ret = i2c_master_send(client, buf, count); 写函数 ret = i2c_transfer(client->adapter, msg, 2); 读函数 在中断上下文中, 调用 I2C 驱动层的读写函数对外围器件进行读写 ret = hi_i2c_master_send(client, buf, count); 写函数 ret = hi_i2c_transfer (client->adapter, msg, 2); 读函数 参...
使用HAL_I2C_Mem_Write与HAL_I2C_Mem_Read这两个函数就可以实现对AT24C02的读写 static uint8_t data = 0; static uint8_t addr = 0; addr++; if(addr >= 0x66) { addr = 0; } HAL_I2C_Mem_Write(&hi2c1, 0xa0, addr, I2C_MEMADD_SIZE_8BIT, &addr, 1, 10); HAL_Delay(10); HAL_I...
HAL_I2C_Mem_Read的第一次DevAddress为地址,7bit, bit0为0代表写,为1代表读。 MemAddress为1代表寄存器或存储器地址,MemAddSize代表寄存器或存储器长度。然后为新的第一start,再输入7bit的0,bit0为1代表读,然后读取指定长度的数据存放在pData中
hal_i2c_mem_read_dma是嵌入式系统中用于在I2C总线上执行直接内存访问(DMA)读取操作的函数。该函数利用I2C外设的DMA能力,将数据有效地从指定的内存地址传输到微控制器内存中的缓冲区。当调用该函数时,微控制器通过配置I2C外设在接收到数据字节时生成DMA请求来启动DMA传输。然后DMA控制器将从I2C外设的数据寄存器中接收...
HAL_StatusTypeDef res = HAL_I2C_Mem_Write(hi2c, DevAddress, mem_base_address + offset, I2C_MEMADD_SIZE_16BIT, &val, 1, 100); HAL_Delay(1); } /** * @brief Reads a byte from i2c_eeprom memory */ uint8_t persistent_memory_i2c_eeprom::read_val(uint32_t ...
HAL_I2C_Mem_Write()函数位于stm32fxx_hal_i2c.c文件的2432行,源代码对该函数的解释如下图 HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout ); ...
在计时器触发的中断中使用HAL_I2C_Mem_Read函数（I2C数据读取）可能导致代码卡死，这通常是由于中断优先...
>>> i2c.mem_read(8, 0x34, 0) Traceback (most recent call last): File "<stdin>", line 0, in <module> Exception: HAL_I2C_Mem_Read failed with code 1 The workaround of using separate send() and recv() transactions to send the starting address and read back the data does not ...
如何使用 HAL_I2C_Mem_Read 和 HAL_I2C_Mem_Write 函数读写 i2c eeprom。如何将 uint16_t 转换为 uint8_t 并将 uint32_t 转换为 uint8_t ...
其函数原型如下: HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout) 参数说明如下: * hi2c:I2C句柄 * DevAddress:I2C设备地址 * MemAddress:要写入的内存地址 * ...