在上一次的基础上添加了不同需求缓冲区大小可变的更改。
1 /* 2 * 串口的FIFO简单读取实现 3 * 功能，实现串口的FIFO实现 4 * 使用方法： 5 * 更新时间：2017.9.26 6 * 版本：v2.0.0 7 * 编写：ZhangPeng 8 */ 9 #include "stdio.h" 10 #include <stdlib.h> 11 #include "df_fifo.h" 12 #include <memory.h> 13 /* 14 * 函数功能：Fifo出队操作 15 * 入口参数 16 参数1：缓冲区句柄 17 参数2：要出队的指针地址 18 参数3：出队的个数 19 * 出口参数：是否出队成功 20 * 注意事项：该函数只从头指针开始读取，length个字节，不会影响缓冲区数据 21 */ 22 Df_StateTypeDef Df_FifoOutput(Df_FifoPointTypeDef kfifo, uint8_t * buf, uint8_t length) 23 { 24 Df_FifoStructTypeDef Pfifo; 25 Pfifo = *kfifo; 26 if (Pfifo.Count - length < 0)//缓冲区没有足够的数据 27 { 28 return Df_StateOutOver;//读数据越界 29 } 30 while (length--) 31 { 32 *buf = Pfifo.buffer[Pfifo.read]; 33 buf++; 34 Pfifo.read++;//读取指针自加 35 if (Pfifo.read == Pfifo.length) 36 { 37 Pfifo.read = 0; 38 } 39 } 40 return Df_StateOk;//数据读取成功 41 } 42 43 /* 44 * 函数功能：Fifo入队操作 45 * 入口参数 46 参数1：缓冲区句柄 47 参数2：要入队的指针地址 48 参数3：入队的个数 49 * 出口参数：是否入队成功 50 * 注意事项：该函数在缓冲区满的时候会返回Over 51 */ 52 Df_StateTypeDef Df_FifoInput(Df_FifoPointTypeDef Pfifo, uint8_t * buf, uint8_t length)// 53 { 54 if (Pfifo->Count + length > Pfifo->length)//写入的数据超过缓冲区 55 { 56 return Df_StateInOver;//写数据越界 57 } 58 while (length--) 59 { 60 Pfifo->buffer[Pfifo->write] = *buf;//赋值给缓冲区 61 buf++;//缓冲区地址加一 62 Pfifo->Count++; 63 Pfifo->write++;// 64 if (Pfifo->write == Pfifo->length) 65 { 66 Pfifo->write = 0; 67 } 68 } 69 return Df_StateOk;//数据读取成功 70 } 71 72 /* 73 * 函数功能：缓冲区擦除操作 74 * 入口参数 75 参数1：缓冲区句柄 76 参数2：擦除的数据长度 77 * 出口参数：是否擦除 78 * 注意事项：该函数会将缓冲区头开始的length个数据从缓冲区擦除 79 */ 80 Df_StateTypeDef Df_FifoErase(Df_FifoPointTypeDef Pfifo, uint8_t length)// 81 { 82 if (Pfifo->Count - length > Pfifo->length)//写入的数据超过缓冲区 83 { 84 return Df_StateEaserOver;//写数据越界 85 } 86 while (length--) 87 { 88 Pfifo->Count--; 89 Pfifo->read++;// 90 if (Pfifo->read == Pfifo->length) 91 { 92 Pfifo->read = 0; 93 } 94 } 95 return Df_StateOk;//数据读取成功 96 } 97 98 /* 99 * 函数功能：重置缓冲区 100 * 入口参数 101 参数1：缓冲区句柄 102 参数2：缓冲区数组首地址 103 参数3：缓冲区的大小 104 * 出口参数：是否重置成功 105 * 注意事项：length不能小于buf 的长度否则会导致内存泄漏 106 */ 107 Df_StateTypeDef Df_FifoReset(Df_FifoPointTypeDef Pfifo,uint8_t * buf,uint16_t length) 108 { 109 printf("[%s]the buffer length is %d ", __FUNCTION__, sizeof(buf)); 110 Pfifo->buffer = buf;//缓冲区数组 111 Pfifo->length = length;//缓冲区大小 112 Pfifo->Count = 0;//数据为空 113 Pfifo->read = 0;//读指针为0 114 Pfifo->write = 0;//写指针为0 115 return Df_StateOk; 116 } 117 118 /* 119 * 函数功能：Fifo出队操作 120 * 入口参数 121 参数1：缓冲区句柄 122 参数2：要出队的指针地址 123 参数3：出队的个数 124 * 出口参数：是否出队成功 125 * 注意事项：该函数只从头指针开始读取，length个字节，同时擦除该部分数据 126 */ 127 Df_StateTypeDef Df_FifoOutEaser(Df_FifoPointTypeDef Pfifo, uint8_t * buf, uint8_t length) 128 { 129 if (Pfifo->Count - length < 0)//缓冲区没有足够的数据 130 { 131 return Df_StateOutOver;//读数据越界 132 } 133 while (length--) 134 { 135 *buf = Pfifo->buffer[Pfifo->read]; 136 buf++; 137 Pfifo->Count--; 138 Pfifo->read++;//读取指针自加 139 if (Pfifo->read == Pfifo->length) 140 { 141 Pfifo->read = 0; 142 } 143 } 144 return Df_StateOk;//数据读取成功 145 } 146 #define debug 1//是否打印缓冲区状态 147 /*测试*/ 148 int main() 149 { 150 Df_FifoStructTypeDef Fifostructdefine; 151 uint8_t buffer[100];//定义缓冲区 152 memset(buffer, 0, 100 * sizeof(uint8_t));//初始化缓冲区 153 uint8_t data[100];//定义应用数组 154 uint8_t test[100];// 155 memset(test, 0, 100*sizeof(uint8_t)); 156 for (int i = 0; i < 100; i++) 157 data[i] = i; 158 