BQ79600-Q1: BMS FAULT STATUS TO BRIDGE DEVICE

Hi Benjamin,

If I leave NFAULT PIN as a floating in the stack device, does my stack device transmit a fault signal to the base device when I set  DEV_CONF[FCOMM_EN] to 1

(2) NFAULT signal will be propagated automatically down the daisy chain using COML/H, does NFAULT pin of bridge device is automatically low in response of NFAULT signal.

Thanks

Hi Benjamin,

When I enable TSREF than auto addressing not work properly 

Below snap is the DIR0_ADDR value of 4 stack device and 1 base device after enable TSREF

Below snap is the DIR0_ADDR value of 4 stack device and 1 base device when TSREF is disable.

Hi Benjamin,

Thanks for reply and I was on vacation so I couldn't reply to you.

 I did everything you suggested but the problem is not solved as I turn on the TSREF than i facing the same problem as earlier 

Auto addressing not work properly

Below snap is the DIR0_ADDR value of 4 stack device and 1 base device after enable TSREF

Below snap is the DIR0_ADDR value of 4 stack device and 1 base device when TSREF is disable.

Below is my code

/* USER CODE BEGIN (2) */
int UART_RX_RDY = 0;
int RTI_TIMEOUT = 0;
/* USER CODE END */
BYTE ADRESS[8];
BYTE ADRESS1[8];
BYTE ADRESS2[8];
BYTE ADRESS3[8];
BYTE ADRESS4[8];
int main(void)
{
/* USER CODE BEGIN (3) */

//INITIALIZE TMS570LS1224
systemInit();
gioInit();
sciInit();
rtiInit();
sciSetBaudrate(sciREG, 1000000);
vimInit();
_enable_IRQ();
gioSetDirection(hetPORT1, 0x00000000);

//VARIABLES
BYTE response_frame[(128+6)*TOTALBOARDS]; //store 128 bytes + 6 header bytes for each board
BYTE status[(128+6)*TOTALBOARDS];
BYTE response_frame3[(128+6)*gpio_adc];
printf("\n\n\nBeginning Program\n");

//INITIALIZE 600
//two wakes in case the MCU had nCS and MOSI = 0 at start (which would put the device in shutdown) or in case the device was previously put in shutdown through a shutdown ping
Wake79600(); //send wake ping to bridge device
delayus(3500); //wait tSU(WAKE_SHUT), at least 3.5ms
Wake79600(); //send wake ping to bridge device
delayus(3500); //wait tSU(WAKE_SHUT), at least 3.5ms

//INITIALIZE BQ79616-Q1 STACK
WriteReg(0, CONTROL1, 0x20, 1, FRMWRT_SGL_W); //send wake tone to stack devices
delayms(11.6*TOTALBOARDS); //wake tone duration is ~1.6ms per board + 10ms per board for each device to wake up from shutdown = 11.6ms per 616 board

//AUTO-ADDRESS
AutoAddress(); //auto address sequence

//RESET ANY COMM FAULT CONDITIONS FROM STARTUP
WriteReg(0, FAULT_RST1, 0xFF, 1, FRMWRT_STK_W); //Reset faults on stacked devices
WriteReg(0, FAULT_RST2, 0xFF, 1, FRMWRT_STK_W); //Reset faults on stacked devices
WriteReg(0, Bridge_FAULT_RST, 0x22, 1, FRMWRT_SGL_W); //Reset FAULT_COMM and FAULT_SYS on bridge device

WriteReg(4,CONTROL2,0X01,1, FRMWRT_SGL_W); //tsref enable
delayus(10000);
// WriteReg(0,CONTROL2,0X01,1,FRMWRT_STK_W);
// delayus(1500);
//ENABLE BQ79616-Q1 MAIN ADC
// WriteReg(0, GPIO_CONF2, 0x012, 1, FRMWRT_STK_W);
// WriteReg(0, ACTIVE_CELL, 0x0A, 1, FRMWRT_STK_W); //set all cells to active
// WriteReg(0, ADC_CTRL1, 0x06, 1, FRMWRT_STK_W); //continuous run and MAIN_GO
// delayus(5*TOTALBOARDS + 192); //5us reclocking per board and 192us for round robin to complete

