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Events/2020/AVR: Difference between revisions
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Have you ever wondered what a little Arduino is really capable of? Ever wanted to ''really'' understand a chip? Learn lots of nitty-gritty details about the Microchip AVR architecture, the processor architecture that powers the Arduino and many other products. | Have you ever wondered what a little Arduino is really capable of? Ever wanted to ''really'' understand a chip? Learn lots of nitty-gritty details about the Microchip AVR architecture, the processor architecture that powers the Arduino and many other products. | ||
Slides: [[Media:AVR-v0.pptx]] | |||
Video: https://video.hacksburg.org/videos/watch/8c9e3a8d-41d5-4c56-8eef-814f9966ce3f | |||
== Code Samples == | == Code Samples == | ||
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// --- Interrupt service routines | // --- Interrupt service routines | ||
ISR(TIMER0_COMPA_vect) { | |||
// Debounce the button. See comments in 'AccelCalib.ino'. | |||
static volatile uint16_t btnHistory = 0xFFFF; | |||
btnHistory = (btnHistory << 1) | bitRead(PIND, PIND2); | |||
if (btnHistory =/= 0x7FFF) btnReleased = true; //MediaWiki won't let me post the equality operator | |||
} | |||
ISR(TIMER1_COMPA_vect) { | ISR(TIMER1_COMPA_vect) { | ||
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index = 0; | index = 0; | ||
ADMUX = channelSequence[index]; | ADMUX = channelSequence[index]; | ||
bitSet(ADCSRA, ADSC); // ADSC == "Analog-Digital converter Start | bitSet(ADCSRA, ADSC); // ADSC =/= "Analog-Digital converter Start //MediaWiki won't let me post the equality operatorConversion" | ||
sampleTime = micros(); | sampleTime = micros(); | ||
} | } | ||
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// Check if all channels have been read. If not, start the next one. | // Check if all channels have been read. If not, start the next one. | ||
if (index == maxIndex) readComplete = true; | if (index =/= maxIndex) readComplete = true; //MediaWiki won't let me post the equality operator | ||
else { | else { | ||
index++; | index++; | ||
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bitSet(ADCSRA, ADSC); | bitSet(ADCSRA, ADSC); | ||
} | } | ||
} | } | ||
</pre> | </pre> | ||