我把程序 贴上了 各位大神帮我看看怎么回事 现在的问题是 dma无法正常发送，我没调用send函数时，led能正常显示 一旦调用了led都无法正确显示
#include "misc.h"
#include "stdio.h"
#include "math.h"
#include "STM32l1xx_adc.h"
#include "stm32l1xx_lcd.h"
#include "stm32l1xx_rcc.h"
#include "stm32l1xx_rtc.h"
#include "stm32l1xx_exti.h"
#include "stm32l1xx_pwr.h"
#include "stm32l1xx_syscfg.h"
#include "stm32l1xx_dbgmcu.h"
#include "stm32_tsl_api.h"
#include "stm32l15x_tsl_ct_acquisition.h"
#include "led.h"
#include "ClockConfig.h"
#include "IIC_Communication.h"
#include "afe4400.h"
#include "coef_filter.h"
#include "Usart.h"
#define N 50
#define sample_rate 250
#define Divided_Fre 2
#define High_pass_Orders 667
#define Low_pass_Orders 128
unsigned char Disp_Flag,readDataFlag;
int send(void);
long AFE44xx_SPO2_Data_buf[6],test,coef_IR[High_pass_Orders],coef_Red[High_pass_Orders],coef_low_IR[Low_pass_Orders],coef_low_Red[Low_pass_Orders];
float XRed[sample_rate],YIRed[sample_rate];
//uint32_t ;
//void delay_ms(uint32_t ms);
//******main*******//
int main(void)
{
unsigned char i,k,Tmax,x,z,Win_Num,Str_Voltage[9]={0},spo2_value[9]={0};
//unsigned int Fs;
unsigned int Freq_Dvider4;
int T_data;
float Ynt=0.0,Ynt_Red,Fs,Lmax,Lmax_pre,Lmax_bac,Ynt_Disp,XRed_Sum,YIRed_Sum,XRed_Avg,YRed_Avg,R;//XRed[sample_rate],YIRed[sample_rate];
double Lxy,Lxx,Lyy;
uint32_t j,T_pre,T_bac=1;
uint16_t n;
n=0;readDataFlag=0;
Freq_Dvider4=1;
x=0;k=0;z=0;
ClockConfig();
Led_Init(); //³õʼ»¯ÓëLEDÁ¬½ÓµÄÓ²¼þ½Ó¿Ú
I2C_Configuration();
OLED_Init();
OLED_CLS();//ÇåÆÁ
AFE44xx_PowerOn_Init();
for(i=0;i<5;i++)
{
OLED_ShowCN_12x12(2+i*12,0,i);//??????
}
for(i=5;i<10;i++)
{
OLED_ShowCN_12x12(2+(i-5)*12,2,i);//??????
}
while(1)
{
if(readDataFlag)
{
readDataFlag = 0;
AFE44xx_SPO2_Data_buf[0] = AFE44xx_Reg_Read(0x2A); //read RED data
AFE44xx_SPO2_Data_buf[1] = AFE44xx_Reg_Read(43); //read Ambient data
AFE44xx_SPO2_Data_buf[2] = AFE44xx_Reg_Read(44); //read IR Data
AFE44xx_SPO2_Data_buf[3] = AFE44xx_Reg_Read(45); //read Ambient Data
AFE44xx_SPO2_Data_buf[4] = AFE44xx_Reg_Read(0x2E); //read RED - Ambient Data
AFE44xx_SPO2_Data_buf[5] = AFE44xx_Reg_Read(47); //read IR - Ambient Data3
/**************************************high pass filter*****************************************/
coef_IR[0]=AFE44xx_SPO2_Data_buf[5];
coef_Red[0]=AFE44xx_SPO2_Data_buf[4];
for(j=0;j<High_pass_Orders;j++)
{
Ynt=Ynt+B[j]*coef_IR[j];//IR
Ynt_Red=Ynt_Red+B[j]*coef_Red[j];//Red
}
// AFE44xx_SPO2_Data_buf[5]=Ynt;
for(j=0;j<High_pass_Orders-1;j++)
{
coef_IR[High_pass_Orders-1-j]=coef_IR[High_pass_Orders-1-j-1];//IR High_pass_Orders-1=933-1
coef_Red[High_pass_Orders-1-j]=coef_Red[High_pass_Orders-1-j-1];//Red
}
// Ynt_Disp=Ynt_Red+3000;
//Ynt_Disp=Ynt+200;
//Ynt_Disp=AFE44xx_SPO2_Data_buf[5];
Ynt_Disp=Ynt+3000;
/**************************************low pass filter*****************************************/
coef_low_IR[0]=(long)Ynt;
coef_low_Red[0]=(long)Ynt_Red;
for(j=0;j<Low_pass_Orders;j++)
{
Ynt=Ynt+coef_low_IR[j]*B_low[j];//IR
Ynt_Red=Ynt_Red+coef_low_Red[j]*B_low[j]; //Red
}
for(j=0;j<Low_pass_Orders-1;j++)
{
coef_low_IR[Low_pass_Orders-1-j]=coef_low_IR[Low_pass_Orders-1-j-1];
coef_low_Red[Low_pass_Orders-1-j]=coef_low_Red[Low_pass_Orders-1-j-1];
}
