STM32+咪头+OLED12864音乐LED频谱制作附程序

ID:575440 · 发表于 2019-7-1 10:29

制作过程：
1.准备材料：
stm32f103核心板 1块
OLED12864显示屏 1块（SPI接口）
声音检测传感器 1块（咪头+放大电路可以网上买现成的模块，也可根据后文提供的原理图自己做）
2.硬件连接：
(1)OLED连接：
OLED_SCLK ————  PB7
OLED_SDIN ————  PB6
OLED_RST    ————  PB5
OLED_RS    ————  PB4
(2)声音检测传感器连接:
直接将模块的输出接到单片机的PA0即可。
OK硬件连接完成！就这么简单！
3.程序下载
接下来将程序下载到单片机即可，音乐频谱就完成了！（别告诉我你连下载程序都不会滑稽）
程序烧录文件链接：https://pan.baidu.com/s/1EjKPvBFbTmYzzh6fSn0U5A 密码：o6uu
程序源码：https://download.csdn.net/download/mc_li/10601743
ps:以上就是简单的音乐频谱制作过程，下面是较为详细的制作过程，提供源码和原理图，有兴趣的同志们可以看看。

单片机源程序如下:

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f1xx_hal.h"
#include "adc.h"
#include "dma.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"
/* USER CODE BEGIN Includes */
#include "stm32_dsp.h"
#include "table_fft.h"
#include "math.h"
#include "oled.h"
#include "config.h"
#include "bg.h"
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
#define NPT 256
#define PI2 6.28318530717959
//采样率计算
//分辨率：Fs/NPT
//#define Fs 10000
#define Fs 9984
//取9984能出来整数的分辨率 9984/256 = 39Hz
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
void Creat_Single(void);
void GetPowerMag(void);
void Single_Get(void);
void display1(void);
void display2(void);
void Key_Scan(void);
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
uint32_t adc_buf[NPT]={0};
long lBufInArray[NPT];
long lBufOutArray[NPT/2];
long lBufMagArray[NPT/2];
uint8_t prt = 10; //量化显示的比例
#define SHOW_NUM 4 //显示函数的个数
uint8_t display_num = 1; //控制显示方式的
uint8_t auto_display_flag = 0; //自动切换显示标志 1：自动切换 0:手动
uint8_t fall_pot[128]; //记录下落点的坐标
/* USER CODE END 0 */
int main(void)
{
/* USER CODE BEGIN 1 */
uint16_t i = 0;
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_USART1_UART_Init();
MX_ADC1_Init();
MX_TIM3_Init();
/* USER CODE BEGIN 2 */
printf("uart test! \r\n");
/*初始化显示*/
GUI_Initialize();
/*设置前景色和背景色这里用1和0代替*/
GUI_SetColor(1,0);
GUI_LoadPic(0,0,(uint8_t *)&gImage_bg,128,64);
GUI_Exec();
HAL_Delay(3000);
//初始化下落点把下落的点初始化为最底部显示
for(i=0;i<128;i++)
fall_pot[i] = 63;
/*启动ADC的DMA传输配合下面定时器来触发ADC转换*/
HAL_ADC_Start_DMA(&hadc1, adc_buf, NPT);
/*开启定时器用溢出事件来触发ADC转换*/
HAL_TIM_Base_Start(&htim3);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
Key_Scan();
}
/* USER CODE END 3 */
}
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_PeriphCLKInitTypeDef PeriphClkInit;
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
/**Configure the Systick interrupt time
*/
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
/**Configure the Systick
*/
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/* USER CODE BEGIN 4 */
/************FFT相关*****************/
//测试用生成一个信号
void Creat_Single(void)
{
u16 i = 0;
float fx=0.0;
for(i=0; i<NPT; i++)
{
fx = 2048+2048*sin(PI2 * i * 200.0 / Fs)+
3100*sin(PI2 * i * 502.0 / Fs)+
1300*sin(PI2 * i * 990.0 / Fs);
lBufInArray[i] = ((signed short)fx) << 16;
}
}
//获取FFT后的直流分量
void GetPowerMag(void)
{
signed short lX,lY;
float X,Y,Mag;
unsigned short i;
for(i=0; i<NPT/2; i++)
{
lX = (lBufOutArray[i] << 16) >> 16;
lY = (lBufOutArray[i] >> 16);
//除以32768再乘65536是为了符合浮点数计算规律
X = NPT * ((float)lX) / 32768;
Y = NPT * ((float)lY) / 32768;
Mag = sqrt(X * X + Y * Y)*1.0/ NPT;
if(i == 0)
lBufMagArray[i] = (unsigned long)(Mag * 32768);
else
lBufMagArray[i] = (unsigned long)(Mag * 65536);
}
}
/*柱状显示*/
void display1(void)
{
uint16_t i = 0;
uint8_t x = 0;
uint8_t y = 0;
/*******************显示*******************/
GUI_ClearSCR();
for(i = 0; i < 32; i++) //间隔的取32个频率出来显示
{
x = (i<<2); //i*4
