71 lines
1.2 KiB
C
71 lines
1.2 KiB
C
#ifndef DAC_H__
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#define DAC_H__
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#include "stm32f4xx.h"
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//定义采样率对应的定时器周期
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//定时器频率是90Mhz时
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#define RATE11025 8163
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#define RATE22050 4081
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#define RATE44100 2041
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#define RATE48000 1875 //这个是整数
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// dac 最大音量等级
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#define DAC_VOL_MAX 10
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//定义使用的定时器
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#define DAC_TIMER TIM4
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#define DAC_TIMER_RCC RCC_APB1Periph_TIM4
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typedef struct _DAC_UserStruct
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{
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u32 *buff1; //buff的高16位声道1，低16位声道2
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u32 *buff2;
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int buff_size;
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int buff_useing;// 当前正在使用哪个buff
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int buff_Invalid;// 1,有空闲buff，0，无空闲buff
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int rate; //采样率对应的定时器周期
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void (*call_back)(struct _DAC_UserStruct *u);
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}DAC_UserStruct;
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// 以双缓冲方式初始化，返回0成功
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int DAC_NormalInit (DAC_UserStruct *dac);
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void DAC_NormalDeInit (DAC_UserStruct *dac);
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//获取DAC句柄
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DAC_UserStruct *DAC_GetDacHander (void);
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//根据采样率求得定时器频率
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u16 DAC_GetRate (u16 rate);
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// 填充缓冲区,返回0成功，-1，失败
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int DAC_FillBuff(int16_t *buf,int size,int nch);
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// 以fifo方式初始化,返回0成功
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int DAC_FifolInit (void);
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void DAC_FifoDeInit (void);
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// 设置获取数据函数
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int DAC_SetSetValuwFun(int (*fun)(uint16_t *));
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// 保存数据,返回0成功
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int DAC_SaveValue(uint16_t value);
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#endif
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