代码逻辑(来自网络) ESP32的I2C master接口介绍(来自网络) esp32wifi底层驱动是不开源的,以下是esp32 wifi状态机工作原理的流程图 ESP32的WIFI状态机总结 初始化wifi配置后,程序会根据WIFI的实时状态,在回调函数中给出状态返回,所以只需要在回调中进行相关操作,接下来讲解状态机的解析。 状态机解析 回调原型 st
conf.master.clk_speed = SCCB_FREQ; //driver/i2c.c i2c_param_config(SCCB_I2C_PORT, &conf); //主模式i2c i2c_driver_install(SCCB_I2C_PORT, conf.mode, 0, 0, 0); return 0; } uint8_tSCCB_Probe(void) { uint8_t slave_addr = 0x0; ...
i2c_transfer 函数最终会调用 I2C 适配器中 i2c_algorithm 里面的 master_xfer 函数。 int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) 1. 2. 3. adap:所使用的 I2C 适配器,i2c_client 会保存其对应的 i2c_adapter。 msgs:I2C 要发送的一个或多个消息。 num:消息数量,也...
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 ...
72 + esp_err_t ret = i2c_master_probe(i2c_bus_, address, pdMS_TO_TICKS(200)); 73 + if (ret == ESP_OK) { 74 + printf("%02x ", address); 75 + } else if (ret == ESP_ERR_TIMEOUT) { 76 + printf("UU "); 77 + } else { 78 + printf("-- "); 79 + }...
With the IDF's new I2C driver, this functionality is already provided for you in i2c_master_probe().5 posts • Page 1 of 1 Return to “ESP-IDF” Jump to Who is online Users browsing this forum: Baidu [Spider], Bing [Bot], nopnop2002, ok-home and 2 guestsAll...
esp_err_t ret = i2c_master_probe(i2c_bus_, address, pdMS_TO_TICKS(200)); if (ret == ESP_OK) { printf("%02x ", address); } else if (ret == ESP_ERR_TIMEOUT) { printf("UU "); } else { printf("-- "); } } printf("\r\n"); } } static void touchpad_daemon(void *...
I (345) sccb: sccb_i2c_port=1 I (349) gpio: GPIO[32]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 E (389) camera: Camera probe failed with error 0x105(ESP_ERR_NOT_FOUND) E (390) example:take_picture: init camrea sensor fail I (391) main_...
ov2640初始化关键的是camera_config_t config的初始设置(各引脚的设置),该函数esp_camera_init(&config)正确执行后,esp32与ov2640见就建立I2C通讯,esp32为主机(master)ov2640为从机(slave),可以写ov2640的寄存器来进一步设置摄像头(例如set_vflip(s, 1)垂直翻转等),以及进行获取图像动作(esp_camera_fb_get()...
What things might cause i2c_master_cmd_begin() to return a "timeout" error code (263)? My understanding was that the timeout, in the sense of the parameter passed to i2c_master_cmd_begin(), is just a timeout on putting the I2C sequence into a queue internally so that it can be ...