#ifndef _PROVALCTRL_H_
#define _PROVALCTRL_H_

extern float ao_dwq;		//AO输出电流值(定位器)
extern float ao_blf1;		//AO输出电流值(比例阀)
extern float ao_blf2;		//AO输出电流值(比例阀)

typedef struct
{
	float current_pressure;
	float current_percent;
	float target_pressure;
	float target_percent;
	float current_input;
	float input_max;	
	float input_min;
	float bias;	
	float bias_previous;
	float bias_area;						//bias permitted [-a, a]%
	
	float Kp;										//used for pid control
	float Ti;
	float Ing;
	float Ing_max;
	float Ing_min;
	float Td;
	float pidout;
	float pidout_max;
	float pidout_min;
	
	float cstep_gasin;    			// tinny step adjust
	float cstep_gasout;  
	float cstep_max;
	float cstep_min;
	unsigned char cstep_wait;
	
	void (*pvout)(float pout);	//dac out
}propotion_valve;							//propotion valve

extern propotion_valve pv_one;
extern propotion_valve pv_two;

void prov_init(void);
void prov_ctrl(float target_p, propotion_valve *pvx);
void prov_calibrate_pid(propotion_valve *pvx);
void prov_calibrate_step(propotion_valve *pvx);
void analog_ctrl(void);
float abs_bias(float bias);

#define CSTEP_WAIT_MAX 0
#define BIAS_MAX 10

#endif