i2c_cmd_handle_t cmd = i2c_cmd_link_create();i2c_master_start(cmd);i2c_master_write_byte(...
停止信号 🛠️ ESP32的I2C编程API: i2c_param_config:配置I2C引脚。 i2c_driver_install:安装I2C驱动。 i2c_cmd_link_create:创建一个I2C命令链表。 i2c_master_start:添加起始信号。 i2c_master_write_byte:写入一个字节。 i2c_master_read_byte:读取一个字节。 i2c_master_stop:发送停止信号。 i2c_master_...
i2c_master_write_byte(cmd, ( TCS34725_address <<1) | I2C_MASTER_WRITE, ACK_CHECK_EN);// 发送地址+写+检查ack i2c_master_write_byte(cmd, reg_addr, ACK_CHECK_EN);// 发送ID寄存器地址 i2c_master_stop(cmd);// 关闭发送I2C err = i2c_master_cmd_begin(I2c_NUM, cmd,1000/ portTICK_RAT...
i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_master_start(cmd); i2c_master_write_byte(cmd, ( ESP_SLAVE_ADDR << 1 ) | READ_BIT, ACK_CHECK_EN); if(size > 1) { i2c_master_read(cmd, data_rd, size - 1, ACK_VAL); } i2c_master_read_byte(cmd, data_rd + size - 1,...
然后,初始化给定 I2C 端口的配置,请使用端口号和i2c_config_t作为函数调用参数来调用i2c_param_config()函数。 配置示例(主机): int i2c_master_port = 0; i2c_config_t conf = { .mode = I2C_MODE_MASTER, .sda_io_num = I2C_MASTER_SDA_IO, // select GPIO specific to your project ...
However, I miss a way to check the length of the out buffer on the slave side, to know whether the master read the bytes. If anyone needs a working two devices I2C ESP32 to ESP32 example, please benefit from my experiments Master: https://github.com/juri117/esp32-i2c-slave Slave:...
i2c_master_write_byte(i2c_cmd, addr, true);//IIC写入寄存器地址 i2c_master_write_byte(i2c_cmd, d, true);//IIC写入数据 i2c_master_stop(i2c_cmd);//IIC停止信号发送 i2c_master_cmd_begin(PCA9685_IIC_port, i2c_cmd, 1000 / portTICK_RATE_MS);//IIC命令链表开始执行,等待1000ms超时时间 ...
i2c_master_start(cmd); //发出起始信号 i2c_master_write_byte(cmd,(MPU6050_ADDRESS<<1)|I2C_MASTER_WRITE,true); //写入地址 i2c_master_write_byte(cmd,reg_add,true); //写入寄存器地址 i2c_master_write_byte(cmd,reg_dat,true); //写入值 i2c_master_stop(cmd); //发出停止信号 ret ...
数据- 一个或多个字节的数据作为i2c_master_write()的实参。 停止位 -i2c_master_stop() 函数i2c_master_write_byte()和i2c_master_write()都有额外的实参,规定主机是否应确认其有无接受到 ACK 位。 通过调用i2c_master_cmd_begin()来触发 I2C 控制器执行命令链接。一旦开始执行,就不能再修改命令链接。
{i2c_cmd_handle_t cmd=i2c_cmd_link_create();i2c_master_start(cmd);i2c_master_write_byte(cmd,oled_12864_addr|I2C_MASTER_WRITE,1);i2c_master_write_byte(cmd,oled_write_data,1);i2c_master_write_byte(cmd,pdata,1);i2c_master_stop(cmd);i2c_master_cmd_begin(0,cmd,0x100);i2c_cmd_link...