[参考译文] BQ76952：BQ76952中的负载检测

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1491407/bq76952-load-detection-in-bq76952

工具与软件：

我将 BQ76952与 STM32连接、我能够读取电池电压、电流和温度数据、并能够控制 CHG 和 DSG MOSFET。 我还需要在 BQ76952上使用负载检测、因为我已启用 负载检测 并设置 负载检测运行时间 、 重试延迟 和 超时 . 下面给出了相同的代码。 但是  LD_ON I S 始终为0 与负载连接无关。  

任何人都可以确认配置负载检测的正确方法是否正确、以及配置负载检测的正确方法是否正确。 我想使用负载检测功能将 AFE 从睡眠状态中唤醒、并从短路和过放电中恢复

CommandSubcommands(LOAD_DETECT_ON); // Enable theLoad Detect

BQ769x2_SetRegister(0x92B4, 0x0050, 2);  // Set Load Detect Active Time
BQ769x2_SetRegister(0x92B5, 0x0010, 2);  // Set Load Detect Retry Delay
BQ769x2_SetRegister(0x92B6, 0x0078, 2);  // Set Load Detect Timeout


//Function to read LD_ON Status
void BQ769x2_ReadControlStatus(void) { 
	// Read Control Status for Load Detection
	DirectCommands(ControlStatus, 0x00, R);
	ControlBits = (RX_data[1]*256 + RX_data[0]);
  LD_ON = (0x1 & RX_data[0]);// Load Detection status
}

void CommandSubcommands(uint16_t command) //For Command only Subcommands
// See the TRM or the BQ76952 header file for a full list of Command-only subcommands
{	//For DEEPSLEEP/SHUTDOWN subcommand you will need to call this function twice consecutively
	
	uint8_t TX_Reg[2] = {0x00, 0x00};

	//TX_Reg in little endian format
	TX_Reg[0] = command & 0xff;
	TX_Reg[1] = (command >> 8) & 0xff;

	I2C_WriteReg(0x3E,TX_Reg,2); 
	delay_1us(2000);
}


void BQ769x2_SetRegister(uint16_t reg_addr, uint32_t reg_data, uint8_t datalen)
{
	uint8_t TX_Buffer[2] = {0x00, 0x00};
	uint8_t TX_RegData[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

	//TX_RegData in little endian format
	TX_RegData[0] = reg_addr & 0xff; 
	TX_RegData[1] = (reg_addr >> 8) & 0xff;
	TX_RegData[2] = reg_data & 0xff; //1st byte of data

	switch(datalen)
    {
		case 1: //1 byte datalength
      I2C_WriteReg(0x3E, TX_RegData, 3);
			delay_1us(2000);
			TX_Buffer[0] = Checksum(TX_RegData, 3); 
			TX_Buffer[1] = 0x05; //combined length of register address and data
      		I2C_WriteReg(0x60, TX_Buffer, 2); // Write the checksum and length
			delay_1us(2000);
			break;
		case 2: //2 byte datalength
			TX_RegData[3] = (reg_data >> 8) & 0xff;
			I2C_WriteReg(0x3E, TX_RegData, 4);
			delay_1us(2000);
			TX_Buffer[0] = Checksum(TX_RegData, 4); 
			TX_Buffer[1] = 0x06; //combined length of register address and data
      		I2C_WriteReg(0x60, TX_Buffer, 2); // Write the checksum and length
			delay_1us(2000);
			break;
		case 4: //4 byte datalength, Only used for CCGain and Capacity Gain
			TX_RegData[3] = (reg_data >> 8) & 0xff;
			TX_RegData[4] = (reg_data >> 16) & 0xff;
			TX_RegData[5] = (reg_data >> 24) & 0xff;
			I2C_WriteReg(0x3E, TX_RegData, 6);
			delay_1us(2000);
			TX_Buffer[0] = Checksum(TX_RegData, 6); 
			TX_Buffer[1] = 0x08; //combined length of register address and data
      		I2C_WriteReg(0x60, TX_Buffer, 2); // Write the checksum and length
			delay_1us(2000);
			break;
    }
}