bug反馈：中断号有问题

发布于 2022-04-15 18:50:23 浏览：939 订阅该版

```
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  42) void rt_interrupt_dispatch(rt_uint32_t fiq_irq)
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  43) {
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  44)     rt_isr_handler_t isr_func;
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  45)     rt_uint32_t volatile _mIPER, _mISNR;
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  46)     void *param;
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  47)
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  48)     /* Get irq number */
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  49)     _mIPER = (inpw(REG_AIC_IPER) >> 2) & 0x3f;
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  50)     _mISNR = inpw(REG_AIC_ISNR) & 0x3f;
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  51)
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  52)     if (_mISNR != 0)
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  53)     {
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  54)         if (_mIPER == _mISNR)
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  55)         {
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  56)             /* Get interrupt service routine */
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  57)             isr_func = irq_desc[_mISNR].handler;
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  58)             param = irq_desc[_mISNR].param;
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  59)
d74c785d00 (Wayne Lin 2021-11-10 16:20:21 +0800  60) #ifdef RT_USING_INTERRUPT_INFO
d74c785d00 (Wayne Lin 2021-11-10 16:20:21 +0800  61)             irq_desc[_mISNR].counter ++;
d74c785d00 (Wayne Lin 2021-11-10 16:20:21 +0800  62) #endif
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  63)
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  64)             /* Turn to interrupt service routine */
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  65)             isr_func(_mISNR, param);
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  66)         }
37f5236dfa (Wayne Lin 2021-08-03 09:07:09 +0800  67)     }
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  68)
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  69)     /* Handled the ISR. */
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  70)     outpw(REG_AIC_EOSCR, 1);
972aa93a27 (Wayne Lin 2021-05-12 19:15:17 +0800  71) }

```
第50行，为什么加上`“& 0x3f”？`都不看官方怎么写的代码吗？