PieCtrlRegs.PIEACK.all = 0xFFFF
时间: 2024-05-24 18:12:20 浏览: 17
The above line of code clears all pending interrupts in the PIE (Peripheral Interrupt Expansion) controller module by setting the PIEACK (PIE Acknowledge) register to 0xFFFF. This is a common practice in interrupt handling routines to ensure that no pending interrupts are left unprocessed. The PIEACK register contains a bit mask of all active interrupts, and setting it to 0xFFFF clears all bits, indicating that all interrupts have been serviced.
相关问题
PieCtrlRegs.PIEIER1.bit.INTx7 = 0; //禁止CPUTimer0中断 asm(" rpt #4 ||nop"); IFR &= (~M_INT1); PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; EINT;
这段代码是使用 C 语言编写的,它的作用是禁止 CPUTimer0 的中断,并且清除相关的中断标志位。让我解释一下:
1. `PieCtrlRegs.PIEIER1.bit.INTx7 = 0;` 这一行代码将 CPUTimer0 的中断使能位设置为 0,即禁止中断。
2. `asm(" rpt #4 ||nop");` 这是一条汇编指令,它用于延迟执行,确保中断使能位的修改已经生效。
3. `IFR &= (~M_INT1);` 这一行代码将中断标志位的相应位清零,以确保中断触发后不会立即再次触发。
4. `PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;` 这一行代码用于清除 PIE 控制器中的中断标志。它将 PIEACK 寄存器设置为 PIEACK_GROUP1,表示清除 Group 1 类别的中断标志。
5. `EINT;` 这是一个宏定义,用于使能全局中断。
总的来说,这段代码的目的是禁止 CPUTimer0 的中断,并且清除相关的中断标志位,以确保中断的正确处理。
PieCtrlRegs.PIECTRL.bit.ENPIE = 0;
This line of code disables all PIE interrupts by setting the ENPIE bit of the PIECTRL register to 0. PIE stands for Peripheral Interrupt Expansion, and is a feature of certain microcontrollers that allows them to handle interrupts from external devices. By disabling all PIE interrupts, the microcontroller will not respond to any interrupt requests from external devices.
相关推荐
![docx](https://img-home.csdnimg.cn/images/20210720083331.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)