i2c_match_id(const struct i2c_device_id *id, const struct i2c_client *client)函数: 这个函数用于在给定的i2c_device_id数组中查找与给定i2c_client匹配的设备ID。 然后通过遍历id数组中的每个设备ID,将client的名称与设备ID的名称进行比较,如果找到匹配的设备ID,则返回该设备ID。 const struct i2c_device_id...
i2cmasterlogic Module是I2C Master Core逻辑实现部分,所包含接口如下所示: clk_in 时钟输入信号,该信号直接影响I2C总线工作频率,典型输入频率为100Kbit/s,可使I2C总线工作在100K标准模式下,如果从机设备支持快速或高速模式,该时钟频率可响应输入更高频率,如400Kbit/s或者3.4Mbit/s。
Core I2C时钟频率的定义如表 2所示。 ● 状态寄存器——I2C_STA 状态寄存器取出所有内部状态位并将它们压缩成一个5位的代码,该代码与每个I2C总线状态位一一对应,5位代码可用于产生向量地址,以便快速处理不同的服务程序,每个服务程序处理一个特定的总线状态。如果I2C模块的所有模式都被使用,则有26种可能的总线状态。
iowrite16(value, i2c->base + (reg << i2c->reg_shift)); } static void oc_setreg_32(struct ocores_i2c *i2c, int reg, u8 value) { iowrite32(value, i2c->base + (reg << i2c->reg_shift)); } static void oc_setreg_16be(struct ocores_i2c *i2c, int reg, u8 value) { iowri...
case I2C_MAX_FAST_MODE_FREQ: return "Fast Mode (400 kHz)"; case I2C_MAX_FAST_MODE_PLUS_FREQ: return "Fast Mode Plus (1.0 MHz)"; case I2C_MAX_TURBO_MODE_FREQ: return "Turbo Mode (1.4 MHz)"; case I2C_MAX_HIGH_SPEED_MODE_FREQ: return "High Speed Mode (3.4 MHz)"; case I2C_MA...
CoreI2C provides an APB-driven serial interface, supporting Philips Inter-Integrated Circuit (I2C), SMBus, and PMBus data transfers. Features and Benefits Conforms to the I2C v2.1 Specification (7-bit addressing format at 100 Kbps and 400 Kbps data rates) ...
在函数中只有return=adap->algo->master_xfer(adap,msgs,num) 能发现它是s3c24xx_i2c_algorithm中的成员.masrter_xfer = s324xx_i2c_xfer,又因i2c->adap.algo = &s3c24xx_i2c_algorithm,可以怀疑以前我们找出来的是正确的,其中一个方法可以改改我们找到那个.c文件中的该函数中加点打印信息即可验证他是否我们...
On a I2C_SMBUS_I2C_BLOCK_DATA read request, if data->block[0] is greater than I2C_SMBUS_BLOCK_MAX + 1, the underlying I2C driver writes data out of the msgbuf1 array boundary. It is possible from a user application to run into that issue by calling the I2C_SMBUS ioctl with data...
I use Avalon I2C core in Arria-ii/NIOS-ii. I wanted to test what happens in case of failure on the i2c bus. For that I connected the i2c data line to ground for a short time. I expected i2c to stop working while i2c data pin is connected to the group and then to recover. ...
The I2C-MS core is a controller for the Inter-Integrated Circuit (I2C) bus. The highly configurable core can implement an I2C bus master, slave, or a combined master and slave, and it communicates with the host via an APB, AHB, or Wishbone slave interface. The core supports all variati...