277 lines
9.0 KiB
C
277 lines
9.0 KiB
C
/**
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* @file EV1527.c
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* @author cyWu (1917507415@qq.com)
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* @brief EV1527解码框架，定时器中断的方式解码，使用80us的定时器，直接放中断服务函数就可以，适用于所有单片机。
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* @version 0.1
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* @date 2024-03-28
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* @copyright Copyright (c) 2024
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*
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*/
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#include "EV1527.h"
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// 定时周期
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#define TIME_CYCLE 80
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// 定义引导码的最小和最大持续时间（单位：us）
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#define MIN_LEAD_CODE (5600 / TIME_CYCLE)
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#define MAX_LEAD_CODE (16000 / TIME_CYCLE)
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// 定义数据位持续时间的最小和最大范围（单位：us）
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#define MIN_BIT_DURATION (80 / TIME_CYCLE)
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#define MAX_BIT_DURATION (2400 / TIME_CYCLE)
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// 定义功能字节在接收缓冲区中的索引位置
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#define FUNCTION_BYTE_INDEX 2
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// 定义功能值
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#define FUNCTION_1 0x08
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#define FUNCTION_2 0x04
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#define FUNCTION_3 0x02
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#define FUNCTION_4 0X01
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#define FUNCTION_5 0X03
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#define FUNCTION_6 0X05
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#define FUNCTION_7 0X07
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#define FUNCTION_8 0X00
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// 定义数据解码状态枚举
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typedef enum
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{
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LEAD_CODE, // 引导码状态
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HIGH_BIT, // 高位数据位状态
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LOW_BIT, // 低位数据位状态
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DATA_PROCESS, // 数据处理状态
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FUNCTION_PROCESS // 功能处理状态
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} Decode_State_t;
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// 定义全局变量和缓冲区
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#define ARRAY_SIZE 128
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static uint32_t Lead_Code_Count = 0; // 引导码计数
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static uint32_t High_Bit_Count = 0; // 高位数据位计数
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static uint32_t Low_Bit_Count = 0; // 低位数据位计数
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static uint32_t High_Bit_Duration = 0; // 高位数据位持续时间
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static uint32_t Low_Bit_Duration = 0; // 低位数据位持续时间
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static uint8_t Received_Buffer[ARRAY_SIZE] = {0}; // 接收数据缓冲区
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static uint8_t lastDataArray[ARRAY_SIZE] = {0}; // 上一次接收数据缓冲区
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static uint8_t Received_Byte_Count = 0; // 接收数据字节计数
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static uint8_t consecutiveEqualCount = 0; // 数据接收相同计数
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static uint8_t Bit_Count = 0; // 接收数据位计数
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static uint8_t Received_Data = 0; // 接收到的数据
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static Decode_State_t RF_Decode_State = LEAD_CODE; // 数据解码状态
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void Decode_Data(void);
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void Execute_Function(void);
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void Reset_Decode_Parameters(void);
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/**----------------------------------------------------------------------------------------------**
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**函数名 ：EV1527端口配置
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**功能说明：初始化IO口，不同单片机的配置输入模式不一样，自行修改。
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**----------------------------------------------------------------------------------------------**/
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void EV1527_Init(void)
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{
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DATA_433_GPIO_CLK_ENABLE();
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GPIO_InitTypeDef GPIO_InitStruct;
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// 配置上拉输入
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GPIO_InitStruct.Pin = DATA_433_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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HAL_GPIO_Init(DATA_433_GPIO_PORT, &GPIO_InitStruct);
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}
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/**----------------------------------------------------------------------------------------------**
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**函数名 ：RF信号解码函数
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**功能说明：解码从433MHz接收到的信号，并根据解码结果执行相应功能
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**调用说明：80us调用一次
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**----------------------------------------------------------------------------------------------**/
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void RF_Signal_Decode(void)
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{
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switch (RF_Decode_State)
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{
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case LEAD_CODE: // 引导码
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// 判断是否低电平
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if (HAL_GPIO_ReadPin(DATA_433_GPIO_PORT, DATA_433_PIN) == GPIO_PIN_RESET)
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{
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Lead_Code_Count++;
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}
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else // 高电平判断范围
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{
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// 判断引导码范围是否合法
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if (Lead_Code_Count >= MIN_LEAD_CODE && Lead_Code_Count <= MAX_LEAD_CODE)
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{
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Lead_Code_Count = 0;
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Reset_Decode_Parameters(); // 重置解码参数
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RF_Decode_State = HIGH_BIT; // 进入高位数据位判断状态
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}
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else
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{
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Reset_Decode_Parameters(); // 引导码范围不合法，重置解码参数
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}
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}
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break;
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case HIGH_BIT:
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// 判断是否高电平
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if (HAL_GPIO_ReadPin(DATA_433_GPIO_PORT, DATA_433_PIN) == GPIO_PIN_SET)
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{
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High_Bit_Count++;
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}
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else // 低电平判断范围
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{
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// 判断高位数据位范围是否合法
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if (High_Bit_Count >= MIN_BIT_DURATION && High_Bit_Count <= MAX_BIT_DURATION)
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{
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High_Bit_Duration = High_Bit_Count; // 保存计数值，用于区分0和1
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High_Bit_Count = 0;
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RF_Decode_State = LOW_BIT; // 进入低位数据位判断状态
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}
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else
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{
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Reset_Decode_Parameters(); // 高位数据位范围不合法，重置解码参数
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}
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}
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break;
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case LOW_BIT:
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// 判断是否低电平
