SBOU309 august   2023 INA220

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Quick Start Setup
    2. 2.2 EVM Operation
      1. 2.2.1 Current Sensing Operation
        1. 2.2.1.1 Detailed Setup
    3. 2.3 Circuitry
      1. 2.3.1 Current Sensing IC
      2. 2.3.2 Input Signal Path
      3. 2.3.3 Digital Circuitry
    4. 2.4 PAMB Compatibility
  8. 3Software
    1. 3.1 Setup
      1. 3.1.1 Driver Installation
      2. 3.1.2 Firmware
        1. 3.1.2.1 Firmware Debug
      3. 3.1.3 GUI Setup and Connection
        1. 3.1.3.1 Initial Setup
        2. 3.1.3.2 GUI to EVM Connection
    2. 3.2 GUI Operation
      1. 3.2.1 Home Tab
      2. 3.2.2 Configuration Tab
      3. 3.2.3 Registers Tab
      4. 3.2.4 Results Data Tab
    3. 3.3 Direct EVM USB Communication
      1. 3.3.1 Standard USB Read and Write Operations
      2. 3.3.2 Collect Data Through the USB BULK Channel
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Related Documentation

3.3.1 Standard USB Read and Write Operations

Use the serial COM port to read and write registers through USB commands using the following format:

  • Set device address format: setdevice DEVID
    • Where setdevice is always lower case, and DEVID is defined as:
      • The 4 LSBs of the address in decimal format. Ex, for an address of 0x4A, use 10.
    • Note, when the SCB is reset while one or more EVMs are connected, the address defaults to the lowest address found.
      • The SCB checks for I2C or SPI at start up. If no device is attached, then the device defaults to SPI. Reset the SCB with an I2C EVM connected to use I2C.
    • For example, to set the INA220 with a register address of 0x4A, send the command: setdevice 10.
    • For this example, the EVM returns the acknowledgment and state ("idle" or "collecting") in JSON format:
      • {"acknowledge":"setdevice 10"}
      • {"evm_state":"idle"}
  • Read register format: rreg ADR
    • Where ADR is the address in hex, and rreg is always lower case.
    • Register addresses can be in upper or lower case, and do not need to be led by '0x'. 0 padding register addresses is also optional. For example, to read register address 0x02, some valid commands include:
      • rreg 2
      • rreg 0002
      • rreg 0x02
        • When '0x' is used, the 'x' must be lower case.
    • For this example, the EVM returns the results and state ("idle" or "collecting") in JSON format:
      • {"acknowledge":"rreg 0x02"}
      • {"register":{"address":2,"value":6626}}
      • {"evm_state":"idle"}
  • Write register format: wreg ADR VAL
    • Where ADR and VAL are in hex, and wreg is always lower case.
    • Register addresses and values can be in upper or lower case, and do not need to be led by '0x'. 0 padding register addresses and values is also optional. For example, to write register address 0x0 with the value 0x3ccf, some valid commands include:
      • wreg 0 3ccf
      • wreg 00 0x3ccf
      • wreg 0x00 0x3CCF
        • When '0x' is used, the 'x' must be lower case.
    • For this example, the EVM returns the results and state ("idle" or "collecting") in JSON format:
      • {"acknowledge":"wreg 0x00 0x4ccf"}
      • {"console":"Writing 0x3ccf to CONFIGURATION register"}
      • {"evm_state":"idle"}