BQ76930电池电压问题

在按TS1激活之前10块电池总电压是40V，激活后测量只有26V，这是正常的吗？原理图在附件已上传。

huashi cai：

回复 Hugo Zhang:

问题解决了，谢谢

huashi cai：

回复 Hugo Zhang:

请问你们有无STM32与BQ76930通信的例程啊，我写的程序读出来的数据不正确啊，在组织程序方面的具体有哪些步骤？我的邮箱2982148529@qq.com,麻烦有例程给我发一下吧，电路是按官方手册上面画的。

huashi cai：

回复 Hugo Zhang:

你们的参考程序主函数就这么点东西，实现了什么功能？有点看得不是很懂，求解析一下下面这段程序的意思和实现功能，谢谢。

int main(void){int Result;

WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer

DISABLE_INT;

ClockInitialise();

I2CInitialise();

InitialisebqMaximo();

while(1){Result = UpdateVoltageFromBqMaximo();}

return Result;}

int UpdateVoltageFromBqMaximo(){int Result = 0, i = 0;unsigned char *pRawADCData = NULL;unsigned int iTemp = 0;unsigned long lTemp = 0;

Result = I2CReadBlockWithCRC(BQMAXIMO, \VC1_HI_BYTE, \&(Registers.VCell1.VCell1Byte.VC1_HI), \30);

pRawADCData = &Registers.VCell1.VCell1Byte.VC1_HI;for (i = 0; i < 15; i++){iTemp = (unsigned int)(*pRawADCData << 8) + *(pRawADCData + 1);lTemp = ((unsigned long)iTemp * iGain)/1000;lTemp += Registers.ADCOffset;CellVoltage[i] = lTemp;pRawADCData += 2;}

return Result;}

int InitialisebqMaximo(){int result = 0;

Registers.Protect1.Protect1Bit.SCD_DELAY = SCDDelay;Registers.Protect1.Protect1Bit.SCD_THRESH = SCDThresh;Registers.Protect2.Protect2Bit.OCD_DELAY = OCDDelay;Registers.Protect2.Protect2Bit.OCD_THRESH = OCDThresh;Registers.Protect3.Protect3Bit.OV_DELAY = OVDelay;Registers.Protect3.Protect3Bit.UV_DELAY = UVDelay;

result = GetADCGainOffset();

Gain = (365 + ((Registers.ADCGain1.ADCGain1Byte & 0x0C) << 1) + ((Registers.ADCGain2.ADCGain2Byte & 0xE0)>> 5)) / 1000.0;iGain = 365 + ((Registers.ADCGain1.ADCGain1Byte & 0x0C) << 1) + ((Registers.ADCGain2.ADCGain2Byte & 0xE0)>> 5);

Registers.OVTrip = (unsigned char)((((unsigned short)((OVPThreshold – Registers.ADCOffset)/Gain + 0.5) – OV_THRESH_BASE) >> 4) & 0xFF);Registers.UVTrip = (unsigned char)((((unsigned short)((UVPThreshold – Registers.ADCOffset)/Gain + 0.5) – UV_THRESH_BASE) >> 4) & 0xFF);

result = ConfigureBqMaximo();

return result;}