SysTick-based timestamp system with button event counting and low-power sleep mode.
Millisecond precision • Hybrid debounce • SEGGER RTT debugging
A real-time timestamp and event counter system using the ARM Cortex-M3 SysTick timer. Generates timestamps, counts button presses within a 10-second window, and operates in low-power sleep mode between interrupts.
| Feature | Description |
|---|---|
| ⏱️ Timestamps | 1-second precision (HH:MM:SS format) |
| 🔘 Button Counter | Tracks presses in 10-second windows |
| 💡 LED Toggle | Visual feedback on button press |
| 🔇 Hybrid Debounce | Hardware + software flag protection |
| 😴 Low-Power Sleep | Idle between interrupts |
| 🔌 RTT Debug | SEGGER RTT output (no UART needed) |
| Component | Pin | Function |
|---|---|---|
| Button SW2 | DIO5 | Input trigger |
| LED | DIO6 | Status output |
| Debugger | - | J-Link |
[TIMESTAMP] 00:55:45 - LED OFF
[CONTADOR] Button: 15 times in last 10 sec
[GPIO] Button pressed! Total: 16 (timestamp: 3348 sec)
[GPIO] Button pressed! Total: 17 (timestamp: 3348 sec)
[TIMESTAMP] 00:55:50 - LED ON
[CONTADOR] Button: 18 times in last 10 sec
git clone https://github.com/surbalo1/RSL10-SysTick-Timestamp.git
cd RSL10-SysTick-Timestamp
# Import in onsemi IDE → Build → Flash
# Open SEGGER RTT Viewer to monitor| Component | Details |
|---|---|
| SysTick | 1ms tick → rtc_seconds every 1000 ticks |
| DIO0_IRQHandler | Button interrupt with debounce flag |
| RTC_PrintTimestamp() | Prints time every 5 seconds |
MIT License