Df_FifoReset(&Fifostructdefine, buffer, 100);//初始化缓冲区结构 159 #if debug 160 printf("The buffer count is %d ", Fifostructdefine.Count); 161 printf("The buffer length is %d ", Fifostructdefine.length); 162 printf("The buffer Pread is %d ", Fifostructdefine.read); 163 printf("The buffer Pwrite is %d ", Fifostructdefine.write); 164 #endif // debug 165 printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>写入测试<<<<<<<<<<<<<<<<<<<<<<< "); 166 Df_FifoInput(&Fifostructdefine, data, 100); 167 #if debug 168 printf("The buffer count is %d ", Fifostructdefine.Count); 169 printf("The buffer length is %d ", Fifostructdefine.length); 170 printf("The buffer Pread is %d ", Fifostructdefine.read); 171 printf("The buffer Pwrite is %d ", Fifostructdefine.write); 172 #endif // debug 173 /*直接读取测试*/ 174 printf(">>>>>>>>>>>>>>>>>>>>>>>>>直接读取测试<<<<<<<<<<<<<<<<<<<<<<< "); 175 Df_FifoOutput(&Fifostructdefine, &test, 50); 176 for (int i = 1;i <51;i++) 177 { 178 printf("test[%d] = %d ", i-1, test[i-1]); 179 if (i % 5 == 0) 180 { 181 printf(" "); 182 } 183 } 184 #if debug 185 printf("The buffer count is %d ", Fifostructdefine.Count); 186 printf("The buffer length is %d ", Fifostructdefine.length); 187 printf("The buffer Pread is %d ", Fifostructdefine.read); 188 printf("The buffer Pwrite is %d ", Fifostructdefine.write); 189 #endif // debug 190 /*擦除测试*/ 191 printf(">>>>>>>>>>>>>>>>>>>>>擦除测试<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< "); 192 Df_FifoErase(&Fifostructdefine, 30); 193 #if debug 194 printf("The buffer count is %d ", Fifostructdefine.Count); 195 printf("The buffer length is %d ", Fifostructdefine.length); 196 printf("The buffer Pread is %d ", Fifostructdefine.read); 197 printf("The buffer Pwrite is %d ", Fifostructdefine.write); 198 #endif // debug 199 /*读取擦除测试*/ 200 printf(">>>>>>>>>>>>>>>>>>>>>读取擦除测试<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< "); 201 while (Df_FifoOutEaser(&Fifostructdefine,&data[0],1) == Df_StateOk) 202 { 203 printf("Df_FifoOutEaser data is %d ", data[0]); 204 } 205 #if debug 206 printf("The buffer count is %d ", Fifostructdefine.Count); 207 printf("The buffer length is %d ", Fifostructdefine.length); 208 printf("The buffer Pread is %d ", Fifostructdefine.read); 209 printf("The buffer Pwrite is %d ", Fifostructdefine.write); 210 #endif // debug 211 system("pause"); 212 }
.h文件
1 #ifndef _DF_FIFO_H 2 #define _DF_FIFO_H 3 #define uint8_t unsigned char 4 #define uint16_t unsigned int 5 /*该参数设置接受区大小*/ 6 7 typedef struct { 8 9 int read;//读指针 10 int write;//写指针 11 int Count;//缓冲区计数 12 int length;//缓冲区大小 13 uint8_t * buffer;// [RECERIVRSIZE];//接受缓冲区 14 }Df_FifoStructTypeDef, *Df_FifoPointTypeDef; 15 16 17 typedef enum Df_StateTypeDef 18 { 19 Df_StateOk,//成功 20 Df_StateErr,//失败 21 Df_StateTimeout,//超时 22 Df_StateOutOver,//读溢出 23 Df_StateInOver,//写溢出 24 Df_StateEaserOver//擦除溢出 25 }Df_StateTypeDef; 26 27 28 Df_StateTypeDef Df_FifoInput(Df_FifoPointTypeDef Pfifo, uint8_t * buf, uint8_t length); 29 Df_StateTypeDef Df_FifoOutput(Df_FifoPointTypeDef Pfifo, uint8_t * buf, uint8_t length); 30 Df_StateTypeDef Df_FifoErase(Df_FifoPointTypeDef Pfifo, uint8_t length); 31 Df_StateTypeDef Df_FifoReset(Df_FifoPointTypeDef Pfifo, uint8_t * buf, uint16_t length); 32 33 34 #endif /*_DF_FIFO_H*/
该版本同样的使用静态队列实现，添加了擦除输出函数，只输出不删除函数，和删除函数，静态队列长度根据不同的应用可以自定义