
#define DURATION_1 0 // Duration = 2^x
typedef enum
{
SILENTNIGHT,
JINGLEBELLS,
LAST_MELODY
}MELODIES;
typedef struct
{
int Head;
int Tail;
int Count;
} NOTESTAT;
typedef struct
{
long note;
long duration;
}NOTE_DEF;
struct
{
int TRISC0:1;
int TRISC1:1;
int TRISC2:1;
int TRISC3:1;
int TRISC4:1;
int TRISC5:1;
int TRISC6:1;
int TRISC7:1;
}TRISCbits;
#if defined(__PCH__)
#locate TRISCbits = 0xF94
#else
#locate TRISCbits = 0x87
#endif
long TMR1;
#if defined(__PCH__)
#locate TMR1 = 0xFCE
#else
#locate TMR1 = 0x0E
#endif
int TMR1L;
#if defined(__PCH__)
#locate TMR1L = 0xFCE
#else
#locate TMR1L = 0x0E
#endif
int TMR1H;
#if defined(__PCH__)
#locate TMR1H = 0xFCF
#else
#locate TMR1H = 0x0F
#endif
int TMR0;
#if defined(__PCH__)
#locate TMR0 = 0xFD6
#else
#locate TMR0 = 0x01
#endif
#define MAX_NOTE_BUFFER_SIZE 4
#define NOTE_ROLLOVER_MASK 0b00000011
NOTE_DEF NoteBuffer[MAX_NOTE_BUFFER_SIZE];
NOTESTAT Notestat = {0,0,0};
long DurationCount=0;
int Tempo=0;
long Note_Ticks=0;
MELODIES Melody_Pointer;
long Note_Index = 0xFFFF;
BOOLEAN PlayMelodyFlag = TRUE;
const struct
{
char tune1[128];
char tune2[65];
int defaultoctave;
int defaultduration;
int tempo;
}SilentNight = {
{"f#.,8g#,f#,d#.,p.,f#.,8g#,f#,d#.,p.,2c#6,c#6,a#.,p.,2b,b,f#.,p.,2g#,g#,b.,8a#,g#,f#.,8g#,f#,d#.,p.,2g#,g#,b.,8a#,g#,f#.,8g#,f#,"},{"d#.,p.,2c#6,c#6,e.6,8c#6,a#,2b.,2d#6,p.,b,f#,d#,f#.,8e,c#,b.4,1p"},
5,
DURATION_4,
140
};
const struct
{
char tune1[128];
char tune2[75];
int defaultoctave;
int defaultduration;
int tempo;
}JingleBells = {
{"8e.,8e.,e.,8e.,8e.,e.,8e.,8g.,c,16d.,2e,p,8f.,8f.,f,16f.,8f.,8e.,8e.,16e.,16e.,8e.,8d.,8d.,8e.,d.,g.,8e.,8e.,e.,8e.,8e.,e.,8e.,"},{"8g.,c,16d.,2e,p,8f.,8f.,f,16f.,8f.,8e.,8e.,16e.,16e.,8g.,8g.,8f.,8d.,c.,1p"},
5,
DURATION_4,
180
};
/* Function Prototypes */
void InitTimer(void);
int PlayMelody();
void PlayNote(long note, int octave, int duration);
char get_char_from_tune(long index);
int get_tempo(void);
int get_defaultoctave(void);
int get_defaultduration(void);
void Melody_Task(void);
//-----------------------------------------------------------------------------
// Start of Code
//-----------------------------------------------------------------------------
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
void main(void)
{
TRISCbits.TRISC2 = 0;
InitTimer();
enable_interrupts(GLOBAL);
Melody_Pointer = JINGLEBELLS;
output_low(PIN_C5);
while(1)
{
Melody_Task();
}
}
/* *************************************************************************
DESCRIPTION: This function handles the playing of a melody
RETURN: True if the melody is still active or False if its complete
ALGORITHM: none
NOTES: none
*************************************************************************** */
int PlayMelody(void)
{
..and so on....
} |
I compile it and everithing goes right, but when I burn it into the chip and connect the speaker, nothing happens, no sound can be heard. I have played sound using the included tones.c with the compiler and everithing works fine.
