67 lines
1.8 KiB
Python
67 lines
1.8 KiB
Python
#coding=utf-8
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import json
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# 常量定义
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MCU_CLK = 1000000 # 12MHz，内部时钟12分频
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MCU_T = 1000000/MCU_CLK # 单位时间为1us
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# 音符映射
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note_mapping = {
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1: 'C4', 2: 'D4', 3: 'E4', 4: 'F4', 5: 'G4', 6: 'A4', 7: 'B4'
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}
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# 根据频率计算计数器初值
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def freq_to_num(freq):
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T = 10**6/freq # 单位时间为1us
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time0 = int(2**16 - (T/2) / MCU_T)
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time0H = hex(time0>>8)
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time0L = hex(time0&0xff)
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print("freq = %0.2fHz, T = %dus, time0 = %d, time0H = %s, time0L = %s" % (freq, T, time0, time0H, time0L))
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return time0H, time0L
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# 根据音符名称获取频率
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def note_to_freq(note_name):
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try:
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# 读取 JSON 文件
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with open('note_data.json', 'r') as file:
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notes = json.load(file)
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# 获取特定音符的频率
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frequency = notes[note_name]['frequency']
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return frequency
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except KeyError:
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return None
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except Exception as e:
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print(f"An error occurred: {e}")
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return None
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# 根据音符名称获取计数器初值
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def note_to_num(note_name):
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frequency = note_to_freq(note_name.upper())
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if frequency is not None:
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print(f"{note_name}的频率为{frequency}Hz。")
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freq_to_num(frequency)
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else:
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print(f"{note_name} 不是有效的音符。")
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# 转换函数
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def map_tones_to_notes(tone_array):
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notes = []
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for tone in tone_array:
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# 将音调映射到相应的音符
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note = note_mapping.get((tone - 1) % 7 + 1 if tone <= 7 else (tone - 1) % 7 + 8)
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notes.append(note)
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return notes
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# 原始数据：小星星歌曲
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soundtones = [
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1,1,5,5,6,6,5,4,4,3,3,2,2,1,
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5,5,4,4,3,3,2,5,5,4,4,3,3,2,
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1,1,5,5,6,6,5,4,4,3,3,2,2,1
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]
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if __name__ == '__main__':
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mapped_notes = map_tones_to_notes(soundtones)
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for note in mapped_notes:
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note_to_num(note)
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