void TIMER0_IRQHandler (void) { if(LPC_TIM0->IR & 0x01) { LPC_GPIO1->FIOPIN ^= ( << ); LPC_TIM0->IR = 0x01; } } /* * CPU : LPC1769 * Operate Frequency : 120MHz * Timer Interrupt Example : * TCR : Counter Enable/Disable * PR : PreScale r…

An interrupt is an internal or external event that requires quick attention from the controller. The PIC32MZ architecture provides a rich interrupt system that can manage up to 190 sources of interrupts. Each interrupt source can have a unique piece…

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…

Interrupt zynq的中断. The PS is based on ARM architecture, utilizing two Cortex-A9 processors(CPUs) and the GIC pl390 interrupt controller. Each CPU has a set of private peripheral interrupts (PPIs). The PPIs include the global timer, private watchdog t…

Everything has its principles and mechanisms which are designed by its creator and followed by its users. Embedded Platform Architecture The key to understanding how the software interacts with the underlying platform devices is the system memory map…

The microcontroller is PIC32MZ2048ECH144 on the PIC32MZ EC Starter Kit. This microcontroller has four 32-bit synchronous timers are available by combining Timer2 with Timer3, Timer4 with Timer5, Timer6 with Timer7, and Timer8 with Timer9. The 32-bit…

专题文档汇总目录 Notes:ARM平台Clock/Timer架构:System counter.Timer以及两者之间关系:Per cpu timer通过CP15访问,System counter通过memory mapped IO访问:将System counter和Per cpu timer分别作为clocksource和clock event device注册到Linux时间子系统. 原文地址:Linux时间子系统之(十七):ARM generic timer驱动代码分析 一.前言 关注…

一.前言 关注ARM平台上timer driver(clocksource chip driver和clockevent chip driver)的驱动工程师应该会注意到timer硬件的演化过程.在单核时代,各个SOC vendor厂商购买ARM core的IP,然后自己设计SOC上的peripherals,这里面就包括了timer的硬件.由于没有统一的标准,各个厂商的设计各不相同,这给驱动工程师带来了工作量.然而,如果仅仅是工作量的话就还好,实际上,不仅仅如此.linux的时间子系统要求硬件t…

总结Zynq-7000 这款器件中的Timer定时器中断,为FreeRTOS中断做准备.在 ZYNQ 的纯 PS 里实现私有定时器中断. 每隔一秒中断一次, 在中断函数里计数加 1, 通过串口打印输出.  私有中断PPI包含: 全局定时器, 私有看门狗定时器, 私有定时器以及来自 PL 的 FIQ/IRQ. ZYNQ 每个 CPU 链接 5 个私有外设中断, 所有中断的触发类型都是固定不变的. 并且来自 PL 的快速中断信号 FIQ 和中断信号 IRQ 反向, 然后送到中断控制器.因此尽管在IC…

System.Timers.Timer可以实现数据库定时更新的功能 Global.asax void Application_Start(object sender, EventArgs e) { // 在应用程序启动时运行的代码 System.Timers.Timer timer = new System.Timers.Timer(1000); timer.Elapsed += new System.Timers.ElapsedEventHandler(AddCount); //AddCoun…