When Soldering Doesn't Fix It: Swap the MCU
The article discusses a hardware debugging technique that involves swapping the microcontroller unit (MCU) to resolve persistent issues with an I2C bus. After extensive troubleshooting, the author discovered that moving the peripheral to a different MCU allowed the system to function correctly. This experience highlighted the importance of considering MCU portability as a diagnostic tool in embedded systems.
- ▪The author faced a persistent issue with an I2C bus that refused to acknowledge devices despite thorough troubleshooting.
- ▪After swapping the peripheral to a different MCU, the system successfully detected devices, revealing a defect in the original MCU's GPIOs.
- ▪The experience emphasized the value of using portable firmware as a diagnostic tool in hardware debugging.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3871018) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Aliaksandr Liapin Posted on May 29 When Soldering Doesn't Fix It: Swap the MCU #embedded #zephyr #iot #debugging A hardware-debugging technique that uses your portable firmware codebase as the diagnostic tool. Plus the deeper bug it exposed once I got past the hardware wall. I spent a week chasing an I2C bus that refused to ACK. By the end of it, I had soldered the breakout, replaced every jumper, swapped chips, and verified every pin assignment three times.
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at DEV.to (Top).
Discussion
0 commentsMore from DEV.to (Top)
