Configuring Interrupt Priority Groups and Preemption on STM32F1 Microcontrollers
Overview of STM32F1 Interrupt Architecture
The STM32F1 series, built on the ARM Cortex-M3 core, supports a significant number of interrupts. While the Cortex-M3 architecture theoretically supports 240 external interrupts, the STM32F103 line simplifies this by implementing 60 maskable interrupts alongside 16 internal exceptions. These interrupts ...
Posted on Mon, 29 Jun 2026 16:41:11 +0000 by x_filed2k
Implementing External Interrupts (EXTI) on STM32 with Standard Peripheral Library
External interrupts allow a microcontroller to respond immediately too external events by pausing its current program execution, handling the interrupt request, and then resuming normal operation. The STM32 EXTI controller manages up to 20 interrupt/event lines, with GPIO pins 0-15 connected to EXTI lines 0-15. Additional lines serve specific p ...
Posted on Thu, 11 Jun 2026 17:08:35 +0000 by developerdave