tec.h

DSP2812内部FLASH实时运行标准框架程序

/********************************************************************
* File: Tec.h                                                       *
* Description: This file contains C-language type definitions for   *
*   the C28x based TEC system.                                      *
* Author: David M. Alter                                            *
* History:                                                          *
*   10/30/02 - original (D. Alter)                                  *
********************************************************************/
#ifndef TEC_H
#define TEC_H


/*** Build options ***/
#define	FILTER			1				// 1=use low-pass filter, 0=no filter
#define	ADC_channel		0				// ADC channel used to read thermistor
										// A0 to A7 = ch. 0-7, B0 to B7 = ch. 8-15

/*** Constant Definitions ***/
#define			Q				32768	// I1Q15 fraction scaling value
#define			NLP				5		// low-pass filter tap length
#define			PWM_period		1023	// 1023 = 146kHz asym PWM @ 150MHz HSCLK
#define			sample_period	5999	// 5999 = 195.3Hz, in sync with PWM clock with /128
#define			ACTRA_pos_mask	0x0001	// ACTRA mask for positive u
#define			ACTRA_neg_mask	0x0004	// ACTRA mask for negative u
#define			VREF			2.0		// Reference voltage for PID loop

/*** Typedefs ***/
typedef struct {
	float32 r;							// r(k), reference value
	float32 u;							// u(k), total control signal
	float32 e1;							// e(k-1), previous error signal
	float32 yf;							// yf(k), filtered plant output
	float32 ui1;						// ui(k-1), previous I-mode control signal
	float32 u_max;						// total control limit
	float32 ui_max;						// I-mode control limit
	float32 Kp;							// P-control gain
	float32 Ki;							// I-control gain
	float32 Kd;							// D-control gain
	int16 y;							// y(k), plant output, I1Q15
	int16 y1;							// y(k-1), previous plant output, I1Q15
	int16 y2;							// y(k-2), previous plant output, I1Q15
	int16 y3;							// y(k-3), previous plant output, I1Q15
	int16 y4;							// y(k-4), previous plant output, I1Q15
  } PID;


/*** Global Variable extern declarations ***/
extern PID		TEC1;					// the TEC system
extern int16	aLP[NLP];				// low-pass filter coefficients


#endif

/*** end of file *****************************************************/