IAR 上的 C 编程

Question

我正在 IAR 平台上编写代码，并希望执行以下操作。我有一个 typedef 如下

struct timer {
  uint32_t start;
  uint32_t interval;
};

typedef (void) (*etimer_cb) (int,void*);

struct etimer {
  struct timer timer;
  struct etimer* next;
  etimer_cb p;
};

在这些之后我声明了以下变量:

struct etimer periodic;

但出现错误:

"periodic" is declared with a never completed type.

我该如何解决？

Answer 1

删除 ()来自 void .
uint32_t不是预定义类型。你需要#include <stdint.h> .

#include <stdint.h>
struct timer{
  uint32_t start;
  uint32_t interval;
};
typedef void (*etimer_cb)(int, void *);
struct etimer{
  struct timer timer;
  struct etimer* next;
  etimer_cb p;
};

但我更愿意不隐藏函数的指针

#include <stdint.h>
struct timer{
  uint32_t start;
  uint32_t interval;
};
typedef void etimer_cb(int, void *);
struct etimer{
  struct timer timer;
  struct etimer* next;
  etimer_cb *p;
};