BLE Voice

When developing Bluetooth smart speakers based on Jieli's AC696N series of SoCs, paying attention to certain hardware and software details can significantly improve development efficiency and system stability. This article summarizes several key points, including RTC power supply, register debugging, AAC format support, and DAC fade-in settings. 1. Developing with RTC Functionality Note: The RTCVDD pin must be powered by an external power source , such as a button cell battery or IOVDD. Do not leave it floating or connect it to an inappropriate voltage rail. 2. Chip-Related Register Printing ADDA Register Value Printing The following functions can be used to dump the current state of the Audio DAC/ADC registers, which is invaluable for debugging audio issues. · Print all DAC and ADC registers: void audio_adda_dump(void) { printf("DAC_VL0:%x", JL_AUDIO->DAC_VL0); printf("DAC_TM0:%x", JL_AUDIO->DAC_TM0); printf("DAC_DTB:%x", JL_AUDIO-...

  Introduction: Protecting Health Starts with Audible Air Safety "Clothing, food, shelter, and transportation" - the safety of our living environment is paramount. In modern life, with new home renovations and new furniture, formaldehyde and other harmful gases become hidden health threats. National standar ds stipulate that indoor formaldehyde concentrations exceeding 0.08mg/m³ are considered excessive, and long-term exposure to excessive environments can severely impact the respiratory system and even cause serious diseases. Traditional detectors often rely solely on beeping sounds or screen readings, with information transmission not being intuitive enough, especially with limited effectiveness during emergencies. How can we make air detection more humane, more a udible, and easier to understand? The KT148A voice chip , with its high sound quality, strong drive capability, low power consumption, and flexible control, provides a complete voice prompt and interaction solutio...