是这样的,之前那个CO2传感器接收到的数据是乱的,所以想用环形缓冲区解决这个问题,但对环形缓冲区了解的不多,请大神指点指点,谢谢
#include "MyRingBuf.h"
#include "CO2_Sensor.h"
#include "string.h"
#include "stdbool.h"
void RingBufInit(RingBuf_TypeDef* ringBuf) //环形缓冲区初始化
{
memset(ringBuf, 0, sizeof(RingBuf_TypeDef));
ringBuf->pHead = ringBuf->pTail = ringBuf->buf;
}
bool RingBufRead(uint8_t* pData, RingBuf_TypeDef* ringBuf) //读缓冲区
{
if(ringBuf->pHead == ringBuf->pTail) //如果头尾接触表示缓冲区为空
{
return false;
}
else
{
*pData = *(ringBuf->pTail); //如果缓冲区非空则取头节点值并偏移头节点
ringBuf->pTail += 1;
if((uint32_t)ringBuf->pTail >= (uint32_t)ringBuf->buf+RING_BUF_LEN)
ringBuf->pTail = ringBuf->buf;
return true;
}
}
bool RingBufWrite(uint8_t* pData, RingBuf_TypeDef* ringBuf) //写缓冲区
{
if(ringBuf->pHead == ringBuf->pTail) //如果头尾接触表示缓冲区为空
{
return false;
}
else
{
*(ringBuf->pHead) = *pData; //如果缓冲区非空则取头节点值并偏移头节点
ringBuf->pHead += 1;
if((uint32_t)ringBuf->pHead >= (uint32_t)ringBuf->buf+RING_BUF_LEN)
ringBuf->pHead = ringBuf->buf;
return true;
}
}
uint8_t* GetRingBufTail(const RingBuf_TypeDef* ringBuf)
{
return ringBuf->pTail;
}
uint8_t* GetRingBufHead(const RingBuf_TypeDef* ringBuf)
{
return ringBuf->pHead;
}
void MoveRingBufTail(RingBuf_TypeDef* ringBuf, uint16_t len)
{
ringBuf->pTail -= len;
if (ringBuf->pTail < ringBuf->buf)
ringBuf->pTail += RING_BUF_LEN;
}
/**
* @brief读取环形缓冲区的字符,直到以指定结束字符
* @param *recBuf:接收buffer,用于保存读取到的数据
* @param ringBuf:环形缓冲区
* @param len: 长度
* @return 成功或失败
*/
bool ReadRingBuffToChar(uint8_t* recBuf,RingBuf_TypeDef* ringBuf, uint16_t len) //读取缓冲区字符
{
uint8_t* p = recBuf;
for (uint16_t i = 0; i < len; i++)
{
if (!RingBufRead(p++, ringBuf))
return false;
}
return true;
}
这个是创建一个环形缓冲区;;;;
#include "CO2_Sensor.h"
#include "MyRingBuf.h"
#include "timer.h"
#include "usart.h"
#include "MyUsart.h"
CO2Sensor CO2;
void CO2_config(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6,ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC,ENABLE);
SysTick_Config_Init();
CO2_gpio_config();
CO2_usart_config();
co2_nvic_config();
//co2_receivedata();
co2_data_anl();
usart_config();
CO2_unpack();
}
void CO2_gpio_config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; //USART6
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(GPIOC,&GPIO_InitStructure);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource0, GPIO_AF_2); //TX
GPIO_PinAFConfig(GPIOC, GPIO_PinSource1, GPIO_AF_2); //RX
}
void CO2_usart_config(void)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600; /*波特率*/
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; /*流控*/
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; /*数据位,8*/
USART_InitStructure.USART_Parity = USART_Parity_No; /*校验位,n*/
USART_InitStructure.USART_StopBits = USART_StopBits_1; /*停止位,1*/
USART_Init(USART6,&USART_InitStructure);
USART_ClearFlag(USART6,USART_FLAG_TC); //清除发送完成标志位
USART_Cmd(USART6,ENABLE); //使能串口3
USART_ITConfig(USART6,USART_IT_RXNE,ENABLE);
}
void co2_nvic_config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannel = USART3_6_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void CO2_Sensor_interrupt(void)
{
uint8_t receive_data;
if(USART_GetITStatus(USART6,USART_IT_RXNE) != RESET)
{
USART_ClearITPendingBit(USART6,USART_IT_RXNE);
receive_data = USART_ReceiveData(USART6); //接收USART6的数据
CO2.data_buf[CO2.counter] = receive_data;
CO2.counter++;
if(CO2.counter > 11)
{
CO2.counter = 0;
}
}
}
void co2_sendata(void)
{
CO2.sendbuf[0] = 0x42;
CO2.sendbuf[1] = 0x4D;
CO2.sendbuf[2] = 0xE3;
CO2.sendbuf[3] = 0x58;
CO2.sendbuf[4] = 0x58;
CO2.sendbuf[5] = 0x02;
CO2.sendbuf[6] = 0x22;
usart_send_data(USART6,CO2.sendbuf,7);
}
void CO2_unpack(void)
{
for (int i = 0; i < 12; i++)
{
if (CO2.data_buf[i] == 0x42 && CO2.data_buf[(i+1)%12] == 0x4D)
{
CO2.ppm = (int)CO2.data_buf[(i+4)%12]*256+(int)CO2.data_buf[(i+5)%12];
}
co2_data_anl();
}
}
uint8_t co2_data_anl(void) //解析数据
{
for(CO2.counter = 0; CO2.counter < 10; CO2.counter++)
{
CO2.total += CO2.data_buf[CO2.counter];
}
CO2.total1 = CO2.data_buf[10] + CO2.data_buf[11];
if(CO2.total == CO2.total1)
{
return CO2.total1; //校验正确
}
else
{
return 0; //校验错误
}
}
这是传感器部分的代码,,求大神指点一下谢谢;
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