应用TI的bq76PL455 前端模拟IC遇到问题，无法采集到电池电压

U16 nSent, nRead;// nTopFound = 0;
U16 nDev_ID;// nGrp_ID;
U8 cnt_test = 0;
U8 bFrame[132];
U16 crc;
U32 wTemp = 0;

WakeUp_PL455();
__delay_ms(10);

nSent = PL455_WriteReg(0, 107, 0x8000, 2, FRMWRT_ALL_NR); // clear all fault summary flags
nSent = PL455_WriteReg(0, 81, 0x38, 1, FRMWRT_ALL_NR); // clear fault flags in the system status register
nSent = PL455_WriteReg(0, 14, 0x19, 1, FRMWRT_ALL_NR); // set auto-address mode on all boards
nSent = PL455_WriteReg(0, 12, 0x08, 1, FRMWRT_ALL_NR); // enter auto address mode on all boards, the next write to this ID will be its address

for (nDev_ID = 0; nDev_ID < TOTALBOARDS; nDev_ID++)
{
nSent = PL455_WriteReg(nDev_ID, 10, nDev_ID, 1, FRMWRT_ALL_NR); // send address to each board
}

nSent = PL455_WriteReg(0, 16, 0x1080, 2, FRMWRT_SGL_NR);
// Clear all faults 
nSent = PL455_WriteReg(0, 82, 0xffc0, 2, FRMWRT_SGL_NR); // clear all fault summary flags
nSent = PL455_WriteReg(0, 81, 0x38, 1, FRMWRT_SGL_NR); // clear fault flags in the system status register
////////////////////////////////////////////////////////////////////////////////////////////////
//nSent = PL455_WriteReg(0, 60, 0x00, 1, FRMWRT_SGL_NR);
nSent = PL455_WriteReg(0, 61, 0x00, 1, FRMWRT_SGL_NR); // set 0 initial delay

nDev_ID = 0;
nSent = PL455_WriteReg(nDev_ID, 62, 0xBC, 1, FRMWRT_SGL_NR); // set 99.92us ADC sampling period

nDev_ID = 0;

//建议8次oversample。
nSent = PL455_WriteReg(nDev_ID, 7, 0x00, 1, FRMWRT_SGL_NR); // set no oversampling period

nDev_ID = 0;
nSent = PL455_WriteReg(nDev_ID, 81, 0x38, 1, FRMWRT_SGL_NR); // clear fault flags in the system status register
nRead = PL455_ReadReg(nDev_ID, 81, &wTemp, 1, 4); // 0ms timeout

nSent = PL455_WriteReg(nDev_ID, 82, 0xFFC0, 2, FRMWRT_SGL_NR); // clear all fault summary flags
nRead = PL455_ReadReg(nDev_ID, 82, &wTemp, 1, 4); // 0ms timeout

nSent = PL455_WriteReg(0, 13, 0x08, 1, FRMWRT_SGL_NR); // set number of cells to 8
nSent = PL455_WriteReg(0, 3, 0x00FF03C0, 4, FRMWRT_SGL_NR); // select all cell channels 1-8, AUX channels 0 and 1, and internal digital die and internal analog die temperatures

nDev_ID = 0;
nSent = PL455_WriteReg(nDev_ID, 144, 0xD1EC, 2, FRMWRT_SGL_NR); // set OV threshold = 4.1000V
nSent = PL455_WriteReg(nDev_ID, 142, 0x6148, 2, FRMWRT_SGL_NR); // set UV threshold = 1.9000V

nSent = PL455_WriteReg(0, 144, 0xD1EC, 2, FRMWRT_ALL_NR); // set OV threshold = 4.1000V 
nSent = PL455_WriteReg(0, 142, 0x6148, 2, FRMWRT_ALL_NR); // set UV threshold = 1.9000V

//无效,建议删除

nSent = PL455_WriteReg(0, 2, 0x02, 1, FRMWRT_ALL_NR); // send sync sample command

//无效,建议删除

nSent = PL455_WriteReg(0, 2, 0x00, 1, FRMWRT_ALL_NR); // send sync sample command

//重复配置可以省略

nSent = PL455_WriteReg(0, 13, 0x08, 1, FRMWRT_SGL_NR); // set number of cells to 8
nSent = PL455_WriteReg(0, 3, 0x00FF03C0, 4, FRMWRT_SGL_NR); // select all cell channels 1-8, AUX channels 0 and 1, and internal digital die and internal analog die temperatures

nDev_ID = 0;

//发送sample and store 指令， 并delay 5ms，

nSend = PL455_WriteReg(0, 2, 0x00, 1, FRMWRT_ALL_NR);

_delay_ms(5);

nSent = PL455_WriteReg(nDev_ID, 2, 0x20, 1, FRMWRT_SGL_R); // send sync sample command //发送采样命令

nSent = WaitRespFrame(bFrame, 27, 4); // 24 bytes data + packet header + CRC, 0ms timeout //读取采集数据

while(1)
{////发送采集命令后在此查询接收到的数据（1）//接收断点1
PIN_LED = !PIN_LED;
__delay_ms(2000);
ClrWdt();
Uart_SendChar1(rx_buf,27); //打印接收到的数据
}

在接收断点1处，接收到来自于前端IC传过来的数据为：(8路节电池电压和四路AUX电压)
 17 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 87 7C 00 00 17 97
 17 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 86 eC 00 00 16 46

17 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 86 f4 00 00 96  41

.......

//一直不明白为什么返回来的数据电压点都不对！电路板是官网的DEMO，只是控制端用单片机来处理。
由于项目紧急，只能在论坛上请求支持！ 期待TI的技术支持能给以帮助！

谢谢TI员工的回复！

烧写就是把当前ram里的配置值写入到eeprom ， 下次上电自动载入。

但是注意

1 . 不是所有寄存器都有对应的eeprom 状态寄存器 故障寄存器。还有一些测试寄存器 没有对应的eeprom， 如果要修改 依然要上电就配置 具体参照dataflash的描述

2. 地址寄存器也会被烧写 下次启动会自动载入eeprom的地址 ， 如果是通过菊花链链接 而不是在同一个板子上的话 启动需要软件再做一次autoaddress分配地址。如果芯片发生复位 地址会变成eeprom内的地址，如果系统干扰导致芯片复位  一定要注意处理可能出现的地址变化的状况 做一次autoaddress

3. 烧写次数不超过5次，一般是产线下线检测和校准的之后做烧写即可

91 00 0C 10 2830 是用来使能EEPROM的烧写。

写入magic就是让455A将当前寄存器的值保存到EEPROM中， 是整块区域所有的都保存。不能单个bit的写。

0x0c没有EEPROM。无法保存。请看page66的表格确认你要改的寄存器有没有EEPROM.

另外，烧写前请清除Customer check sum 错误。