*By default most ADXL345 breakouts CS is already pulled low. This pin is negated. **By default most ADXL345 breakout boards SDO is pulled low so its I2C adress is (0x53 << 1) *** I couldn't get NSS ...

22 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //设置SPI单向或者双向的数据模式:SPI设置为双线双向全双工 23 SPI ...

The system hangs indefinitely when a thread, whose stack is allocated in external SPI RAM (PSRAM), attempts to perform any filesystem operation (e.g., fs_open, fs_write). The filesystem is located on ...

然后检测 RXNE 标志，获取接收缓冲区的状态。等待至接收缓冲区为非空，通过SPI_I2S_ReceiveData函数读取 SPI 的数据寄存器DR。 u8 SPI_FLASH_SendByte(u8 byte) u8 SPI_FLASH_ReadByte(void) 对 FLASH 芯片进行操作：控制 STM32 利用 SPI 总线向 FLASH 芯片发送指令，FLASH 芯片收到指令后就会 ...

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