ADS1292心电监测装置的STM32f4源码，SPI通信源程序 -

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "ADS1292.h"
#include "Timer.h"
#include "dma.h"
#define SEND_BUF_SIZE 8200 //发送数据长度,最好等于sizeof(TEXT_TO_SEND)+2的整数倍.
int main(void)
{
u8 res,i,sum;
u8 data_to_send[60];//串口发送缓存
u8 usbstatus=0;
u32 cannle[2]; //存储两个通道的数据
s32 p_Temp[2]; //数据缓存
data_to_send[0]=0xAA;
data_to_send[1]=0xAA;
data_to_send[2]=0xF1;
data_to_send[3]=8;
//初始化系统时钟 72M
SystemInit();
delay_init(168); //初始化延时函数
// delay_init();
delay_ms(100);
uart_init(115200); //串口初始化
//uart1_init(115200);//串口初始化为115200
// DMA_Config(DMA1_Channel4,(u32)&USART1->DR,(u32)data_to_send);//串口1DMA设置
MYDMA_Config(DMA2_Stream7,DMA_Channel_4,(u32)&USART1->DR,(u32)data_to_send,SEND_BUF_SIZE);//DMA2,STEAM7,CH4,外设为串口1,存储器为SendBuff,长度为:SEND_BUF_SIZE.
USART_DMACmd(USART1,USART_DMAReq_Tx,ENABLE); //DMA
// LED_Init();
// LED_Init1();
ADS1292_Init(); //初始化ads1292
while(Set_ADS1292_Collect(0))//0 正常采集 //1 1mV1Hz内部侧试信号 //2 内部短接噪声测试
{
printf("1292寄存器设置失败\r\n");
delay_ms(1000);
// DS3 =!DS3;
// DS4 =!DS4;
}
printf("寄存器设置成功\r\n");
delay_ms(1000);
// DS3 =LEDOFF;
// DS4 =LEDOFF;
TIM2_Init(10000,7200);//系统指示
//TIM4_Init(2000,7200);//按键消抖
EXTI->IMR |= EXTI_Line8;//开DRDY中断
while(1)//循环发送数据
{
LED1 =0;
if(ads1292_recive_flag)
{
cannle[0]=ads1292_Cache[3]<<16 | ads1292_Cache[4]<<8 | ads1292_Cache[5];//获取原始数据
cannle[1]=ads1292_Cache[6]<<16 | ads1292_Cache[7]<<8 | ads1292_Cache[8];
p_Temp[0] = get_volt(cannle[0]); //把采到的3个字节转成有符号32位数
p_Temp[1] = get_volt(cannle[1]); //把采到的3个字节转成有符号32位数
//有符号数为再转为无符号，无符号数为逻辑右移
cannle[0] = p_Temp[0];
cannle[1] = p_Temp[1];
data_to_send[4]=cannle[0]>>24; //25-32位
data_to_send[5]=cannle[0]>>16; //17-24
data_to_send[6]=cannle[0]>>8; //9-16
data_to_send[7]=cannle[0]; //1-8
data_to_send[8]=cannle[1]>>24; //25-32位
data_to_send[9]=cannle[1]>>16; //17-24
data_to_send[10]=cannle[1]>>8; //9-16
data_to_send[11]=cannle[1]; //1-8
for(i=0;i<12;i++)
sum += data_to_send[i];
data_to_send[12] = sum; //校验和
// DMA_Enable(DMA1_Channel4,13);//串口1DMA
MYDMA_Enable(DMA2_Stream7,SEND_BUF_SIZE);//开始一次DMA传输！
ads1292_recive_flag=0;
sum = 0;
}
}
}
/*功能：把采到的3个字节转成有符号32位数 */
s32 get_volt(u32 num)
{
s32 temp;
temp = num;
temp <<= 8;
temp >>= 8;
return temp;
}

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