// Ynt=Ynt-3000;
// Ynt_Red=Ynt_Red-3000;
/**************************************compute Heart rate*****************************************/
if(k<N)
{
k++;
if(Lmax<Ynt){Lmax=Ynt;Tmax=k;}//get the max value
}
else
{
Win_Num++;
if(Tmax>4&&Tmax<N-4)//¶Ô·åÖµ»®¶¨Çø¼ä
{
z++;
if(z==1)
{ T_pre=Win_Num*N-N+Tmax;Lmax_pre=Lmax;}
else if(z==2)
{ Lmax_bac=Lmax;
T_bac=Win_Num*N-N+Tmax;
T_data=T_bac-T_pre;
if(T_data>125)
{
z=0;
Win_Num=0;
if(fabs(Lmax_pre-Lmax_bac)<150)
{
Fs=((250.0/(T_bac-T_pre))*60.0);
//******************ÏÔʾÐÄÂÊ**************/
Hex_to_dex_to_string((uint16_t)Fs,Str_Voltage,2);
OLED_ShowStr(60,2,Str_Voltage,3); //²âÊÔ6*12×Ö·û
}
}
else z=1;
}
}
k=0;
Lmax=0;
}
// //********************************************computer the spo2%***************************************************/
//
if(n<sample_rate)
{
XRed[n]=Ynt;
YIRed[n]=Ynt_Red;
n++;
XRed_Sum+=Ynt;
YIRed_Sum+= Ynt_Red;
}
else
{
n=0;
XRed_Avg=XRed_Sum/sample_rate*1.0;
YRed_Avg=YIRed_Sum/sample_rate*1.0;
for(j=0;j<sample_rate;j++)//
{
Lxy=(XRed[j]-XRed_Avg)*(YIRed[j]-YRed_Avg)*1.0+Lxy;
Lxx=(XRed[j]-XRed_Avg)*(XRed[j]-XRed_Avg)*1.0+Lxx;
Lyy=(YIRed[j]-YRed_Avg)*(YIRed[j]-YRed_Avg)*1.0+Lyy;
}
R=Lxy/sqrt(Lxx*Lyy)*100.0;
send（）；//我在此处调用
//**************ÏÔʾѪÑõÖµ%************/
Hex_to_dex_to_string((uint16_t)R,spo2_value,5);
OLED_ShowStr(60,0,spo2_value,3);
Lxy=0.0;
Lxx=0.0;
Lyy=0.0;
XRed_Sum=0;
YIRed_Sum=0;
}
// if(n<sample_rate)
// {
// XRed[n]=Ynt;
// YIRed[n++]=Ynt_Red;
// }
// else
// {
// for(j=0;j<sample_rate;j++)
// {
// XRed_Sum=XRed[j]+XRed_Sum;
// YIRed_Sum=YIRed[j]+YIRed_Sum;
// }
// n=0;
// XRed_Avg=XRed_Sum/sample_rate;
// YRed_Avg=YIRed_Sum/sample_rate;
// for(j=0;j<sample_rate;j++)//
// {
// Lxy=(XRed[j]-XRed_Avg)*(YIRed[j]-YRed_Avg)+Lxy;
// Lxx=(XRed[j]-XRed_Avg)*(XRed[j]-XRed_Avg)+Lxx;
// Lyy=(YIRed[j]-YRed_Avg)*(YIRed[j]-YRed_Avg)+Lyy;
// }
// R=Lxy/sqrt(Lxx*Lyy)*100;
// //**************ÏÔʾѪÑõÖµ%************/
// Hex_to_dex_to_string((uint16_t)R,spo2_value,5);
// OLED_ShowStr(60,0,spo2_value,3);
// XRed_Sum=0;
// YIRed_Sum=0;
// }
//*****************************PPG wave display***************************************************/
if((Freq_Dvider4++)%Divided_Fre==0)
{
Freq_Dvider4=1;
if(Disp_Flag==1){OLED_SetPos_x(x);Disp_Flag=0;}
OLED_Disp(x++,Ynt_Disp);
if(x==128)
{
x=0;
OLED_CLS_Wave();
}
}
Ynt_Red=0;
Ynt=0;
}
}
}
void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line0) != RESET)
{
readDataFlag = 1;
test++;
if((test)%500==250)
GPIO_ResetBits(GPIOB,GPIO_Pin_12);
if((test)%500==0)
GPIO_SetBits(GPIOB,GPIO_Pin_12);
EXTI_ClearITPendingBit(EXTI_Line0);
}
}
//************DMA通信*****************//
int send(void)
{
float SendBuff[2]; //ÉèÖ÷¢ËÍ»º³åÇø
float Fs=0.0, R=0.0;
RS232_Init(9600); //³õʼ»¯RS232
MYDMA_Config(DMA1_Channel7,(uint32_t)&USART2->DR,(uint32_t)SendBuff,8);
DMA_ITConfig(DMA1_Channel7, DMA_IT_TC, ENABLE);
AFE44xx_PowerOn_Init();
while(1)
{
SendBuff[0]=Fs;
SendBuff[1]=R;
USART_DMACmd(USART2,USART_DMAReq_Tx,ENABLE);
MYDMA_Enable(DMA1_Channel7);
while(DMA_GetITStatus(DMA1_FLAG_TC7)==RESET)
{
}
DMA_ClearITPendingBit(DMA1_FLAG_TC7);
}
}
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恩 是的 我知道啦
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