Why is no PWM signal generated using Timer 2?
I managed to work with timer 0 and 1 but am unable to generate a PWM with timer 2 in my atmega328p.
This is the code:
#include <avr/io.h>
int main(void)
{
/* PD6 output */
DDRD |= (1 << DDD6);
/* 50% duty cycle */
OCR2A = 128;
/* fast PWM */
TCCR2A |= (1 << WGM21) | (1 << WGM20);
/* prescaler = 8 */
TCCR2B |= (1 << CS21);
while (1);
}
Could someone explain what the issue is and why I am not seeing a pwm signal on pin 6 of my arduino uno board?
Thanks
timers
edited 12 hours ago
Duncan C
1,9801618
asked 13 hours ago
traduceradtraducerad
1062
New contributor
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I managed to work with timer 0 and 1 but am unable to generate a PWM with timer 2 in my atmega328p.
This is the code:
#include <avr/io.h>
int main(void)
{
/* PD6 output */
DDRD |= (1 << DDD6);
/* 50% duty cycle */
OCR2A = 128;
/* fast PWM */
TCCR2A |= (1 << WGM21) | (1 << WGM20);
/* prescaler = 8 */
TCCR2B |= (1 << CS21);
while (1);
}
Could someone explain what the issue is and why I am not seeing a pwm signal on pin 6 of my arduino uno board?
Thanks
timers
edited 12 hours ago
Duncan C
1,9801618
asked 13 hours ago
traduceradtraducerad
1062
New contributor
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
1
The post is definitely on topic. I don't understand why it has attracted a vote to be closed.
– MichaelT
2 hours ago
I am the one who up-voted the question, one of the three up-votes for the answer, and just up-voted your comment :)
– VE7JRO
2 hours ago
add a comment |
I managed to work with timer 0 and 1 but am unable to generate a PWM with timer 2 in my atmega328p.
This is the code:
#include <avr/io.h>
int main(void)
{
/* PD6 output */
DDRD |= (1 << DDD6);
/* 50% duty cycle */
OCR2A = 128;
/* fast PWM */
TCCR2A |= (1 << WGM21) | (1 << WGM20);
/* prescaler = 8 */
TCCR2B |= (1 << CS21);
while (1);
}
Could someone explain what the issue is and why I am not seeing a pwm signal on pin 6 of my arduino uno board?
Thanks
timers
edited 12 hours ago
Duncan C
1,9801618
asked 13 hours ago
traduceradtraducerad
1062
New contributor
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I managed to work with timer 0 and 1 but am unable to generate a PWM with timer 2 in my atmega328p.
This is the code:
#include <avr/io.h>
int main(void)
{
/* PD6 output */
DDRD |= (1 << DDD6);
/* 50% duty cycle */
OCR2A = 128;
/* fast PWM */
TCCR2A |= (1 << WGM21) | (1 << WGM20);
/* prescaler = 8 */
TCCR2B |= (1 << CS21);
while (1);
}
Could someone explain what the issue is and why I am not seeing a pwm signal on pin 6 of my arduino uno board?
Thanks
timers
timers
edited 12 hours ago
Duncan C
1,9801618
asked 13 hours ago
traduceradtraducerad
1062
New contributor
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 12 hours ago
Duncan C
1,9801618
asked 13 hours ago
traduceradtraducerad
1062
New contributor
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 12 hours ago
Duncan C
1,9801618
edited 12 hours ago
Duncan C
1,9801618
edited 12 hours ago
Duncan C
1,9801618
1,9801618
asked 13 hours ago
traduceradtraducerad
1062
New contributor
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 13 hours ago
traduceradtraducerad
1062
asked 13 hours ago
traduceradtraducerad
1062
1062
New contributor
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
traducerad is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
1
The post is definitely on topic. I don't understand why it has attracted a vote to be closed.
– MichaelT
2 hours ago
I am the one who up-voted the question, one of the three up-votes for the answer, and just up-voted your comment :)
– VE7JRO
2 hours ago
add a comment |
1
The post is definitely on topic. I don't understand why it has attracted a vote to be closed.
– MichaelT
2 hours ago
I am the one who up-voted the question, one of the three up-votes for the answer, and just up-voted your comment :)
– VE7JRO
2 hours ago
1
1
The post is definitely on topic. I don't understand why it has attracted a vote to be closed.
– MichaelT
2 hours ago
The post is definitely on topic. I don't understand why it has attracted a vote to be closed.
– MichaelT
2 hours ago
I am the one who up-voted the question, one of the three up-votes for the answer, and just up-voted your comment :)
– VE7JRO
2 hours ago
I am the one who up-voted the question, one of the three up-votes for the answer, and just up-voted your comment :)
– VE7JRO
2 hours ago
add a comment |
1 Answer
1
active
oldest
votes
The output compare unit of timer 2 is connected to pins PB3 (OC2A) and PD3 (OC2B). So you have to configure those as outputs.
Keep in mind that you can't choose any pin when using hardware pwm, this hardware feature is linked to specific pins.
You also have to set COM2A1 in TCCR2A. Otherwise OC2A is disconnected from the output compare unit (ref: Table 17-3 in datasheet).
