TIDUE73A April   2018  – November 2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1 C2000 Real-Time MCU LaunchPad
      2. 2.2.2 SN65HVD78
      3. 2.2.3 TLV702
      4. 2.2.4 TPS22918-Q1
    3. 2.3 Design Considerations
      1. 2.3.1 BiSS-C Protocol
        1. 2.3.1.1 Line Delay Compensation
        2. 2.3.1.2 Processing Time Request by Encoder
        3. 2.3.1.3 Control Communication
      2. 2.3.2 C2000 BiSS-C Encoder Interface Overview
      3. 2.3.3 TIDM-1010 Board Implementation
      4. 2.3.4 MCU Resource Requirements
        1. 2.3.4.1 Input, Output Signals, and CLB Tiles
      5. 2.3.5 CLB BiSS-C Implementation Details
        1. 2.3.5.1 Transaction Waveforms
        2. 2.3.5.2 FRAME_STATE Generation
        3. 2.3.5.3 CLB_SPI_CLOCK Generation
        4. 2.3.5.4 ENCODER_CLOCK (MA) Generation
      6. 2.3.6 PM BiSS-C Interface Library
        1. 2.3.6.1 PM BiSS-C Library Functions
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware
      1. 3.1.1 TIDM-1010 Jumper Configuration
    2. 3.2 Software
      1. 3.2.1 C2000 Driver Library (DriverLib)
      2. 3.2.2 C2000 SysConfig
      3. 3.2.3 C2000 Configurable Logic Block Tool
      4. 3.2.4 Installing Code Composer Studio™ and C2000WARE-MOTORCONTROL-SDK
      5. 3.2.5 Locating the Reference Software
    3. 3.3 Testing and Results
      1. 3.3.1 Hardware Configuration
      2. 3.3.2 Building and Loading Project
      3. 3.3.3 Running Example Code
      4. 3.3.4 Encoder Test
      5. 3.3.5 Benchmarks
      6. 3.3.6 Troubleshooting
  10. 4Design Files
  11. 5Software Files
  12. 6Related Documentation
    1.     Trademarks
  13. 7Terminology
  14. 8About the Authors
  15. 9Revision History

2 System Overview

The C2000 BiSS TIDM-1010 reference design is a combination of hardware and software. The core hardware components are a C2000 real-time microcontroller (MCU) and a RS-485 transceiver. The C2000 LaunchPad and the TIDM-1010 boosterPack, which contains the RS-485 transceiver, are the boards used in this implementation. The C2000Ware Motor Control SDK package contains the necessary software. The software includes a library, which implements key BiSS interface features, along with a system-level example to demonstrate BiSS-C communication.

The BiSS encoder interface leverages the C2000 CLB (Configurable Logic Block) and the SPI (Serial Peripheral Interface) modules. The CLB controls the MA clock, SPI clock, and compensates for cable propagation delay. The SPI module acts as the receive interface to the RS-485 physical layer. The firmware, which is written in C, runs on the C28x of the C2000 MCU.

The C2000 LaunchPad can provide power for the TIDM-1010 RS-485 transceiver and 5V for the encoder. 5V can also be supplied separately if the encoder specifications require a higher current than the LaunchPad can provide.

During start-up, the application running on the C28x initializes the MCU clocks and configures the pin-mux. The MCU's SPI and CLB are also configured as required to send and receive data.