第一种是内核默认实现的通用型的I2C设备驱动,位于drivers/i2c/i2c-dev.c中。 这种方式仅仅只是封装了I2C的基本操作,相当于只是封装了I2C的基本时序,向应用层只提供了I2C基本操作的接口,该接口通用于所有的I2C设备。具体设备相关的操作,需要开发者在应用层根据硬件特性来完成对设备的操作。该方式的优点就是通用,而缺...
A robust state machine is provided for controlling a slave interface to an I2C-bus. The state machine is configured to enforce the slave-device-protocol of the I2C specification, and to provide recovery from anomalous master-device behavior. In accordance with this invention, the state transitions...
本次实验我们把FPGA作为主设备,把挂载在总线上的其他设备(ADV7513)作为从设备。I2C 总线数据传输速率在标准模式下可达 100kbit/s,快速模式下可达400kbit/s,高速模式下可达 3.4Mbit/s。 I2C 总线上的主设备与从设备之间以字节(8 位)为单位进行双向的数据传输。 2) I2C时序 通过查阅ADV7513的数据手册,可以大概的...
c_state <= #1 ST_STOP; core_cmd <= #1 `I2C_CMD_STOP; end ld <= #1 1'b1; end ST_START : if (core_ack) begin if (read) begin c_state <= #1 ST_READ; core_cmd <= #1 `I2C_CMD_READ; end else begin c_state <= #1 ST_WRITE; core_cmd <= #1 `I2C_CMD_WRITE; end ld ...
state of the I2C state machine */i2c1Obj.state = I2C_STATE_IDLE;}/* I2C state machine */...
1.2 smdk2440_machine_init staticvoid__init smdk2440_machine_init(void) { s3c24xx_fb_set_platdata(&smdk2440_fb_info); s3c_i2c0_set_platdata(NULL);// 初始化s3c_device_i2c0.dev.platform_dataplatform_add_devices(smdk2440_devices, ARRAY_SIZE(smdk2440_devices));//s3c2440若干个platform设备注册...
1、由于STM32的硬件问题,建议在使用I2C时,将其优先级设为最高。 2、针对程序中除了I2C数据收发,还有别的中断程序或者指令要执行而导致I2C数据传输堵塞时,可以在执行完该段程序后重新初始化I2C。 主机程序如下: 1 #include "Hal_IIC/I2C.h" 2 #include "Hal_delay/delay.h" ...
Current state of the I2C state machine. Current status of the I2C master. Controls the master end of the transaction with or without generating a Stop. Pointer to the master read buffer. Size of the master read buffer. Current index within the master read buffer. Pointer to the master ...
然后在static void __init smdk6410_machine_init(void)函数中声明该I2C设备: i2c_register_board_info(1, i2c_devs1, ARRAY_SIZE(i2c_devs1)); 2.2 Cypress 7958驱动部分设计 2.2.1 注册和注销模块 首先建立I2C驱动结构体,cypress_7958_driver,代码如下: static struct i2c_driver cypress_7958_driver={ .pr...
/* Used to track the state of the software state machine*/ I2C_Mode SlaveMode = RX_REG_ADDRESS_MODE; /* The Register Address/Command to use*/ uint8_t ReceiveRegAddr = 0; /* ReceiveBuffer: Buffer used to receive data in the ISR ...