帮忙看一下代码和日志写的有没有问题，是按照文档bq27421-Technical Reference里面的3.1发送的命令，是文档3.1的命令顺序.
unsigned int battery_ModifyDesignCapacity(void)
{
uint8_t data[4]={0};
uint8_t dataBuf[2]={0};
uint8_t addr = 0x55;
unsigned int volt = 0;
uint8_t ret = 0;
uint8_t OLD_Csum = 0;
uint8_t OLD_DesCap_MSB = 0;
uint8_t OLD_DesCap_LSB = 0;
uint8_t temp = 0;
uint8_t NEW_Csum = 0;
DBG_STR("----------------ModifyDesignCapacity---------------");
data[0] = 0x06;//flags
ret = GPIO_I2CWriteByte(addr, data[0], 0);
ret = GPIO_I2CReadNByte(addr, dataBuf, 2, 0);
data[0] = 0x00;
data[1] = 0x00;
data[2] = 0x80;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 3, 0);
data[0] = 0x00;
data[1] = 0x00;
data[2] = 0x80;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 3, 0);
data[0] = 0x00;
data[1] = 0x13;
data[2] = 0x00;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 3, 0);
mdelay(2000);
data[0] = 0x06;//flags
ret = GPIO_I2CWriteByte(addr, data[0], 0);
ret = GPIO_I2CReadNByte(addr, dataBuf, 2, 0);
data[0] = 0x61;
data[1] = 0x00;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 2, 0);
data[0] = 0x3E;
data[1] = 0x52;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 2, 0);
data[0] = 0x3F;
data[1] = 0x00;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 2, 0);
data[0] = 0x60;//OLD_Csum
ret = GPIO_I2CWriteByte(addr, data[0], 0);
ret = GPIO_I2CReadNByte(addr, dataBuf, 1, 0);
//DBG_HEX("OLD_Csum(60):", dataBuf, 2);
OLD_Csum = dataBuf[0];
DBG_STR("OLD_Csum=%x",OLD_Csum);
mdelay(100);
data[0] = 0x4A;//OLD_DesCap_MSB
ret = GPIO_I2CWriteByte(addr, data[0], 0);
ret = GPIO_I2CReadNByte(addr, dataBuf, 1, 0);
OLD_DesCap_MSB = dataBuf[0];
DBG_STR("OLD_DesCap_MSB=%x",dataBuf[0]);
mdelay(100);
data[0] = 0x4B;//OLD_DesCap_MSB
ret = GPIO_I2CWriteByte(addr, data[0], 0);
ret = GPIO_I2CReadNByte(addr, dataBuf, 1, 0);
OLD_DesCap_MSB = dataBuf[0];
DBG_STR("OLD_DesCap_LSB=%x",dataBuf[0]);
data[0] = 0x4A;
data[1] = 0x01;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 2, 0);
//mdelay(100);
data[0] = 0x4B;
data[1] = 0x72;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 2, 0);
temp = (255 - OLD_Csum- OLD_DesCap_MSB- OLD_DesCap_LSB)%256;
NEW_Csum = 255 - (temp + 0x04 + 0xB0)%256;
DBG_STR("temp=%d,NEW_Csum=%d",temp,NEW_Csum);
data[0] = 0x60;
data[1] = NEW_Csum;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 2, 0);
data[0] = 0x00;
data[1] = 0x42;
data[2] = 0x00;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 3, 0);
data[0] = 0x06;//flags
ret = GPIO_I2CWriteByte(addr, data[0], 0);
ret = GPIO_I2CReadNByte(addr, dataBuf, 2, 0);
DBG_HEX("Flags(06):", dataBuf, 2);
mdelay(100);
data[0] = 0x00;
data[1] = 0x20;
data[2] = 0x00;
ret = GPIO_I2CWriteNByte(addr, dataBuf, 3, 0);
DBG_STR("----------------ModifyDesignCapacity---------end------");
}
----------------ModifyDesignCapacity---------------
Flags(06):a8 7f
1-Flags(06):a8 7f
OLD_Csum=0
OLD_DesCap_MSB=0
OLD_DesCap_LSB=0
temp=255,NEW_Csum=76
Flags(06):a8 7f
----------------ModifyDesignCapacity---------end------
