BQ27441 电池管理芯片 I2C 通信函数实现与应用

/************************************************************************

• LOCAL FUNCTIONS */ void I2CTransfer(uint16_t deviceAddr, uint8_t cmdArray[], uint8_t dataArray[], uint16_t cmdLen, uint16_t dataLen, uint16_t flag) { // Õâ¸öº¯ÊýÓÉi2cReadRegister/i2cWriteRegisterµ÷Óã¬ÊÇ×î»ù±¾µÄI2C´«Ê亯Êý¡£ // Ïȼì²éflag£¬Õâ´Î´«ÊäÊǶÁ»¹ÊÇд // È»ºó¼ì²é¶ÁдµÄ×Ö½ÚÊý£¬¶ÔÕÕBQ27441оƬÊÖ²á

deviceAddr = BQ27441_G1_ADDR;

//¼ì²éflag
if(flag==I2C_FLAG_WRITE_READ)
{
 uint8_t Value = 0x00;
    /* 1.I2CÍâÉè¿ÕÏÐ. */
while(LL_I2C_IsActiveFlag_BUSY(I2C_Handle));

	LL_I2C_IsEnabled(I2C_Handle);
	LL_I2C_EnableBitPOS(I2C_Handle);
	
    /* 2.STARTÐźŠ*/
LL_I2C_AcknowledgeNextData(I2C_Handle, LL_I2C_ACK);
LL_I2C_GenerateStartCondition(I2C_Handle);
while(!LL_I2C_IsActiveFlag_SB(I2C_Handle));

    /* 2.дÆ÷¼þµØÖ· */
LL_I2C_TransmitData8(I2C_Handle, deviceAddr);
while(!LL_I2C_IsActiveFlag_ADDR(I2C_Handle));

LL_I2C_ClearFlag_ADDR(I2C_Handle);
     /* 3.µØַλ. */
while(!LL_I2C_IsActiveFlag_TXE(I2C_Handle));

    /* 4.·¢ËÍÆ÷¼þ¼Ä´æÆ÷µØÖ·. */
LL_I2C_TransmitData8(I2C_Handle, BQ27441_G1_STATE_OF_CHARGE_CMD);
while(!LL_I2C_IsActiveFlag_TXE(I2C_Handle));

    /* 5.RESTARTÐźÅ. */
//LL_I2C_GenerateStopCondition(I2C_Handle);
LL_I2C_GenerateStartCondition(I2C_Handle);
while(!LL_I2C_IsActiveFlag_SB(I2C_Handle));

    /* 6.ÖØз¢ËÍ. */
LL_I2C_TransmitData8(I2C_Handle, deviceAddr<<1);
while(!LL_I2C_IsActiveFlag_ADDR(I2C_Handle));

		if((dataLen == 2))
		{
    /* 7.STOP. */
LL_I2C_AcknowledgeNextData(I2C_Handle, LL_I2C_NACK);
LL_I2C_ClearFlag_ADDR(I2C_Handle);
LL_I2C_GenerateStopCondition(I2C_Handle);
while(!LL_I2C_IsActiveFlag_RXNE(I2C_Handle));

		}
    /* 8.Êý¾Ý¶ÁÈ¡. */
Value = LL_I2C_ReceiveData8(I2C_Handle);
return ;

volatile uint16_t temp = 0; while(1) { temp = BQ27441_G1_GetChecksum(&bq27441_g1); } } else if (flag==I2C_FLAG_WRITE_WRITE) {

}

}

static uint16_t i2cReadRegister(uint16_t addr,uint8_t regOffset) { uint16_t result = 0x00;

uint8_t cmdArray[1];
uint8_t dataArray[2];

cmdArray[0] = regOffset;
I2CTransfer(addr << 1, cmdArray, dataArray, 1, 2, I2C_FLAG_WRITE_READ );

result = (dataArray[1] << 8) | (dataArray[0]);
return result;
return dataArray[0];

}

static void i2cWriteRegister(uint16_t addr,uint8_t regOffset, uint8_t writeData) { uint8_t cmdArray[1]; uint8_t dataArray[2];

cmdArray[0] = regOffset;
dataArray[0] = writeData;
I2CTransfer(addr << 1, cmdArray, dataArray, 1, 2, I2C_FLAG_WRITE_WRITE );

}

/************************************************************************

• FUNCTIONS */

//BQ27441³õʼ»¯ bq27441_g1_t* BQ27441_Init() { /* ³õʼ»¯Í¨ÐÅ½Ó¿Ú */ LL_I2C_Enable(I2C_Handle);

/* ³õʼ»¯BQ27441 */ bq27441_g1.Read = i2cReadRegister; bq27441_g1.Write = i2cWriteRegister;

/* ³õʼ»¯³õʼ»¯BQ27441¼Ä´æÆ÷ */

return &bq27441_g1;

}

//如何在main函数完成相关函数的添加

int main(void) { // 初始化BQ27441 BQ27441_Init();

// 读取状态 of charge uint16_t soc = bq27441_g1.Read(BQ27441_G1_ADDR, BQ27441_G1_STATE_OF_CHARGE_CMD);

// 写入新的状态 of charge bq27441_g1.Write(BQ27441_G1_ADDR, BQ27441_G1_STATE_OF_CHARGE_CMD, 0x80);

// 其它操作...

return 0; }