The effect of COM2A0/1 depends on the configuration in WGM20-WGM22.
The same applies to OC2B respectively.
answered 13 hours ago
Sim SonSim Son
966
I tried what you suggested, but that doesn't seem to work: paste.ubuntu.com/p/K8KmKnqyvV Any suggestions?
– traducerad
7 hours ago
I compiled/flashed your code and I found that inTCCR2Ayou have to setCOM2A1(see my edit).
– Sim Son
6 hours ago
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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votes
The output compare unit of timer 2 is connected to pins PB3 (OC2A) and PD3 (OC2B). So you have to configure those as outputs.
Keep in mind that you can't choose any pin when using hardware pwm, this hardware feature is linked to specific pins.
You also have to set COM2A1 in TCCR2A. Otherwise OC2A is disconnected from the output compare unit (ref: Table 17-3 in datasheet).
The effect of COM2A0/1 depends on the configuration in WGM20-WGM22.
The same applies to OC2B respectively.
answered 13 hours ago
Sim SonSim Son
966
I tried what you suggested, but that doesn't seem to work: paste.ubuntu.com/p/K8KmKnqyvV Any suggestions?
– traducerad
7 hours ago
I compiled/flashed your code and I found that inTCCR2Ayou have to setCOM2A1(see my edit).
– Sim Son
6 hours ago
add a comment |
The output compare unit of timer 2 is connected to pins PB3 (OC2A) and PD3 (OC2B). So you have to configure those as outputs.
Keep in mind that you can't choose any pin when using hardware pwm, this hardware feature is linked to specific pins.
You also have to set COM2A1 in TCCR2A. Otherwise OC2A is disconnected from the output compare unit (ref: Table 17-3 in datasheet).
The effect of COM2A0/1 depends on the configuration in WGM20-WGM22.
The same applies to OC2B respectively.
answered 13 hours ago
Sim SonSim Son
966
I tried what you suggested, but that doesn't seem to work: paste.ubuntu.com/p/K8KmKnqyvV Any suggestions?
– traducerad
7 hours ago
I compiled/flashed your code and I found that inTCCR2Ayou have to setCOM2A1(see my edit).
– Sim Son
6 hours ago
add a comment |
The output compare unit of timer 2 is connected to pins PB3 (OC2A) and PD3 (OC2B). So you have to configure those as outputs.
Keep in mind that you can't choose any pin when using hardware pwm, this hardware feature is linked to specific pins.
You also have to set COM2A1 in TCCR2A. Otherwise OC2A is disconnected from the output compare unit (ref: Table 17-3 in datasheet).
The effect of COM2A0/1 depends on the configuration in WGM20-WGM22.
The same applies to OC2B respectively.
answered 13 hours ago
Sim SonSim Son
966
The output compare unit of timer 2 is connected to pins PB3 (OC2A) and PD3 (OC2B). So you have to configure those as outputs.
Keep in mind that you can't choose any pin when using hardware pwm, this hardware feature is linked to specific pins.
You also have to set COM2A1 in TCCR2A. Otherwise OC2A is disconnected from the output compare unit (ref: Table 17-3 in datasheet).
The effect of COM2A0/1 depends on the configuration in WGM20-WGM22.
The same applies to OC2B respectively.
answered 13 hours ago
Sim SonSim Son
966
edited 2 hours ago
answered 13 hours ago
Sim SonSim Son
966
answered 13 hours ago
Sim SonSim Son
966
answered 13 hours ago
Sim SonSim Son
966
966
I tried what you suggested, but that doesn't seem to work: paste.ubuntu.com/p/K8KmKnqyvV Any suggestions?
– traducerad
7 hours ago
I compiled/flashed your code and I found that inTCCR2Ayou have to setCOM2A1(see my edit).
– Sim Son
6 hours ago
add a comment |
I tried what you suggested, but that doesn't seem to work: paste.ubuntu.com/p/K8KmKnqyvV Any suggestions?
– traducerad
7 hours ago
I compiled/flashed your code and I found that inTCCR2Ayou have to setCOM2A1(see my edit).
– Sim Son
6 hours ago
I tried what you suggested, but that doesn't seem to work: paste.ubuntu.com/p/K8KmKnqyvV Any suggestions?
– traducerad
7 hours ago
I tried what you suggested, but that doesn't seem to work: paste.ubuntu.com/p/K8KmKnqyvV Any suggestions?
– traducerad
7 hours ago
I compiled/flashed your code and I found that in
TCCR2A you have to set COM2A1 (see my edit).– Sim Son
6 hours ago
I compiled/flashed your code and I found that in
TCCR2A you have to set COM2A1 (see my edit).– Sim Son
6 hours ago
add a comment |
traducerad is a new contributor. Be nice, and check out our Code of Conduct.
traducerad is a new contributor. Be nice, and check out our Code of Conduct.
traducerad is a new contributor. Be nice, and check out our Code of Conduct.
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1
The post is definitely on topic. I don't understand why it has attracted a vote to be closed.
– MichaelT
2 hours ago
I am the one who up-voted the question, one of the three up-votes for the answer, and just up-voted your comment :)
– VE7JRO
2 hours ago