kopia lustrzana https://github.com/ArjanteMarvelde/uWFG-Pico
40 wiersze
1.0 KiB
C
40 wiersze
1.0 KiB
C
#ifndef __GEN_H__
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#define __GEN_H__
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/*
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* gen.h
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*
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* Created: Dec 2021
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* Author: Arjan te Marvelde
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*
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* See gen.c for more information
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*/
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#define OUTA 0 // Channel A indicator
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#define OUTB 1 // Channel B indicator
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#define GEN_MINBUFLEN 20 // Minimum nr of byte samples
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#define GEN_MAXBUFLEN 2000 // Maximum buffer size (byte samples)
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extern float _fsys;
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/*
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* The structure that defines the waveform input to wfg_play.
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* Note that the buffer needs to contain 4N bytes, i.e. needs to be 32bit aligned.
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* For high frequencies, the minimum buffer length is in the order of 32 bytes (buflen=8).
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*/
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typedef struct wfg
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{
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uint8_t *buf; // Points to waveform buffer
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uint32_t len; // Buffer length in byte samples
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float dur; // Duration of buffer, in seconds
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} wfg_t;
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/* Initialize both channels */
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void gen_init(void);
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/* Play a waveform on the channel indicated by output */
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void gen_play(int output, wfg_t *wave);
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#endif |