最近在按照官方的SPI历程跟OLED通信，发现有几个参数不是很明白：
typedef struct {
SPI_TransferMode transferMode; /*!< Blocking or Callback mode */
uint32_t transferTimeout; /*!< Transfer timeout in system
ticks */
SPI_CallbackFxn transferCallbackFxn;/*!< Callback function pointer */
SPI_Mode mode; /*!< Master or Slave mode */
/*! @brief SPI bit rate in Hz
*
* Maximum bit rates supported by hardware:
* Device Family | Slave Max (MHz) | Master Max (MHz) |
* ------------- | ------------------ | ---------------- |
* MSP432P4 | 16 MHz | 24 MHz |
* MSP432E4 | 10 MHz | 60 MHz |
* CC13XX/CC26XX | 4 MHz | 12 MHz |
* CC32XX | 20 MHz | 20 MHz |
*
* Please note that depending on the specific use case, the driver may not
* support the hardware's maximum bit rate.
*/
uint32_t bitRate;
uint32_t dataSize; /*!< SPI data frame size in bits */
SPI_FrameFormat frameFormat; /*!< SPI frame format */
void *custom; /*!< Custom argument used by driver
implementation */
} SPI_Params;
在Params中：transferMode中包含了阻塞模式和回调模式，这两个模式有什么区别？阻塞模式会在我发送完数据以后阻塞我的主进程代码的运行吗？回调模式又是如何来理解呢？
还有bitRate我可以理解为传输速度吗？传输速度对从机设备有要求吗？这个传输速度在SPI的时序图上该如何来理解呢？