I would appreciate any help that you can give me, thanks on advance |
|
 |
Mark
Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA
|
|
| Posted: Sun Apr 17, 2005 12:34 pm |
|
|
does your ccp int look like this:
| Code: | #int_ccp1
/* *************************************************************************
DESCRIPTION: This function controls the PWM of the piezo speaker
RETURN: none
ALGORITHM: none
NOTES: If you do not wish to use C2 as the output, then you will need
to toggle your output here. Make sure that you change the CCP
setup not to toggle the C2 output if this is the case
*************************************************************************** */
void ccp1_isr (void)
{
CCP_1 += Note_Ticks;
#if defined(__PCM__)
output_toggle(PIN_C2);
#endif
}
|
You might look at the lst file to make sure that output_toggle is actually in there and code is being generated. |
|
|
Mike M
Guest
|
|
| Posted: Sun Apr 17, 2005 12:43 pm |
|
|
Yes, the routine looks exactly like that. The pin C2 is the one supossed to generate the sound, isn�t it? If it�s like that something just does not work, and I don�t know what it can be. I�ve tried almost everything.
Thanks for answering me so fast. |
|
|
Mike M
Guest
|
|
| Posted: Sun Apr 17, 2005 2:29 pm |
|
|
OK, I see more or less which is the problem. If I change the pin (and only that) that toggles in the cpp1_isr routine (for example B0, which is another port that uses PWM for the 16f877a) and the code works perfectly. If that pin is C2, doesnt work. And what is strange is that pin works fine with other code, but not in every case (for some examples it does nothing).
I need to connect the speaker to that port, because(in my future application) port b will have a keypad
I don�t know why this happens, anyone has an idea?
Could it be that I need to change one of my variables?
I have recently changed to the version 3.20 of the compiler, can this be related to my problem?
Thank you |
|
|
Mike M
Guest
|
|
| Posted: Wed Apr 20, 2005 2:17 pm |
|
|
Still dont know why this happens.
My ports are all well configured, i ve checked the code many times, and still dont find a solution |
|
|
Mark
Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA
|
|
| Posted: Thu Apr 21, 2005 10:50 am |
|
|
I tried this code with a 16F876A and it works just fine:
| Code: |
/*****************************************************************************/
/* */
/* RTTTL Ring Tone Player for Microchip Microcontrollers */
/* */
/* This program was designed to run on the PICDEM2 Plus demo board from */
/* Microchip. */
/* */
/* Usage: */
/* S3 - Selects Melody */
/* S2 - Starts/Stops Melody */
/* */
/* This code was designed for a clock speed of 20MHz */
/* The target device was a PIC18F452. */
/* You can use the PIC16F877 by changing the setup of CCP1 to */
/* CCP_COMPARE_INT. You will also need to toggle the output pin in the */
/* CCP1 interrupt routine. */
/* */
/* Many of the tunes were downloaded from "www.mrtones.com" */
/*****************************************************************************/
#case
#list
#if defined(__PCH__)
#include "18F452.h"
#else
#include "16F876.h"
#endif
#device *=16
#define CLOCKSPEED 10000000
#define CCP_COMPARE_TOGGLE_MATCH 2
#use delay(CLOCK=CLOCKSPEED)
#fuses HS, NOWDT, NOLVP, PUT
#define TMR1_PRESCALE 8
#define NOTE_C_SHARP (((CLOCKSPEED/4)/277.18)/TMR1_PRESCALE) // 277.18Hz
#define NOTE_D_SHARP (((CLOCKSPEED/4)/311.13)/TMR1_PRESCALE) // 311.13 Hz
#define NOTE_F_SHARP (((CLOCKSPEED/4)/369.99)/TMR1_PRESCALE) // 369.99 Hz
#define NOTE_G_SHARP (((CLOCKSPEED/4)/415.30)/TMR1_PRESCALE) // 415.30 Hz
#define NOTE_A_SHARP (((CLOCKSPEED/4)/466.16)/TMR1_PRESCALE) // 466.16 Hz
