note 1:  Several interrupts can be pending at the same time. When an interrupt request is not serviced immediately, it is latched and then processed when its software priority combined with the hardware priority becomes the highest one. note 2: From…

In my older blog "PIC32MZ tutorial -- Key Debounce", I shows how to acheive key debounce with port polling. At this moment, I write an application which uses External Interrupt.  Therefore, only generates interrupt and starts debounce when the f…

External Input Counter and External interrupt : count the input signal from the button. So what is the different between two methods ? While external interrupt needs to jump into the interrupt routine to do the increment or decrement of a variable, c…

How can you add extra hardware UARTs to a 32bit TMS470 ARM7-based microcontroller at zero cost? Solution: Designers can use the high-end timer (HET) peripheral found on all Texas Instruments ARM7-based, 32-bit TMS470 microcontrollers to implement add…

外部中斷(External Interupt) 在MCU中是很常見而且很常用到的基本function,所以就不多做解釋.不過因為每顆MCU的配置都不太一樣所以在此記錄下來. External Interrupt 配置 void EXIT_GPIO_Config(void) { GPIO_InitTypeDef GPIO_Config; EXTI_InitTypeDef EXTI_Config; NVIC_InitTypeDef NVIC_Config; RCC_AHB1PeriphClockCm…

EXTI控制器的主要特点如下: 每个中断/事件线上的独立触发器和掩码 每个中断行的专用状态位 生成最多20个软件事件/中断请求 脉冲宽度小于APB2时钟周期的外部信号检测. 每条中断线路的专用状态位生成最多20个软件事件/中断请求检测脉冲宽度小于APB 2时钟周期的外部信号.…

The STM32F4xx are able to handle external or internal events in order to wake up the core (WFE). The wakeup event can be generated either by: (I've removed normal external interrupt mode details) or configuring an external or internal EXTI line in ev…

STM32F4 External interrupts Each STM32F4 device has 23 external interrupt or event sources. They are split into 2 sections. First interrupt section is for external pins (P0 to P15) on each port, and other section is for other events, like RTC interru…

BACKGROUND The present disclosure relates to the handling of interrupts in a environment that utilizes virtual machines, and, more specifically, to the steering of interrupts between multiple logical processors running virtual machines. The virtualiz…

BACKGROUND OF THE INVENTION This relates to Input/Output (I/O) performance in a host system having multiple processors, and more particularly, to efficient usage of multiple processors in handling I/O completions by using interrupt affinity schemes t…