lanfeng0107 发表于 2016-3-19 16:46
请教些问题：
我看到在gwnpeter的帖子中他添加了那个结构体：
static SEGGER_RTT_CB _SEGGER_RTT = {

1. typedef struct {
   
2.   const     char*    sName;         // Optional name. Standard names so far are: "Terminal", "SysView", "J-Scope_t4i4"
   
3.             char*    pBuffer;       // Pointer to start of buffer
   
4.             unsigned SizeOfBuffer;  // Buffer size in bytes. Note that one byte is lost, as this implementation does not fill up the buffer in order to avoid the problem of being unable to distinguish between full and empty.
   
5.   volatile  unsigned WrOff;         // Position of next item to be written by either host (down-buffer) or target (up-buffer). Must be volatile since it may be modified by host (down-buffer)
   
6.   volatile  unsigned RdOff;         // Position of next item to be read by target (down-buffer) or host (up-buffer). Must be volatile since it may be modified by host (up-buffer)
   
7.             unsigned Flags;         // Contains configuration flags
   
8. } SEGGER_RTT_RING_BUFFER;
   
9. 
   
10. //
    
11. // RTT control block which describes the number of buffers available
    
12. // as well as the configuration for each buffer
    
13. //
    
14. //
    
15. typedef struct {
    
16.   char                    acID[16];                                 // Initialized to "SEGGER RTT"
    
17.   int                     MaxNumUpBuffers;                          // Initialized to SEGGER_RTT_MAX_NUM_UP_BUFFERS (type. 2)
    
18.   int                     MaxNumDownBuffers;                        // Initialized to SEGGER_RTT_MAX_NUM_DOWN_BUFFERS (type. 2)
    
19.   SEGGER_RTT_RING_BUFFER  aUp[SEGGER_RTT_MAX_NUM_UP_BUFFERS];       // Up buffers, transferring information up from target via debug probe to host
    
20.   SEGGER_RTT_RING_BUFFER  aDown[SEGGER_RTT_MAX_NUM_DOWN_BUFFERS];   // Down buffers, transferring information down from host via debug probe to target
    
21. } SEGGER_RTT_CB;