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…
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…
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…
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…
