MC100/Applications/foc/motor/current.c

#include <math.h>
#include "bsp/adc.h"
#include "bsp/pwm.h"
#include "foc/motor/current.h"
#include "libs/utils.h"
#include "libs/logger.h"

static current_samp_t g_cs;

#define NB_OFFSET_SAMPLES 32

#define Rvbus  0.0005f
#define Gvbus (13.1f) //母线电流的运放 
#define Rds_Defualt  0.005f//欧
#define Gmos  (1.7f)//mos 电流的运放
#define Sample_R Rds_Defualt
#define Lower_Pass_p 0.2f

#define VBUS_VOL(adc) (((float)(adc)) * 3.3f / 4096.0f / Gvbus)
#define MOSds_VOL(adc) (((float)(adc)) * 3.3f / 4096.0f / Gmos)

#define current_i(v, r) ((v)/(r))

void phase_current_init(void) {
	current_samp_t *cs = &g_cs;
	cs->offset_sample_count = NB_OFFSET_SAMPLES + 1;
	cs->adc_ia = 0;
	cs->adc_ib = 0;
	cs->adc_ic = 0;
}

void phase_current_calibrate(void){
	g_cs.adc_offset_a = 0;
	g_cs.adc_offset_b = 0;
	g_cs.adc_offset_c = 0;

	phase_current_init();
	g_cs.is_calibrating_offset = true;
	g_cs.sector = SECTOR_5;
	adc_current_sample_config(g_cs.sector);
	pwm_start();
	adc_start_convert();
	while(g_cs.offset_sample_count != 0){};

	adc_stop_convert();
	pwm_stop();
	task_udelay(100);
	phase_current_init();	
	g_cs.sector = SECTOR_1;
	adc_current_sample_config(g_cs.sector);
	pwm_start();
	adc_start_convert();
	while(g_cs.offset_sample_count != 0){};

	g_cs.is_calibrating_offset = false;
}


bool phase_current_offset(void) {
	current_samp_t *cs = &g_cs;
	if (!g_cs.is_calibrating_offset) {
		return false;
	}
	s32 phase_current1, phase_current2;
	adc_phase_current_read(cs->sector, &phase_current1, &phase_current2);
	if (cs->offset_sample_count == (NB_OFFSET_SAMPLES + 1)) {
		cs->offset_sample_count --;
		return true;
	}
	if (cs->offset_sample_count > 0) {
		cs->offset_sample_count--;
		if (cs->sector == SECTOR_5 && cs->offset_sample_count >= 0) {
			cs->adc_offset_b += phase_current1;
			cs->adc_offset_a += phase_current2;
			if (cs->offset_sample_count == 0) {
				cs->adc_offset_b = cs->adc_offset_b / NB_OFFSET_SAMPLES;
				cs->adc_offset_a = cs->adc_offset_a / NB_OFFSET_SAMPLES;
			}
		}
		if (cs->sector == SECTOR_1 && cs->offset_sample_count >= 0) {
			cs->adc_offset_c += phase_current2;
			if (cs->offset_sample_count == 0) {
				cs->adc_offset_c = cs->adc_offset_c / NB_OFFSET_SAMPLES;
			}
		}
	}
	return true;
}


#define LowPass_filter 1.0f
void phase_current_sample(s16 *ia, s16 *ib){
	current_samp_t *cs = &g_cs;
	s32 phase_current1, phase_current2;
	phase_time_t *time = &cs->time;
	adc_phase_current_read(cs->sector, &phase_current1, &phase_current2);
	if (time->three_shunts_flags == 1) {
		*ia = cs->adc_ia;
		*ib = cs->adc_ib;		
		time->three_shunts_flags = 0;
		return; //use old current;
	}
	if (cs->sector == SECTOR_4 || cs->sector == SECTOR_5) {
		/* Current on Phase C is not accessible */
		/* Ia = PhaseAOffset - ADC converted value) */
		cs->adc_ib = (phase_current1 - cs->adc_offset_b);
		cs->adc_ia = (phase_current2 - cs->adc_offset_a);
		cs->adc_ic = -(cs->adc_ia + cs->adc_ib);
	}else if (cs->sector == SECTOR_1 || cs->sector == SECTOR_6) {
		/* Current on Phase A is not accessible 	*/
		/* Ib = PhaseBOffset - ADC converted value) */
		cs->adc_ib = (phase_current1 - cs->adc_offset_b);
		cs->adc_ic = (phase_current2 - cs->adc_offset_c);
		cs->adc_ia = -(cs->adc_ib + cs->adc_ic);
	}else if (cs->sector == SECTOR_2 || cs->sector == SECTOR_3) {
		/* Current on Phase B is not accessible 	*/
		/* Ia = PhaseAOffset - ADC converted value) */
		cs->adc_ia = (phase_current1 - cs->adc_offset_a);
		cs->adc_ic = (phase_current2 - cs->adc_offset_c);
		cs->adc_ib = -(cs->adc_ia + cs->adc_ic);
	}
	*ia = cs->adc_ia;
	*ib = cs->adc_ib;
}


current_samp_t *get_phase_sample_point(u8 sector){
	current_samp_t *cs = &g_cs;
	phase_time_t *time = &cs->time;
	u32 low_side_low_duty = FOC_PWM_Half_Period - time->low;
	u32 low_side_mid_duty = FOC_PWM_Half_Period - time->midle;
	cs->sector = sector;
	time->Samp_p1 = FOC_PWM_Half_Period + 1;
	time->Samp_p2 = FOC_PWM_Half_Period + 1;
	/*底边开mos的时间是2倍的 low_side_low_duty(一个周期)*/
	if (low_side_low_duty * 2 >= TSampleMIN) { //可以采样
		if (low_side_low_duty >= (TADC + TDead)) {//可以在pwm的中心点采样
			time->Samp_p1 = FOC_PWM_Half_Period - 1;
			cs->sector = SECTOR_1;
		}else {
			u32 Samp_p = time->low + TSampleBefore;
			if (Samp_p >= FOC_PWM_Half_Period) { //需要在pwm中心点过后采样，需要配置PWM0模式
				time->Samp_p2 = ( 2u * FOC_PWM_Half_Period ) - Samp_p - (uint16_t) 1;
			}else {
				time->Samp_p1 = Samp_p;
			}
		}
	}else if (low_side_mid_duty * 2 >= TSampleMIN){
		if (low_side_mid_duty >= (TADC + TDead)) {//可以在pwm的中心点采样
			time->Samp_p1 = FOC_PWM_Half_Period - 1;
		}else {
			u32 Samp_p = time->midle + TSampleBefore;
			if (Samp_p >= FOC_PWM_Half_Period) { //需要在pwm中心点过后采样，需要配置PWM0模式
				time->Samp_p2 = ( 2u * FOC_PWM_Half_Period ) - Samp_p - (uint16_t) 1;
			}else {
				time->Samp_p1 = Samp_p;
			}
		}
	}else {
		time->three_shunts_flags = 1; //means do'nt use the sample current
		time->Samp_p1 = FOC_PWM_Half_Period - 1;//dumy trigger
	}
	return cs;
}


void phase_current_adc_triger(void){
	adc_enable_ext_trigger();
}