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…
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…
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…
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…
Hi guys,I am in need of your help, unfortunately STs documentation is lacking some information here. I am basically trying to implement a USB device (CDC-ACM to be precise) that utilizes suspend/wakeup. I am using the "STM32_USB-Host-Device_Lib_V2.1.…
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…
This 125 kHz RFID reader http://www.serasidis.gr/circuits/RFID_reader/125kHz_RFID_reader.htm http://www.serasidis.gr/circuits/RFID_reader/images/125kHz_RFID_reader_schem.GIF I will try to explain with simple words how the RFID works. The ATtiny13 use…
