This demo leverages 12-bit DAC at 1MSPS with DMA to output a 1kHz sine wave on PA15. Simultaneously, ADC samples the signal via ADC1 CH1 on PA16 using synchronized DMA storage into a 1000-element array. Data exported via UART is reconstructed in Excel for waveform fidelity analysis, such as THD showcasing closed-loop signal chain validation without CPU intervention.