#define NOTE_C (((CLOCKSPEED/4)/261.63)/TMR1_PRESCALE) // 261.63 Hz
#define NOTE_D (((CLOCKSPEED/4)/293.66)/TMR1_PRESCALE) // 293.66 Hz
#define NOTE_E (((CLOCKSPEED/4)/329.63)/TMR1_PRESCALE) // 329.63 Hz
#define NOTE_F (((CLOCKSPEED/4)/349.23)/TMR1_PRESCALE) // 349.23 Hz
#define NOTE_G (((CLOCKSPEED/4)/392.00)/TMR1_PRESCALE) // 392.00 Hz
#define NOTE_A (((CLOCKSPEED/4)/440.00)/TMR1_PRESCALE) // 440.00 Hz
#define NOTE_B (((CLOCKSPEED/4)/493.88)/TMR1_PRESCALE) // 493.88 Hz
#define NOTE_SILENCE 0
#define DURATION_32 5 // Duration = 2^x
#define DURATION_16 4 // Duration = 2^x
#define DURATION_8 3 // Duration = 2^x
#define DURATION_4 2 // Duration = 2^x
#define DURATION_2 1 // Duration = 2^x
#define DURATION_1 0 // Duration = 2^x
typedef enum
{
SILENTNIGHT,
JINGLEBELLS,
LAST_MELODY
}MELODIES;
typedef struct
{
int Head;
int Tail;
int Count;
} NOTESTAT;
typedef struct
{
long note;
long duration;
}NOTE_DEF;
struct
{
int TRISC0:1;
int TRISC1:1;
int TRISC2:1;
int TRISC3:1;
int TRISC4:1;
int TRISC5:1;
int TRISC6:1;
int TRISC7:1;
}TRISCbits;
#if defined(__PCH__)
#locate TRISCbits = 0xF94
#else
#locate TRISCbits = 0x87
#endif
long TMR1;
#if defined(__PCH__)
#locate TMR1 = 0xFCE
#else
#locate TMR1 = 0x0E
#endif
int TMR1L;
#if defined(__PCH__)
#locate TMR1L = 0xFCE
#else
#locate TMR1L = 0x0E
#endif
int TMR1H;
#if defined(__PCH__)
#locate TMR1H = 0xFCF
#else
#locate TMR1H = 0x0F
#endif
int TMR0;
#if defined(__PCH__)
#locate TMR0 = 0xFD6
#else
#locate TMR0 = 0x01
#endif
#define MAX_NOTE_BUFFER_SIZE 4
#define NOTE_ROLLOVER_MASK 0b00000011
NOTE_DEF NoteBuffer[MAX_NOTE_BUFFER_SIZE];
NOTESTAT Notestat = {0,0,0};
long DurationCount=0;
int Tempo=0;
long Note_Ticks=0;
MELODIES Melody_Pointer;
long Note_Index = 0xFFFF;
BOOLEAN PlayMelodyFlag = TRUE;
const struct
{
char tune1[128];
char tune2[65];
int defaultoctave;
int defaultduration;
int tempo;
}SilentNight = {
{"f#.,8g#,f#,d#.,p.,f#.,8g#,f#,d#.,p.,2c#6,c#6,a#.,p.,2b,b,f#.,p.,2g#,g#,b.,8a#,g#,f#.,8g#,f#,d#.,p.,2g#,g#,b.,8a#,g#,f#.,8g#,f#,"},{"d#.,p.,2c#6,c#6,e.6,8c#6,a#,2b.,2d#6,p.,b,f#,d#,f#.,8e,c#,b.4,1p"},
5,
DURATION_4,
140
};
const struct
{
char tune1[128];
char tune2[75];
int defaultoctave;
int defaultduration;
int tempo;
}JingleBells = {
{"8e.,8e.,e.,8e.,8e.,e.,8e.,8g.,c,16d.,2e,p,8f.,8f.,f,16f.,8f.,8e.,8e.,16e.,16e.,8e.,8d.,8d.,8e.,d.,g.,8e.,8e.,e.,8e.,8e.,e.,8e.,"},{"8g.,c,16d.,2e,p,8f.,8f.,f,16f.,8f.,8e.,8e.,16e.,16e.,8g.,8g.,8f.,8d.,c.,1p"},
5,
DURATION_4,
180
};
/* Function Prototypes */
void InitTimer(void);
int PlayMelody();
void PlayNote(long note, int octave, int duration);
char get_char_from_tune(long index);
int get_tempo(void);
int get_defaultoctave(void);
int get_defaultduration(void);
void Melody_Task(void);
//-----------------------------------------------------------------------------
// Start of Code
//-----------------------------------------------------------------------------
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
void main(void)
{
TRISCbits.TRISC2 = 0;
InitTimer();
enable_interrupts(GLOBAL);
Melody_Pointer = JINGLEBELLS;
while(1)
{
Melody_Task();
}
}
/* *************************************************************************
DESCRIPTION: This function handles the playing of a melody
RETURN: True if the melody is still active or False if its complete
ALGORITHM: none
NOTES: none
*************************************************************************** */
int PlayMelody(void)
{
int octave = 0;
int duration = 0;
long note = 0;
// Check for a valid Melody
if (Melody_Pointer >= LAST_MELODY)
{
// Reset the Melody to the start
Melody_Pointer = 0;
Note_Index = 0xFFFF;
}
// Load notes while we have enough room
while (Notestat.Count < MAX_NOTE_BUFFER_SIZE)
{
// Is this the first note?
