SPRACO5 September   2019 F29H850TU , F29H859TU-Q1 , TMS320F280021 , TMS320F280021-Q1 , TMS320F280023 , TMS320F280023-Q1 , TMS320F280023C , TMS320F280025 , TMS320F280025-Q1 , TMS320F280025C , TMS320F280025C-Q1 , TMS320F280040-Q1 , TMS320F280040C-Q1 , TMS320F280041 , TMS320F280041-Q1 , TMS320F280041C , TMS320F280041C-Q1 , TMS320F280045 , TMS320F280048-Q1 , TMS320F280048C-Q1 , TMS320F280049 , TMS320F280049-Q1 , TMS320F280049C , TMS320F280049C-Q1 , TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S , TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1

 

  1.   Leveraging High Resolution Capture (HRCAP) for Single Wire Data Transfer
    1.     Trademarks
    2. 1 Introduction
    3. 2 System Showcase
      1. 2.1 HRPWM: Encoding Unit
      2. 2.2 HRCAP: Decoding Unit
    4. 3 Software Flow
      1. 3.1 User Configurable Parameters
      2. 3.2 SFO Background Loop
      3. 3.3 Interrupt Based Encoding and Decoding
      4. 3.4 Offset Calibration
    5. 4 Experimental Setup and Results
    6. 5 Summary
    7. 6 References

3.4 Offset Calibration

As discussed in Section 2.2, the receiver decoded raw value has some fixed offset, thus one-time system calibration is required. Although not much variance values have been seen in the offset values from device-to-device, that is why a pre-calibrated offset value is already provided in the receiver code. But, in case you find some discrepancy in the performance with the pre-configured offset value, it is recommended to use the optional calibration code provided along with the device loopback example. Follow the calibration steps specified in the calibration_loopback.c to compute the offset value.