[参考译文] BQ27441-G1：设置容量并显示正确的值

Jonny、您好！

在尝试修改每个参数之前、我已确保正确配置了 SET_CFGUPDATE 子命令。 此外、我已经验证了它是否成功更新了状态。

以下代码供您参考。 请查看：

_Bool setCapacity(uint16_t capacity)
{
	// Write to STATE subclass (82) of BQ27441 extended memory.
	// Offset 0x0A (10)
	// Design capacity is a 2-byte piece of data - MSB first
	// Unit: mAh
	uint8_t capMSB = capacity >> 8;
	uint8_t capLSB = capacity & 0x00FF;
	uint8_t capacityData[2] = {capMSB, capLSB};
	return writeExtendedData(BQ27441_ID_STATE, 10, capacityData, 2);
}

_Bool writeExtendedData(uint8_t classID, uint8_t offset, uint8_t *data, uint8_t len)
{
	if (len > 32)
		return false;

	if (!_userConfigControl)
		enterConfig(false);
	printf("in write extended data\n");
	if (!blockDataControl())	  // // enable block data memory control
		return false;			  // Return false if enable fails
	if (!blockDataClass(classID)) // Write class ID using DataBlockClass()
		return false;

	blockDataOffset(offset / 32); // Write 32-bit block offset (usually 0)
	computeBlockChecksum();		  // Compute checksum going in
	uint8_t oldCsum = blockDataChecksum();
	printf("after checksum data\n");
	//  Write data bytes:
	for (int i = 0; i < len; i++)
	{
		// Write to offset, mod 32 if offset is greater than 32
		// The blockDataOffset above sets the 32-bit block
		writeBlockData((offset % 32) + i, data[i]);
	}
	printf("wroteblock data\n");
	// Write new checksum using BlockDataChecksum (0x60)
	uint8_t newCsum = computeBlockChecksum(); // Compute the new checksum
	writeBlockChecksum(newCsum);

	if (!_userConfigControl)
		exitConfig(true);

	return true;
}
_Bool enterConfig(_Bool userControl)
{
	if (userControl)
		_userConfigControl = true;

	if (sealed())
	{
		_sealFlag = true;
		printf("doing unseal\n");
		unseal(); // Must be unsealed before making changes
	}
	printf("Now in execute control word\n");
	if (executeControlWord(BQ27441_CONTROL_SET_CFGUPDATE))
	{
		int16_t timeout = BQ72441_I2C_TIMEOUT;
		while ((timeout--) && (!(flags() & BQ27441_FLAG_CFGUPMODE)))
		{
			printf("in while loop\n");
			delay1(1);
		}

		if (timeout > 0)
			return true;
	}
	printf("timeout occured\n");
	return false;
}