AN 761: Board Management Controller

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ID 683850
Date 6/29/2022
Public
Document Table of Contents
Document Table of Contents x
Product Discontinuance Notification AN 761: Board Management Controller
AN 761: Board Management Controller x
Design Example Description Requirements Design Example Walkthrough Concept Document Revision History for AN 761: Board Management Controller
Design Example Description x
Supported Features
Requirements x
Hardware Requirements Software Requirements
Hardware Requirements x
System Requirements External Hardware Requirement Power Module Grouping Pin Assignments and Description
Software Requirements x
Other Software
Design Example Walkthrough x
Hardware Setup Instructions Running the Design Example Supported Commands Customizing the Design Example
Hardware Setup Instructions x
Intel® MAX® 10 Development Kit Custom Fan Board ED810X+FDMF5820 Kit Connection Diagram for the Board Management Controller
Concept x
Design in the Intel® MAX® 10 Device Software Implementation
Product Discontinuance Notification
AN 761: Board Management Controller

Software Implementation

Figure 18. Board Management Controller Software Flow

The following is the flow of the design example:

  • During system start up
    • Initialize system variable
    • Initialize peripheral (ADC, power module, system fan, UFM, timer, and watchdog timer)
      • ADC
        • Reset to stop the ADC sample
      • Power module
        • Set the I2C frequency to 400 KHz
        • Enable the On/Off control of the power module through PMBus
        • Turn off all power module
        • Turn off the LED indicator on the development kit
      • System fan
        • Set the fan speed to medium (50% duty cycle)
      • UFM
        • Read the last UFM address data is 0xE0000000
        • If true, the UFM content is not erased
        • If false, the UFM content will be erased
        • When the UFM is clear, it will be showing the full LED indicator
      • Timer
        • Enable timer for the voltage and temperature monitor
      • Watchdog timer
        • The watchdog timer resets the board management controller if it is not responding after 10 seconds during power up or power down
    • Initialize system interrupt
      • Enable interrupt for the PMBus ALRT line
      • Enable interrupt for the button action
      • Enable interrupt for the timer
      • Enable interrupt for the UART receive
  • After the completion of all initialization
    • Board management controller turn on the power supplies by power group
      • Preset voltage for each group:
        • Group 1 at 0.9 V
        • Group 2 at 1.0 V
        • Group 3 at 1.2 V
      • Power-up sequence based on the Intel® Stratix® 10 FPGA—Group 1 to Group 2 to Group 3
      • Power-down sequence based on the Intel® Stratix® 10 FPGA—Group 3 to Group 2 to Group 1
    • Four waiting input:
      • Wait for the press button
        • Once press button, check if the flag for all power modules is turn on or turn off
        • If turn off, proceed to power up the power modules using the power-up sequence
        • If turn on, proceed to shut down the power modules using the power-down sequence
      • Wait for the timer to trigger voltage and temperature measurement
        • Upon reaching the five seconds interval, the board management controller triggers the ADC to check the temperature of the Group 1, Group 2, and Group 3 voltage regulators and the Intel® MAX® 10 FPGA
        • Voltage
          • Review all three modules to ensure there is no voltage supply that violates the preset voltage
          • Any violation of the preset voltage will have data log into the UFM
        • Temperature
          • Any violation of the preset temperature will have data log into the UFM
            • High temperature preset—50°C
            • Low temperature preset—20°C
          • System fan
            • Fan with PWM duty cycle of 100% if high temperature is detected (50°C)
            • Fan with PWM duty cycle of 30% if low temperature is detected (20°C)
            • By default, fan with PWM duty cycle of 50%
      • Wait for the user input from the USB
        • Preset commands in the firmware—read voltage, set timer, read UFM, delete UFM, and preset threshold voltage
        • Each command has an integrated function
      • Watchdog timer check
Level Two Title