bms/Application/bsp/ml5238.c

#include <string.h>
#include "libs/shark_libs.h"
#include "spi.h"
#include "ml5238.h"

static shark_timer_t irq_task;


static int ml5238_read(uint8_t regaddr, uint8_t *data);
static void ml5238_clear_bits(uint8_t regaddr, uint8_t bit);
static void ml5238_set_bits(uint8_t regaddr, uint8_t bit);

static void irq_hander_in_timer(shark_timer_t *timer);
static ml5238_notify_hander _handler;
void ml5238_init(void){
	spi0_init();
	ml5238_softreset();
	irq_task.handler = irq_hander_in_timer;
}

void ml5238_register_notify_handler(ml5238_notify_hander handler){
	_handler = handler;
}


//used to detect charger over current
int ml5238_charger_is_disconnect(void){
	uint8_t value = 0;
	uint8_t fet = 0;
	ml5238_read(ML5238_FET, &fet);	
	ml5238_read(ML5238_PSENSE, &value);
	if (fet & FET_DF){
		return (value & PSENSE_PSH);
	}
	return (value & PSENSE_PSL);
}

int ml5238_enable_load_detect(int enable){

	ml5238_clear_bits(ML5238_RSENSE, RSENSE_RRS);
	if (enable){
		ml5238_set_bits(ML5238_RSENSE, RSENSE_ERS);
	}else {
		ml5238_clear_bits(ML5238_RSENSE, RSENSE_ERS | RSENSE_IRS);
	}
	return 0;
}

int ml5238_is_load_disconnect(void){
	uint8_t value = 0;
	ml5238_read(ML5238_RSENSE, &value);
	return (value & RSENSE_RS);
}

#define IRS_IRQ 1 //load disconnectÖжÏ
#define IPSL_IRQ 2 //charger over current
#define ICS_IRQ 3 //¶Ì·ÖжÏ

int ml5238_enable_irq(int enable, int irq){
	if (irq == IRS_IRQ){
		ml5238_clear_bits(ML5238_RSENSE, RSENSE_RRS);
		if (enable){
			ml5238_set_bits(ML5238_RSENSE, RSENSE_IRS);
		}else {
			ml5238_clear_bits(ML5238_RSENSE, RSENSE_IRS);
		}
	}
	if (irq == IPSL_IRQ){
		ml5238_clear_bits(ML5238_PSENSE, PSENSE_RPSL);
		if (enable){
			ml5238_set_bits(ML5238_PSENSE, PSENSE_IPSL);
		}else {
			ml5238_clear_bits(ML5238_PSENSE, PSENSE_IPSL);
		}
	}
	if (irq == ICS_IRQ){
		ml5238_clear_bits(ML5238_RSENSE, RSENSE_RSC);
		if (enable){
			ml5238_set_bits(ML5238_RSENSE, RSENSE_ISC);
		}else {
			ml5238_clear_bits(ML5238_RSENSE, RSENSE_ISC);
		}
	}
	return 0;
}

int ml5238_enable_charger_detect(int enable){
	uint8_t fet = 0;
	ml5238_read(ML5238_FET, &fet);
	if (fet & FET_DF){ //discharger is on, used to detect charger over current
		ml5238_clear_bits(ML5238_PSENSE, PSENSE_RPSL);
		if (enable){
			ml5238_set_bits(ML5238_PSENSE, PSENSE_EPSL);
		}else {
			ml5238_clear_bits(ML5238_PSENSE, PSENSE_EPSL);
		}
	}else { //discharger if off, used when powerdown, charger is insert
		ml5238_clear_bits(ML5238_PSENSE, PSENSE_RPSH);
		if (enable){
			ml5238_set_bits(ML5238_PSENSE, PSENSE_EPSH);
		}else {
			ml5238_clear_bits(ML5238_PSENSE, PSENSE_EPSH);
		}
	}
	return 0;
}

static int __inline__ _charger_mosfet_is_open(void){
	uint8_t data;
	ml5238_read(ML5238_FET, &data);
	return (data & FET_CF) != 0;
}

static int __inline__ _discharger_mosfet_is_open(void){
	uint8_t data;
	ml5238_read(ML5238_FET, &data);
	return (data & FET_DF) != 0;
}

int ml5238_is_charging(void){
	return _charger_mosfet_is_open();
}

int ml5238_is_discharging(void){
	return _discharger_mosfet_is_open();
}

void ml5238_cell_start_balance(uint16_t balance_mask){
	ml5238_write(ML5238_CBALH, (balance_mask >> 8) & 0xFF);
	ml5238_write(ML5238_CBALL, balance_mask & 0xFF);
}



int ml5238_enable_discharger_mosfet(int enable){
	uint8_t data;
	if (ml5238_read(ML5238_FET, &data) == 0){
		if ((data & FET_DF) == enable){
			return 0; //alread enable/disabled
		}
		data &= ~(FET_DF);
		if (enable){
			data |= (FET_DF | FET_DRV);
		}else {
			if ((data & FET_CF) == 0){
				data &= ~(FET_DRV);
			}
		}
		return ml5238_write(ML5238_FET, data);
	}
	return -1;
}