y = 63-(lBufMagArray[x+1]/prt)-2; //加1是为了丢掉第一个直流分量
if(y>63) y = 63;
GUI_LineWith(x,y,x,63,3,1);
//画下落的点
if(fall_pot[i]>y) fall_pot[i] = y;
else
{
if(fall_pot[i]>63) fall_pot[i]=63;
GUI_LineWith(x,fall_pot[i],x,fall_pot[i]+3,3,1);
fall_pot[i] += 2 ;
}
}
GUI_Exec();
}
/*单柱状显示*/
void display2(void)
{
uint16_t i = 0;
uint8_t y = 0;
/*******************显示*******************/
GUI_ClearSCR();
for(i = 1; i < 128; i++)
{
y = 63-(lBufMagArray[i]/prt)-2;
if(y>63) y = 63;
GUI_RLine(i,y,63,1);
//画下落的点
if(fall_pot[i]>y) fall_pot[i] = y;
else
{
if(fall_pot[i]>63) fall_pot[i]=63;
GUI_RLine(i,fall_pot[i],fall_pot[i]+1,1);
fall_pot[i] += 2 ;
}
}
GUI_Exec();
}
/*柱状显示中间对称*/
void display3(void)
{
uint16_t i = 0;
uint8_t y = 0;
/*******************显示*******************/
GUI_ClearSCR();
for(i = 0; i < 127; i++)
{
y = 31-(lBufMagArray[i+1]/prt)-2; //加1是为了丢掉第一个直流分量
if(y>31) y = 31;
GUI_RLine(i,32,y,1);
GUI_RLine(i,32,63-y,1);
//画下落的点
if(fall_pot[i]>y) fall_pot[i] = y;
else
{
if(fall_pot[i]>30) fall_pot[i]=30;
GUI_RLine(i,fall_pot[i],fall_pot[i]+1,1);
GUI_RLine(i,63-fall_pot[i],63-(fall_pot[i]+1),1);
fall_pot[i] += 2 ;
}
}
GUI_Exec();
}
/*单柱状显示中间对称*/
void display4(void)
{
uint16_t i = 0;
uint8_t x = 0;
uint8_t y = 0;
/*******************显示*******************/
GUI_ClearSCR();
for(i = 0; i < 32; i++) //间隔的取32个频率出来显示
{
x = (i<<2); //i*4
y = 31-(lBufMagArray[x+1]/prt)-2; //加1是为了丢掉第一个直流分量
if(y>31) y = 31;
GUI_LineWith(x,y,x,32,3,1);
GUI_LineWith(x,63-y,x,32,3,1);
//画下落的点
if(fall_pot[i]>y) fall_pot[i] = y;
else
{
if(fall_pot[i]>31) fall_pot[i]=31;
GUI_LineWith(x,fall_pot[i],x,fall_pot[i]+3,3,1);
GUI_LineWith(x,63 - fall_pot[i],x,63 - fall_pot[i]-3,3,1);
fall_pot[i] += 2 ;
}
}
GUI_Exec();
}
//ADC DMA传输中断
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
uint16_t i = 0;
static uint16_t num = 0;
// printf("adc dma interrupt \r\n");
HAL_ADC_Stop_DMA(&hadc1); //完成一次测量关闭DMA传输
//填充数组
for(i=0;i<NPT;i++)
lBufInArray[i] = ((signed short)(adc_buf[i]-2048)) << 16; //这里因为单片机的ADC只能测正的电压所以需要前级加直流偏执
//加入直流偏执后软件上减去2048即一半达到负半周期测量的目的
//cr4_fft_1024_stm32(lBufOutArray, lBufInArray, NPT); //FFT变换
cr4_fft_256_stm32(lBufOutArray, lBufInArray, NPT);
GetPowerMag(); //取直流分量对应的AD值
// //打印出来测试
// for(i=0;i<NPT/2;i++)
// printf("i:%3d, f:%.2f, Power:%10d\r\n", i, (float)i*Fs/NPT, lBufMagArray[i]);
//自动显示
if(auto_display_flag == 1)
{
if(num>300)
{
num = 0;
display_num ++;
if(display_num>SHOW_NUM) display_num = 1;
}
}
num++;
//显示
switch(display_num)
{
case 1:
display1();
break;
case 2:
display2();
break;
case 3:
display3();
break;
case 4:
display4();
break;
default:
display3();
break;
}
HAL_ADC_Start_DMA(&hadc1, adc_buf, NPT);
}
#define K1 HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_3)
#define K2 HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_4)
#define K3 HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_5)
void Key_Scan(void)
{
static uint8_t mode_num = 0;
if(K1 == RESET)
{
HAL_Delay(10);
if(K1 == RESET)
{
while(!K1);
mode_num=!mode_num;
if(mode_num == 1) //自动显示模式
{
auto_display_flag = 1;
GUI_PutString(0,0,"Auto");
GUI_Exec();
}
else //正常显示模式手动切换效果
{
auto_display_flag = 0;
GUI_PutString(0,0,"Manual");
GUI_Exec();
}
}
}
if(K2 == RESET)
{
HAL_Delay(10);
if(K2 == RESET)
{
while(!K2);
if(mode_num == 0) //手动模式
{
display_num ++;
if(display_num > SHOW_NUM) display_num = 1;
}
}
}
if(K3 == RESET)
{
HAL_Delay(10);
if(K3 == RESET)
{
while(!K3);
if(mode_num == 0) //手动模式
{
if(display_num == 1) display_num = SHOW_NUM+1;
……………………
…………限于本文篇幅余下代码请从51黑下载附件…………