配置驱动程序:使用i2c_param_config()函数配置I2C参数,包括源时钟、通信速度等。 安装I2C驱动:通过调用相关函数安装I2C驱动。 数据读写:在主机模式下,使用i2c_master_transmit()和i2c_master_transmit_receive()函数进行数据的发送和接收;在从机模式下,则使用i2c_slave_receive()
HAL_StatusTypeDef HAL_I2C_Master_Receive (I2C_HandleTypeDef * hi2c, uint16_t 1. DevAddress, uint8_t * pData, uint16_t Size, uint32_t Timeout) Function description Receives in master mode an amount of data in blocking mode. Parameters • hi2c: Pointer to a I2C_HandleTypeDef structure ...
{ .dev_addr_length = I2C_ADDR_BIT_LEN_7, .device_address = 0x68, .scl_speed_hz = 10000, }; i2c_master_dev_handle_t dev_handle; ESP_ERROR_CHECK(i2c_master_bus_add_device(i2c_bus_handle, &dev_cfg, &dev_handle)); status = i2c_master_transmit_receive(dev_handle, &targetAddress,...
Wire.begin(2); // join i2c bus with address #2 Wire.onReceive(receiveEvent); // call receiveEvent when the master send any thing Serial.begin(9600); // start serial for output to print what we receive } void loop() { delay(250); } //---this function will execute whenever data ...
res = i2c_master_receive(*dev_handle, buf, buflen, -1); res = ESP_OK; if (res != ESP_OK) { printf("I2C read error: %s\n", esp_err_to_name(res)); } vTaskDelay(pdMS_TO_TICKS(10)); return res; } Code: Untitled.txtSelect all ...
#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...
static i2c_master_dev_handle_t dev_handle; static int8_t bmi3_i2c_read(uint8_t reg_addr, uint8_t *data, uint32_t len, void *intf_ptr) { i2c_master_dev_handle_t handle = (i2c_master_dev_handle_t)intf_ptr; esp_err_t ret = i2c_master_transmit_receive(handle, ®_addr, 1...
I2C概述 I2C全称是Inter-Integrated Circuit,是飞利浦半导体公司(06年迁移到NXP了)在1982年发明的,是使用非常广泛的一种通信协议,很多传感器、存储芯片、OLED等,都是在使用I2C。标准输出模式下能达到100kbps的传输速率,快速模式下能达到400kbps的传输速率,高速模式下能达到3.4Mbps,超高速下最快能达到5Mbps。 与UART一...
i2c_obj_t i2c0_master;/*** @brief程序入口* @param无* @retval无*/void app_main(void){esp_...
i2c_obj_t i2c0_master;/*** @brief程序入口* @param无* @retval无*/void app_main(void){esp_...