/* when enable charger the discharger mosfet also must be enabled for charging */
int ml5238_enable_charger_mosfet(int enable){
	uint8_t data;
	if (ml5238_read(ML5238_FET, &data) == 0){
		if (((data & FET_CF) >> 1) == enable){
			return 0; //alread enable/disabled
		}
		data &= ~(FET_CF);
		if (enable){
			data |= (FET_CF | FET_DRV);
		}else {
			if ((data & FET_DF) == 0){
				data &= ~(FET_DRV);
			}
		}
		return ml5238_write(ML5238_FET, data);
	}
	return -1;
}


int ml5238_short_current_detect(int mode){
	uint8_t rsense = 0;
	if (mode >= SHORT_CURRENT_MODE_50A_100A){
		if (ml5238_read(ML5238_RSENSE, &rsense) == 0){
			if (ml5238_write(ML5238_SETSC, mode) == 0){
				if (rsense & (RSENSE_ESC | RSENSE_ISC)){
					return 0; //already enabled short current detect
				}
				rsense |= (RSENSE_ESC | RSENSE_ISC);//enable short current detect && irq
				rsense &= ~RSENSE_RSC;
				return ml5238_write(ML5238_SETSC, rsense);
			}
		}
	}else {
		if (ml5238_read(ML5238_RSENSE, &rsense) == 0){
			if ((rsense & RSENSE_ESC) == 0){
				return 0; //already disabled 
			}
			rsense &= ~(RSENSE_ESC|RSENSE_ISC|RSENSE_RSC);
			return ml5238_write(ML5238_SETSC, rsense);
		}
	}
	return -1;
}

void ml5238_softreset(void)
{
	unsigned char i;
	
	for(i=0u;i<0x0Au;i++)
	{
		ml5238_write((uint8_t)(ML5238_VMON + i), 0x00u);	
	}
}

void ml5238_power_down(void){
	do {
		ml5238_write(ML5238_PSENSE, PSENSE_EPSH|PSENSE_IPSH); //before power down, we must enable charger detect
		ml5238_write(ML5238_POWER, POWER_PDWN);
	}while(1);
}

void ml5238_power_save(int save){
	ml5238_write(ML5238_PSENSE, PSENSE_EPSH|PSENSE_IPSH);
	if (save) {
		ml5238_write(ML5238_POWER, POWER_PSV);
		ml5238_irq_enable(1);  //enable charger detect irq, to wakeup bms when charger insert
	}else {
		ml5238_write(ML5238_POWER, 0);
	}
}

static void __inline__ call_handler(int event){
	if (_handler) {
		_handler(event);
	}
}

static void irq_hander_in_timer(shark_timer_t *timer){
	uint8_t status = 0;
	ml5238_read(ML5238_STATUS, &status);
	if (status & STATUS_RPSL){//chargering over current
		ml5238_enable_charger_detect(0);
		call_handler(ML5238_Event_Charger_Over_Current);
	}
	if (status & STATUS_RSC) { //short current detect, close charger/discharger mosfet
		if (_charger_mosfet_is_open()) {
			ml5238_enable_charger_mosfet(0);
		}
		if (_discharger_mosfet_is_open()) {
			ml5238_enable_discharger_mosfet(0);
		}
		ml5238_enable_irq(0, ICS_IRQ); //disable short current detect
		call_handler(ML5238_Event_Short_Current);
	}
	if (status & STATUS_RRS) {//load disconnect, if short detect, we must wait load disconnected, and then can open discharger
		ml5238_enable_irq(0, IRS_IRQ);
		call_handler(ML5238_Event_Load_Disconnect);
	}
}

void ml5238_irq_handler(void){
	shark_timer_post(&irq_task, 0);
}

static void ml5238_set_bits(uint8_t regaddr, uint8_t bit) {
	uint8_t value;
	ml5238_read(regaddr, &value);
	ml5238_write(regaddr, value|bit);
}

static void ml5238_clear_bits(uint8_t regaddr, uint8_t bit) {
	uint8_t value;
	ml5238_read(regaddr, &value);
	ml5238_write(regaddr, value&(~bit));
}


int ml5238_write(uint8_t regaddr, uint8_t data){
	uint16_t send_data=(((uint16_t)regaddr)<<(0x09))|((uint16_t)data);
	ml5238_cs(0);
	int ret = spi0_send_uint16(send_data, NULL);
	ml5238_cs(1);
	return ret;
}

static int ml5238_read(uint8_t regaddr, uint8_t *data){
	uint16_t send_data=((((uint16_t)regaddr)<<(0x09))|0x0100u)|((uint16_t)0x00u);
	ml5238_cs(0);
	int ret = spi0_send_uint16(send_data, data);
	ml5238_cs(1);
	return ret;
}