Microchip Technology Digital Power Starter Kit User Manual page 28

Digital Power Starter Kit User's Guide
FIGURE 3-1:
Soft Start Routine
Soft Start
Routine
DS52078A-page 28
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SMPS DEMONSTRATION PROGRAM FLOW CHART
Start
Initialization Routines:
• Peripherals – ADC, PWM, Timers, GPIO,
LCD, etc.
• Variables – PID Gain Terms, Data Buffers
• Interrupts – ADC, Timers
• Set Soft Start Flag
Does Fault
Condition Exist?
No
Yes
Is Soft
Start Active?
No
Idle Loop Functions:
• Check V
IN
• Check Soft Start Flag
• Check/Reset Fault Timers and Flag
• Measure Temperature and Potentiometer's Position
• Update LCD Display Information
• Perform Non-Critical Functions (i.e., user application
tasks)
Fault Check Routine
Yes
Disable
Outputs
ADC Interrupt Routines:
• Measure V
• Calculate PID Gain Parameters
• Update PWM Duty Cycle
ADC Interrupt
OUT
End
 2012 Microchip Technology Inc.