if (Note_Index == 0xFFFF)
{
Tempo = get_tempo();
Note_Index = 0;
}
// Set Default duration
duration = get_defaultduration();
// Set Default Octave
octave = get_defaultoctave();
// Play a bit of slience between notes
if (get_char_from_tune(Note_Index) == ',')
{
PlayNote(0, 4, DURATION_32);
Note_Index++;
return(TRUE);
}
// We are checking the duration
else if ((get_char_from_tune(Note_Index) == '3') && (get_char_from_tune(Note_Index+1) == '2'))
{
duration = DURATION_32;
Note_Index += 2;
}
else if ((get_char_from_tune(Note_Index) == '1') && (get_char_from_tune(Note_Index+1) == '6'))
{
duration = DURATION_16;
Note_Index += 2;
}
else if (get_char_from_tune(Note_Index) == '8')
{
duration = DURATION_8;
Note_Index++;
}
else if (get_char_from_tune(Note_Index) == '4')
{
duration = DURATION_4;
Note_Index++;
}
else if (get_char_from_tune(Note_Index) == '2')
{
duration = DURATION_2;
Note_Index++;
}
else if (get_char_from_tune(Note_Index) == '1')
{
duration = DURATION_1;
Note_Index++;
}
// Now we get the note
switch (get_char_from_tune(Note_Index++))
{
case 'c':
if (get_char_from_tune(Note_Index) == '#')
{
note = NOTE_C_SHARP;
Note_Index++;
}
else
note = NOTE_C;
break;
case 'd':
if (get_char_from_tune(Note_Index) == '#')
{
note = NOTE_D_SHARP;
Note_Index++;
}
else
note = NOTE_D;
break;
case 'e':
note = NOTE_E;
break;
case 'f':
if (get_char_from_tune(Note_Index) == '#')
{
note = NOTE_F_SHARP;
Note_Index++;
}
else
note = NOTE_F;
break;
case 'g':
if (get_char_from_tune(Note_Index) == '#')
{
note = NOTE_G_SHARP;
Note_Index++;
}
else
note = NOTE_G;
break;
case 'a':
if (get_char_from_tune(Note_Index) == '#')
{
note = NOTE_A_SHARP;
Note_Index++;
}
else
note = NOTE_A;
break;
case 'b':
note = NOTE_B;
break;
case 'p': // slience
note = NOTE_SILENCE;
break;
}
// See if this note is 1.5x the duration
if (get_char_from_tune(Note_Index) == '.')
{
// Use the MSB to signify 1.5x
duration |= 0x80;
Note_Index++;
}
// Get the octave
switch (get_char_from_tune(Note_Index))
{
case '4':
octave = 4;
Note_Index++;
break;
case '5':
octave = 5;
Note_Index++;
break;
case '6':
octave = 6;
Note_Index++;
break;
case '7':
octave = 7;
Note_Index++;
break;
default:
break;
}
// Sometimes the duration multiplier comes after the octave
if (get_char_from_tune(Note_Index) == '.')
