n32g457在rtt中使用us函数造成程序卡死

[复制链接]

388|0

手机看帖

扫描二维码
随时随地手机跟帖

电梯直达

楼主

18785275440|

楼主 | 2022-3-10 13:07 | 只看该作者回帖奖励

|倒序浏览 |阅读模式

这是us延时函数
void delay_us(rt_uint32_t nus)
{
      u32 temp;
      SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK); //select system clock
      SysTick->LOAD=nus*(SystemCoreClock/(1000000/RT_TICK_PER_SECOND)); //time relode
      SysTick->VAL=0x00;       //clear timer value
      SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk ;  //Start countdown
      do
      {
         temp=SysTick->CTRL;
      }
      while(temp&0x01&&!(temp&(1<<16)));//wait for the time reach
      SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk;    //close the count
      SysTick->VAL =0X00;    //clear timer value

}

msh >[W/UART] Warning: There is no enough buffer for saving data, please increase the RT_SERIAL_RB_BUFSZ option.
list_thread
thread pri  status    sp    stack size max used left tick  error
-------- ---  ------- ---------- ----------  ------  ---------- ---
serial3 9  suspend 0x000000a4 0x00000400 16% 0x0000000a 000
serial    9  suspend 0x000000b4 0x00000400 17% 0x0000000a 000
motor    9  suspend 0x000000ac 0x00000200 33% 0x0000000a 000
key       9  suspend 0x000000b4 0x00000200 35% 0x0000000a 000
read_adc  15  suspend 0x000000bc 0x00000200 46% 0x0000000a 000
tshell 20  running 0x000000cc 0x00001000 14% 0x0000000a 000
tidle0 31  ready 0x00000074 0x00000100 45% 0x00000020 000
timer    4  suspend 0x0000007c 0x00000200 24% 0x00000009 000
main    10  suspend 0x000000b8 0x00000800 17% 0x00000007 000
msh >

使用特权