使用rtthread systemview工程报错

发布于 2019-01-24 10:37:23 浏览：3203 订阅该版

7 个回答

flyboy 2019-01-24

Do my self();

zohar 2019-01-24

这家伙很懒，什么也没写！

zohar 2019-01-24

这家伙很懒，什么也没写！

zohar 2019-01-24

这家伙很懒，什么也没写！

通过修改代码，测试成功了。故另开一层说明修改内容：
1、env 配置工具中，Version 选择 lastest，这样工程中多了一个 `SEGGER_RTT_DEVICE.c` 文件

2、在 `SysTick_Handler()` 函数中添加代码

```
SEGGER_SYSVIEW_TickCnt++；
```

为了不报错误，在本文件中要定义变量

```c
unsigned int SEGGER_SYSVIEW_TickCnt;
```

3、在 `SEGGER_SYSVIEW_Config_RTThread.c` 文件中添加如下代码：

```c
extern unsigned int SEGGER_SYSVIEW_TickCnt;

/********************************************************************* 
* 
*       Defines, fixed 
* 
********************************************************************** 
*/
#define SCB_ICSR (*(volatile U32 *)(0xE000ED04uL)) // Interrupt Control State Register
#define SCB_ICSR_PENDSTSET_MASK (1UL << 26)        // SysTick pending bit
#define SYST_RVR (*(volatile U32 *)(0xE000E014uL)) // SysTick Reload Value Register
#define SYST_CVR (*(volatile U32 *)(0xE000E018uL)) // SysTick Current Value Register
/********************************************************************* 
* 
*       SEGGER_SYSVIEW_X_GetTimestamp() 
* 
* Function description 
*   Returns the current timestamp in ticks using the system tick  
*   count and the SysTick counter. 
*   All parameters of the SysTick have to be known and are set via 
*   configuration defines on top of the file. 
* 
* Return value 
*   The current timestamp. 
* 
* * Additional information 
*   SEGGER_SYSVIEW_X_GetTimestamp is always called when interrupts are 
*   disabled. Therefore locking here is not required. 
*/
U32 SEGGER_SYSVIEW_X_GetTimestamp(void)
{
    U32 TickCount;
    U32 Cycles;
    U32 CyclesPerTick;
    //
    // Get the cycles of the current system tick.
    // SysTick is down-counting, subtract the current value from the number of cycles per
    //
    CyclesPerTick = SYST_RVR + 1;
    Cycles = (CyclesPerTick - SYST_CVR);
    //
    // Get the system tick count.
    //
    TickCount = SEGGER_SYSVIEW_TickCnt;
    //
    // If a SysTick interrupt is pending, re-read timer and adjust result
    //
    if ((SCB_ICSR & SCB_ICSR_PENDSTSET_MASK) != 0)
    {
        Cycles = (CyclesPerTick - SYST_CVR);
        TickCount++;
    }
    Cycles += TickCount * CyclesPerTick;

return Cycles;
}
```

在文件末尾添加即可