Hi I have been trying and reading to get interrupts working INT6, but i just cant get it to work. Eventually it will be used to wake it from sleep but at the moment i cant get it to do anything.
#include#include #define F_CPU 7372800 #include ISR(INT6_vect) //Input capture two { PORTD ^=_BV(PB7); _delay_ms(30); } int main(void) { DDRD |=_BV(7); PORTD|=_BV(7); PCICR |= (1 << PCIE0); PCMSK0 |= (1 << PCINT6); sei(); for(;;) { } }
INT6 (PD6) has NOTHING to do with PCINT6 (PB6). So which one are you trying to use?
I want to use INT6 so i can wake up the CPU after sleep. I thought PCINT6 was INT6? I made the above program to test it so & LED changes when the Input pin changes.
I just want one Pin only to wake up the CPU say PCINT6. Is this possible?
Read chapter 11 of the atmega32u4 datasheet carefully. There are two different classes of external interrupts on avrs.
Firstly, there's the "INT
Secondly, there's the "PCI
Table 7-2 tells you the conditions that the INT
- S
Ok now that's a trick i didn't realize there was a INT6 PIN (PE6). The below code has the update to make the ISR work properly. However im working on the sleep mode now. Is that all i have to do to get it into sleep mode? The current draw still seems to high. What current levels would you expect to see in sleep mode?
#include#include #define F_CPU 7372800 #include void Sleep_Init() { SMCR |=(1<<SM0)|(1<<SM1)|(1<<SM2); //Extended Standby SMCR |=(1<<SE); //Enable sleep mode } ISR(INT6_vect) { SMCR &=~(1<<SE); //Disable sleep mode PORTD ^=_BV(PB7); _delay_ms(30); SMCR |=(1<<SE); //Enable sleep mode } int main(void) { DDRD |=_BV(7); PORTD|=_BV(7); EICRB &=~ (1<<ISC60)|(1<<ISC61); //Active when low EIMSK|= (1<<INT6); //external pin interrupt enable. sei(); Sleep_Init(); for(;;) { } }
What current levels would you expect to see in sleep mode?
-- How are you measuring current draw?
-- Low-level interrupts keep triggering. Recent discussion: https://www.avrfreaks.net/index.p...
I'm measuring current draw with my fluke 189, it has a uA scale if i need it. It wasn't going that low only about 5mA.
Its true about the Low-level interrupts keep triggering if you hold it low but it seems there is no option to change it due to the mode im running. For my project its not ideal either, does anyone know a way around?
I have added this ASM code to it & it seems that SMCR |=(1<<SE); doesnt put it into sleep mode but this does. __asm__ __volatile__ ("sleep" "\n\t" :: );
#include#include #define F_CPU 7372800 #include void Sleep_Init() { SMCR |=(1<<SM0)|(1<<SM1)|(1<<SM2); //Extended Standby SMCR |=(1<<SE); //Enable sleep mode __asm__ __volatile__ ("sleep" "\n\t" :: ); } ISR(INT6_vect) { SMCR &=~(1<<SE); //Disable sleep mode PORTD ^=_BV(PB7); _delay_ms(30); } int main(void) { DDRD |=_BV(7); PORTD|=_BV(7); EICRB &=~ (1<<ISC60)|(1<<ISC61); //Active when low EIMSK|= (1<<INT6); //external pin interrupt enable. sei(); for(;;) { Sleep_Init(); } }
Enabling Sleep in SMCR is not the same as actually going to sleep.In .asm this is how it's done.
sleep_sequence: ldi temp,0x07 ;enable SLEEP in out smcr,temp ;POWER SAVE MODE sleep ;enter POWER SAVE MODE awakened: out smcr,zero ;disable POWER SAVE MODE
How C handles this I don't know.
sleep() ?
I'm measuring current draw with my fluke 189, it has a uA scale if i need it. It wasn't going that low only about 5mA.
The current draw still seems to high. What current levels would you expect to see in sleep mode?
What is connected to your AVR?
