用C语言实现公共无线接口协议
时间: 2024-01-21 18:13:46 浏览: 29
CPRI(公共无线接口协议)是一种数字化的接口协议,用于BBU和RRU之间的通信。下面是一个简单的用C语言实现CPRI协议的示例:
```
#include <stdio.h>
#include <stdlib.h>
#define CPRI_HEADER_SIZE 4
// 定义CPRI帧结构体
typedef struct {
unsigned short length; // 帧长度
unsigned char type; // 帧类型
unsigned char id; // 帧ID
unsigned char data[]; // 数据部分
} CPRI_Frame;
// 定义CPRI帧类型
typedef enum {
CPRI_TYPE_CONTROL = 0x00, // 控制帧
CPRI_TYPE_DATA = 0x01 // 数据帧
} CPRI_FrameType;
// 定义CPRI帧ID
typedef enum {
CPRI_ID_ZERO = 0x00, // ID为0
CPRI_ID_ONE = 0x01 // ID为1
} CPRI_FrameID;
// 创建一个CPRI帧
CPRI_Frame* create_cpri_frame(unsigned short length, unsigned char type, unsigned char id) {
CPRI_Frame* frame = (CPRI_Frame*)malloc(sizeof(CPRI_Frame) + length - 1);
frame->length = length;
frame->type = type;
frame->id = id;
return frame;
}
// 销毁一个CPRI帧
void destroy_cpri_frame(CPRI_Frame* frame) {
free(frame);
}
int main() {
// 创建一个CPRI控制帧
CPRI_Frame* control_frame = create_cpri_frame(CPRI_HEADER_SIZE, CPRI_TYPE_CONTROL, CPRI_ID_ZERO);
printf("Control frame length: %d\n", control_frame->length);
printf("Control frame type: %d\n", control_frame->type);
printf("Control frame ID: %d\n", control_frame->id);
// 创建一个CPRI数据帧
unsigned char data[] = {0x01, 0x02, 0x03};
unsigned short data_length = sizeof(data) / sizeof(unsigned char);
CPRI_Frame* data_frame = create_cpri_frame(CPRI_HEADER_SIZE + data_length, CPRI_TYPE_DATA, CPRI_ID_ONE);
memcpy(data_frame->data, data, data_length);
printf("Data frame length: %d\n", data_frame->length);
printf("Data frame type: %d\n", data_frame->type);
printf("Data frame ID: %d\n", data_frame->id);
printf("Data frame data: ");
for (int i = 0; i < data_length; i++) {
printf("%02X ", data_frame->data[i]);
}
printf("\n");
// 销毁帧
destroy_cpri_frame(control_frame);
destroy_cpri_frame(data_frame);
return 0;
}
```
上述示例中,我们定义了CPRI帧的结构体和相关枚举类型,然后通过`create_cpri_frame`函数创建了一个CPRI帧,并通过`destroy_cpri_frame`函数销毁了这个帧。在`main`函数中,我们创建了一个CPRI控制帧和一个CPRI数据帧,分别输出了它们的长度、类型、ID和数据部分。