a4305284d0
- Add double precision to LEDC frequency - Add method for writing frequencies (Tones) - Add method for writing notes (8 channels polyphony anyone?)
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _ESP32_HAL_LEDC_H_
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#define _ESP32_HAL_LEDC_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <stdbool.h>
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typedef enum {
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NOTE_C, NOTE_Cs, NOTE_D, NOTE_Eb, NOTE_E, NOTE_F, NOTE_Fs, NOTE_G, NOTE_Gs, NOTE_A, NOTE_Bb, NOTE_B, NOTE_MAX
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} note_t;
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//channel 0-15 resolution 1-16bits freq limits depend on resolution
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double ledcSetup(uint8_t channel, double freq, uint8_t resolution_bits);
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void ledcWrite(uint8_t channel, uint32_t duty);
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double ledcWriteTone(uint8_t channel, double freq);
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double ledcWriteNote(uint8_t channel, note_t note, uint8_t octave);
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uint32_t ledcRead(uint8_t channel);
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double ledcReadFreq(uint8_t channel);
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void ledcAttachPin(uint8_t pin, uint8_t channel);
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void ledcDetachPin(uint8_t pin);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ESP32_HAL_LEDC_H_ */
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