如何使用MCC生成的I2C函数一次读取多个寄存器

我不使用MCC，所以这只是猜测。如果你能读一个寄存器，你不能告诉它只读取一个字节吗？如果您继续阅读，芯片将只输出顺序寄存器值。



      以下为原文

    I don't use MCC, so this is just guesswork.
If you are able to read a single register, can't you tell it to just read more than one byte?
The chip will just keep outputting sequential register values if you keep reading.

谁告诉你的？



      以下为原文

    Who told you that bullsh¡t?

Hi，传感器可能有大于一字节的I2C传输协议，只需字节，必须根据实际设备类型的数据表计算实际寄存器的内容传输所需的字节数。McC有2种或3种不同的I2C传输方式，它们有不同的应用接口，无论是基础服务库还是MCC设备库。总之，有一个长度参数来指定您想要的寄存器字节数。阅读：例子：MysIL



      以下为原文

    Hi,
Sensor may have registers that are larger than one byte.
I2C transfer deal with bytes only, you must count up the number of bytes needed to transfer contents of actual register, according to datasheet for the actual device type.
 
Many device types have possibility to read multiple registers in sequence, in the same transfer.
See datasheet for the sensor.
 
MCC have 2 or 3 different ways of doing I2C transfers, that have different application interface,
either Foundation Services library, or MCC device library.
Anyway, there is a length argument to specify the number of Register Bytes that you want to read:
example:
static uint8_t data[8];          /* Data array to hold the largest number of register bytes wanted. */
uint8_t length;
static I2C1_MESSAGE_STATUS   I2C1status;    /* Static or global variable to receive status from I2C transfer. */
 
    length = 4;        /* Set number of register bytes wanted in this transfer. */
    I2C1_MasterRead( data, length,  address,   &I2C1status);
...
  
   Mysil