i2c_master_start(cmd);// 启动I2C 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_begi...
#include<Wire.h>voidsetup(){ Wire.begin();// join i2c bus (address optional for master)Serial.begin(9600);// start serial for output}voidloop(){ Wire.requestFrom(2,6);// request 6 bytes from slave device #2while(Wire.available())// slave may send less than requested{charc = Wire...
引入的头文件: #include"driver/i2c.h"#include<unistd.h>#include"oledfont.h" I2C结构体初始化: voidi2c_config(){//配置驱动程序i2c_config_t i2c_Structure;i2c_Structure.mode=I2C_MODE_MASTER;i2c_Structure.sda_io_num=21;//sda引脚号i2c_Structure.scl_io_num=22;//scl引脚号i2c_Structure.sda_pu...
< I2C master will not check ack from slave */ #define ACK_VAL 0x0 /*!< I2C ack value */ #define NACK_VAL 0x1 /*!< I2C nack value */ /** * @brief IIC初始化 * * @return esp_err_t */ esp_err_t i2c_master_init(void) { int i2c_master_port = I2C_MASTER_NUM; i2c_confi...
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_cmd_link_delete(i2c_cmd);//删除IIC命令链表 } uint8_t PCA9685_IIC_PWMServoDriver_read8(uint8_t addr) {
W (814) i2c: This driver is an old driver, please migrate your application code to adapt `driver/i2c_master.h` I have to migrate my code, but I can't find any example on how to use this new driver. Did you find it? Thanks. ...
#include < Wire.h >voidsetup() { Wire.begin(); //joini2c bus (address optionalformaster)Serial.begin(9600); //startserialforoutput }voidloop() { Wire.requestFrom(2,6); // request6bytesfromslave device #2while(Wire.available()) // slave may send less than requested ...
I2C只需要两个引脚,不管连接几个I2C设备都是使用SDA和SCL。这使得它在连接多个设备时非常方便,因为它占用的引脚相对较少。 I2C 与 SPI 的 SDA 不一样 • SPI的SDA:在SPI通信中,SDA通常指的是MOSI(Master Out Slave In),全称是"Master Out Slave In",表示主设备输出数据给从设备。
-|*/staticesp_err_ti2c_master_sensor_test(i2c_port_ti2c_num,uint8_t*data_h,uint8_t*data_l){intret;i2c_cmd_handle_tcmd=i2c_cmd_link_create();// 在执行i2c之前,必须执行此函数 创建一个i2c 命令 链接,为之后的i2c操作执行,在执行完成之后需要销毁i2c_master_start(cmd);//i2c运行开始函数。