使用定时器来精确控制数据发送的时间间隙，保证和其他小板不冲突

source/rt_thread/board.h

@@ -58,6 +58,18 @@ typedef struct __gpioout_def{
 
 
 
+typedef struct __timer_def{
+  const char *name;
+  int (*init)(struct __timer_def *u);
+  int (*deinit)(struct __timer_def *u);
+  uint32_t (*read)(struct __timer_def *u);
+  int (*write)(struct __timer_def *u,const uint32_t value);
+  void *private_data;
+}timer_def;
+
+
+
+
 
 #define CHECK_DO(s,to) if(s) {to(s);}
 
@@ -136,7 +148,26 @@ typedef struct __gpioout_def{
   };
 
   
-  
+
+
+#define timer_init_export(name_,init_,deinit_,read_,write_,priv_) \
+  const static char __dev_##name_##_name[] SECTION(".rodata.devstr") = #name_; \
+  RT_USED static timer_def _timer_##name_={\
+    .name=__dev_##name_##_name,\
+    .init=init_,\
+    .deinit=deinit_,\
+    .read=read_,\
+    .write=write_,\
+    .private_data=priv_,\
+  };\
+  RT_USED static const struct dev_struct __dev_##name_ SECTION("devstruct")= \
+  {                         \
+    __dev_##name_##_name,   \
+    &_timer_##name_,                   \
+  };
+
+
+
   
 struct init_struct{
   int (*init_fun)(void);