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…
In my previous blog "PIC32MZ tutorial -- Output Compare", I shows how to apply Output Compare without interrupt to generate PWM signal. I also tried the Output Compare interrupt. I selected OC to be PWM mode without fault pin (OCM = "110&qu…
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…
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…
Output Compare is a powerful feature of embedded world. The PIC32 Output Compare module compares the values stored in the OCxR and/or the OCxRS registers to the value in the selected timer. When a match occurs, the Output Compare module generates an…
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…
Today I accomplish a simple application for PIC32MZ EC Starter Kit. This application uses Input Capture feature of PIC32MZ. The Input Capture module captures the 32-bit value of the selected Time Base registers when an event occurs at the ICx pin. T…
In my last post I implement "Key Debounce" with port polling, port polling is not very efficient. And this time, I will use change notification instead of port polling. It generates interrupt and starts debounce when the level of digital port ch…
Today I accomplish a application on PIC32MZ EC Starter Kit. The feature of application is to light up LED when key released and put out LED when key pressed. LED is the Starter Kit LED1 connecting to RH0. Key is the Starter Kit push button SW1 conne…
Today I implement "Hello World" on PIC32MZ EC starter kit. The application of "Hello World" only lights up a LED. There are three LEDs on the starter kit board -- LED1 and LED2 and LED3. At the moment, I only light LED1 on RH0. Every…
At this moment, I accomplish the interface of UART communication for PIC32MZ EC Starter Kit. This interface configures the PIC32MZ for communication with a host PC at 115200 baud. There are five functions in the interface -- Uart_Init(), Uart_Getc(),…
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…
Watchdog is a very necessary module for embedded system. Someone said that embedded system operates without watchdog enabled just like the car without air bag. You should always enabled watchdog as possible as you can. The PIC32MZ Watchdog Timer (WDT…
Today I finish the "Blinky LED" application on PIC32MZ starter kit. This application let LED1 blink with 0.5HZ frequency. The pseudo code is like LOOP: LED ON Delay second LED OFF Delay second It uses Timer1 to control the delay time. So first I…
Core Timer is a very popular feature of PIC32 since it is a piece of the MIPS M4K core itself and is common to all MIPS processors. Most RTOS's timer are based on core timer. This timer has a fixed prescaler 1:2, and it is a 32-bit timer, no need to…
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…
Detailed Description This module implements the Battery Service with the Battery Level characteristic. During initialization it adds the Battery Service and Battery Level characteristic to the BLE stack database. Optionally随意地 it can also add a Repor…
Processor operations mostly involve processing data. This data can be stored in memory and accessed from thereon. However, reading data from and storing data into memory slows down the processor, as it involves complicated processes of sending the da…