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if (HAL_GPIO_ReadPin(DATA_433_GPIO_PORT, DATA_433_PIN) == GPIO_PIN_RESET)
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{
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Low_Bit_Count++;
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}
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else // 高电平判断范围
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{
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// 判断低位数据位范围是否合法
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if (Low_Bit_Count >= MIN_BIT_DURATION && Low_Bit_Count <= MAX_BIT_DURATION)
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{
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Low_Bit_Duration = Low_Bit_Count; // 保存计数值，用于区分0和1
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Low_Bit_Count = 0;
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RF_Decode_State = DATA_PROCESS; // 进入数据处理状态
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}
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else
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{
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Reset_Decode_Parameters(); // 低位数据位范围不合法，重置解码参数
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}
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}
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break;
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case DATA_PROCESS:
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Decode_Data(); // 解码数据
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if (Received_Byte_Count == 3)
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{
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// 接收到全部数据，包括地址和数据
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RF_Decode_State = FUNCTION_PROCESS;
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}
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else
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{ // 数据没接收完
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RF_Decode_State = HIGH_BIT; // 继续解码数据
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}
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break;
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case FUNCTION_PROCESS:
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Execute_Function(); // 执行功能
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Reset_Decode_Parameters(); // 重置解码参数
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break;
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default:
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Reset_Decode_Parameters(); // 默认状态，重置解码参数
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break;
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}
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}
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/**----------------------------------------------------------------------------------------------**
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**函数名 ：Reset_Decode_Parameters
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**功能说明：重置解码参数，用于开始新的解码周期
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**----------------------------------------------------------------------------------------------**/
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void Reset_Decode_Parameters(void)
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{
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Bit_Count = 0;
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Received_Data = 0x00;
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Received_Byte_Count = 0;
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Lead_Code_Count = 0;
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High_Bit_Count = 0;
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Low_Bit_Count = 0;
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High_Bit_Duration = 0;
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Low_Bit_Duration = 0;
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RF_Decode_State = LEAD_CODE;
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}
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/**----------------------------------------------------------------------------------------------**
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**函数名 ：Decode_Data
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**功能说明：解码数据位，将解码后的数据存入相应的缓冲区中
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**----------------------------------------------------------------------------------------------**/
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void Decode_Data(void)
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{
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Received_Data <<= 1;
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// 根据高低电平持续时间判断0和1，然后将数据移位存入缓冲区
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if (High_Bit_Duration > Low_Bit_Duration)
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{
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Received_Data |= 0x01;
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}
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else
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{
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Received_Data &= 0xFE;
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}
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Bit_Count++;
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// 每接收8位数据，存入数据数组
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if (Bit_Count == 8)
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{
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Received_Buffer[Received_Byte_Count] = Received_Data;
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Received_Data = 0x00;
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Bit_Count = 0;
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Received_Byte_Count++;
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}
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}
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/**----------------------------------------------------------------------------------------------**
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**函数名 ：Execute_Function
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**功能说明：执行功能，根据解码后的数据进行相应操作
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**----------------------------------------------------------------------------------------------**/
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void Execute_Function(void)
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{
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// 判断解码后的功能字节，并执行相应操作
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switch (Received_Buffer[FUNCTION_BYTE_INDEX])
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{
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case FUNCTION_1:
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// 执行功能1
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printf("\r\n Function_1 \r\n");
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break;
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case FUNCTION_2:
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// 执行功能2
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printf("\r\n Function_2 \r\n");
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break;
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case FUNCTION_3:
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// 执行功能3
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printf("\r\n Function_3 \r\n");
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break;
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case FUNCTION_4:
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// 执行功能4
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printf("\r\n Function_4 \r\n");
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break;
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case FUNCTION_5:
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// 执行功能5
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printf("\r\n Function_5 \r\n");
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break;
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case FUNCTION_6:
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// 执行功能6
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printf("\r\n Function_6 \r\n");
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break;
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case FUNCTION_7:
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// 执行功能7
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printf("\r\n Function_7 \r\n");
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break;
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case FUNCTION_8:
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// 执行功能8
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printf("\r\n Function_8 \r\n");
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break;
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default:
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// 默认操作
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printf("\r\n --- code =%02x",Received_Buffer[FUNCTION_BYTE_INDEX]);
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break;
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}
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}
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