STM32TCP通信中的ringbuffer程序
时间: 2024-03-02 08:54:24 浏览: 17
以下是一个基于STM32的TCP通信中使用ringbuffer的示例程序:
```c
#define RINGBUF_SIZE 512 // 定义ringbuffer的大小
typedef struct ringbuf {
uint8_t buffer[RINGBUF_SIZE];
volatile uint16_t head;
volatile uint16_t tail;
} ringbuf_t;
// 初始化ringbuffer
void ringbuf_init(ringbuf_t *ringbuf) {
ringbuf->head = 0;
ringbuf->tail = 0;
}
// 判断ringbuffer是否为空
bool ringbuf_is_empty(ringbuf_t *ringbuf) {
return (ringbuf->head == ringbuf->tail);
}
// 判断ringbuffer是否已满
bool ringbuf_is_full(ringbuf_t *ringbuf) {
return (((ringbuf->tail + 1) % RINGBUF_SIZE) == ringbuf->head);
}
// 向ringbuffer中写入数据
void ringbuf_put(ringbuf_t *ringbuf, uint8_t data) {
// 如果ringbuffer已满,则丢弃最旧的数据
if (ringbuf_is_full(ringbuf)) {
ringbuf->head = (ringbuf->head + 1) % RINGBUF_SIZE;
}
ringbuf->buffer[ringbuf->tail] = data;
ringbuf->tail = (ringbuf->tail + 1) % RINGBUF_SIZE;
}
// 从ringbuffer中读取数据
uint8_t ringbuf_get(ringbuf_t *ringbuf) {
uint8_t data = 0;
// 如果ringbuffer为空,则返回0
if (!ringbuf_is_empty(ringbuf)) {
data = ringbuf->buffer[ringbuf->head];
ringbuf->head = (ringbuf->head + 1) % RINGBUF_SIZE;
}
return data;
}
```
使用ringbuffer时,可以先初始化一个ringbuf_t类型的结构体,然后使用ringbuf_put()函数向ringbuffer中写入数据,使用ringbuf_get()函数从ringbuffer中读取数据。在使用ringbuffer时,需要注意保证写入和读取的顺序和速度匹配,避免数据丢失或混乱。