Sat, 25 Apr 2020 20:31:31 +0200
Version 0.9.8. Added extra path to the fonts for Debian buster. Changed the PID to work on Proportional on Measurement. Added loops so that it looks like the PID is running at 100 mSec intervals.
#ifndef PID_H #define PID_H #define PID_MODE_NONE 0 /* Process control off */ #define PID_MODE_AUTO 1 /* Process control auto */ #define PID_MODE_BOO 2 /* Process control Bang On/Off */ #define PID_TYPE_HEAT 0 /* PID is used for heating */ #define PID_TYPE_COOL 1 /* PID is used for cooling */ typedef struct _pid_var { double iMax; /* Maximum allowable integrator state */ double iGain; /* Integral gain */ double pGain; /* Proportional gain */ double dGain; /* Derivative gain */ double idleRange; /* Idle range */ double Input; /* Input value */ double Err; /* Error, diff between input and set point */ double InputLast; /* Input from last pass */ double iState; /* Error from next last pass */ double SetP; /* Set point */ double OutP; /* Output of PID algorithm */ int Mode; /* Value is 'PID_AUTO' if loop is automatic */ int Type; /* Value is 'HEAT' or 'COOL' */ } pid_var; void InitPID( pid_var *, int); void UpdatePID( pid_var *); #endif