{
/* Duration 1.5x */
duration |= 0x80;
Note_Index++;
}
// Play the note (we actually just load it in a buffer
PlayNote(note, octave, duration);
// Is this the end?
if (get_char_from_tune(Note_Index) == 0)
{
Note_Index = 0xFFFF;
return(FALSE);
}
}
return(TRUE);
}
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
void PlayNote(long note, int octave, int duration)
{
long duration_count;
// Process octave
switch (octave)
{
case 4 :
break;
case 5 :
note = note >> 1;
break;
case 6 :
note = note >> 2;
break;
case 7 :
note = note >> 4;
break;
}
// Process Note Duration
duration_count = 256;
duration_count >>= (duration & 0x7F);
// If duration is 1.5x add .5 to duration
if (duration & 0x80)
duration_count += (duration_count >> 1);
// Add the note to our buffer
NoteBuffer[Notestat.Tail].note = note;
NoteBuffer[Notestat.Tail].duration = duration_count;
Notestat.Tail++;
Notestat.Tail &= NOTE_ROLLOVER_MASK;
Notestat.Count++;
}
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
void InitTimer(void)
{
setup_timer_0(RTCC_DIV_256 | RTCC_8_BIT);
setup_timer_1(T1_INTERNAL | T1_DIV_BY_8);
enable_interrupts(INT_CCP1);
enable_interrupts(INT_TIMER0);
enable_interrupts(INT_TIMER2);
}
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
char get_char_from_tune(long index)
{
switch (Melody_Pointer)
{
case SILENTNIGHT:
if (index<127)
return (SilentNight.tune1[index]);
else
return (SilentNight.tune2[index-127]);
break;
case JINGLEBELLS:
if (index<127)
return (JingleBells.tune1[index]);
else
return (JingleBells.tune2[index-127]);
break;
default:
break;
}
}
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
int get_tempo(void)
{
switch (Melody_Pointer)
{
case SILENTNIGHT:
return (SilentNight.tempo);
break;
case JINGLEBELLS:
return (JingleBells.tempo);
break;
default:
break;
}
}
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
int get_defaultoctave(void)
{
switch (Melody_Pointer)
{
case SILENTNIGHT:
return (SilentNight.defaultoctave);
break;
case JINGLEBELLS:
return (JingleBells.defaultoctave);
break;
default:
break;
}
}
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
int get_defaultduration(void)
{
switch (Melody_Pointer)
{
case SILENTNIGHT:
return (SilentNight.defaultduration);
break;
case JINGLEBELLS:
return (JingleBells.defaultduration);
break;
default:
break;
}
}
/* *************************************************************************
DESCRIPTION: This function handles checking for button presses
RETURN: none
ALGORITHM: none
NOTES: none
*************************************************************************** */
void Melody_Task(void)
{
if (PlayMelodyFlag)
{
if (PlayMelody()==0)
Melody_Pointer++;
}
}
//----------------------------------------------------------------------------
// ISR routines
//----------------------------------------------------------------------------
#int_ccp1
/* *************************************************************************
DESCRIPTION: This function controls the PWM of the piezo speaker
RETURN: none
ALGORITHM: none
NOTES: If you do not wish to use C2 as the output, then you will need
to toggle your output here. Make sure that you change the CCP
setup not to toggle the C2 output if this is the case
*************************************************************************** */
void ccp1_isr (void)
{
CCP_1 += Note_Ticks;
#if defined(__PCM__)
output_toggle(PIN_C2);
#endif
}
/* *************************************************************************
DESCRIPTION: This function is used to control the duration of the note
RETURN: none
ALGORITHM: none
NOTES: I store the notes in a buffer so that the main loop has other
time to do stuff with out have to sit at wait for a note to
complete.
*************************************************************************** */
#int_timer0
void timer0_isr (void)
{
// Preload a value for TMR0 so that we can control how long it takes to
// trigger an interrupt
TMR0 = Tempo;
// Is a note playing?
if (DurationCount)
{
DurationCount--;
if (!DurationCount)
setup_ccp1(CCP_OFF);
}
// Note is finished playing, do we have anymore in our buffer?
else if (Notestat.Count)
{
DurationCount = NoteBuffer[Notestat.Head].duration;
Note_Ticks = NoteBuffer[Notestat.Head].note;
Notestat.Count--;
Notestat.Head++;
Notestat.Head &= NOTE_ROLLOVER_MASK;
CCP_1 = TMR1 + Note_Ticks;
if (Note_Ticks)
{
/* Setup the CCP module to toggle the output pin c2 */
#if defined(__PCH__)
setup_ccp1(CCP_COMPARE_TOGGLE_MATCH);
#else
setup_ccp1(CCP_COMPARE_INT);
#endif
}
// Nope, we are all through so disable the PWM
else
{
setup_ccp1(CCP_OFF);
}
}
}
|
|
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
