20 lines
490 B
C
20 lines
490 B
C
#ifndef SAMPLING_H_
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#define SAMPLING_H_
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#include <stdint.h>
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#define ADC_BUFFER_SIZE 2048 // size must be a power of 2
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// index wrapping macro
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#define ADC_BUFFER_WRAP(i) ((i) & (ADC_BUFFER_SIZE - 1))
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volatile int32_t gADCBufferIndex;
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volatile uint16_t gADCBuffer[ADC_BUFFER_SIZE]; // circular buffer
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volatile uint32_t gADCErrors; // number of missed ADC deadlines
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// initialize ADC and ISR
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void start_sampler(void);
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void set_frequency(uint64_t microseconds);
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#endif /* SAMPLING_H_ */
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