首先发送器件的地址,然后发送需要写EEPROM存储空间的地址,之后就是数据,对于读操作一次可以写1个字节或者多个字节。 写字节操作BYTE WRITE 在起始位产生后,先写器件地址,再写芯片内存地址,再写入数据,最后产生停止位,每写一个字节都要产生ACK位。 页写PAGE WRITE 页写和字节写差不多,在字节写的基础上,连续写入数...
帧 在I²C 协议中,传输总是以帧(frame)为单位进行的。一帧为 8bit,即一字节。主设备和从设备都可以发送帧。 在发送帧时,发送方会逐位 (bit) 发送一字节 (byte) 数据,且先发送最高位(most significant bit,MSB)。例如,如果发送方需要发送 18...
以下是ssd1306.py文件的内容: frommicropythonimport constimport framebuf# register definitionsSET_CONTRAST = const(0x81)SET_ENTIRE_ON = const(0xa4)SET_NORM_INV = const(0xa6)SET_DISP = const(0xae)SET_MEM_ADDR = const(0x20)SET_COL_ADDR = const(0x21)SET_PAGE_ADDR = const(0x22)SET_DISP...
ssd1306_write_byte(0x8D, SSD1306_CMD);//--set Charge Pump enable/disable ssd1306_write_byte(0x14, SSD1306_CMD);//--set(0x10) disable ssd1306_write_byte(0xA4, SSD1306_CMD);// Disable Entire Display On (0xa4/0xa5) ssd1306_write_byte(0xA6, SSD1306_CMD);// Disable Inverse Displa...
unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data *data); /* To determine what the adapter supports */ u32 (*functionality) (struct i2c_adapter *); }; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. ...
/** @brief I2C_WriteByte,向OLED寄存器地址写一个byte的数据 @param addr:寄存器地址 data:要写入的数据 @retval 无 */ void I2C_WriteByte(uint8_t addr, uint8_t data) { // while (I2C_GetFlagStatus(I2CX, I2C_FLAG_BUSY)); // I2C_GenerateSTART(I2CX, ENABLE);//开启I2C1 // while (!
All the bytes are properly handled at lower level: I can see good signal quality and the last byte of a frame is properly signaled with a NACK. The RX FIFO size is of 16 words and the driver set RXWATER to 8 to avoid filling the FIFO. But in rare case, it seems...
i2c,lcd usb驱动 ---杨军（2012 年 4 月 5 日）一、uboot启动流程 第一阶段启动流程：cpu/arm920t/start.S（汇编阶段）进入SVC-->关闭看门狗-->关闭中断-->进入cpu_init_crit（）--->(临时设置栈指针SP)-->调整CPU的频率clock_init() -->把完 整的 {初始化 CPU 和 SDRAM 1.刷新出去 I/D ...
{ //Receive packet to write to slave char buffChar1[10]; if (I2C1_SlaveRdInterruptHandler) { I2C1_SlaveRdInterruptHandler(); #if defined(MultiByte) if (i2c1RdIdx == (NbByteToRd-1)) { // Receive last byte //AppRxCallback(); //Show the received frame sprintf(buffChar1, "\r\n...
I²C Byte Write Please put this data at this address. An I²C byte write is used to write a byte of data to a specific address. Back to top EEPROM Byte Write Procedure Check for bus idle Send start condition, wait for it to complete Write control byte (with device address) Check...