# sin_wave_gen

**Repository Path**: yocop/sin_wave_gen

## Basic Information

- **Project Name**: sin_wave_gen
- **Description**: 可生成不同频率的正弦波及扫频波
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-06-23
- **Last Updated**: 2024-07-10

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 概述

用于动态生成不同频率的

示例代码：
```
#include <sin_wave_gen.h>
#define RATE     48000
#define RATE_DIV 100
    int16_t *buffer = malloc(RATE / RATE_DIV * 2);

    if(buffer == NULL) {
        return;
    }

    sin_wave_handle_t handle       = sin_wave_new(start_freq, end_freq, RATE, time, db);
    ao_conf_t ao_cnf;		
    sf_t sf       = sf_make_channel(1) |
                    sf_make_rate(RATE) |
                    sf_make_bit(16) |
                    sf_make_signed(1);
    unsigned char *eqcfg = NULL;
    unsigned int eqcfg_size = 0;

    // board_audio_get_eqconfig(&eqcfg, &eqcfg_size, -1);
    ao_conf_init(&ao_cnf);
    ao_cnf.name          = "alsa";
    ao_cnf.period_ms = 15;
    ao_cnf.aef_conf = eqcfg;
    ao_cnf.aef_conf_size = eqcfg_size;

    ao_cls_t *dev_handle = ao_open(sf, &ao_cnf);

    if (dev_handle == NULL) {

        return ;
    }
    ao_start(dev_handle);

    for (int i = 0; i < time * RATE_DIV; i ++) {
        sin_wave_gen(handle,     buffer, RATE / RATE_DIV);

        ao_write(dev_handle, (uint8_t*)buffer, RATE / RATE_DIV * 2);
    }

    sin_wave_destory(handle);
    ao_stop(dev_handle);
    ao_close(dev_handle);
```