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QWhy does the device fail to communicate properly after power-on?A
Host MCU UART Communication Troubleshooting Flow
• UART Communication Checklist
1. Verify TX Output: Disconnect the physical connection between the Host MCU and the sensor. Using a logic analyzer, verify that the data write interface (as specified in Section 2.4 of the MRS2xx mmWare Radar Sensor Host Development Manual) outputs the expected data of LEN length at the correct baud rate.
2. After confirming the data in Step 1 is correct, connect the Host MCU TX pin to the sensor RX pin. Have the Host MCU continuously send 0x7E. Use a logic analyzer to monitor whether the sensor TX pin outputs 0x79.
3. Fully connect the Host MCU and the sensor (Host MCU RX pin to sensor TX pin). Use a logic analyzer to simultaneously monitor the system communication pins to verify if the Host MCU RX pin receives 0x79 after the Host MCU TX pin outputs 0x7E.
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QCommon Issues During Driver Integration.A
Please ensure that developers have completed the checks outlined in Section 6.1 of the MRS2xx mmWave Radar Sensor Host Development Manual to guarantee proper communication.
• Sync Timeout During Firmware Download.
• Failure at the Last Packet During Firmware Download.
• Unsupported Error Codes or Checksum Errors During Firmware Download.
• Sensor Fails to Start/Stop After a Successful Firmware Download.
• Considerations for Software I²C.
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QCommon Issues in Host MCU Development.A
Dynamic Parameter Configuration
The HOST_DRIVER maintains a parameter configuration structure that maps directly to the parameter types available in the GUI tool. Developers can achieve dynamic parameter configuration at runtime by modifying the members of this structure.
Assuming you need to modify the Detection Sensitivity parameter, follow these specific steps:
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QHow to use the Adaptive Environment Learning feature (Mode 3)?A
• Prerequisites
When using adaptive learning, the device must operate exclusively in single Mode 3, and the environment must be unoccupied. The specific processing flow for environment learning is: Host MCU Acquires Spectrum -> Parses Spectrum -> Updates Threshold -> Dispatches Threshold.
• Spectrum Acquisition
Method 1: Actively acquire the spectrum using the 0x61 command (Recommended, supports UART/I2C).
Method 2: Acquire the spectrum via TLV configuration for active reporting (Supports UART only).
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QHow to achieve continuous radar data acquisition in the HOST_DRIVER consistent with the GUI interface?A
· HOST_DRIVER: Utilizes the DOUT state mode. At the application level, the sensor target data is read only when the DOUT state toggles.
· GUI: Utilizes thread polling for data reading, so the tool continuously refreshes the distance;
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