sravan/Marlin-Firmware
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Allow increasing the software PWM frequency.

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This commit is contained in:
Erik van der Zalm
2013-06-09 12:52:49 +02:00
parent 8b0d82e9db
commit c8dcc7c208
4 changed files with 46 additions and 22 deletions
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17
Marlin/temperature.cpp
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@ -62,6 +62,9 @@ float current_temperature_bed = 0.0;
float bedKd=(DEFAULT_bedKd/PID_dT);
#endif //PIDTEMPBED
#ifdef FAN_SOFT_PWM
unsigned char fanSpeedSoftPwm;
#endif
//===========================================================================
//=============================private variables============================
@ -145,6 +148,10 @@ int watch_start_temp[EXTRUDERS] = ARRAY_BY_EXTRUDERS(0,0,0);
unsigned long watchmillis[EXTRUDERS] = ARRAY_BY_EXTRUDERS(0,0,0);
#endif //WATCH_TEMP_PERIOD
#ifndef SOFT_PWM_SCALE
#define SOFT_PWM_SCALE 0
#endif
//===========================================================================
//============================= functions ============================
//===========================================================================
@ -720,8 +727,8 @@ void tp_init()
setPwmFrequency(FAN_PIN, 1); // No prescaling. Pwm frequency = F_CPU/256/8
#endif
#ifdef FAN_SOFT_PWM
soft_pwm_fan=(unsigned char)fanSpeed;
#endif
soft_pwm_fan = fanSpeedSoftPwm / 2;
#endif
#endif
#ifdef HEATER_0_USES_MAX6675
@ -1028,7 +1035,7 @@ ISR(TIMER0_COMPB_vect)
static unsigned long raw_temp_2_value = 0;
static unsigned long raw_temp_bed_value = 0;
static unsigned char temp_state = 0;
static unsigned char pwm_count = 1;
static unsigned char pwm_count = (1 << SOFT_PWM_SCALE);
static unsigned char soft_pwm_0;
#if EXTRUDERS > 1
static unsigned char soft_pwm_1;
@ -1056,7 +1063,7 @@ ISR(TIMER0_COMPB_vect)
if(soft_pwm_b > 0) WRITE(HEATER_BED_PIN,1);
#endif
#ifdef FAN_SOFT_PWM
soft_pwm_fan =(unsigned char) fanSpeed;
soft_pwm_fan = fanSpeedSoftPwm / 2;
if(soft_pwm_fan > 0) WRITE(FAN_PIN,1);
#endif
}
@ -1074,7 +1081,7 @@ ISR(TIMER0_COMPB_vect)
if(soft_pwm_fan <= pwm_count) WRITE(FAN_PIN,0);
#endif
pwm_count++;
pwm_count += (1 << SOFT_PWM_SCALE);
pwm_count &= 0x7f;
switch(temp_state) {