//LOOP VARIABLES
int channel = 0; //iterators
int currentBoard = 0;

do
{
channel = 0;
currentBoard = 0;
delayus(192+5*TOTALBOARDS);
ReadReg(0, VCELL16_HI+(16-ACTIVECHANNELS)*2, response_frame, ACTIVECHANNELS*2, 0, FRMWRT_STK_R);
ReadReg(0, /*AUX_GPIO_HI*/GPIO4_HI, response_frame3, 2, 0, FRMWRT_STK_R);

// ReadReg(0,DEV_STAT,status,1,0,FRMWRT_STK_R);
ReadReg(0, DIR0_ADDR, ADRESS, 1, 0, FRMWRT_SGL_R);
ReadReg(1, DIR0_ADDR, ADRESS1, 1, 0, FRMWRT_SGL_R);
ReadReg(2, DIR0_ADDR, ADRESS2, 1, 0, FRMWRT_SGL_R);
ReadReg(3, DIR0_ADDR, ADRESS3, 1, 0, FRMWRT_SGL_R);
ReadReg(4,DIR0_ADDR, ADRESS4, 1, 0, FRMWRT_SGL_R);
/*
* ***********************************************
* NOTE: SOME COMPUTERS HAVE ISSUES RECEIVING
* A LARGE AMOUNT OF DATA VIA printf STATEMENTS.
* THE FOLLOWING PRINTOUT OF THE RESPONSE DATA
* IS NOT GUARANTEED TO WORK ON ALL SYSTEMS.
* ***********************************************
*/

// printf("\n"); //start with a newline to add some extra spacing between each loop
//only read/print the base device's data if there is no bridge device
for(currentBoard=0; currentBoard<( BRIDGEDEVICE==1 ? TOTALBOARDS-1 : TOTALBOARDS); currentBoard++)
{
printConsole("1st DEVICE ADRESS --%d\n", ADRESS[4]); // bridge device

printConsole("2nd device ADRES--%d\n", ADRESS1[4]);
printConsole("3RD DEVICE ADRESS--%d\n", ADRESS2[4]);

//
printConsole("4TH DEVICE ADRESS---%d\n", ADRESS3[4]);

printConsole("5TH DEVICE ADRESS---%d\n", ADRESS4[4]);

printf("BOARD %d:\t",TOTALBOARDS-currentBoard-1);
//print the data from each active channel (2 bytes each channel)
for(channel=0; channel<(gpio_adc*2); channel+=2)
{
int boardByteStart = (gpio_adc*2+6)*currentBoard;
uint16 rawData = (response_frame3[boardByteStart+channel+4] << 8) | response_frame[boardByteStart+channel+5];
float rawData3 = rawData*0.00015259; //rawData*VLSB_ADC
uint16 rawData2 = (status[4] ) ;

printConsole("%f\t\n", rawData3 );
// printConsole("%d\t\n",rawData2);
printf("\n\r");
delayus(10000000000);
// printf("%f\t", cellVoltage);
}
printf("\n"); //newline per board
}
}while(1);

/* USER CODE END */

return 0;
}

/* USER CODE BEGIN (4) */
/* USER CODE END */

Thanks

Sudhir,

When you do the reads for the device addresses, are you getting valid responses, which would indicate the device somehow getting reset, or just getting all zeroes, which would indicate that communication has failed? You could check this with a logic analyzer or by printing out the entire response frame.

Regards,

Ben

Sudhir,

When you do the reads for the device addresses, are you getting valid responses, which would indicate the device somehow getting reset, or just getting all zeroes, which would indicate that communication has failed? You could check this with a logic analyzer or by printing out the entire response frame.

Regards,

Ben