Its true about the Low-level interrupts keep triggering if you hold it low but it seems there is no option to change it due to the mode im running. For my project its not ideal either, does anyone know a way around?
Thanks for that Lennart im not sure how its done either its not sleep(); i tried it. I think the line i added tells the C compiler a certain part of it is asm & to use it.
Does anybody else know how if im doing it right/can answer the above question?
I mean: Are you measuring input power to the regulator, or to the AVR?
Damn i meant to say after the regulator. I know the test regulator i have draws 1mA. I might look into another.
Why don't you >>tell us<< what your readings are, and what you expect them to be?
What is connected to your AVR?
I did tell you what the current was 5mA but i thought that was too high. Using the latest code i have it down to 142.41uA. Good luck finding current levels for modes in the data sheet.
The IC is on a home made PCB with a regulator, crystal, 3 capacitors & two resistors. Nothing special.
Did you read the thread I linked to? Or not? Low-level interrupts are discussed and pin-change mentioned.
Yes i did. When i read the data sheet for the device it tells me i can only use INT6 low level but in other parts there is mention of a pin change etc so confusing. If so how would i code that to wake it up?
Ok here is the code to wake it from sleep using edge triggering. It seems you can use pin change interrupt to wake the device from sleep. That was vague for me in the data sheet & no one said the golden words "yes you can" haha. You can configure more than one port to do the edge triggering but i only needed one. Just bear in mind if use more than one pin they will jump to the same vector.
#include#include #define F_CPU 7372800 #include void Sleep_Init() { SMCR |=(1<<SM0)|(1<<SM1)|(1<<SM2); //Extended Standby SMCR |=(1<<SE); //Enable sleep mode __asm__ __volatile__ ("sleep" "\n\t" :: ); } ISR(PCINT0_vect) { SMCR &=~(1<<SE); //Disable sleep mode PORTD ^=_BV(PB7); //Toggle LED (for testing) } int main(void) { DDRD |=_BV(7); PORTD|=_BV(7); PCMSK0 |= (1<<PCINT6); //Use PCINT6 = PB6 pin 30. PCICR |= (1<<PCIE0); //Enable Pin change interrupt sei(); for(;;) { Sleep_Init(); } }
It seems you can use pin change interrupt to wake the device from sleep. That was vague for me in the data sheet & no one said the golden words "yes you can" haha.
Quote:Did you read the thread I linked to? Or not? Low-level interrupts are discussed and pin-change mentioned.
Yes i did.
You have to spell it out for the simple folk, i said it was confusing. I knew you would have some cheap comeback like that. Im glad someone understands the fine points of the datasheets but i wanted to talk to a person.
As for the other link i didn't see anything applicable to solve the problem that he had or mine. So to me it was worthless & even more confusing. Poor guy i hope he got it in the end.
A better response would have been "Yes you can" "Heres how you do it" with a basic code example. Now i don't think that's hard if you know what you are talking about.
At the end of the day its really hard to interpret someone elses problem because language has heaps of barriers.
Does anybody else know how if im doing it right/can answer the above question?
It seems you can use pin change interrupt to wake the device from sleep.That was vague for me in the data sheet & no one said the golden words "yes you can" haha.
You have to spell it out for the simple folk, i said it was confusing....A better response would have been "Yes you can" "Heres how you do it" with a basic code example. Now i don't think that's hard if you know what you are talking about.
When i read the data sheet for the device it tells me i can only use INT6 low level but in other parts there is mention of a pin change etc so confusing.
Good luck finding current levels for modes in the data sheet.
As for getting less current draw, read the REST of section 7, not just the sleep part . Your code shows that you didn't, as far as Imin_while_sleeping .
Offensive language removed. Further similar outburts will be reported which may result in a ban.
Thread locked - JS.
This is a very sad thread. Don't regulars here "get it"? This is a "happy place". Please try a bit harder. If you start to write an aggressive answer then maybe stop and think (a) will this help the OP and (b) why am I doing this - it's only a message board about programming micros after all.
