A simple test of the real-time performance of the Luckfox Lyra RK3506.
Testing shows that the RK3506 running a Buildroot Linux system can achieve delays of around 5 µs RMS and 40 µs maximum with minimal real-time optimization.
The oscillogram below shows the signal on the GPIO0_A2_D pin. The gray area represents infinite persistence over a 15-minute recording period. It is important to note that ADB debugging via USB and the top tool were running concurrently with the signal generator during this test.
